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Vol. 48 No. 6, 2009
Reproductive Biology of the Sergestid Shrimp Acetes indicus (Decapoda: Sergestidae) in Coastal Waters of Malacca, Peninsular Malaysia
Sarker Mohammad Nurul Amin1,2,*, Aziz Arshad1,3, Japar Sidik Bujang4, Siti Shapor Siraj4, and Stephen Goddard5
1Laboratory
of Marine Science and Aquaculture, Institute of Bioscience, Universiti
Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
2Institute of Marine Sciences and Fisheries, University of Chittagong, Chittagong-4331, Bangladesh
3Department of Aquaculture, Faculty of Agriculture, Universiti Putra Malaysia, 43400 UPM Serdang, Selangor, Malaysia
4Department
of Animal Science and Fishery, Faculty of Agriculture and Food
Sciences, Universiti Putra Malaysia, Bintulu Campus, 89007 Bintulu
Sarawak, Malaysia
5Department of Marine Science and Fisheries, Sultan Qaboos University, Oman
Sarker Mohammad Nurul Amin, Aziz Arshad, Japar Sidik Bujang, Siti Shapor Siraj, and Stephen Goddard (2009) The sex ratio, maturity, and spawning season of the sergestid shrimp Acetes indicus
were determined by analyzing samples collected from coastal waters of
Klebang Besar, Malacca between Apr. 2006 and Mar. 2007. The
overall annual sex ratio of A. indicus
was found to be 1: 2.10 (males: females). The annual variation in
the gonadosomatic index (GSI) showed continuous breeding of A. indicus throughout the year. The size at sexual maturity of female A. indicus
was 23 mm TL. No females with spent ovaries were found among the
samples during the study period. The estimated mean fecundity of A. indicus was 1666.30 ± 262.10 (range, 1135-2235) eggs. The mean monthly GSI in females showed positive and significant (p < 0.05) correlations with conductivity (r = 0.67), salinity (r = 0.65), and total suspended solids (r = 0.59). However, no significant correlation (p > 0.05) was found for the mean monthly GSI with temperature or dissolved oxygen. This suggests that A. indicus may be adapted to a wide range of conditions in tropical and subtropical regions.
Key words: Maturity, Spawning season, Acetes indicus.
*Correspondence: E-mail:smnabd02@yahoo.com
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