Finfish diversity in Coleroon estuary, Southeast coast of India

摘要

Present study was undertaken to record diversity, species richness and species evenness of finfishes in Coleroon Estuary from May 2012 to April 2013. A total of 59 species were recorded which belonged to 9 Orders, 26 Families and 30 Genera. Among them Mugil cephalus was found most dominant species (23.5%). Values of Shannon diversity index, Simpson richness and Pielou's evenness for three zones varied from 1.5 to 3.2, 0.7 to 0.9 and 0.6 to 0.9 respectively. Maximum diversity and richness were recorded during summer (3.2), (0.93) (June-2012) and the lowest during monsoon season (1.5), (0.73) (November-2012). Percentage wise catches of fishes were in the Order Perciformes (85.42%) followed by Clupeiformes (6.60%), Siluriformes (2.47%), Gonorhynchiformes (1.83%), Pleuronectiformes (1.20%), Elopiformes (1.15%), Scorpaeniformes (0.99%), Beloniformes (0.35%) and Anguilliformes (0.19%). Maximum catches were in order Perciformes 79,508 kg and minimum catches was in Anguilliformes 180 kg.