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Notes on the Gracious Sea Urchin Tripneustes gratilla (Echinodermata: Echinoidea) in Pag-asa Island, Kalayaan, Palawan, Philippines

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27-35_Balisco 2015.pdf
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Research Article
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Author
Balisco, Rodulf Anthony T
Date
2015-07-01

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Abstract
The Gracious Sea Urchin Tripneustes gratilla is one of the most heavily exploited sea urchins in the Philippines. However, knowledge about its status in Palawan especially in Pag-asa Island, Kalayaan is wanting. The study was conducted to determine the size structure, population density and test diameter-weight relationship of T. gratilla in Pag-asa Island, Kalayaan. Transect surveys at the intertidal area of the island revealed an average density of 3,500 ind.ha-1. The test diameter ranged between 2.6 and 8.8 cm, and body weight ranged between 8 and 248 g. Other than T. gratilla, four other echinoid species were recorded but in very less number. While it appears that T. gratilla is under exploited in Pag-asa Island, policies affecting its sustainable utilization are suggested.
Journal
The Palawan Scientist
Volume
7
Page Range
27-35
Resource/Dataset Location
https://drive.google.com/file/d/0BzOzTYf_v1niV2NsNVpsenlSQ01PTC10Vm1aVHVwNmQwVklr/view
URI
http://hdl.handle.net/1834/17924
Collections
The Palawan Scientist

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