Annual Research & Review in Biology

Length-Weight and Length-Girth Relationships, Relative Weight and Relative Condition Factor of Four Commercial Fish Species of Northern Persian Gulf

M. Daliri *

Fisheries Department, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.

S. Y. Paighambari

Fisheries Department, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.

M. J. Shabani

Iran Shrimp Research Center (ISRC), Bushehr, Iran.

M. Pouladi

Fisheries Department, Isfahan University of Technology, Isfahan, Iran.

R. Davoodi

Agricultural and Natural Resources College, Persian Gulf University, Bushehr, Iran.

*Author to whom correspondence should be addressed.

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Abstract

Length-weight and length-girth relationships (LWR and LGR), relative weight (Wr) and relative condition factor (Krel) of four commercial fish species (Lethrinus nebulosus, Carangoides talamparoides, Lutjanus argentimaculatus and Argyrops spinifer) from northern Persian Gulf (Bushehr coastal waters) were calculated. Samples were collected on monthly basis during December 2006 to June 2008 using pot nets. The LWR had a significant correlation for all species and the exponent b ranged from 2.6657 (L. nebulosus) to 2.8353 (L. argentimaculatus). All length-girth relationships also were highly signiï¬cant and the exponent b ranged from 0.2776 (L. nebulosus) to 0.3591(A. spinifer). Relative weight ranged from 0.50±0.59 (C. talamparoides) to 1.02±1.35 (L. argentimaculatus). Relative condition factor also ranged from 1.01±0.17 (A. spinifer) to 1.05±0.5 (L. nebulosus). In conclusion, this study provides basic information for fishery biologists and managers in the Persian Gulf.

Keywords: Length-weight relationship, length-girth relationship, relative weight, relative condition factor, Persian Gulf.

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