FISHERY AND IMPORTANCE OF FISH

FISHERY IS THE ART of rearing and keeping of fishes for the purpose of consumption and industrial uses. understanding the place of fishery is key as it is a major component of balanced diet and human nutrients. fishery involve fishing in natural waters like aquatic habitat or the practice keeping fishpond.    Importance of fish farming, Fish farming is important to man in the following ways

importance of fishery and fishes

1. It is a source of fish for food. Fish is a good source of protein in human diets.
2. It makes good use of the land that would have otherwise .Milable for arable farming.
3. It serves as a source of employment for fish farmers,
4. It reduces the pressure of fishing in natural waters e.g. rivers, and lakes.
5. It serves as a source of income to fish farmers and traders. importance of agriculture here
6. Fish farming can lead to the improvement of natural fish stocks Likes, rivers etc. since the young ones can be raised in It heries and used for restocking, trips in the production of sports fish, ii Fish can be produced for use in industrial fishing.
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Classification of Fishes

there are several types of fish found across the world but each of the can only be found in certain habitat or biomes. so the following are some the ways Fishes can be classified accordingly

(a) Habitat, here habitat simply means the type of environment where it lives. these habitat can be marine habitat, estuarine habitat, or any type of aquatic home.
(b) Morphology. this type of classification has to do with the body nature of the fish.

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classification of fishes According to Habitat..

Habitat refers to the living environment of an organism. Fishes water. There are three kinds of water habitat HI which fishes are fresh water, salt water and estuarine
(a) Fresh water habitat: This refers to water which contains no salt. Such water is found in springs, rivers, ponds, lakes, etc.
Fishes that are found in fresh water habitat are called fresh water fishes .read more on fresh water fishes here Examples include electric fish, moon fish, cat fish as clarias and heterobranchus longifilis, gymnarchus niloticus, and tilapia spp.

(b) Salt water or marine habitat: this refers to water body that has salt taste. Its salt content is about 3% per volume of water. Such water can be found in seas and ocean. Fishes found in salt water or marine habitat are called salt water or marine fishes. Examples include shark, mackerels, herring, sardine, cod (stock fish)

(c) Estuarine habitat: this refers to water found in estuarine where rivers flow into the seas or ocean. Examples is the Niger Delta of Nigeria. That salt content of this habitat is in between the content of fresh water habitat and marine habitat.
Fishes may not permanently live in this kind of habitat as some do migrate from fresh water or from salt water into the estuaries and go back thereafter. An example of such fishes is mudfish.

classification of fishes According to morphology

This has to do with the form or structure of the fish. There are two categories in this class
(a) Nature of bone: Fishes can be classified according to the nature of body
(i) Bony fishes; These posses bony skeletons or hard bones. Examples include Tilapia, mudfish, catfish.
(ii) Cartilaginous fishes: These possess solid bones or what is called cartilage (Biscuit bone). Examples include shark; dogfish.

(b) Nature of body covering: Based on this, fishes can be classified into:
(i) Scaly fishes: These have their body, parts of their head and tail covered by scales which overlap, pointing towards the tail end of the fish. Example is the tilapia galilaeus
(ii) Non-scaly fishes- These have no scales. They have smooth shiny skins. Examples are dogfish, mudfish, mackerels.

Other Aquatic Food Organisms
There are many other organisms that live in water2. Molluscs such as river snail, periwinkle, oyster. They usually covered with shell and these shells serve some useful purposes to man, in addition to their meat.

3. Reptiles such as river snake, turtles, etc.

fishery and fishes

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