James, D B (2008) Indian Echinoderms their resources biodiversity zoogeography and conservation. In: Glimpses of Aquatic Biodiversity- Rajiv Gandhi Chair Special Publication. CUSAT, Kochi, pp. 120-132.
Echinoderms are an interesting groupof animals distributed only in the seas since they do not have osmoregulatory powers to adjust to lower salinities. They are truly stenohaline animals. At present there are 7000 living species.Their fossil history is well documented due to hard parts except in case of sea cucumbers. Nearly 13,000 species of fossils are known. They have two unique features among the invertebrates: an internal water vascular system which is operated hydraulically opening to the exterior by a perforated plate known as madreporite and the presence of tube-feet which are extension of water vascular system.
|Item Type:||Book Section|
|Uncontrolled Keywords:||Echinoderms; biodiversity; zoogeography; conservation|
|Divisions:||CMFRI-Cochin > Biodiversity|
|Depositing User:||Users 171 not found.|
|Date Deposited:||30 Oct 2010 06:11|
|Last Modified:||09 Sep 2015 15:28|
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