Fisheries Questions in English

(A) Crustacean fishery refers to the commercial harvesting and cultivation of crustaceans,which are a subphylum of arthropods. $Lobster$,$Prawn$,and $Crab$ are common examples of crustaceans. Among the given options,$Lobster$ and $Prawn$ are the primary organisms involved in crustacean fisheries.

(C) An exotic species is a species that is not native to a particular region. Among the given options,$Cyprinus$ (specifically $Cyprinus$ $carpio$,the common carp) is an exotic fish species that was introduced into Indian waters for aquaculture purposes. $Clarias$ (catfish) and $Labeo$ (rohu/labio) are indigenous to India. $Daphnia$ is a genus of small planktonic crustaceans,not a fish.

(C) The fish commonly known as the ‘oil sardine’ is $Sardinella \ longiceps$.
It is a commercially important species of fish found in the Indian Ocean,particularly along the coast of India,and is known for its high oil content.

(B) Salmon is an anadromous fish,which means it migrates from the ocean to freshwater rivers to spawn.
This migratory behavior is a characteristic feature of the life cycle of salmon species.

(B) $Wallago \ attu$ is commonly known as a catfish. It possesses very small eyes and well-developed sensory barbels,which help it navigate and find food in its environment.

(B) The correct combination for composite fish farming in India is $Catla$,$Labeo$,and $Cirrhinus$.
These are freshwater fishes that occupy different niches in the pond,allowing for efficient utilization of available food resources.
$Catla$ is a surface feeder,$Labeo$ (Rohu) is a column feeder,and $Cirrhinus$ (Mrigal) is a bottom feeder.
This combination is widely recommended for maximizing fish production in aquaculture.

(D) The term 'Fisheries' is a broad industry that involves the catching,processing,and selling of fish,shellfish,and other aquatic organisms. It encompasses the management and exploitation of both marine (saltwater) and freshwater fish resources. Therefore,it is not limited to just one type of water body but includes all aquatic animal resources harvested for human use.

(D) Induced breeding is a technique used to stimulate fish to spawn in captivity by injecting hormones. This process is highly effective and widely used in $Pisciculture$ (fish farming) to increase the production of fish seeds. It allows for the controlled breeding of fish species that do not naturally spawn in confined environments.

(C) The rearing,breeding,and management of fishes for commercial purposes,such as obtaining meat and oil,is termed as pisciculture.

(A) Freshwater fishes that are commonly consumed and have high nutritional value include $Rohu$ ($Labeo$ $rohita$),$Catla$ ($Catla$ $catla$),$Clarias$ $(Magur)$,and $Mystus$.
$Rohu$ and $Catla$ are the most popular edible freshwater fishes in India.
$Clarias$ and $Mystus$ are also widely consumed freshwater species.
$Hilsa$ is an anadromous fish (migrates from sea to freshwater for spawning),and $Salmon$ is primarily a marine fish,though some species are anadromous.

(D) An estuary is a coastal body of water where freshwater from rivers or streams meets and mixes with saltwater from the ocean.
Estuarine fish culture involves the rearing of fish species that are adapted to these brackish water conditions.
Therefore,it is the culture of fish in an aquatic medium where fresh and marine water get mixed together.

(A) Estuarine fish culture involves the rearing of fish in estuaries, which are areas where freshwater from rivers meets the saltwater of the ocean.
$Hilsa$ (specifically $Tenualosa$ $ilisha$) and $Liza$ (mullet species) are well-known examples of fish that thrive in estuarine environments.
$Rohu$, $Catla$, and $Wallago$ are primarily freshwater fish species.
Therefore, the correct option is $A$.

(D) Catla $(Catla \, catla)$, singhara $(Mystus \, seenghala)$, magur $(Clarias \, batrachus)$, and sindhi fishes are widely distributed across various freshwater bodies in India. These species are commonly cultured and consumed throughout the country, making them available in most regions of India. Therefore, they are found all over India.

(B) $Catla$ is a fresh-water and the largest Indian carp distributed throughout India.
It is considered an excellent food fish due to its high nutritional value and pleasant flavor.

(A) Induced breeding is a technique used to stimulate fish to spawn in captivity by using hormonal injections or environmental manipulation.
This technique is a fundamental practice in $Pisciculture$ (fish farming) to ensure the production of fish seeds in artificial reservoirs,ponds,and tanks.
Therefore,induced breeding is effective and primarily utilized in $Pisciculture$.

(C) Isinglass is a high-grade collagen substance obtained from the dried air bladder (or swim bladder) of certain fishes,such as catfishes and carps.
It is primarily used as a clarifying agent in the production of beer and wine.

(C) Isinglass is a form of collagen obtained from the dried swim bladders of fish,particularly sturgeon.
It is primarily used as a fining agent for the clarification of alcoholic beverages like wine,beer,and vinegar by removing suspended particles.
Additionally,it is used in the manufacturing of specialized glues,such as those used for bookbinding and ribbons.

(C) Induced breeding or hypophysation is a technique used in aquaculture to stimulate fish to spawn.
This process involves the injection of pituitary gland extract into the body of the fish.
The pituitary gland contains gonadotropic hormones ($FSH$ and $LH$) which stimulate the gonads (ovaries and testes) to mature and release gametes.
Therefore,the correct method is the injection of pituitary extract into the body.

(D) Aquaculture is the farming of aquatic organisms,including fish,mollusks,crustaceans,and aquatic plants. It involves the cultivation of these organisms in controlled aquatic environments. It encompasses both marine fisheries (mariculture) and inland fisheries (freshwater aquaculture). Therefore,the term includes both $(b)$ and $(c)$.

(D) In India, fisheries are a major industry. The most commonly cultured freshwater fish species include Catla $(Catla \, catla)$, Rohu $(Labeo \, rohita)$, and Mrigal $(Cirrhinus \, mrigala)$. These are collectively known as Indian Major Carps. Among the given options, Rohu and Catla are the most appropriate examples of fish cultured in India.

(A) The common freshwater fishes are Catla,Rohu,and Common Carp.
$Mackerel$,$Pomfret$,and $Hilsa$ are examples of marine fishes.
Therefore,$Catla$ is the correct answer.

(A) Induced breeding is a technique used in $Fisheries$ (specifically in $Pisciculture$) to stimulate fish to spawn in captivity.
This is achieved by injecting hormones (like pituitary extracts or synthetic analogues) into the fish to overcome the environmental barriers that prevent them from breeding in confined conditions.
This method ensures the availability of quality fish seeds for aquaculture.

(C) Inland fisheries refers to the practice of rearing and catching fish in freshwater bodies such as rivers,lakes,ponds,and reservoirs.
Unlike marine fisheries,which involve fishing in oceans and seas,inland fisheries are restricted to freshwater ecosystems.
Therefore,the correct option is $C$.

(A) Fisheries is an industry devoted to the catching,processing,or selling of fish,shellfish,or other aquatic animals. It involves the rearing,catching,and selling of fishes,molluscs (shellfish),and crustaceans (prawns,crabs,etc.). Therefore,the primary focus of fisheries is the production and rearing of fishes.

(D) Marine fisheries include the cultivation and harvesting of fishes that live in saltwater environments.
Common examples of edible marine fishes include $Mackerel$,$Pomfret$,$Sardine$,$Hilsa$,and $Tuna$.
Since all the options listed ($Mackerel$,$Pomfret$,and $Sardine$) are well-known marine fishes,the correct answer is $D$.

(B) Freshwater fish are those that spend some or all of their lives in fresh water, such as rivers and lakes, with a salinity of less than $0.05\%$.
$1$. $Rohu$ ($Labeo$ $rohita$) is a well-known freshwater fish.
$2$. $Pomfret$, $Sardine$, and $Salmon$ are primarily marine fish, although some species of $Salmon$ are anadromous (migrating between salt and fresh water).

(D) The fish species $Clarias$ $gariepinus$ (African Catfish) is an exotic species that was introduced into India from abroad. It is often considered an invasive species because it can outcompete native fish species for resources and may disrupt local aquatic ecosystems. Other options like $Labeo$ $rohita$ (Rohu), $Mystus$ $seenghala$, and $Clarias$ $batrachus$ (Magur) are native to Indian water bodies.

(C) Pisciculture is the controlled breeding,rearing,and management of fish. It is a branch of aquaculture focused specifically on the production of fish for food or other commercial purposes. Therefore,the correct option is $C$.

(B) The edible fishes are categorized into freshwater and marine fishes.
$1$. Freshwater fishes include $Catla$, $Rohu$, and $Common \text{ } carp$ (Mrigal is also a freshwater fish).
$2$. Marine fishes include $Hilsa$, $Sardines$, $Mackerel$, and $Pomfrets$.
Therefore, $Mackerel$ is a marine edible fish.

(D) Major carps are freshwater fishes that are economically important and widely cultured in India.
Commonly known major carps include Catla (Catla catla),Rohu (Labeo rohita),and Mrigal (Cirrhinus mrigala).
Sardine,Hilsa,and Pomfret are marine fishes.
Therefore,the correct combination is $(i), (ii),$ and $(vi)$.

(B) $(i)$ Modern techniques are indeed used to increase production in marine habitats (mariculture). This statement is correct.
$(ii)$ $Catla$,$Rohu$,and $Mrigal$ are freshwater major carps,but $Hilsa$ is a marine fish. This statement is incorrect.
$(iii)$ $Rohu$ and $Mrigal$ are freshwater fishes,not marine. This statement is incorrect.
$(iv)$ Fisheries are classified into capture fisheries and culture fisheries,which can be either marine or freshwater. This statement is correct.
Therefore,statements $(i)$ and $(iv)$ are correct.

(C) According to the $NCERT$ biology textbook,fisheries are an industry devoted to the catching,processing,or selling of fish,shellfish,or other aquatic animals. $A$ large number of our human population is dependent on fish,fish products,and other aquatic animals such as prawn,crab,lobster,edible oyster,etc.,for food. Some of the freshwater fishes which are very common include Catla,Rohu,and Common carp. Some of the marine fishes that are eaten include Hilsa,Sardines,Mackerel,and Pomfrets. It is estimated that approximately $90\%$ of the world's fish production comes from the sea (marine environment).

(D) Marine edible fishes are those that live in saltwater environments and are consumed as food.
$1$. Catla,Rohu,Mrigal,and Common carp are freshwater fishes.
$2$. Hilsa,Mackerel,Sardine,and Pomfret are common examples of marine edible fishes.
Therefore,the correct group is Sardine,Hilsa,Mackerel,and Pomfret.

(A) According to the $NCERT$ biology textbook,in many developing countries,millions of people depend on the fishing industry for their livelihood. Specifically,it is estimated that $500$ million people depend directly or indirectly on the fishing industry for their food and income.

(A) $Hilsa$ (scientific name: $Tenualosa$ $ilisha$) is a popular and commercially important species of fish belonging to the family $Clupeidae$. It is an anadromous fish, meaning it migrates from the sea to freshwater rivers to spawn. It is widely consumed in South Asia, particularly in India and Bangladesh.

(C) Fisheries is an industry devoted to the catching,processing,or selling of fish,shellfish,or other aquatic animals. It involves the organization of fish and fishermen in a specific area for the purpose of harvesting aquatic resources.
$A$. Mangroves are salt-tolerant forest ecosystems.
$B$. Mackerel is a common name for several species of pelagic fish.
$D$. Apiculture is the maintenance of honey bee colonies,commonly in hives,by humans.

(D) Fisheries is a major industry in India. It involves the catching,processing,and selling of fish,shellfish,and other aquatic animals. India has a vast coastline and numerous inland water bodies,making fisheries a vital sector for food security,employment,and export revenue.

(B) People living in coastal areas have easy access to oceans and seas. Consequently, they rely heavily on $Fishery$ $products$ (fish, mollusks, and crustaceans) as their primary source of protein and food. This is a traditional and sustainable practice in coastal regions worldwide.

(B) The common freshwater fishes are $Rohu$,$Catla$,and $Mrigal$.
$Sardine$ is a marine fish.
Therefore,the correct option is $B$.

(C) Fisheries involve the catching, processing, or selling of fish, shellfish, or other aquatic animals. The $Sea$ (marine water) is the largest and most significant source of fishery products globally, providing a vast variety of fish and other aquatic organisms for human consumption and industrial use.

(A) The common freshwater fishes used in aquaculture are the major carps, which include $Catla$ $(Catla \, catla)$, $Rohu$ $(Labeo \, rohita)$, and $Mrigal$ $(Cirrhinus \, mrigala)$.
$Sardine$, $Mackerel$, $Pomfret$, and $Hilsa$ are examples of marine fishes.

(D) Fisheries is an industry devoted to the catching,processing,or selling of fish,shellfish,or other aquatic animals.
It encompasses the entire value chain from harvesting aquatic organisms to their commercial distribution and processing.
Therefore,all the given options are correct.

(D) The fish species $Catla$,$Rohu$,and $Mrigal$ are common freshwater edible fish in India. $Hilsa$ (Tenualosa ilisha) is an anadromous fish,meaning it lives in the sea (marine water) and migrates to freshwater rivers for spawning. Therefore,$Hilsa$ is not considered a typical freshwater fish.

(C) The fish species are categorized into marine and freshwater fish.
$1$. Sardine, Pomfret, and Hilsa are common marine food fishes.
$2$. Catla $(Catla \, catla)$, Rohu, and Common Carp are well-known freshwater food fishes.
Therefore, Catla is a freshwater edible fish.

(A) Hilsa $(Tenualosa \text{ } ilisha)$ is a very popular and economically important species of fish. It is an anadromous fish, meaning it migrates from the sea to freshwater rivers for spawning. It is widely consumed in South Asia, particularly in India and Bangladesh.

(C) Fisheries include the rearing,catching,and selling of fish,mollusks,and crustaceans. Marine fisheries are the most significant source of fishery products globally,contributing the largest share of the total fish catch compared to inland fisheries (rivers,lakes,and ponds).

(A) The coastline of Gujarat is the longest in India,measuring approximately $1600\, km$ in length. This extensive coastline plays a significant role in the state's fisheries and maritime trade.

(B) In India,while agriculture and dairy farming have received significant focus and technological advancement,the fisheries sector has historically received less attention regarding infrastructure,modern technology,and systematic development compared to many other nations. Therefore,$B$ is the correct option.

(D) Fisheries is an industry devoted to the catching,processing,or selling of fish,shellfish,or other aquatic animals.
$A$. Apiculture refers to the maintenance of hives of honeybees for the production of honey.
$B$. Marine industry is a broad term not specifically limited to aquatic food production.
$C$. Aquaculture is the farming of aquatic organisms including fish,molluscs,crustaceans,and aquatic plants.
$D$. Fisheries specifically encompasses the catching,processing,and selling of aquatic animals.

(D) People living in coastal areas are geographically situated near oceans or seas. Due to the abundance of aquatic life in these regions,their primary source of food and livelihood is derived from the sea. Fisheries involve the catching,processing,or selling of fish,shellfish,or other aquatic animals. Therefore,they mainly depend on fisheries for their food requirements.