Muhammad Firdaus, Tri Djoko Lelono, Rukisah Saleh, Gatut Bintoro, Gazali Salim
Harpadon nehereus, also known as nomei/pepija fish from Juata Laut, North Kalimantan, Indonesia used to be caught by fish trawlers which obtained huge quantities of fish of various sizes and from various biological conditions. This study aims to examine the relationship between weight and length (linear and exponential logarithm) and between Le Cran (Kn value) and Fulton (K value) condition factors for the interpretation of fish body expression. In total, 480 samples of H. nehereus were used, with the male-female ratio of 1.3 (57.5%/276 fish):1 (42.5%/204 fish). Length-weight relationship (LWR) analysis of male samples yielded b = 2.7027 (negative allometry), while female samples yielded b = 3.5019 (positive allometry). The relative condition factor (Kn) of H. nehereus males ranged from 0.499 to 4.289 with a mean value of 1.054. Overall, 55.07% of male fish (152 individuals) expressed a flat/thin body, and as many as 37.68% (104 fish) expressed a plump body shape. Meanwhile, the relative condition factor (Kn) of H. nehereues female ranged from 0.660 to 2.056 with an average value of 1.013. The results demonstrated that as many as 47.55% of fish (97 individuals) have a flat/thin body, while 49.02% (100 fish) have a plump body shape. On the other hand, Fulton's condition factor of male fish showed a range of 1.180-2.045 and an average K value of 1.474. There were 69.2% (191 male fish) samples representing a low K value, while the rest (85 fish) represented a high K value. Fulton's condition factor of female samples ranged from 0.094 to 0.120, with an average K value of 0.107; in total, 48.5% (99 female fish) represented a high K value and 51.5% (105 fish) a low K value. © 2018, BIOFLUX SRL. All rights reserved.
Faculty of Fisheries and Marine Science, Borneo University of Tarakan, Tarakan, 77124, Indonesia; Faculty of Fisheries and Marine Science, Brawijaya University, Malang, 65145, Indonesia
