Fisheries Important 100 MCQ
The number of chambers in the heart of fishes is:
a) 1
b) 2
c) 3
d) 4
Answer: b) 2
The number of semicircular canals in Gnathostomes is:
a) 2
b) 3
c) 4
d) 5
Answer: b) 3
In Heteropneustes fossilis, the total number of barbels present is:
a) 2
b) 4
c) 6
d) 8
Answer: c) 6
Adaptive radiation in fishes started approximately how many million years ago?
a) 1200
b) 500
c) 1000
d) 1500
Answer: b) 500
The number of species of Osteichthyes (bony fishes) is approximately:
a) 10,000
b) 15,000
c) 20,000
d) 25,000
Answer: d) 25,000
The amount of protein in the live body weight of fish is:
a) 10-13%
b) 15-20%
c) 18-23%
d) 5-12%
Answer: b) 15-20%
In fish bodies, the share of minerals is:
a) 1-2%
b) 3-4%
c) 4-5%
d) 5-6%
Answer: a) 1-2%
Cartilaginous fishes belong to the class:
a) Placoderms
b) Acanthodians
c) Chondrichthyes
d) Osteichthyes
Answer: c) Chondrichthyes
The pH of vermiculture is kept at:
a) Near neutral
b) Alkaline
c) Acidic
d) Highly alkaline
Answer: a) Near neutral
If more than a single species of fish is cultured at a time, it is called:
a) Monoculture
b) Aquaculture
c) Polyculture
d) Mariculture
Answer: c) Polyculture
Pisciculture refers to the rearing and production of:
a) Fishes
b) Birds
c) Reptiles
d) Wool-yielding animals
Answer: a) Fishes
Induced breeding techniques are used in:
a) Marine fishery
b) Capture fishery
c) Culture fishery
d) Inland fishery
Answer: c) Culture fishery
Inland fisheries involve:
a) Deep-sea fishing
b) Capturing fishes from the sea coast
c) Raising and capturing fishes in freshwater
d) Oil extraction from fish
Answer: c) Raising and capturing fishes in freshwater
Isinglass is employed in:
a) Preparation of wines
b) Clearing of wines
c) Distillation of wines
d) Preservation of wines
Answer: b) Clearing of wines
Which state is the largest fish-producing state in India?
a) Gujarat
b) West Bengal
c) Andhra Pradesh
d) Maharashtra
Answer: c) Andhra Pradesh
What percentage of India’s GDP is contributed by the fisheries sector?
a) 1.05%
b) 2.5%
c) 0.5%
d) 1.8%
Answer: a) 1.05%
Which fish has the highest protein content?
a) Sardine
b) Mackerel
c) Catla
d) Tuna
Answer: d) Tuna
Which organization is responsible for promoting fish exports in India?
a) NFDB
b) FAIDF
c) MPEDA
d) CIFA
Answer: c) MPEDA
Which fish species is the state fish of Kerala?
a) Hilsa
b) Indian Featherback
c) Green Chromide
d) Mahanadi Mahseer
Answer: c) Green Chromide
Which of the following is a brackish water fish species?
a) Tuna
b) Mahseer
c) Hilsa
d) Mullet
Answer: d) Mullet
Which of the following is a freshwater fish?
a) Hilsa
b) Catla
c) Mackerel
d) Sardine
Answer: b) Catla
The process of breeding fish in controlled environments is known as:
a) Mariculture
b) Aquaculture
c) Pisciculture
d) Polyculture
Answer: c) Pisciculture
Which of the following is a major carp species commonly cultured in India?
a) Tilapia
b) Catfish
c) Rohu
d) Trout
Answer: c) Rohu
The term “brackish water” refers to:
a) Freshwater
b) Saltwater
c) A mixture of freshwater and saltwater
d) Stagnant water
Answer: c) A mixture of freshwater and saltwater
Which of the following is a method of fish preservation?
a) Smoking
b) Fermentation
c) Freezing
d) All of the above
Answer: d) All of the above
The primary purpose of a fish hatchery is to:
a) Catch wild fish
b) Breed and raise fish for stocking
c) Process fish for consumption
d) Study fish behavior in the wild
Answer: b) Breed and raise fish for stocking
Which of the following is a common method used to catch fish in large quantities?
a) Angling
b) Trawling
c) Spearfishing
d) Handpicking
Answer: b) Trawling
The term “bycatch” refers to:
a) Fish that are farmed in captivity
b) Non-target species caught during fishing
c) Fish that are released after being caught
d) Fish that are too small to be sold
Answer: b) Non-target species caught during fishing
Which of the following is a major challenge in sustainable fisheries management?
a) Overfishing
b) Habitat destruction
c) Climate change
d) All of the above
Answer: d) All of the above
The Exclusive Economic Zone (EEZ) of a country extends up to how many nautical miles from its coast?
a) 12
b) 24
c) 200
d) 500
Answer: c) 200
Which of the following is a catadromous fish?
a) Salmon
b) Eel
c) Trout
d) Tuna
Answer: b) Eel
The term “demersal” refers to fish that:
a) Live near the water surface
b) Inhabit the water column
c) Live near or on the sea floor
d) Migrate between freshwater and saltwater
Answer: c) Live near or on the sea floor
Which of the following is a common method for assessing fish population size?
a) Mark-recapture
b) Electrofishing
c) Sonar surveys
d) All of the above
Answer: d) All of the above
The primary purpose of a fish ladder is to:
a) Assist fish in bypassing obstacles like dams
b) Measure fish length
c) Trap fish for tagging
d) Provide shelter for fish
Answer: a) Assist fish in bypassing obstacles like dams
Which of the following is a non-native invasive fish species in many parts of the world?
a) Common carp (Cyprinus carpio)
b) Atlantic cod (Gadus morhua)
c) Bluefin tuna (Thunnus thynnus)
d) Rainbow trout (Oncorhynchus mykiss)
Answer: a) Common carp (Cyprinus carpio)
The term “anadromous” refers to fish that:
a) Live their entire lives in freshwater
b) Migrate from the sea to freshwater to spawn
c) Migrate from freshwater to the sea to spawn
d) Live their entire lives in saltwater
Answer: b) Migrate from the sea to freshwater to spawn
Which of the following is a major concern associated with fish farming (aquaculture)?
a) Habitat destruction
b) Disease transmission to wild populations
c) Water pollution
d) All of the above
Answer: d) All of the above
The swim bladder in fish primarily functions to:
a) Aid in digestion
b) Regulate buoyancy
c) Enhance reproductive success
d) Protect against predators
Answer: b) Regulate buoyancy
Which of the following is a method used to age fish?
a) Examining otoliths
b) Measuring body length
c) Counting fin rays
d) Observing coloration patterns
Answer: a) Examining otoliths
The term “bycatch” refers to:
a) Fish that are farmed in captivity
b) Non-target species caught during fishing
c) Fish that are released after being caught
d) Fish that are too small to be sold
Answer: b) Non-target species caught during fishing
Which of the following is a major carp species commonly cultured in India?
a) Tilapia
b) Catfish
c) Rohu
d) Trout
Answer: c) Rohu
The term “brackish water” refers to:
a) Freshwater
b) Saltwater
c) A mixture of freshwater and saltwater
d) Stagnant water
Answer: c) A mixture of freshwater and saltwater
Which of the following is a method of fish preservation?
a) Smoking
b) Fermentation
c) Freezing
d) All of the above
Answer: d) All of the above
The primary purpose of a fish hatchery is to:
a) Catch wild fish
b) Breed and raise fish for stocking
c) Process fish for consumption
d) Study fish behavior in the wild
Answer: b) Breed and raise fish for stocking
Which of the following is a common method used to catch fish in large quantities?
a) Angling
b) Trawling
c) Spearfishing
d) Handpicking
Answer: b) Trawling
The term “bycatch” refers to:
a) Fish that are farmed in captivity
b) Non-target species caught during fishing
c) Fish that are released after being caught
d) Fish that are too small to be sold
Answer: b) Non-target species caught during fishing
Which of the following is a major challenge in sustainable fisheries management?
a) Overfishing
b) Habitat destruction
c) Climate change
d) All of the above
Answer: d) All of the above
The Exclusive Economic Zone (EEZ) of a country extends up to how many nautical miles from its coast?
a) 12
b) 24
c) 200
d) 500
Answer: c) 200
Which of the following is a catadromous fish?
a) Salmon
b) Eel
c) Trout
d) Tuna
Answer: b) Eel
The term “demersal” refers to fish that:
a) Live near the water surface
b) Inhabit the water column
c) Live near or on the sea floor
d) Migrate between freshwater and saltwater
Answer: c) Live near or on the sea floor
Which of the following is a common method for assessing fish population size?
a) Mark-recapture
b) Electrofishing
c) Sonar surveys
d) All of the above
Answer: d) All of the above
The primary purpose of a fish ladder is to:
a) Assist fish in bypassing obstacles like dams
b) Measure fish length
c) Trap fish for tagging
d) Provide shelter for fish
Answer: a) Assist fish in bypassing obstacles like dams
Which of the following is a non-native invasive fish species in many parts of the world?
a) Common carp (Cyprinus carpio)
b) Atlantic cod (Gadus morhua)
c) Bluefin tuna (Thunnus thynnus)
d) Rainbow trout (Oncorhynchus mykiss)
Answer: a) Common carp (Cyprinus carpio)
The term “anadromous” refers to fish that:
a) Live their entire lives in freshwater
b) Migrate from the sea to freshwater to spawn
c) Migrate from freshwater to the sea to spawn
d) Live their entire lives in saltwater
Answer: b) Migrate from the sea to freshwater to spawn