Lauk: Béda antarrépisi

'''Lauk''' mangrupa [[vertebrata]] poikilotermik (getih tiis) nu hirup di jero cai maké [[insang]]. Di dunya, lauk kabagi jadi leuwih ti 27 rébu [[spésiés]], nepi ka jadi golongan vertebrata nu loba rupana. Sacara taksonomis, lauk téh mangrupa hiji kelompok [[parafilétik]] nu hubungan di antarana paling mindeng dipadungdengkeun; babagian nu umum mah nyaéta jadi [[lauk tanpa rahang]] (kelas [[Agnatha]], 75 spésiés kaasup [[belut]] jeung ''[[hagfish]]''), [[lauk kartilagus]] (kelas [[Chondrichthyes]], aya 800 spésiés, kaasup [[hiu]]), sarta sésana dina kelas [[lauk ipis]] ([[Osteichthyes]]).

 

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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]].-->

* [http://www.aquaticcommunity.com Site with one of the largest fish databases in the world]

* [http://reelinthefish.net/interviews/jameskoliver.html Reelinthefish.net | Interview with Dr James K. Oliver, Reefbase Scientist]

* [http://hardrockforums.com/forums Saltwater & Freshwater Forums]

* [http://www.catfishbirddog.com/fish/ Help on raising Aquarium Fish]

* [http://www.fishdeals.com/ Aquarium Fish Education]

* [http://www.easyreefer.com/ Reef aquarium community and learning center]

* [http://www.fiberi.de German Educator in Fisheries, Specialist in Fancy Goldfish and Fishhealth, with Forum and large Picture-Gallery]

* [http://oriol.mine.nu/software/Fish/ Fish] Aquarium simulator for mac.

* [http://www.fishfriend.com/ The Aquarium Fish Tank Friend]

* [http://www.wildanimalsonline.com/fish/ Information about fish] - Wild Animals Online encyclopedia

 

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