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International Journal of Fisheries and Aquatic Studies
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E-ISSN: 2347-5129, P-ISSN: 2394-0506

International Journal of Fisheries and Aquatic Studies

2019, Vol. 7, Issue 2, Part B

Length-weight and length-length relationships of three neritic tuna species of Sri Lankan coastal waters


Author(s): Deishini Herath, Chintha Perera, Chamari Hettiarachchi and Brian Murphy

Abstract: The length-weight and length-length relationships were determined for the three neritic tuna species Euthynnus affinis, Auxis thazard and Auxis rochei caught within Sri Lankan waters. Samples were collected from October 2015 to September 2017. The R2 values for all three species were higher than 0.9 and were highly significant (p<0.001). The condition factor K, was 1.427, 1.476 and 1.361 for E. affinis, A. thazard and A. rochei respectively. The value of b in the length weight equation was shown to be 3.115, 3.431 and 3.408 for the three species indicating positive allometric growth patterns. Furthermore, the b values for the provinces studied were above 3.0 for all three species. The correlations between the total length, fork length and standard length, were also highly significant (p<0.001). The results indicate that these three species are living in a favourable environment having a healthy growth pattern along the coastal regions of Sri Lanka.

Pages: 129-133  |  326 Views  44 Downloads

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How to cite this article:
Deishini Herath, Chintha Perera, Chamari Hettiarachchi, Brian Murphy. Length-weight and length-length relationships of three neritic tuna species of Sri Lankan coastal waters. Int J Fish Aquat Stud 2019;7(2):129-133.
International Journal of Fisheries and Aquatic Studies