Population Genetic Structure of Endemic and Endangered Yellow Catfish, Horabagrus brachysoma, Using Allozyme Markers

Abstract

The allozyme variation and population genetic structure of Horabagrus brachysoma in three natural populations from the southern part of the Western Ghats region, India, were investigated by polyacrylamide gel electrophoresis. Variations at 14 loci from 14 enzyme systems were analyzed. The allozyme analysis revealed a high level of genetic variation in this species, with an average of observed alleles per locus of 2.357 and observed heterozygosity of 0.178. The positive value of the fixation index (F IS = 0.507) implied a significant deficiency of heterozygosity at the population level. The highly significant probability (P < 0.0001) for the overall loci suggested that the three sample sets were not part of the same gene pool.

Development and Characterization of RAPD and Microsatellite Markers for Genetic Variation Analysis in the Critically Endangered Yellow Catfish Horabagrus nigricollaris (Teleostei: Horabagridae)

“…Tribes and forest-dwelling communities along the basin are also highly dependent on the native species for their livelihoods. Destructive fishing practices are a serious concern in this river (Muneer et al 2007).…”

“…Lack of definite information on the genetic make-up or stock of fish fauna of a river system is impeding the planning and implementation of proper conservation and management strategies. We have reported the stock structure and genetic variation in another species of the genus (H. brachysoma) from different populations using allozymes, RAPD, and microsatellite markers (Muneer et al 2007(Muneer et al , 2008(Muneer et al , 2009), but information on the life history traits, stock structure, and basic genetic profile of H. nigricollaris is lacking.…”

Reproductive biology of the golden catfish,Horabagrus brachysoma(Günther, 1864), an endemic species of the Western Ghats, India

“…Studies pertaining to lengthweight relationship (Sunilkumar et al, 1999;Anvar et al, 2008), food and feeding (Sreeraj et al, 2006;Padmakumar et al, 2009), population genetics (Muneer et al, 2007), thermal tolerance (Dalvi et al, 2009) and seed production (Bindu and Padmakumar, 2008) of H. brachysoma have been reported. Controlled breeding and culture of a particular species is linked to its critical life history parameters such as food and feeding, fecundity, reproductive period (through the gonadosomatic index), oocyte size distribution and other parameters.…”

“…Controlled breeding and culture of a particular species is linked to its critical life history parameters such as food and feeding, fecundity, reproductive period (through the gonadosomatic index), oocyte size distribution and other parameters. Studies pertaining to lengthweight relationship (Sunilkumar et al, 1999;Anvar et al, 2008), food and feeding (Sreeraj et al, 2006;Padmakumar et al, 2009), population genetics (Muneer et al, 2007), thermal tolerance (Dalvi et al, 2009) and seed production (Bindu and Padmakumar, 2008) of H. brachysoma have been reported. Despite some reports (Kurian and Inasu, 2003;Padmakumar et al, 2004), a detailed study on the reproductive biology of this species in particular is missing from the high biodiversity area of the Western Ghats.…”