The study explained the morphometric (length, L-weight, W) relationship (W=aL b) and the spawning... more The study explained the morphometric (length, L-weight, W) relationship (W=aL b) and the spawning season of anchovy and sardine sampled from the coastal waters of Lawas, Sarawak in 2017 until 2018. In the study, the dominant species of anchovy and sardine in Lawas waters were initially determined, which were Encrasicholina devisi and Sardinella fimbriata. The length-weight relationship was estimated via the FiSAT program, while the spawning season was discovered through ovary examination. The total length (TL) ranged from 4.2 cm-8.9 cm and 10.07 cm-14.60 cm for E. devisi and S. fimbriata respectively. The length-weight relationships were given by W = 0.005846L 3.0134 , r 2 = 0.8 for E. devisi while W = 0.07663L 2.1028 , r 2 = 0.71 for S. fimbriata. The asymptotic length (L∞) was estimated at 7.61 cm, growth coefficient (K) was 1.10 yr-1 , total mortality (Z) was 4.48 yr-1 , natural mortality (M) was calculated as 2.88 yr-1 and fishing mortality (F) was 1.60 yr-1 for E. devisi. On the other hand, S. fimbriata recorded the asymptotic length (L∞) at 15.61 cm, growth coefficient (K) was 0.97 yr-1 , total mortality (Z) was 3.23 yr-1 , natural mortality (M) was calculated as 2.17 yr-1 and fishing mortality (F) was 1.06 yr-1. The females reached the first sexual maturity at a size of 6.0 cm and 13.50 cm total length for E. devisi and S. fimbriata. The major spawning months were estimated to occur in June and November for E. devisi while March and July for S. fimbriata. The information obtained was important as a guideline for the management to establish a fishing regulation for a sustainable fishery in the waters of Lawas.
The study explained the morphometric (length, L-weight, W) relationship (W=aL b) and the spawning... more The study explained the morphometric (length, L-weight, W) relationship (W=aL b) and the spawning season of anchovy and sardine sampled from the coastal waters of Lawas, Sarawak in 2017 until 2018. In the study, the dominant species of anchovy and sardine in Lawas waters were initially determined, which were Encrasicholina devisi and Sardinella fimbriata. The length-weight relationship was estimated via the FiSAT program, while the spawning season was discovered through ovary examination. The total length (TL) ranged from 4.2 cm-8.9 cm and 10.07 cm-14.60 cm for E. devisi and S. fimbriata respectively. The length-weight relationships were given by W = 0.005846L 3.0134 , r 2 = 0.8 for E. devisi while W = 0.07663L 2.1028 , r 2 = 0.71 for S. fimbriata. The asymptotic length (L∞) was estimated at 7.61 cm, growth coefficient (K) was 1.10 yr-1 , total mortality (Z) was 4.48 yr-1 , natural mortality (M) was calculated as 2.88 yr-1 and fishing mortality (F) was 1.60 yr-1 for E. devisi. On the other hand, S. fimbriata recorded the asymptotic length (L∞) at 15.61 cm, growth coefficient (K) was 0.97 yr-1 , total mortality (Z) was 3.23 yr-1 , natural mortality (M) was calculated as 2.17 yr-1 and fishing mortality (F) was 1.06 yr-1. The females reached the first sexual maturity at a size of 6.0 cm and 13.50 cm total length for E. devisi and S. fimbriata. The major spawning months were estimated to occur in June and November for E. devisi while March and July for S. fimbriata. The information obtained was important as a guideline for the management to establish a fishing regulation for a sustainable fishery in the waters of Lawas.
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