Length-weight relationship and condition factor of bombay duck Harpadon nehereus from landings of fishery ghat, Chittagong

Tasnuba Hasin

doi:10.3329/ralf.v3i2.29367

Abstract

The current study describes the length-weight relationships and condition factor of Bombay duck, Harpadon nehereus from landings of Fishery Ghat, Chittagong. A total of 300 individuals caught by various mesh size of gill nets by commercial fishers were investigated from April 2016 to June 2016. On the basis of hypothetical cube law W=aLb, the variance of b for both total length and standard length were estimated statistically (0.0090 and 0.0088 respectively). Using the value of t=1.96 at the 95% confidence limits for b were estimated as 2.218 to 2.590 for total length-weight relationship and for standard length-weight relationship, 1.985 to 2.353 which indicated allometric growth pattern for both cases. The monthly relative condition factor during three months of observation (0.978, 1.033, and 1.097) showed no notable difference due to spawning strain, spent condition and lower feeding rate right after peak spawning season.Res. Agric., Livest. Fish.3(2): 355-360, August 2016

Highlights

The Bombay duck Harpadon nehereus lives in the tropical waters of the Indo-Pacific and traditionally caught in the waters of the Bay of Bengal
Length weight relationship Investigating 300 individuals over three months the total length was found ranging from 11.8 cm to 25.4 cm, standard length of 9.9 cm to 21.4 cm and weighing from 4.36 g to 52.71 g are given in the Table 1
The length-weight relationship of Harpadon nehereus samples collected from a local market was investigated over three months as part of an ongoing annual research

Summary

INTRODUCTION

According to Rahman (1989 and 2005) it is highly esteemed as food in Chittagong (Bangladesh) where these are found in abundance He mentioned that dried Bombay duck has commercial importance in the South and Southeast Asia. The present study was intended to investigate the length-weight relationship and condition factor of H. nenereus which is an essential part of growth study and overall health status These data are of important scientific findings to determine how fast the fish grow and the recovery time of its population after exploitation

MATERIALS AND METHODS

AND DISCUSSION

CONCLUSION