Effect of feeding management of broodstock on breeding performance of bata (Labeo bata)

Syeda Maksuda Yeasmin,Md Anisur Rahman,Md Mer Mosharraf Hossain,Abdulla Al Asif,Md Habibur Rahman

doi:10.3329/ajmbr.v1i3.26479

Abstract

Labeo bata is one of the important minor carps in Bangladesh with great demand as good table fish. The study was conducted to observe the breeding performance at different management practices in Mafatema, Rupali, Modhumoti and Anan fish hatchery and disinfection treatments of water, eggs and fry in Jessore, Bangladesh during 10 March 2014 to 15 May 2015. An improvement in broodstock nutrition and feeding has been shown to greatly improve seed production. Protein and lipid percentage of broodstock diet have been identified as major dietary factors. Protein level was 24.77%, 23.47%, 18.08%, 17.78% and lipid level was 11.07%, 9.50%, 7.74%, 8.14% in Mafatema, Rupali, Modhumoti and Anan fish hatchery respectively. Three concentrations of four chemical-formalin (10, 20, 30 mg/L), malachite green (1, 3, 5 mg/L), NaCl (1, 2, 3 g/L) and methylene blue ( 1, 3, 5 mg/L) treatment regimes and a control were compared for efficacy in treating L. bata eggs to prevent fungus and bacterial infection and improve hatch and survival rate of fry. Highest correlation value between absolute fecundity and body weight (r=.938, p<.05) and total length (r=.891, p<.05) and gonadosomatic index (26.2%) were found in Mafatema fish hatchery among four experimental hatcheries at 24.77% protein and 11.07% lipid level. Better fertilization rate (84.2±5.17%) and hatching rate (82.0±4.30%) were found in Mafatema and Rupali fish hatchery respectively that has significant difference (P<0.05) from that of Modhumoti and Anan fish hatchery at higher protein and lipid level. Lowest deformity rate (6.05+2.65) was observed in Mafatema fish hatchery that was significantly different (P<0.05) from that of Modhumoti fish hatchery. In case of disinfection treatment, methylene blue at 1mg/L bath treatment daily for 4 days showed significantly higher hatching rate (92.33±3.51%) and survival rate (94.33±4.73%).Asian J. Med. Biol. Res. December 2015, 1(3): 553-568

Highlights

Bangladesh inhibits 921 (76 are government hatchery) fish hatchery and 10, 802 fish nursery in its main land (DoF, 2012)
Body weight – fecundity relationship Linear and positive regression line was obtained between body weight and fecundity of L. bata in selected hatcheries
The highest correlation coefficient for the relation was 0.938 found in Mafatema fish hatchery and the lowest value was 0.776 found in Rupalii fish hatchery. It indicated that fecundity was highly correlated with body weight in Mafatema fish hatchery than other fish hatcheries.Relationship between body weight (g) and fecundity of L. bata in different hatcheries are shown in Figure 3 and Figure 4

Summary

Introduction

Bangladesh inhibits 921 (76 are government hatchery) fish hatchery and 10, 802 fish nursery in its main land (DoF, 2012). 14 endemic finfish species are used in hatcheries for seed production. In the recent years the gap between supply and demand of fish is increasing with increased human population without concomitant increase in fish production (Ara, 1998). L. bata is one of the important minor carps in Bangladesh with great demand as good table fish. Recent estimate suggests that worldwide 20% of all fresh water species are extinct, endangered or vulnerable (Moyle and Leidy, 1992).

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Discussion

Conclusion