Length-weight relationships of the pink shrimp penaeus notialis and giant tiger shrimp p. Monodon of Buguma creek in the niger delta, nigeria

Abstract

Two hundred indigenous pink shrimps, Penaeus notialis and 19 exotic giant tiger Shrimps, P. monodon from Buguma Creek were caught in brackish water tidal ponds of the Nigerian Institute for Oceanography and Marine Research, Buguma in April, May and June 2005. The length-weight relationship of both species indicated allometric pattern of growth. Regression coefficient values (b) computed were 2.92 and 2.97 for P. notialis and P.monodon respectively, although the values are not significantly different from 3 (Isometric growth) (P>0.05). In terms of biomass, P. monodon significantly outweighed P notialis (P<0.05), having mean individual weight of 13.37 + 8.86g as compared to P notialis with a mean weight of 2.82 + 2.12g. However, P. notialis indicated a better condition factor (K) than P. monodon. Computed K values were 0.876 + 0.119 and 0.803+0.45 for P notialis and P. monodon respectively, although not significantly different (P>0.05).

Keywords: Penaeus notialis , P. monodon, brackish water, Length weight Relationship, condition factor.


The Zoologist Vol. 5 2007: pp. 47-53