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WorksheetsEl-maestro_Aquaculture
Total questions: 61
Worksheet time: 31mins
In the harvest of milkfish using the pasulang or pasubang method, what behavior is usually observed in fish when water is drained and allowed back during high tide?
Swim towards the flow of current
Swim against the current
Hide to avoid catching
Remain on the pond bottom
Which area is considered the seaweed bowl of the Philippines?
Visayan Sea
Palawan
Mindanao-Sulu
Cuyo Pass
What is the major role of liming in pond preparation?
Increase pH of very acidic ponds
Lower pH of alkaline ponds
Enhance phytoplankton growth
Increase pH of slightly basic ponds
Which tilapia species has a truncated caudal fin, interrupted lateral line, and reddish fins during spawning?
Oreochromis aureus
Oreochromis mossambicus
Oreochromis niloticus
Sarotherodon melanotheron
Why is the Philippines not actively engaged in mussel export?
Lack of R&D
Small product size
Presence of red tide and toxins
High local demand
Which toxin causes Paralytic Shellfish Poisoning (PSP)?
Brevetoxin
Saxitoxin
Domoic acid
Ciguatoxin
Which toxin is responsible for Neurotoxic Shellfish Poisoning (NSP)?
Brevetoxin
Saxitoxin
Domoic acid
Ciguatoxin
Excessive algal bloom due to high nitrogen and phosphorus causing fish kill is called:
Thermal pollution
Bioaccumulation
Eutrophication
Acid rain
Which shrimp body part detects approaching predators?
Telson
Rostrum
Antennae
Swimmerets
Dugongs are best described as:
Carnivorous marine mammals
Freshwater mammals
Herbivorous marine mammals feeding on seagrass
Amphibious animals
Injection posterior to the dorsal fin above the midline of fish body is:
Intramuscular injection
Intraperitoneal injection
Intravenous injection
In vivo injection
Which anti-nutritional factor is found in soybean meal?
Gossypol
Mimosine
Phytic acid
Cyanogens
Practices that reduce disease risk in aquaculture facilities are called:
Epizootic surveillance
Biohazard management
Biocontrol strategy
Biosecurity measures
Which statement is NOT true about Kappaphycus and Gracilaria?
Both require salinity of 20-25 ppt
Hanging long-line method is used for Kappaphycus
Kappaphycus can be cultured at fishpond bottom
Kappaphycus is guso; Gracilaria is gulaman
What does PIT in PIT tagging stand for?
Passive Insulator Tag
Passive Injected Template
Passive Invasive Test
Passive Integrated Transponder
Which is NOT a local name for freshwater prawn (Macrobrachium)?
Urang
Ludong
Kising-kising
Budsang
Which technique hastens shrimp maturation and spawning?
Ligation
Cautery
Eyestalk ablation
Pinching
The dominant carp species cultured in Laguna de Bay fishpens is:
Silver carp
Bighead carp
Grass carp
Common carp
Monoammonium phosphate (MAP) fertilizer grade is:
46-0-0
14-14-14
21-0-0
16-20-0
Which observation indicates fish are NOT suitable for stocking?
Uniform size and color
Active swimming
Patches on body
Stress-free appearance
Milkfish harvest using tidal flow relies mainly on:
Fish feeding behavior
Fish migratory instinct
Fish response to water current
Fish spawning behavior
The primary purpose of fertilization in ponds is to increase:
Zooplankton predators
Phytoplankton production
Water salinity
Soil compaction
Which fertilizer supplies nitrogen only?
46-0-0
16-20-0
14-14-14
0-20-0
Which poisoning causes amnesic effects?
PSP
NSP
ASP
CFP
Red tide toxins mainly accumulate in:
Finfish muscle
Shellfish digestive glands
Seagrasses
Seaweeds
Which organism causes eutrophication when excessive?
Zooplankton
Phytoplankton
Benthos
Nekton
Shrimp escape response using tail-flip involves the:
Antennae
Telson
Rostrum
Chelipeds
The rostrum of shrimp mainly functions as:
Sensory organ
Protective spine
Swimming appendage
Feeding structure
Which tilapia species is most widely cultured worldwide?
O. aureus
O. mossambicus
O. niloticus
Sarotherodon sp.
Which fish health practice prevents disease entry?
Chemotherapy
Vaccination
Biosecurity
Quarantine treatment
Which fish health practice prevents disease entry?
Chemotherapy
Vaccination
Biosecurity
Quarantine treatment
Milkfish exhibit a behavior of swimming against the current during harvesting. This behavior is known as:
Rheotaxis
Phototaxis
Chemotaxis
Geotaxis
Which environmental factor is primarily corrected by liming acidic ponds?
Dissolved oxygen
Soil pH
Salinity
Temperature
Which seaweed is the main source of carrageenan?
Gracilaria
Kappaphycus
Sargassum
Ulva
Which seaweed is commonly processed into gulaman?
Kappaphycus
Eucheuma
Gracilaria
Caulerpa
Which shellfish poisoning is associated with memory loss?
PSP
NSP
ASP
DSP
The toxin responsible for Amnesic Shellfish Poisoning (ASP) is:
Saxitoxin
Brevetoxin
Domoic acid
Ciguatoxin
Which nutrient primarily causes eutrophication when present in excess?
Calcium
Potassium
Nitrogen and phosphorus
Magnesium
Which structure allows shrimp to quickly swim backward to escape predators?
Antennae
Chelipeds
Telson
Rostrum
Which fertilizer contains both nitrogen and phosphorus but no potassium?
Urea
Complete fertilizer
Monoammonium phosphate
Ammonium sulfate
Which carp species is known as silver carp?
Cyprinus carpio
Aristichthys nobilis
Hypophthalmichthys molitrix
Ctenopharyngodon idella
Which characteristic is typical of healthy fingerlings for stocking?
Erratic swimming
Visible lesions
Uniform size
Discoloration
Which carp species is known as bighead carp?
Hypophthalmichthys molitrix
Aristichthys nobilis
Cyprinus carpio
Ctenopharyngodon idella
Which anti-nutritional factor binds minerals and reduces their absorption?
Cyanogens
Gossypol
Phytic acid
Mimosine
The primary goal of biosecurity in aquaculture is to:
Increase growth rate
Reduce production cost
Prevent disease introduction and spread
Improve water clarity
Which method is used to identify individual broodstock using electronic readers?
Branding
Fin clipping
PIT tagging
Dye injection
Which local name refers to freshwater prawn (Macrobrachium)?
Urang
Bangus
Dalag
Lapulapu
Which shrimp maturation technique involves removal of endocrine control?
Pinching
Ligation
Eyestalk ablation
Cauterization
Which organism group is directly increased by pond fertilization?
Benthos
Nekton
Phytoplankton
Periphyton predators
Which carp species feeds mainly on aquatic vegetation?
Silver carp
Bighead carp
Grass carp
Common carp
Which condition commonly results from severe eutrophication?
Increased salinity
Hypoxia
Higher alkalinity
Clear water
Which fish behavior is exploited in tidal harvesting methods?
Territoriality
Schooling
Rheotaxis
Cannibalism
Which marine mammal feeds almost exclusively on seagrass?
Dolphin
Dugong
Seal
Whale shark
Which shellfish poisoning primarily affects the nervous system but is non-fatal?
PSP
NSP
ASP
DSP
Which practice helps ensure better survival during fish stocking?
Stocking mixed sizes
Stocking stressed fish
Stocking during extreme temperatures
Stocking healthy, active fish
Which fertilizer grade represents complete fertilizer?
46-0-0
21-0-0
16-20-0
14-14-14
Which shrimp body part mainly functions as a sensory organ?
Telson
Antennae
Rostrum
Abdomen
Which shellfish toxin blocks sodium channels and causes paralysis?
Domoic acid
Ciguatoxin
Brevetoxin
Saxitoxin
Which aquaculture practice aims to minimize chemical treatments?
Chemotherapy
Vaccination
Biosecurity
Hormonal induction
Which pond condition favors natural food production?
Clear water
Sterile bottom
Slightly green water
High turbidity
Which indicator best shows poor water quality in ponds?
Active fish feeding
Uniform fish size
Fish gasping at surface
Moderate algal growth
