期刊
SAUDI JOURNAL OF BIOLOGICAL SCIENCES
卷 22, 期 6, 页码 698-705出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.sjbs.2015.08.005
关键词
Scylla olivacea; Mud crab; Natural diet; Pichavaram; Crustaceans
类别
资金
- Ministry of Environment and Forest (MoEn&F) Govt. of India [22-9/2008-CS-I]
Food and feeding habits of mud crab Scylla olivacea (Herbst, 1896) in Pichavaram mangroves was investigated quantitatively and qualitatively for a period of two years from June 2010 to May 2012. Gut contents from 1737 specimens comprising 843 males and 894 females in the size range between 45 mm and 148 mm were examined. Crustaceans form the predominant food item in a majority of size groups in terms of percentage wet weight and frequency of occurrence, while molluscs showed a preference in few size groups. The other dietary items includes fishes, detritus, mud and sand and miscellaneous. Gut content analysis revealed no significant variation between the quantities of food consumed by both sexes. Feeding intensity was higher in juveniles and subadults of both sexes than that of adults, revealing a greater preference to feed on fast moving prey such as crustaceans and fishes. The results of the present study indicate that S. olivacea in Pichavaram mangroves exhibited a clear preference for crustaceans. (C) 2015 The Authors. Production and hosting by Elsevier B.V. on behalf of King Saud University. This is an open access article under the CC BY-NC-ND license.
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