Indian Journal of Geo-Marine Sciences Vol. 43(4), April 2014, pp. 646-654 Reproductive biology of Etroplus suratensis (Bloch) from the Vembanad wetland system, Kerala 1,2L Bindu* & 2K G Padmakumar 1,2Kerala Agricultural University, Regional Agricultural Research Station, Kumarakom Kerala, India - 686 566 1M S M College, Kayamkulam, Alappuzha, Pin – 686 566, Kerala, India *[E-mail:
[email protected]] Received 16 July 2012; revised 15 November 2012 In the present study, data on sex ratio, maturity, Gonadosomatic index, fecundity and oocyte distribution of the pearlspot, Etroplus suratensis, were evaluated. Samples were collected from the landings of Vembanad lake during 2002 - 2004. Male-female ratio was found to be 1:0.8. Maximum GSI in male and female was 1.45 and 4.43 respectively. L50 was 19.5 cm in case of males and 20.0 cm in case of females. Absolute fecundity, varied between 874 and 7554 with an average of 2748. Fish is an asynchronous spawner with different clutches of ova, varied between 0.25 to 2.75 mm. [Keywords: Etroplus suratensis, Biology, Fecundity, Asynchronous spawner] Introduction not only for evolving captive breeding protocols but Popularly known as Karimeen, E. suratensis is also for formulating sustainable conservation widely distributed in almost all the brackish and programs. freshwaters of peninsular India. It is essentially a brackish water fish that has become naturally Materials and Methods acclimatized to freshwaters. It is an economically Monthly samples were collected from gill nets and important food fish and is a delicacy that fetch a very scare line fishing during 2002-2004 from the landings high price.