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Freshwater fish are fish species that spend some or all of their lives in bodies of fresh water such as rivers, lakes, ponds and inland wetlands, where the salinity is less than 1.05%. These environments differ from marine habitats in many ways, especially the difference in levels of osmolarity .
Some fish, such as salmon and some species of shark, are able to travel between the freshwater and saltwater environments, linking the two. [11] These fish are referred to as diadromous fish, stemming from Greek and meaning "to run between", in reference to the fish running between freshwater and saltwater. [12]
The freshwater drum, Aplodinotus grunniens, is a fish endemic to North and Central America. It is the only species in the genus Aplodinotus , [ 3 ] and is a member of the family Sciaenidae . It is the only North American member of the group that inhabits freshwater for its entire life. [ 4 ]
These fish can be found in freshwater all over the world, and are known to inhabit the Great Lake region, in particular Lake Erie. These fish inhabit bodies of water where vegetation and debris is readily accessible. [15] [16] [17] In the spring when the perch chooses to spawn, they use vegetation to conceal their eggs from predators. [18]
There are 28 freshwater lakes with an area greater than 5,000 square kilometres, totalling 1.18 million square kilometres or 79 percent of the total. [46] Freshwater fisheries are essential to supporting human life around the globe whether they are used for recreation or commercial use.
The increase in the world population and the increase in per capita water use puts increasing strains on the finite resources availability of clean fresh water. The response by freshwater ecosystems to a changing climate can be described in terms of three interrelated components: water quality, water quantity or volume, and water timing. A ...
In cross section, the fish is compressed and the dorsal head profile clearly concave. The single dorsal and ventral fins have spines and soft rays; the paired pectoral and pelvic fins have soft rays only; and the caudal fin has soft rays and is truncated and rounded. Barramundi are salt and freshwater sportfish, targeted by many.
Bait fish – are small fish caught for use as bait to attract large predatory fish. See forage fish.; Bathypelagic – the open ocean or pelagic zone that extends from a depth of 1000 to 4000 meters below the ocean surface.
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