Author/Authors :
NARIDO, CHARINA I. University of San Carlos - Department of Biology, Marine Biology Section, Philippines , NARIDO, CHARINA I. Holy Name University - Mathematics and Science Department, Philippines , PALLA, HERMINIE P. University of San Carlos - Department of Biology, Marine Biology Section, Philippines , PALLA, HERMINIE P. Western Philippines University, Puerto Princesa Campus - College of Fisheries and Aquatic Science, Philippines , ARGENTE, FRANCIS ALBERT T. University of San Carlos - Department of Biology, Marine Biology Section, Philippines , ARGENTE, FRANCIS ALBERT T. Pangasinan State University, Binmaley Campus - Department of Fisheries, Philippines , GERALDINO, PAUL JOHN L. University of San Carlos - Department of Biology, Marine Biology Section, Philippines
Abstract :
Population dynamics and fishery status of the roughear scad, Decapterus tabl Berry 1968 caught from Camotes Sea, Central Philippines were investigated. Asymptotic length (L∞) was 32.55 cm while growth coefficient (K) was 0.97 year^-1. Total mortality (Z) was 5.57 year-1 while natural mortality (M) and fishing mortality (F) were 1.71 year-1 and 3.86 year-1 respectively. Exploitation level (E) was 0.69. The length at which 50% of the fish were retained by the gear (L50) was 17.48 cm. The recruitment pattern was continuous with one major peak in the months of February-March.The coefficient “b” of the length-weight relationship (LWR) was 2.986 (±0.178) indicating isometric growth while results of the length-length relationships (LLRs) were highly correlated (r²=0.99, p 0.01). The fishery of roughear scad revealed mean monthly catch per unit effort (CPUE) and income per unit effort (IPUE) ranging from 0.83-11.48 kg.man^-1.h^-1 and 73.10-1247.80 peso.man.h^-1 (1.72-29.39 USD) while total catch was estimated at 144,856 tonnes during the study period. High Z and F suggest that the roughear scad is facing high level of exploitation in the Camotes Sea. It is recommended that the reproductive biology should be studied to properly address the fishing pressure confronting this species.
