Variation of esterase banding pattern in some selected tissues of tiger shrimp with reference to malathion toxicity and allele frequency / [MS Thesis] Shrimps 23 595.388 VAR Thesis (MS )--Department of Zoology, University of Dhaka, Session : 2007-2008. Includes bibliographical references Dhaka : University of Dhaka, 2010. 2010. 2010 Text viii, 95 p. : eng