Gourt > Science > Environment > Biodiversity > Conservation > Fish (3)
A fish is a water-dwelling vertebrate with gills. Most are cold-blooded. There are over 29,000 species of fish, making them the most diverse group of vertebrates. Taxonomically, fish are a paraphyletic group whose exact relationships are much debated; a common division is into the jawless fish (class Agnatha, 75 species including lampreys and hagfish), the cartilaginous fish (class Chondrichthyes, 800 species including sharks and rays), with the remainder classed as bony fish (class Osteichthyes).
Fish come in different sizes, from the 16 m (51 ft) whale shark to a 8 mm (just over ¼ of an inch) long stout infantfish. Many types of aquatic animals named "fish", such as jellyfish and cuttlefish, are not true fish. Other sea dwelling creatures, like dolphins, while closely resembling fish in outer appearance, are actually mammals.
Although most fish are exclusively aquatic and cold-blooded, there are exceptions to both cases. Fish from a number of different groups have evolved the capacity to live out of the water for extended periods of time. Of these amphibious fish some such as the mudskipper can live and move about on land for up to several days. Also, certain species of fish maintain elevated body temperatures to varying degrees. Endothermic teleosts (bony fishes) are all in the suborder Scombroidei and include the billfishes, tunas, and one species of "primitive" mackerel (Gasterochisma melampus). All sharks in the family Lamnidae – shortfin mako, long fin mako, white, porbeagle, and salmon shark – are known to have the capacity for endothermy, and evidence suggests the trait exists in family Alopiidae (thresher sharks). The degree of endothermy varies from the billfish, which warm only their eyes and brain, to bluefin tuna and porbeagle sharks who maintain body temperatures elevated in excess of 20 °C above ambient water temperatures. See also gigantothermy. Endothermy, though metabolically costly, is thought to provide advantages such as increased contractile force of muscles, higher rates of central nervous system processing, and higher rates of digestion.
More on [ Fish ]
Fisheries Science :: Aquatic Ecology
Fish :: Chordata
Hvng my super late lunch at imm! Fried fish soup noodle!! Macam biasakkk
suefbellish (suefbellish) Sun, 20 Dec 2009 09:55:34 -0000
Hvng my super late lunch at imm! Fried fish soup noodle!! Macam biasakkk
<º))))><.·´¯`·.| its a fish!
heyheyybonaann (bon ann ) Sun, 20 Dec 2009 09:54:59 -0000
<º))))><.·´¯`·.| its a fish!
Oh shit my $5 Manhattan Fish Market voucher expired by 3 days. What is this man?!
Zilei (Hung Zi Lei) Sun, 20 Dec 2009 09:54:51 -0000
Oh shit my $5 Manhattan Fish Market voucher expired by 3 days. What is this man?!
fish surgery
Dobbsisazombie (Dobbsisazombie) Sun, 20 Dec 2009 09:54:02 -0000
fish surgery
Free Stuff (Southcenter mall): I have several bottels Health products, fish oil omega 3 1,000 mg 180 soft gels,st. ... http://bit.ly/7OkiS6
FreeListSeattle (Free List: Seattle) Sun, 20 Dec 2009 09:53:03 -0000
Free Stuff (Southcenter mall): I have several bottels Health products, fish oil omega 3 1,000 mg 180 soft gels,st. ... http://bit.ly/7OkiS6
Newly designed: Eat Sleep Fish Magnet - http://bit.ly///8I8BGR - #holiday #xmas
EatSleep2010 (Eat Sleep..) Sun, 20 Dec 2009 09:52:42 -0000
Newly designed: Eat Sleep Fish Magnet - http://bit.ly///8I8BGR - #holiday #xmas
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Atlantic Salmon Federation - Information about the Atlantic Salmon, the threats to its survival, research being undertaken, the journal produced by the society and membership.
Meta Description: [ The Atlantic Salmon Federation is the world leader in Atlantic salmon conservation, and in highlighting the Atlantic salmon fishing exerience ]
Columbia Kootenay Fisheries Renewal Partnership - Information about projects undertaken in British Columbia, Canada, involving the restoration and conservation of fish habitats.
Meta Description: [ The Columbia Kootenay Fisheries Renewal Partnership is dedicated to fish habitat
conservation and restoration in the Canadian Columbia River basin, the Kootenay region of British Columbia. ]
Fish Conservation - Working with professionals and communities to protect fish and fisheries.
Meta Description: [ Fisheries Conservation - Working with
professionals and communities to protect our fish and our fisheries ]
Fish Conservation - Streams, lakes, estuaries, bays and oceans exist in a fragile balance. If we are careful, understanding how removing animals will affect the ecosystem, these habitats can be enjoyed by us and our decendants.
Meta Description: [ A real world analysis of how to apply common sense and conservation to ethics in angling. ]
Marine Fish Conservation Network - The Marine Fish Conservation Network (Network) is a coalition of over 100 national and regional environmental organizations, commercial and recreational fishing groups and marine science groups dedicated to conserving marine fish and to promoting their long-term sustainability.
Meta Description: [ The Marine Fish Conservation Network (MFCN) is a coalition of over 150 national and regional environmental organizations, commercial and recreational fishing groups, aquariums, and marine science groups dedicated to conserving marine fish and to promoting their long-term sustainability. ]
Mart Gross Lab in Conservation Biology - University of Toronto group conducting research on protecting, maintaining, and restoring fish biodiversity. Publications, project and course descriptions, and links.
Native Fish Conservancy - A non-profit organization committed to conservation of native fishes of the midwestern United States.
Sea Fish Conservation Act, 1992. - Full text version.
Meta Description: [ This version of the Sea Fish (Conservation) Act 1992 is published under the authority and superintendence of the Queen's Printer of Acts of Parliament and Controller of HMSO. It has been prepared to reflect the text as it received Royal Assent. ]
Trout Unlimited - conservation organization for protecting North America's coldwater fisheries - Trout Unlimited is a private, non-profit organization who's mission is to conserve, protect and restore North America's trout and salmon fisheries and their watersheds.
Wild Salmon Center - Non-profit organization dedicated to dedicated to protecting Pacific salmon, steelhead, char, and trout stocks and their ecosystems in the northern Pacific rim.
Meta Description: [ The Wild Salmon Center (WSC) is a 501(c)(3) organization dedicated to conserving the last, best wild salmonid riverine habitat of the northern Pacific rim. ]
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