Reproductive biology of Pethia ticto (Cyprinidae) from the Gorai River (SW Bangladesh)

• Published in: Journal of applied ichthyology Vol. 33; no. 5; pp. 1007 - 1014
• Main Authors: Hossain, M. Y., Hossen, M. A., Islam, M. S., Jasmine, S., Nawer, F., Rahman, M. M.
• Format: Journal Article
• Language: English
• Published: Berlin Wiley Subscription Services, Inc 01-10-2017
• Subjects: Biology; Body weight; Cast nets; Ecosystem biology; Ecosystems; Endangered & extinct species; Fecundity; Females; Fish; Gonadosomatic index; Males; Management; Rare species; Rivers; Sexual maturity; Spawning; Spawning seasons; Threatened species; Weight; Bangladesh
• ISSN: 0175-8659; 1439-0426
• DOI: 10.1111/jai.13427

Summary
Some aspects of reproductive biology of Pethia ticto (Hamilton, 1822) from the Gorai River of southwestern (SW) Bangladesh were investigated by regular monthly samples for a period of one year during July 2010 to June 2011. A sum of 1200 specimens (male = 454 and female = 746) were collected using cast net, lift net and conical trap. Total length (TL) and Body weight (BW) were measured with slide caliper and digital balance, respectively for each individual. Based on gonadosomatic index (GSI), modified gonadosomatic index (MGSI) and Dobriyal index (DI) first sexual maturity was 4.30 cm TL for male and 4.80 cm TL for female. Also, on the basis of higher values of GSI, MGSI and DI spawning season was ranged from April to September for P. ticto in the Gorai River ecosystem. The fecundity was ranged from 2230–8450 with a mean value of 4779 ± 1578. In addition, there was a significant relationship between total length and fecundity (r2 = .931, p < .001); body weight and fecundity (r2 = .943, p < .001). Therefore, the findings of this study would be very effective for sustainable management of this threatened species in the Gorai River and surrounding ecosystem.