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Worksheets

El-maestro_Aquaculture

Total questions: 61

Worksheet time: 31mins

Name
Class
Date
1.

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?

a)

Swim towards the flow of current

b)

Swim against the current

c)

Hide to avoid catching

d)

Remain on the pond bottom

2.

Which area is considered the seaweed bowl of the Philippines?

a)

Visayan Sea

b)

Palawan

c)

Mindanao-Sulu

d)

Cuyo Pass

3.

What is the major role of liming in pond preparation?

a)

Increase pH of very acidic ponds

b)

Lower pH of alkaline ponds

c)

Enhance phytoplankton growth

d)

Increase pH of slightly basic ponds

4.

Which tilapia species has a truncated caudal fin, interrupted lateral line, and reddish fins during spawning?

a)

Oreochromis aureus

b)

Oreochromis mossambicus

c)

Oreochromis niloticus

d)

Sarotherodon melanotheron

5.

Why is the Philippines not actively engaged in mussel export?

a)

Lack of R&D

b)

Small product size

c)

Presence of red tide and toxins

d)

High local demand

6.

Which toxin causes Paralytic Shellfish Poisoning (PSP)?

a)

Brevetoxin

b)

Saxitoxin

c)

Domoic acid

d)

Ciguatoxin

7.

Which toxin is responsible for Neurotoxic Shellfish Poisoning (NSP)?

a)

Brevetoxin

b)

Saxitoxin

c)

Domoic acid

d)

Ciguatoxin

8.

Excessive algal bloom due to high nitrogen and phosphorus causing fish kill is called:

a)

Thermal pollution

b)

Bioaccumulation

c)

Eutrophication

d)

Acid rain

9.

Which shrimp body part detects approaching predators?

a)

Telson

b)

Rostrum

c)

Antennae

d)

Swimmerets

10.

Dugongs are best described as:

a)

Carnivorous marine mammals

b)

Freshwater mammals

c)

Herbivorous marine mammals feeding on seagrass

d)

Amphibious animals

11.

Injection posterior to the dorsal fin above the midline of fish body is:

a)

Intramuscular injection

b)

Intraperitoneal injection

c)

Intravenous injection

d)

In vivo injection

12.

Which anti-nutritional factor is found in soybean meal?

a)

Gossypol

b)

Mimosine

c)

Phytic acid

d)

Cyanogens

13.

Practices that reduce disease risk in aquaculture facilities are called:

a)

Epizootic surveillance

b)

Biohazard management

c)

Biocontrol strategy

d)

Biosecurity measures

14.

Which statement is NOT true about Kappaphycus and Gracilaria?

a)

Both require salinity of 20-25 ppt

b)

Hanging long-line method is used for Kappaphycus

c)

Kappaphycus can be cultured at fishpond bottom

d)

Kappaphycus is guso; Gracilaria is gulaman

15.

What does PIT in PIT tagging stand for?

a)

Passive Insulator Tag

b)

Passive Injected Template

c)

Passive Invasive Test

d)

Passive Integrated Transponder

16.

Which is NOT a local name for freshwater prawn (Macrobrachium)?

a)

Urang

b)

Ludong

c)

Kising-kising

d)

Budsang

17.

Which technique hastens shrimp maturation and spawning?

a)

Ligation

b)

Cautery

c)

Eyestalk ablation

d)

Pinching

18.

The dominant carp species cultured in Laguna de Bay fishpens is:

a)

Silver carp

b)

Bighead carp

c)

Grass carp

d)

Common carp

19.

Monoammonium phosphate (MAP) fertilizer grade is:

a)

46-0-0

b)

14-14-14

c)

21-0-0

d)

16-20-0

20.

Which observation indicates fish are NOT suitable for stocking?

a)

Uniform size and color

b)

Active swimming

c)

Patches on body

d)

Stress-free appearance

21.

Milkfish harvest using tidal flow relies mainly on:

a)

Fish feeding behavior

b)

Fish migratory instinct

c)

Fish response to water current

d)

Fish spawning behavior

22.

The primary purpose of fertilization in ponds is to increase:

a)

Zooplankton predators

b)

Phytoplankton production

c)

Water salinity

d)

Soil compaction

23.

Which fertilizer supplies nitrogen only?

a)

46-0-0

b)

16-20-0

c)

14-14-14

d)

0-20-0

24.

Which poisoning causes amnesic effects?

a)

PSP

b)

NSP

c)

ASP

d)

CFP

25.

Red tide toxins mainly accumulate in:

a)

Finfish muscle

b)

Shellfish digestive glands

c)

Seagrasses

d)

Seaweeds

26.

Which organism causes eutrophication when excessive?

a)

Zooplankton

b)

Phytoplankton

c)

Benthos

d)

Nekton

27.

Shrimp escape response using tail-flip involves the:

a)

Antennae

b)

Telson

c)

Rostrum

d)

Chelipeds

28.

The rostrum of shrimp mainly functions as:

a)

Sensory organ

b)

Protective spine

c)

Swimming appendage

d)

Feeding structure

29.

Which tilapia species is most widely cultured worldwide?

a)

O. aureus

b)

O. mossambicus

c)

O. niloticus

d)

Sarotherodon sp.

30.

Which fish health practice prevents disease entry?

a)

Chemotherapy

b)

Vaccination

c)

Biosecurity

d)

Quarantine treatment

31.

Which fish health practice prevents disease entry?

a)

Chemotherapy

b)

Vaccination

c)

Biosecurity

d)

Quarantine treatment

32.

Milkfish exhibit a behavior of swimming against the current during harvesting. This behavior is known as:

a)

Rheotaxis

b)

Phototaxis

c)

Chemotaxis

d)

Geotaxis

33.

Which environmental factor is primarily corrected by liming acidic ponds?

a)

Dissolved oxygen

b)

Soil pH

c)

Salinity

d)

Temperature

34.

Which seaweed is the main source of carrageenan?

a)

Gracilaria

b)

Kappaphycus

c)

Sargassum

d)

Ulva

35.

Which seaweed is commonly processed into gulaman?

a)

Kappaphycus

b)

Eucheuma

c)

Gracilaria

d)

Caulerpa

36.

Which shellfish poisoning is associated with memory loss?

a)

PSP

b)

NSP

c)

ASP

d)

DSP

37.

The toxin responsible for Amnesic Shellfish Poisoning (ASP) is:

a)

Saxitoxin

b)

Brevetoxin

c)

Domoic acid

d)

Ciguatoxin

38.

Which nutrient primarily causes eutrophication when present in excess?

a)

Calcium

b)

Potassium

c)

Nitrogen and phosphorus

d)

Magnesium

39.

Which structure allows shrimp to quickly swim backward to escape predators?

a)

Antennae

b)

Chelipeds

c)

Telson

d)

Rostrum

40.

Which fertilizer contains both nitrogen and phosphorus but no potassium?

a)

Urea

b)

Complete fertilizer

c)

Monoammonium phosphate

d)

Ammonium sulfate

41.

Which carp species is known as silver carp?

a)

Cyprinus carpio

b)

Aristichthys nobilis

c)

Hypophthalmichthys molitrix

d)

Ctenopharyngodon idella

42.

Which characteristic is typical of healthy fingerlings for stocking?

a)

Erratic swimming

b)

Visible lesions

c)

Uniform size

d)

Discoloration

43.

Which carp species is known as bighead carp?

a)

Hypophthalmichthys molitrix

b)

Aristichthys nobilis

c)

Cyprinus carpio

d)

Ctenopharyngodon idella

44.

Which anti-nutritional factor binds minerals and reduces their absorption?

a)

Cyanogens

b)

Gossypol

c)

Phytic acid

d)

Mimosine

45.

The primary goal of biosecurity in aquaculture is to:

a)

Increase growth rate

b)

Reduce production cost

c)

Prevent disease introduction and spread

d)

Improve water clarity

46.

Which method is used to identify individual broodstock using electronic readers?

a)

Branding

b)

Fin clipping

c)

PIT tagging

d)

Dye injection

47.

Which local name refers to freshwater prawn (Macrobrachium)?

a)

Urang

b)

Bangus

c)

Dalag

d)

Lapulapu

48.

Which shrimp maturation technique involves removal of endocrine control?

a)

Pinching

b)

Ligation

c)

Eyestalk ablation

d)

Cauterization

49.

Which organism group is directly increased by pond fertilization?

a)

Benthos

b)

Nekton

c)

Phytoplankton

d)

Periphyton predators

50.

Which carp species feeds mainly on aquatic vegetation?

a)

Silver carp

b)

Bighead carp

c)

Grass carp

d)

Common carp

51.

Which condition commonly results from severe eutrophication?

a)

Increased salinity

b)

Hypoxia

c)

Higher alkalinity

d)

Clear water

52.

Which fish behavior is exploited in tidal harvesting methods?

a)

Territoriality

b)

Schooling

c)

Rheotaxis

d)

Cannibalism

53.

Which marine mammal feeds almost exclusively on seagrass?

a)

Dolphin

b)

Dugong

c)

Seal

d)

Whale shark

54.

Which shellfish poisoning primarily affects the nervous system but is non-fatal?

a)

PSP

b)

NSP

c)

ASP

d)

DSP

55.

Which practice helps ensure better survival during fish stocking?

a)

Stocking mixed sizes

b)

Stocking stressed fish

c)

Stocking during extreme temperatures

d)

Stocking healthy, active fish

56.

Which fertilizer grade represents complete fertilizer?

a)

46-0-0

b)

21-0-0

c)

16-20-0

d)

14-14-14

57.

Which shrimp body part mainly functions as a sensory organ?

a)

Telson

b)

Antennae

c)

Rostrum

d)

Abdomen

58.

Which shellfish toxin blocks sodium channels and causes paralysis?

a)

Domoic acid

b)

Ciguatoxin

c)

Brevetoxin

d)

Saxitoxin

59.

Which aquaculture practice aims to minimize chemical treatments?

a)

Chemotherapy

b)

Vaccination

c)

Biosecurity

d)

Hormonal induction

60.

Which pond condition favors natural food production?

a)

Clear water

b)

Sterile bottom

c)

Slightly green water

d)

High turbidity

61.

Which indicator best shows poor water quality in ponds?

a)

Active fish feeding

b)

Uniform fish size

c)

Fish gasping at surface

d)

Moderate algal growth