UKURAN LAYAK TANGKAP DAN DAMPAK EKOLOGIS PENANGKAPAN BARONANG (Siganidae) DI PERAIRAN PULAU HARAPAN, KEPULAUAN SERIBU, JAKARTA

Rabbitfishes (Siganids) fishing activities tend to increase and potentially impact fish target ecosystem, which is indicated by changes in population size structure the trophic level of catches. Scientific information on Siganids techniques its ecological are limited. The aims study are: (1) describe technical aspects fishery; (2) estimate parameters length at first maturity (Lm) as catch limit indicators for this target; (3) evaluate food chain balances (trophic level) resources area. were observed during field study. species other fishes from various gears sampled, then identified calculated individually. samples also measured weight. This showed that fishers used three kinds fish, i.e., rope traps, bamboo spear gun. There five caught research, they Barhead spinefoot (Siganus virgatus), Goldspotted (S. punctatus), Streaked javus), Orange-spotted guttatus), White-spotted canaliculatus), with Lm value 3.5, 22.8, 30.6, 21.2, 20.8 cm, respectively. All catches exceeded (Lm), except S. punctatus Javus was only 65.51% 4.00% respective acceptable size. Finally, area impacted function natural balance level). It dominance (48%) 3.
 Keywords: impact, rabbitfish, Siganidae, limit,