WorksheetsEcology Exam 4 Study guide
Total questions: 116
Worksheet time: 3600secs
Tinbergen's Questions: Mechanism (Causation)
What Factors trigger a given behavior in an individual?
How does this behavior develop over the lifespan of an individual?
Why is this behavior adaptive for the individual?
How has this behavior evolved and why does it differ between species?
Tinbergen's Questions: Ontogeny (Development)
What Factors trigger a given behavior in an individual?
How does this behavior develop over the lifespan of an individual?
Why is this behavior adaptive for the individual?
How has this behavior evolved and why does it differ between species?
Tinbergen's Questions: Adaptive Value (Function)
What Factors trigger a given behavior in an individual?
How does this behavior develop over the lifespan of an individual?
Why is this behavior adaptive for the individual?
How has this behavior evolved and why does it differ between species?
Tinbergen's Questions: Phylogeny (Evolution)
What Factors trigger a given behavior in an individual?
How does this behavior develop over the lifespan of an individual?
Why is this behavior adaptive for the individual?
How has this behavior evolved and why does it differ between species?
What 2 factors determine local species diversity?
# of species in the reginal species pool - Gamma Diversity
# of species in the reginal species pool - Alpha Diversity
Local species interactions
Local species compitetion
List of Threatened species
33% of all species
Reptiles - 6%
Amphibians - 29%
Mammals - 21%
Birds - 12%
Fish - 6%
Reptiles - 20%
Amphibians - 9%
Mammals - 12%
Birds - 21%
Fish - 6%
Why do we protect biodiversity?
Genetic Library
Ecosystem services
Aesthetic and ethical obligation
Extinction Index
Humans are in danger of being extinct
Island stuff: Which Island has the greater species diversity
A large island near the mainland
A small island near the mainland
A small island farther from the mainland
A large island farther from the mainland
When an island faces an extinction, describe what the species diversity would look like afterwards
Arrives at the same equilibrium (same # of species), but may be occupied by different species
Arrives at the same equilibrium (same # of species), and will always be occupied by the same species
Arrives at a different equilibrium, but may be occupied by different species
Arrives at a different equilibrium, and will always be occupied by the same species
How did Marsupials make it to where they are now?
Asia -> N.A -> S.A, Africa, Antarctica, Asia, Australia -> S.A and Australia -> S.A, Australia, N.A
S.A and Australia -> S.A, Australia, N.A ->Asia -> N.A -> S.A, Africa, Antarctica, Asia, Australia
S.A, Australia, N.A ->Asia -> S.A, Africa, Antarctica, Asia, Australia
S.A, Africa, Antarctica, Asia, Australia -> S.A, Australia, N.A ->Asia and Australia
Define: Biogeographic realms
1st tier of a classification scheme that divides Earth's landscaped into broad geographic areas based on the phylogenetic relationships of their biota
2nd tier of a classification scheme that divides Earth's landscaped into broad geographic areas based on the phylogenetic relationships of their biota
50% of A's have N.A roots
10% of A's have S.A roots
Define: Biogeographic regions
1st tier of a classification scheme that divides Earth's landscaped into broad geographic areas based on the phylogenetic relationships of their biota
2nd tier of a classification scheme that divides Earth's landscaped into broad geographic areas based on the phylogenetic relationships of their biota
50% of A's have N.A roots
10% of A's have S.A roots
Define: S.A species roots
1st tier of a classification scheme that divides Earth's landscaped into broad geographic areas based on the phylogenetic relationships of their biota
2nd tier of a classification scheme that divides Earth's landscaped into broad geographic areas based on the phylogenetic relationships of their biota
50% of A's have N.A roots
10% of A's have S.A roots
Define: N.A species roots
1st tier of a classification scheme that divides Earth's landscaped into broad geographic areas based on the phylogenetic relationships of their biota
2nd tier of a classification scheme that divides Earth's landscaped into broad geographic areas based on the phylogenetic relationships of their biota
50% of A's have N.A roots
10% of A's have S.A roots
Define: Biogeography
Study of the geographical distribution of species
Study of the factors that determine currents species distributions and the composition of extant bigots, focusing both on interactions among organisms and on interactions between organisms and their abiotic environment
Study of how evolutionary lineages affect current and historic distributions of species and biotas, paying particular attention to the roles played by speciation, extinction, and dispersal
Define: Ecological Biogeography
Study of the geographical distribution of species
Study of the factors that determine currents species distributions and the composition of extant bigots, focusing both on interactions among organisms and on interactions between organisms and their abiotic environment
Study of how evolutionary lineages affect current and historic distributions of species and biotas, paying particular attention to the roles played by speciation, extinction, and dispersal
Define: Historical Biogeography
Study of the geographical distribution of species
Study of the factors that determine currents species distributions and the composition of extant bigots, focusing both on interactions among organisms and on interactions between organisms and their abiotic environment
Study of how evolutionary lineages affect current and historic distributions of species and biotas, paying particular attention to the roles played by speciation, extinction, and dispersal
Community Diversity: Alpha/Local Diversity
The # of species occupying a relatively small, comparatively homogenous site
The # of species in a comparatively broad geographic region ranging from a group of local communities to biomes, continents, or even entire ocean basins
The change in species composition over relatively short distances
Community Diversity: Gamma/Regional Diversity
The # of species occupying a relatively small, comparatively homogenous site
The # of species in a comparatively broad geographic region ranging from a group of local communities to biomes, continents, or even entire ocean basins
The change in species composition over relatively short distances
Community Diversity: Beta Diversity/species turnover
The # of species occupying a relatively small, comparatively homogenous site
The # of species in a comparatively broad geographic region ranging from a group of local communities to biomes, continents, or even entire ocean basins
The change in species composition over relatively short distances
Define: Latitudinal Diversity gradient
Species diversity increases as you get closer to the equator, as it decreases the farther away you are
34, 50% endemic plants, 75% threatened Animals
6 all across the globe, 3 in the northern hemisphere, and 3 in the southern hemisphere
Asserts that evolution has favored behaviors
that maximize an individual's rate of food harvest and/or intake
Ideally, the behavioral ecologists studying optimal foraging would test different hypothesis by measuring how fitness varies with different foraging strategies
Define: Hotspots
Species diversity increases as you get closer to the equator, as it decreases the farther away you are
34, 50% endemic plants, 75% threatened Animals
6 all across the globe, 3 in the northern hemisphere, and 3 in the southern hemisphere
Asserts that evolution has favored behaviors
that maximize an individual's rate of food harvest and/or intake
Ideally, the behavioral ecologists studying optimal foraging would test different hypothesis by measuring how fitness varies with different foraging strategies
Define: Air circulation Cells
Species diversity increases as you get closer to the equator, as it decreases the farther away you are
34, 50% endemic plants, 75% threatened Animals
6 all across the globe, 3 in the northern hemisphere, and 3 in the southern hemisphere
Asserts that evolution has favored behaviors
that maximize an individual's rate of food harvest and/or intake
Ideally, the behavioral ecologists studying optimal foraging would test different hypothesis by measuring how fitness varies with different foraging strategies
Define: Optimal Foraging Theory
Species diversity increases as you get closer to the equator, as it decreases the farther away you are
34, 50% endemic plants, 75% threatened Animals
6 all across the globe, 3 in the northern hemisphere, and 3 in the southern hemisphere
Asserts that evolution has favored behaviors
that maximize an individual's rate of food harvest and/or intake
Ideally, the behavioral ecologists studying optimal foraging would test different hypothesis by measuring how fitness varies with different foraging strategies
Define: Optimal Foraging Theory
Species diversity increases as you get closer to the equator, as it decreases the farther away you are
34, 50% endemic plants, 75% threatened Animals
6 all across the globe, 3 in the northern hemisphere, and 3 in the southern hemisphere
Asserts that evolution has favored behaviors
that maximize an individual's rate of food
harvest and/or intake
Assumptions about Optimal Foraging Theory
Exclusively of search and exploitation (they are the only ones)
Items can only be encountered 1 by 1
Complete info (forager will act as if it knows the model boundaries)
Items can only be encountered at any set number
Incomplete info (forager has no idea of what the model boundaries are
Define: Marginal Value Theorem
Determines when an organism facing diminishing
returns on investment should abandoned a patch, mate, or other resource
Prey and Patch models
Rapid increase in extinction caused by humans becoming the dominant species on earth
Splitting of one species into 2 distinct species
All of the living organisms within an ecosystem including plants, animals, bacteria, and fungi
Define: Extinction Crisis
Determines when an organism facing diminishing
returns on investment should abandoned a patch, mate, or other resource
Prey and Patch models
Rapid increase in extinction caused by humans becoming the dominant species on earth
Splitting of one species into 2 distinct species
All of the living organisms within an ecosystem including plants, animals, bacteria, and fungi
Define: Speciation
Determines when an organism facing diminishing
returns on investment should abandoned a patch, mate, or other resource
Prey and Patch models
Rapid increase in extinction caused by humans becoming the dominant species on earth
Splitting of one species into 2 distinct species
All of the living organisms within an ecosystem including plants, animals, bacteria, and fungi
Define: Biota
Determines when an organism facing diminishing
returns on investment should abandoned a patch, mate, or other resource
Prey and Patch models
Rapid increase in extinction caused by humans becoming the dominant species on earth
Splitting of one species into 2 distinct species
All of the living organisms within an ecosystem including plants, animals, bacteria, and fungi
Define: Buffors Law
States that despite having similar climates different regions of the globe frequently have distinct biotas
Restrictive of the occurrence of species to a defined geographic area/local regional abundance of endemic species within a specific location
When a population might go extinct on its own, but immigrants join the population and thereby prevent extinction
Define: Endemism
States that despite having similar climates different regions of the globe frequently have distinct biotas
Restrictive of the occurrence of species to a defined geographic area/local regional abundance of endemic species within a specific location
When a population might go extinct on its own, but immigrants join the population and thereby prevent extinction
Define: Population rescue
States that despite having similar climates different regions of the globe frequently have distinct biotas
Restrictive of the occurrence of species to a defined geographic area/local regional abundance of endemic species within a specific location
When a population might go extinct on its own, but immigrants join the population and thereby prevent extinction
What Realms is the Americas broken up into?
All three, Holarctic Realm (Laurasia), Holotropical Realm (Eastern Gondwana), and Austral Realm
Holarctic Realm (Laurasia) only
Holotropical Realm (Eastern Gondwana) only
Austral Realm only
What 3 regions is the Americas broken up into?
1 Nearctic Region
3 Neotropical Region
7 Andean Region
2 Palearctic Region
3 Neotropical Region
7 Andean Region
1 Nearctic Region
2 Palearctic Region
3 Neotropical Region
Define: Equilibrium Theory of Island biogeography
Proposes that immigration and extinction rate determine species richness found on an island
The rate at which the composition of the species on an island changes over time
Argues that Large areas contain more species because they tend to contain more distinct habitats and this can support different species with specialized habitat requirements
Define: Species Habitat Diversity Hypothesis
Proposes that immigration and extinction rate determine species richness found on an island
The rate at which the composition of the species on an island changes over time
Argues that Large areas contain more species because they tend to contain more distinct habitats and this can support different species with specialized habitat requirements
Define: Equilibrium Turnover Rate
Proposes that immigration and extinction rate determine species richness found on an island
The rate at which the composition of the species on an island changes over time
Argues that Large areas contain more species because they tend to contain more distinct habitats and this can support different species with specialized habitat requirements
Define: Corridors
A route, often narrowly defined, that nearly all members of a taxon can easily traverse
Dispersal pathways that tend to selectively prevent some species from passing while allowing others through
Dispersal pathways that are nearly impossible for a species to cross except during rare and unpredictable circumstances
Define: Filters
A route, often narrowly defined, that nearly all members of a taxon can easily traverse
Dispersal pathways that tend to selectively prevent some species from passing while allowing others through
Dispersal pathways that are nearly impossible for a species to cross except during rare and unpredictable circumstances
Define: Sweepstakes Routes
A route, often narrowly defined, that nearly all members of a taxon can easily traverse
Dispersal pathways that tend to selectively prevent some species from passing while allowing others through
Dispersal pathways that are nearly impossible for a species to cross except during rare and unpredictable circumstances
Define: Jump Dispersal
Long-distance dispersal between 2 habitat patches that is accomplished relatively quickly, often in a single bound
Range expansion that is accomplished over many generations as individuals on the margins of a species range expand into unoccupied habitat
Species range expansion that occurs over many, many generations and which takes so long that the species evolve en route with populations adapting via natural selection to new environments they encounter as they move across the landscape
Define: Diffusion
Long-distance dispersal between 2 habitat patches that is accomplished relatively quickly, often in a single bound
Range expansion that is accomplished over many generations as individuals on the margins of a species range expand into unoccupied habitat
Species range expansion that occurs over many, many generations and which takes so long that the species evolve en route with populations adapting via natural selection to new environments they encounter as they move across the landscape
Define: Secular Migration
Long-distance dispersal between 2 habitat patches that is accomplished relatively quickly, often in a single bound
Range expansion that is accomplished over many generations as individuals on the margins of a species range expand into unoccupied habitat
Species range expansion that occurs over many, many generations and which takes so long that the species evolve en route with populations adapting via natural selection to new environments they encounter as they move across the landscape
Define: Allopatric Speciation
Also known as evolution via vicariance, it occurs when a population of a species is separated physically (Iceberg), and slowly evolve into two different species
When species are still together, begin intermixing when the lakes formed via the glaciers interconnect, and species evolve that way
Hadley, Ferrel, and Polar
Define: Sympatric Speciation
Also known as evolution via vicariance, it occurs when a population of a species is separated physically (Iceberg), and slowly evolve into two different species
When species are still together, begin intermixing when the lakes formed via the glaciers interconnect, and species evolve that way
Hadley, Ferrel, and Polar
What are the Air circulation cells caled
Also known as evolution via vicariance, it occurs when a population of a species is separated physically (Iceberg), and slowly evolve into two different species
When species are still together, begin intermixing when the lakes formed via the glaciers interconnect, and species evolve that way
Hadley (equator), Ferrel (Middle), and Polar (North & South Poles)
Define: Tectonic Plates
Stiff, irregularly shaped slab of solid rock which is a part of the earths crust, 14 total
Occurs when 2 geologic plates are moving away from 1 another
Occurs when 2 geologic plates are moving toward 1 another
Occurs when 2 geologic plates are sliding past 1 another
Define: Divergent boundaries
Stiff, irregularly shaped slab of solid rock which is a part of the earths crust, 14 total
Occurs when 2 geologic plates are moving away from 1 another
Occurs when 2 geologic plates are moving toward 1 another
Occurs when 2 geologic plates are sliding past 1 another
Define: Convergent boundaries
Stiff, irregularly shaped slab of solid rock which is a part of the earths crust, 14 total
Occurs when 2 geologic plates are moving away from 1 another
Occurs when 2 geologic plates are moving toward 1 another
Occurs when 2 geologic plates are sliding past 1 another
Define: Transform boundaries
Stiff, irregularly shaped slab of solid rock which is a part of the earths crust, 14 total
Occurs when 2 geologic plates are moving away from 1 another
Occurs when 2 geologic plates are moving toward 1 another
Occurs when 2 geologic plates are sliding past 1 another
Define: Founders Effect
Colonization of a new habitat by a few founding individuals
Occurs when 2 extremes of a trait are selected for and or the intermediate values are selected against, producing a bimodal distribution of population trait values over time
Type of atmospheric circulation Cell, that is derived by the heating of the earth surface at the equator
Extent to which an adaption improves the evolution fitness of an individual
Define: Disruptive Selection
Colonization of a new habitat by a few founding individuals
Occurs when 2 extremes of a trait are selected for and or the intermediate values are selected against, producing a bimodal distribution of population trait values over time
Type of atmospheric circulation Cell, that is derived by the heating of the earth surface at the equator
Extent to which an adaption improves the evolution fitness of an individual
Define: Hadley Cell
Colonization of a new habitat by a few founding individuals
Occurs when 2 extremes of a trait are selected for and or the intermediate values are selected against, producing a bimodal distribution of population trait values over time
Type of atmospheric circulation Cell, that is derived by the heating of the earth surface at the equator
Extent to which an adaption improves the evolution fitness of an individual
Define: Adaptive Value
Colonization of a new habitat by a few founding individuals
Occurs when 2 extremes of a trait are selected for and or the intermediate values are selected against, producing a bimodal distribution of population trait values over time
Type of atmospheric circulation Cell, that is derived by the heating of the earth surface at the equator
Extent to which an adaption improves the evolution fitness of an individual
Define: Great American Biotic Interchange
Exchange of terrestrial fauna and flora between N&S. America that resulted from the emergence of the isthmus of Panama about 3.5 million years ago
Narrow land bridge connecting two larger land masses, N.A & S.A
Describes a foraging strategy typically of animals that repeatedly venture out from a central place or nest to forage and then return to consume or store their food
The apparent deflection of objects across a rotating sphere
Define: Isthmus of Panama
Exchange of terrestrial fauna and flora between N&S. America that resulted from the emergence of the isthmus of Panama about 3.5 million years ago
Narrow land bridge connecting two larger land masses, N.A & S.A
Describes a foraging strategy typically of animals that repeatedly venture out from a central place or nest to forage and then return to consume or store their food
The apparent deflection of objects across a rotating sphere
Define: Central Place foraging
Exchange of terrestrial fauna and flora between N&S. America that resulted from the emergence of the isthmus of Panama about 3.5 million years ago
Narrow land bridge connecting two larger land masses, N.A & S.A
Describes a foraging strategy typically of animals that repeatedly venture out from a central place or nest to forage and then return to consume or store their food
The apparent deflection of objects across a rotating sphere
Define: Coriolis effect
Exchange of terrestrial fauna and flora between N&S. America that resulted from the emergence of the isthmus of Panama about 3.5 million years ago
Narrow land bridge connecting two larger land masses, N.A & S.A
Describes a foraging strategy typically of animals that repeatedly venture out from a central place or nest to forage and then return to consume or store their food
The apparent deflection of objects across a rotating sphere
What are all the Human-Caused Global changes?
Alternations to the Carbon cycle and associated changes to the climate
Alter nutrient cycles, particularly Nitrogen and Phosphorus
Production and release of persistent organic chemicals like chlorofluorocarbons and estrogenmimickying chemicals
Wide-spread changes in land use, and land cover
Over hunting and overharvesting
Introduction of invasive species by non-native species
Alternations to the Nitrogen and Phosphorus cycles and associated changes to the climate
Alter nutrient cycles, particularly Carbon
Only overharvesting
Introduction of invasive species by non-native species
Define: Perceived predator risk
How an individual perceives its likelihood of being eaten by a predator
Caused by changes in an individuals perception of the abundance of predatory risk
Caused by changes in an individuals predator of the riskiness of its environment either because the availability of refuges change or because environmental conditions change in ways that make it easier or harder for a predator to capture the individual
Measure of the perceived cost of foraging
Define: Direct changes in Perceived predator risk
How an individual perceives its likelihood of being eaten by a predator
Caused by changes in an individuals perception of the abundance of predatory risk
Caused by changes in an individuals predator of the riskiness of its environment either because the availability of refuges change or because environmental conditions change in ways that make it easier or harder for a predator to capture the individual
Measure of the perceived cost of foraging
Define: Indirect changes in Perceived predator risk
How an individual perceives its likelihood of being eaten by a predator
Caused by changes in an individuals perception of the abundance of predatory risk
Caused by changes in an individuals predator of the riskiness of its environment either because the availability of refuges change or because environmental conditions change in ways that make it easier or harder for a predator to capture the individual
Measure of the perceived cost of foraging
Define: Giving-up-Density
How an individual perceives its likelihood of being eaten by a predator
Caused by changes in an individuals perception of the abundance of predatory risk
Caused by changes in an individuals predator of the riskiness of its environment either because the availability of refuges change or because environmental conditions change in ways that make it easier or harder for a predator to capture the individual
Measure of the perceived cost of foraging
Define: Optimality Theory
Asserts that evolution has favored behaviors that are in some way, optimal. Behaviors often described as those that maximize the difference between benefits and costs
Assess the value of a particular behavior or choice by comparing associated costs and benefits
Rate at which a predator gains energy from a given prey item
Describe the decrease in the marginal returns as total investment is increased, assuming all else remains constant
Define: Cost-benefit model assess
Asserts that evolution has favored behaviors that are in some way, optimal. Behaviors often described as those that maximize the difference between benefits and costs
Assess the value of a particular behavior or choice by comparing associated costs and benefits
Rate at which a predator gains energy from a given prey item
Describe the decrease in the marginal returns as total investment is increased, assuming all else remains constant
Define: Profitability
Asserts that evolution has favored behaviors that are in some way, optimal. Behaviors often described as those that maximize the difference between benefits and costs
Assess the value of a particular behavior or choice by comparing associated costs and benefits
Rate at which a predator gains energy from a given prey item
Describe the decrease in the marginal returns as total investment is increased, assuming all else remains constant
Define: Diminishing Returns
Asserts that evolution has favored behaviors that are in some way, optimal. Behaviors often described as those that maximize the difference between benefits and costs
Assess the value of a particular behavior or choice by comparing associated costs and benefits
Rate at which a predator gains energy from a given prey item
Describe the decrease in the marginal returns as total investment is increased, assuming all else remains constant
Define: Display
Stylized form of behavior used to advertise certain attributes
ex. courtship, pred-prey interactions, and conflicts
Study of strategical decision making in contests with 2 or more players
2 players compete for control of a resource
_____ - Aggressive and will escalate every contest to a fight, risking grievous injury when their opponent also plays _____. Always beat _____, 50/50 with other ____
______ - Never fight and therfore never get injured. Attempt to win contests through displays. Immediately back down from ____, 50/50 with other ____
Define: Game Theory
Stylized form of behavior used to advertise certain attributes
ex. courtship, pred-prey interactions, and conflicts
Study of strategical decision making in contests with 2 or more players
2 players compete for control of a resource
_____ - Aggressive and will escalate every contest to a fight, risking grievous injury when their opponent also plays _____. Always beat _____, 50/50 with other ____
______ - Never fight and therfore never get injured. Attempt to win contests through displays. Immediately back down from ____, 50/50 with other ____
Define: Hawk-Dove Game
Stylized form of behavior used to advertise certain attributes
ex. courtship, pred-prey interactions, and conflicts
Study of strategical decision making in contests with 2 or more players
2 players compete for control of a resource
_____ - Aggressive and will escalate every contest to a fight, risking grievous injury when their opponent also plays _____. Always beat _____, 50/50 with other ____
______ - Never fight and therfore never get injured. Attempt to win contests through displays. Immediately back down from ____, 50/50 with other ____
Define: Hawk role
Stylized form of behavior used to advertise certain attributes
ex. courtship, pred-prey interactions, and conflicts
Study of strategical decision making in contests with 2 or more players
2 players compete for control of a resource
_____ - Aggressive and will escalate every contest to a fight, risking grievous injury when their opponent also plays _____. Always beat _____, 50/50 with other ____
______ - Never fight and therfore never get injured. Attempt to win contests through displays. Immediately back down from ____, 50/50 with other ____
Define: Dove role
Stylized form of behavior used to advertise certain attributes
ex. courtship, pred-prey interactions, and conflicts
Study of strategical decision making in contests with 2 or more players
2 players compete for control of a resource
_____ - Aggressive and will escalate every contest to a fight, risking grievous injury when their opponent also plays _____. Always beat _____, 50/50 with other ____
______ - Never fight and therfore never get injured. Attempt to win contests through displays. Immediately back down from ____, 50/50 with other ____
Define: Evolutionary Stable Strategy
One that cannot be invaded by an alternative strategy, single pure strategy or mix of strategies
Refers to the fact that the fitness of a particular phenotypic trait depends on its relative abundance within the population as a whole
A foraging strategy in which 1 animal steals food from another that has already captured or harvested or otherwise incurred some cost precuring the food
Player adopts the hawk role when in its own territory and dove when its not, territory owner most likely wins against the challenger
A game played between 2 players who must each choose whether to cooperate or defect before knowing what the other will do
Define: Frequency-based selection
One that cannot be invaded by an alternative strategy, single pure strategy or mix of strategies
Refers to the fact that the fitness of a particular phenotypic trait depends on its relative abundance within the population as a whole
A foraging strategy in which 1 animal steals food from another that has already captured or harvested or otherwise incurred some cost precuring the food
Player adopts the hawk role when in its own territory and dove when its not, territory owner most likely wins against the challenger
A game played between 2 players who must each choose whether to cooperate or defect before knowing what the other will do
Define: Kleptoparasitism
One that cannot be invaded by an alternative strategy, single pure strategy or mix of strategies
Refers to the fact that the fitness of a particular phenotypic trait depends on its relative abundance within the population as a whole
A foraging strategy in which 1 animal steals food from another that has already captured or harvested or otherwise incurred some cost precuring the food
Player adopts the hawk role when in its own territory and dove when its not, territory owner most likely wins against the challenger
A game played between 2 players who must each choose whether to cooperate or defect before knowing what the other will do
Define: Bourgeois
One that cannot be invaded by an alternative strategy, single pure strategy or mix of strategies
Refers to the fact that the fitness of a particular phenotypic trait depends on its relative abundance within the population as a whole
A foraging strategy in which 1 animal steals food from another that has already captured or harvested or otherwise incurred some cost precuring the food
Player adopts the hawk role when in its own territory and dove when its not, territory owner most likely wins against the challenger
A game played between 2 players who must each choose whether to cooperate or defect before knowing what the other will do
Define: Prisoner's Dilemma
One that cannot be invaded by an alternative strategy, single pure strategy or mix of strategies
Refers to the fact that the fitness of a particular phenotypic trait depends on its relative abundance within the population as a whole
A foraging strategy in which 1 animal steals food from another that has already captured or harvested or otherwise incurred some cost precuring the food
Player adopts the hawk role when in its own territory and dove when its not, territory owner most likely wins against the challenger
A game played between 2 players who must each choose whether to cooperate or defect before knowing what the other will do
Define: Polygyny
Mating system in which a Male mates with more than 1 female, but each female mates with only 1 male during a single breeding season
Form of sexual reproduction in which the zygote is formed from the union of 2 gametes of unequal size and unlike form
Female - Larger more expensive Gamete
Male - Smaller more cheap Gamete
Female preference creates an evolutionary feedback loop that select for more and more extreme male ornaments
Any investment in an individual offspring that increase the offspring chance of surviving at the cost of the parents ability to invest in other offspring
Define: Anisogamy
Mating system in which a Male mates with more than 1 female, but each female mates with only 1 male during a single breeding season
Form of sexual reproduction in which the zygote is formed from the union of 2 gametes of unequal size and unlike form
Female - Larger more expensive Gamete
Male - Smaller more cheap Gamete
Female preference creates an evolutionary feedback loop that select for more and more extreme male ornaments
Any investment in an individual offspring that increase the offspring chance of surviving at the cost of the parents ability to invest in other offspring
Define: Runaway Sexual Selection
Mating system in which a Male mates with more than 1 female, but each female mates with only 1 male during a single breeding season
Form of sexual reproduction in which the zygote is formed from the union of 2 gametes of unequal size and unlike form
Female - Larger more expensive Gamete
Male - Smaller more cheap Gamete
Female preference creates an evolutionary feedback loop that select for more and more extreme male ornaments
Any investment in an individual offspring that increase the offspring chance of surviving at the cost of the parents ability to invest in other offspring
Define: Parental Investment
Mating system in which a Male mates with more than 1 female, but each female mates with only 1 male during a single breeding season
Form of sexual reproduction in which the zygote is formed from the union of 2 gametes of unequal size and unlike form
Female - Larger more expensive Gamete
Male - Smaller more cheap Gamete
Female preference creates an evolutionary feedback loop that select for more and more extreme male ornaments
Any investment in an individual offspring that increase the offspring chance of surviving at the cost of the parents ability to invest in other offspring
What percentage of mammalian species are female only care?
91%
81%
To copulate (fuck) with another's mate
Strength of a males confidence that he's the father of a given offspring or broad
Increases when he doesn't see any other males and the offspring look like him
Decrease when he does see another male, and when the offspring don't look like him
What percentage of avian species are biparental only care?
91%
81%
To copulate (fuck) with another's mate
Strength of a males confidence that he's the father of a given offspring or broad
Increases when he doesn't see any other males and the offspring look like him
Decrease when he does see another male, and when the offspring don't look like him
Define: Cuckold
91%
81%
To copulate (fuck) with another's mate
Strength of a males confidence that he's the father of a given offspring or broad
Increases when he doesn't see any other males and the offspring look like him
Decrease when he does see another male, and when the offspring don't look like him
Define: Paternity fraternity
91%
81%
To copulate (fuck) with another's mate
Strength of a males confidence that he's the father of a given offspring or broad
Increases when he doesn't see any other males and the offspring look like him
Decrease when he does see another male, and when the offspring don't look like him
Define: Monogamy
1 to 1 ratio
ex. Puffin and sea hroses
Multiple Females to 1 Male ratio
ex. Elk and Elephant Seals
1 Female to Multiple Males ratio
ex. Hyenas
Everyone and anyone ratio
ex. Cheetahs and bonobos
Rare
Define: Polygyny
1 to 1 ratio
ex. Puffin and sea hroses
Multiple Females to 1 Male ratio
ex. Elk and Elephant Seals
1 Female to Multiple Males ratio
ex. Hyenas
Everyone and anyone ratio
ex. Cheetahs and bonobos
Rare
Define: Polyandry
1 to 1 ratio
ex. Puffin and sea hroses
Multiple Females to 1 Male ratio
ex. Elk and Elephant Seals
1 Female to Multiple Males ratio
ex. Hyenas
Everyone and anyone ratio
ex. Cheetahs and bonobos
Rare
Define: Polygynandry
1 to 1 ratio
ex. Puffin and sea hroses
Multiple Females to 1 Male ratio
ex. Elk and Elephant Seals
1 Female to Multiple Males ratio
ex. Hyenas
Everyone and anyone ratio
ex. Cheetahs and bonobos
Rare
Monogamy +: Mate-assistance hypothesis
Males should be monogamous, if they can increase their fitness more by providing personal care than by seeking additional mating opportunities
Male may increase their reproductive output by guarding their mates, preventing them from mating with other mates
Female actively prevent males from seeking other mates
Monogamy +: Mate Guarding Hypothesis
Males should be monogamous, if they can increase their fitness more by providing personal care than by seeking additional mating opportunities
Male may increase their reproductive output by guarding their mates, preventing them from mating with other mates
Female actively prevent males from seeking other mates
Monogamy +: Female-enforced monogamy
Males should be monogamous, if they can increase their fitness more by providing personal care than by seeking additional mating opportunities
Male may increase their reproductive output by guarding their mates, preventing them from mating with other mates
Female actively prevent males from seeking other mates
Types of Polygyny: Female defense polygyny
When males compete for control of a harem and is epitomized by elephant seals and elk
Male compete to hold good territories that furnish resources
Males congregate on communal courting grounds (Leks) and attempt to woo mats with their displays
Types of Polygyny: Resource Defense polygyny
When males compete for control of a harem and is epitomized by elephant seals and elk
Male compete to hold good territories that furnish resources
Males congregate on communal courting grounds (Leks) and attempt to woo mats with their displays
Types of Polygyny: Lek polygyny
When males compete for control of a harem and is epitomized by elephant seals and elk
Male compete to hold good territories that furnish resources
Males congregate on communal courting grounds (Leks) and attempt to woo mats with their displays
Define: Broadcast Spawner
Animals that freely release gametes into the water
Wind Pollinated - Plants version
Form of Polygynandry
When an otherwise monogamous individual copulates outside of the pair bond with an individual that is not his or her mate
Resource care for offspring, protection, and increased fertility
Good sense that increase offspring fitness or attractiveness so that they can gain more reproductive opportunities
Define: Extra pair copulation
Animals that freely release gametes into the water
Wind Pollinated - Plants version
Form of Polygynandry
When an otherwise monogamous individual copulates outside of the pair bond with an individual that is not his or her mate
Resource care for offspring, protection, and increased fertility
Good sense that increase offspring fitness or attractiveness so that they can gain more reproductive opportunities
Intersexual Selection: Direct benefits
Animals that freely release gametes into the water
Wind Pollinated - Plants version
Form of Polygynandry
When an otherwise monogamous individual copulates outside of the pair bond with an individual that is not his or her mate
Resource care for offspring, protection, and increased fertility
Good sense that increase offspring fitness or attractiveness so that they can gain more reproductive opportunities
Intersexual Selection: Indirect benefits
Animals that freely release gametes into the water
Wind Pollinated - Plants version
Form of Polygynandry
When an otherwise monogamous individual copulates outside of the pair bond with an individual that is not his or her mate
Resource care for offspring, protection, and increased fertility
Good sense that increase offspring fitness or attractiveness so that they can gain more reproductive opportunities
Define: Altruism
A potentially costly act that benefits the recipient with out providing the actor with any benefits in return
ex. Vampire bats
When an actor behaves in a manner that both benefits the recipient and improves the actors inclusive fitness
Calling directly benefits the caller by helping it to avoid being caught
Calling indirectly benefits the caller by increasing the survival of close relatives who share some portion of the callers genes
Calling directly benefits the caller because the warning is reciprocated at a later time by the squirrels who are warned by the caller
Define: Cooperation
A potentially costly act that benefits the recipient with out providing the actor with any benefits in return
ex. Vampire bats
When an actor behaves in a manner that both benefits the recipient and improves the actors inclusive fitness
Calling directly benefits the caller by helping it to avoid being caught
Calling indirectly benefits the caller by increasing the survival of close relatives who share some portion of the callers genes
Calling directly benefits the caller because the warning is reciprocated at a later time by the squirrels who are warned by the caller
Define: Benefits Caller hypothesis
A potentially costly act that benefits the recipient with out providing the actor with any benefits in return
ex. Vampire bats
When an actor behaves in a manner that both benefits the recipient and improves the actors inclusive fitness
Calling directly benefits the caller by helping it to avoid being caught
Calling indirectly benefits the caller by increasing the survival of close relatives who share some portion of the callers genes
Calling directly benefits the caller because the warning is reciprocated at a later time by the squirrels who are warned by the caller
Define: Alerts Relatives hypothesis
A potentially costly act that benefits the recipient with out providing the actor with any benefits in return
ex. Vampire bats
When an actor behaves in a manner that both benefits the recipient and improves the actors inclusive fitness
Calling directly benefits the caller by helping it to avoid being caught
Calling indirectly benefits the caller by increasing the survival of close relatives who share some portion of the callers genes
Calling directly benefits the caller because the warning is reciprocated at a later time by the squirrels who are warned by the caller
Define: Reciprocity
A potentially costly act that benefits the recipient with out providing the actor with any benefits in return
ex. Vampire bats
When an actor behaves in a manner that both benefits the recipient and improves the actors inclusive fitness
Calling directly benefits the caller by helping it to avoid being caught
Calling indirectly benefits the caller by increasing the survival of close relatives who share some portion of the callers genes
Calling directly benefits the caller because the warning is reciprocated at a later time by the squirrels who are warned by the caller
4 Social interactions: Mutual Benefit
+/+ mutually benefice behaviors benefit both actor and recipient and are relatively easy to explain as they directly improve the fitness of both individuals
+/- Benefit actor while negatively impacting the recipent
-/+ benefit recipient but not the actor, puzzling
-/- neither individual gains a fitness benefit, both harmed, extremely rare
4 Social interactions: Selfishness
+/+ mutually benefice behaviors benefit both actor and recipient and are relatively easy to explain as they directly improve the fitness of both individuals
+/- Benefit actor while negatively impacting the recipent
-/+ benefit recipient but not the actor, puzzling
-/- neither individual gains a fitness benefit, both harmed, extremely rare
4 Social interactions: Altruism
+/+ mutually benefice behaviors benefit both actor and recipient and are relatively easy to explain as they directly improve the fitness of both individuals
+/- Benefit actor while negatively impacting the recipent
-/+ benefit recipient but not the actor, puzzling
-/- neither individual gains a fitness benefit, both harmed, extremely rare
4 Social interactions: Spite
+/+ mutually benefice behaviors benefit both actor and recipient and are relatively easy to explain as they directly improve the fitness of both individuals
+/- Benefit actor while negatively impacting the recipent
-/+ benefit recipient but not the actor, puzzling
-/- neither individual gains a fitness benefit, both harmed, extremely rare
Define: Pack hunting
All members can expect to gain some food, not just the one that takes down the prey
Creating a defensive circle to ward off a potential predator all of their young are most likely to survive
Subordinate male can maximize their inclusive fitness by forgoing breeding in order to help closely related dominant male achieving greater reproductive success
If breeding's territories are immitted a subordinate male may maximize its fitness by helping a dominate make until an opening appears
Define: Cooperative defense
All members can expect to gain some food, not just the one that takes down the prey
Creating a defensive circle to ward off a potential predator all of their young are most likely to survive
Subordinate male can maximize their inclusive fitness by forgoing breeding in order to help closely related dominant male achieving greater reproductive success
If breeding's territories are immitted a subordinate male may maximize its fitness by helping a dominate make until an opening appears
Define: Kin Selection
All members can expect to gain some food, not just the one that takes down the prey
Creating a defensive circle to ward off a potential predator all of their young are most likely to survive
Subordinate male can maximize their inclusive fitness by forgoing breeding in order to help closely related dominant male achieving greater reproductive success
If breeding's territories are immitted a subordinate male may maximize its fitness by helping a dominate make until an opening appears
Define: Patient Male
All members can expect to gain some food, not just the one that takes down the prey
Creating a defensive circle to ward off a potential predator all of their young are most likely to survive
Subordinate male can maximize their inclusive fitness by forgoing breeding in order to help closely related dominant male achieving greater reproductive success
If breeding's territories are immitted a subordinate male may maximize its fitness by helping a dominate make until an opening appears
How do the Hypothesis take form when a prey calls out a terrestrial predator?
Survival: Increases caller death x2
Survival: Decreases caller death x10
Caller: Majority Female
Caller: Both Male and Female
Discrimination: No discrimination
How do the Hypothesis take form when a prey calls out a arial predator?
Survival: Increases caller death x2
Survival: Decreases caller death x10
Caller: Majority Female
Caller: Both Male and Female
Discrimination: No discrimination
Eusocial "Truly social": 3 attributes
Strict division of reproductive labor, some breed while other don't
Cooperative care of the young
Overlapping generations, at least 2 overlapping generations share the colony labor
Reciprocal care of the young
Only made up of a single generation of organisms, and females only share the colony labor
