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Journal of Environmental Biology

pISSN: 0254-8704 ; eISSN: 2394-0379 ; CODEN: JEBIDP

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    Abstract - Issue Nov 2012, 33 (6)                                     Back


nstantaneous and historical temperature effects on a-pinene

Some ecological aspects and potential threats to an intertidal

gastropod, Umbonium vestiarium

 

Author Details

 

S. Sivadas

National Institute of Oceanography (CSIR), Biological Oceanography Division, Goa-403 004, India

B. Ingole

(Corresponding author)

National Institute of Oceanography (CSIR), Biological Oceanography Division, Goa-403 004, India

e-mail : baban@nio.org

A. Sen

Biology Department, Pennsylvania State Universities, University Park, PA 16802, USA

 

Publication Data

Paper received:

19 May 2011

 

Revised received:

16 September 2011

 

Re-revised received:

25 October 2011

 

Accepted:

16 November 2011

 

Abstract

Kalbadevi Bay in Ratgnairi has been identified as potential site for placer mining along the west coast of India. Since, U. vestiarium is a keystone species of the region; study on some ecological aspect was carried. The paper also discusses the possible impact of beach sand mining and other threats to this ecologically important gastropod. Seasonal sampling was carried in 2004-2005 at 13 transects by quadrate method. U. vestiarium was restricted to mid and low tide zone of Station 1-3 and 8-10 located at the north and south ends of the beach. Abundance was highest at Station 10 MT (16 to 12488 ind m-2). Based on the size-frequency, it may be considered that U. vestiarium like other tropical fauna recruit during monsoon.? Eleven different colour patterns of U. vestiarium were observed. However, average individual size was larger in the samples collected from the north (stn. 1-3) end of the beach. The fastidious nature and sporadic distribution of U. vestiarium make them vulnerable to natural and anthropogenic disturbance. ???

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Key words

Ecology, Mining inpact, Umbonium vestiarium, Polymorphism, Kalbadevi bay

 

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