Over Fishing of Red-breasted Wrasse Cheilinus fasciatus (Bloch 1791) Population in Spermonde Islands, Indonesia Irmawati1, Suwarni1, A Nurhandayani1, J Tresnati1,2, B S Parawansa1, I Yasir2,3, A Yanti2,4, P Y Rahmani2,5, R Aprianto2 and A Tuwo2, 3
1Fisheries Department, Faculty of Marine Science and Fisheries, Universitas Hasanuddin, Makassar, Indonesia.
2Multitrophic Research Group, Universitas Hasanuddin, Makassar, Indonesia.
3Marine Science Department, Faculty of Marine Science and Fisheries, Universitas Hasanuddin, Makassar, Indonesia.
4Aquatic Resources Management Study Program, Graduate Program, Bogor Agricultural University, Bogor, Indonesia.
5Marine Science Study Program, Faculty of Marine Science and Fisheries, Universitas Hasanuddin, Makassar, Indonesia.
Abstract
Spermonde Islands have many coral reef fish, such as the Red-breasted Wrasse Cheilinus fasciatus. The exploitation rate of the Red-breasted Wrasse in the Spermonde Archipelago has not been studied. This study aims to determine the exploitation level of Red-breasted Wrasse in the Spermonde Islands. Samples were taken from the fishers catch. The length frequency was analyzed using the Bhattacharya method. Growth was estimated using the von Bertalanffy equation. Total mortality (Z) was estimated using the Beverton and Holt equations. The natural mortality rate (M) was estimated using the Pauly empirical formula. The fishing mortality rate (F) was estimated using the equation F = Z-M. The rate of exploitation (E) was estimated using the Beverton and Holt equations, E = F/Z. Yield per Recruitment (Y/R) was estimated using the Beverton and Holt equations. The growth rate was Lt=45.5[1-〖-exp〗-^{-0.19(t+0.80)} ]. Total mortality rate was 1.22- natural mortality rate was 0.54- fishing mortality rate was 0.68- exploitation rate was 0.55- and relative yield per recruitment (Y^/R) was 0.0153. The exploitation rate greater than 0.50 indicates that the Red-breasted Wrasse in the Spermonde Islands has overfished.
Keywords: Carnivorous fish, growth rate, mortality, exploitation, yield per Recruitment
