Length-weight Relationship and Relative Condition Factor inThenus Orientalis (Lund, 1793) along East Coast of India
2009
P. Vijayanand
In order to focus sand lobsters T. orientalis from the eastern coast of India, study on their lengthweightrelationships and relative condition factor w as carried out for a period of one year. A total of 824specimens of T. orientalis ranging from 58mm to 252 mm were collected from the Mudasal odai landing center.The Total Length (TL) and weight was measured. Comprising of 543 males and 281 females were used for thisstudy. The length-weight relationships shows the b values obtained for males and females are 2.9161 and2.9758. The b value for females was slightly higher than males because of their faster growth rate in theyounger size groups. During the present study, in the length-weight relationship of T. orientalis the weightincreased proportionately to an increase in length in males and females. It is clear from the above that thedifference in all the morphological relationships between the two sexes of T. orientalis is very narrow. Thusit is clear that these fishes maintain its body shape throughout its life with slow growth rate. The peak minimumvalue of Kn based on length wise for males and females were recorded at 93 and 97mm (TL) respectively. TheKn value for males and females was higher during March and April Lower values of ‘Kn’ for males andfemales were recorded during the length at first maturity.
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