Reproductive biology of the endemic ornamental barb, Puntius pookodensis Anna Mercy and Eapen Jacob 2007, from the Western Ghats of India

Abstract

Puntius pookodensis is endemic to the Pookode Lake, Wayanad, northern Kerala,, which is a part of Western Ghats of India, a biodiversity hot spot. One hundred and twelve specimens collected from the Pookode Lake during 2007 were used to study the reproductive biology of the species. Six maturity stages could be identified in the females, based on external morphology and ova diameter distribution, examinded microscopically. Size at first maturity was 32.5 mm TL (30-35 mm) in male and 38.5 mm TL (35-40 mm) in female. Ovary showed asynchronous development. Oogenesis was studied using the standard histological procedures. The oocyte development was classified into nine different oogenic stages. P. pookodensis was found to be a multiple spawner with protracted spawning. Absolute fecundity ranged from 426-823 in fishes of size range 35-57 mm TL and 0.555 - 2.267 g body weight. The number and size of eggs were found to be directly proportional to the size and age of the fish, with fecundity showing positive linear relationship with the length and weight of the fish as well as ovary weight.