- Bliv medlem
-
Du er ikke logget ind
Log ind Opret dig
Du er ikke logget ind
Beskrivelse
The book Fish and Fisheries comprises chapters which includes both ichthyology and fisheries. This is basically a reference book written in a lucid style and having very high standard of presentation. Generally, a fishery is an entry engaged in raising or harvesting fish which is determined by some authority to be a fishery. Included in this definition are the living hagfish, lampreys, and cartilaginous, and bony fish, as well as various extinct related groups, Most fish are ectothermic, allowing their body temperatures to vary as ambient temperature change, though some of the large active swimmers like while shark and tuna can hold a higher core temperature. Fish are abundant in most bodies of water. They can be found in nearly all aquatic environments, from high mountain streams to the abyssal and even hadal depths of the deepest ocean. At 32000 species, fish exhibit greater species diversity than other group of vertebrates.