Length-Weight Relationships and Condition Factors of Kawakawa Euthynnus affinis and Longtail Tuna Thunnus tonggol  from Sarawak, Malaysia

Jamil Musel*; Arfaezah Anuar; Siti Norasiah Darahman; Richard  Rumpet

doi:10.51200/bjomsa.v7i.3304

Authors

Jamil Musel* Fisheries Research Institute, Sarawak and Labuan Division, FRI Bintawa, Jalan Perbadanan, Peti Surat 2243, 93744, Kuching, Sarawak, Malaysia (*Corresponding Author: deemsebakau@gmail.com)
Arfaezah Anuar Fisheries Research Institute, Sarawak and Labuan Division, FRI Bintawa, Jalan Perbadanan, Peti Surat 2243, 93744, Kuching, Sarawak, Malaysia
Siti Norasiah Darahman Fisheries Research Institute, Sarawak and Labuan Division, FRI Bintawa, Jalan Perbadanan, Peti Surat 2243, 93744, Kuching, Sarawak, Malaysia
Richard Rumpet Fisheries Research Institute, Sarawak and Labuan Division, FRI Bintawa, Jalan Perbadanan, Peti Surat 2243, 93744, Kuching, Sarawak, Malaysia

DOI:

https://doi.org/10.51200/bjomsa.v7i.3304

Keywords:

Tuna fisheries, Euthynnus affinis, Thunnus tonggol, FiSAT, allometric growth, Sarawak

Abstract

Length-weight relationships (LWR) and condition factors (K) were determined for two neritic tuna species Euthynnus affinis and Thunnus tonggol, caught in Sarawak waters. Specimens were collected from five locations around Sarawak between 2016-2019. The r2 value of the LWR for each species re both close to 1 (>0.9), indicating a highly significant relationship attributed to the length and weight of the fish species . The K values are 1.94 and 1.97, and the values of b in the LW equation are 2.53 and 2.59 for E. affinis and T. tonggol, respectively. The b<3 values indicates negative allometric growth patterns, where the growth rate of body length is faster than the weight gain. These values fall within the published range of 2.50 to 3.50 for neritic tuna species in the region. The results of this study provide the basic life history parameters and the general condition of the two species, E. affinis and T. tonggol, useful for our tuna fish stock assessment efforts in Sarawak waters.

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