Fish species richness and diversity of an unmanaged fish pond, Nalbari, Assam

Autor: Hitesh Das
Rok vydání: 2011
Předmět:
Zdroj: Indian Journal of Applied Research. 4:37-38
ISSN: 2249-555X
2010-2011
DOI: 10.15373/2249555x/jan2014/12
Popis: Richness and diversity of fish species was studied during 2010-2011 in an unmanaged fish pond of Nalbari district, Assam, locally called as Tinikonia Pukhuri. The results of present study reveal the occurrence of 35 fish species belong to 6 orders, 12 families and 25 genera. Among these Cypriniformes contributes dominant order (43%) and Clupeiformes along with Cypridontiformes found as less dominant order (3%). INTRODUCTION Ichthyodiversity refers to the variety of fish species; depending on context and scale, it could refer to alleles or genotypes within fish population to species of life forms within a fish community and to species or life forms across aqua regimes (Burton et al., 1992). Fish constitutes half of the total number of vertebrates in the world (Shinde et al., 2009). In the Indian subcontinent, there are 2,500 species of freshwater fish species (Jayaram, 1999). There are a few reports on fisheries of lentic water bodies of Assam were documented. In this respect works of Dey (1981), Hazarika and Dutta, (1994), Sarma et al., (2007), Acharya et al., (2008), Bhuyan et al. (2009) are worth mentioning. But there is a scare of sufficient knowledge about fish diversity of lentic water ecosystems of Nalbari district, Assam. With this background, the present study was conducted to generate a primary survey on richness and diversity of ichthyofauna of a pond (Tinikonia Pukhuri) of Nalbari district. This is an unmanaged pond and the same is usually emendated by flood water in every monsoon season. MATERIALS AND METHODS Diversity of fish fauna was monitored during 2010-2011 in Tinikonia Pukhuri, an ancient pond of Nalbari district of Assam. It is a man made pond and situated in Nalbari Town (260 26/ 19.18// N, 910 25/ 50.29//). Sampling was done during four different seasons viz., pre-monsoon (March-May), monsoon (June-September), retreating monsoon (October-November) and winter (December-February) after Borthakur (1986). Fish specimens were collected with different types of fishing nets and were preserved in 10% formalin solution in separate jar. Small fishes were directly placed in the 10% formalin solution, while large sized fishes were given an incision in their abdomen and preserved. Identification of collected fish samples were done after Day (1878), Jayaram (1981), Talwar & Jhingran (1991), Nath & Dey (2000). The latest scientific names of the fish species were followed after the website http:// research.calacademy.org/research/ichthyology/catalog/SpeciesByFamily.asp. RESULTS AND DISCUSSION In total of 35 fish species belonging to 25 genera, 12 families and 6 orders have been recorded from the Tinikonia Pukhuri during study period. The fish species of this pond belong to following ordersOsteoglossiformes, Cypriniformes, Siluriformes, Perciformes, Synbranchiformes and Cyprinodontiformes. Out of these 35 species, 1 belong to family Notopteridae, followed by Cyprinidae (14), Cobitidae (1), Bagridae (3), Siluridae (2), Ambassidae (2), Anabantidae (1), Osphronemidae (3), Channidae (4), Gobiidae (1), Belonidae (1), Mastacembelidae, (2), Aplochelidae (1). Among these fish species Cypriniformes contributes highest (43%) and Clupeiformes with Cyprinodontiformes contribute lowest (3%) species composition respectively. According to the point of view of economic value 9 species were assessed for non-classified ornamental fish (NCOF), 19 for classified ornamental fish (COF), 5 for cultivable food fish (CFF) and 2 for non-cultivable food fish (NCFF). The list of fish species recorded from Tinikonia Pukhuri along with their economic values is depicted in Table-1. Table-1: An account of occurrence of fish species in Tinikonia Pukhuri with their and economic value Order Family Name of the species Economic Value Osteoglossiformes Notopteridae Notopterus notopterus (Pallas) NCOF Cypriniformes Cyprinidae Amblypharygodon mola (Hamilton) COF Catla catla (Hamilton) CFF Laubuca laubuca (Hamilton) COF Cirrhinus mrigala (Hamilton) CFF Devario devario (Hamilton) COF Danio rerio (Hamilton) COF Esomus danrica (Hamilton) COF
Databáze: OpenAIRE
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