Over Exploitation of Indian Parrotfish Chlorurus capistratoides (Bleeker, 1847) Population in Spermonde Islands, South Sulawesi, Indonesia D F Inaku1, A Safitri1, M T Umari1, A Tuwo2, 3, Suwarni1, I Yasir2,3, A Yanti3,4, P Y Rahmani3,5, R Aprianto3, and J Tresnati1,3
1Fisheries Department, Faculty of Marine Science and Fisheries, Universitas Hasanuddin, Makassar, Indonesia.
2Marine Science Department, Faculty of Marine Science and Fisheries, Universitas Hasanuddin, Makassar, Indonesia.
3Multitrophic Research Group, 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
Indian Parrotfish Chlorurus capistratoides is the reef fish of the Scaridae family. Indian Parrotfish was one of 34 species caught in the Spermonde Islands. Ecologically, the Indian parrotfish has a vital role in the coral reef ecosystem because it can graze on macroalgae covering the surface of dead coral, thus inhibiting coral recruitment. The fishing activity that increases continuously in Spermonde Islands can reduce the ecological role of Indian parrotfish- therefore, it is necessary to analyse the population parameters, i.e., growth, mortality, and exploitation rate. This study analyse the growth, mortality, and exploitation rate of Indian parrotfish in the waters of the Spermonde Islands, South Sulawesi, Indonesia. The Samples of Indian parrotfish were taken from the catch landed at the Rajawali Fish Landing Port, Makassar City. The growth rate was Lt = 39.50 [1-e-0.42(t + 0.36)]. The total mortality rate was 2.32 year-1, the natural mortality rate was 0.95 year-1, the fishing mortality rate was 1.37 year-1, and the exploitation rate was 0.59 year-1. The current relative Yield per Recruitment (Y^/R) (0.0227 grams) is greater than the maximum Y^/R (0.0171 grams). This Y^R indicates that parrotfish in the Spermonde Islands waters have been over-exploited
Keywords: Herbivores, growth rate, mortality, exploitation, yield per recruitment
