Green Global
Foundation   Journal
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DIVERSITY, DISTRIBUTION AND ABUNDANCE OF BENTHOS IN MOURI RIVER, KHULNA, BANGLADESH (Pages : 19 - 23)

Abundances and distribution of macrobenthic organisms were studied in the Mouri river during January- March 2005. Twenty (20) different species were identified in the present investigation. Polychaeta dominated all over the river and represented by Nemalycastis indica, Nephthys oligobranchia, Dasybranchus caducus and Nereis lamellose. The population of Oligochaeta was represented by Nais simplex, Stylaria fossularis and Limnodrilus hoffmeisteri. Insecta population was represented by a single species Chironomus javanus. Bivalvea population represented by Lamellidens marginalis and Lamellidens jenkinsianus. Gastropoda dominated by Bellamya bengalensis, Pila globosa, Lymnea acuminate, Indoplanorbis exustus and Thiara granifera. Abundance of Oligochaeta is concentrated at station I, II and III. Organic pollution indicator Limnodrilus hoffmeisteri fairly dominated at station I, II and III. The maximum abundance of macrobenthic organisms recorded from station VI and minimum at the station I which was 630 and 1040 indv. m-2 sediment respectively. Shannon-Wiener index indicates the maximum pollution in the station I (1.20 ± 0.23) and minimum in the station VI (1.49 ± 0.753)Download