Open AccessLength-weight relationship and condition factor of bombay duck Harpadon nehereus from landings of fishery ghat, Chittagong
Author(s) -
Tasnuba Hasin
Publication year - 2016
Publication title -
research in agriculture, livestock and fisheries
Language(s) - English
Resource type - Journals
eISSN - 2409-9325
pISSN - 2409-0603
DOI - 10.3329/ralf.v3i2.29367
Subject(s) - allometry , fishery , fish <actinopterygii> , significant difference , biology , mean value , veterinary medicine , zoology , mathematics , statistics , ecology , medicine
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