Captive Rearing of Critically Endangered Indigenous Mohashol (Tor Tor, Hamilton) with Supplementary Feeds for Growth and Maturity Enhancement

By : Mohammad Abu Taher , Umme Tanjum Ara Ripa , Mohammad Matiur Rahman , Md. Ahsan Bin Habib , Md. Rafiqul Islam Sarder

Page No: 52-71

Abstract
Red fin Mahseer (Tor tor) is one of the most attractive, high valued cyprinid fishes in Bangladesh, were reared in captivity with supplementary feeds. Two formulated feeds (37.65% and 44.02% protein) were used for growth in two ponds (Treatment 1 and Treatment 2 respectively). After 17 months of rearing, the mean weight gains were significantly (p<0.05) higher in Treatment 2 (2296.75 ± 116.18 g) than Treatment 1 (1435.63 ± 91.94 g). The length-weight relationship was determined as W=0.04111L2.70 and W=0.03848L2.72 in Treatment 1 and Treatment 2 respectively indicated a negative allometric growth. The survival rate of fish was 100% in both treatments. For maturity and gonadal development, Vitamin-E, Vitamin-C, Zinc and Selenium, and egg were provided with the feeds. Some improvements in gonadal development of male and female brood fish were observed. Few males produced good quality sperm but no ovulated eggs were obtained though bulky and swollen abdomens were detected in few females. In overall, this slow-growing cold water T. tor species demonstrated an impressive growth performance in the captive rearing and a sign of gonadal maturation.

Authors :
Md. Abu Taher, Umme Tanjum Ara Ripa, Md. Matiur Rahman And Rafiqul Islam Sarder : Department of Fisheries Biology and Genetics, Bangladesh Agricultural University, Mymensingh, Bangladesh.
Md. Ahsan Bin Habib : Department of Aquaculture, Bangladesh Agricultural University, Mymensingh, Bangladesh.
 

DOI: http://doi.org/10.32381/JAT.2025.40.1-4.7