Critical Condition of Rivulated Parrotfish Scarus rivulatus (Valenciennes, 1840) Population in Wallace Line, Makassar Strait, Indonesia
Suwarni1, Nurliah1, J Tresnati1,2, D Yanuarita1, 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

Rivulated Parrotfish is a fishery commodity in great demand because of its white meat and delicious taste. Rivulated Parrotfish Scarus rivulatus is a Scaridae mostly caught in the Spermonde Islands waters. The increasing fishing rate can affect the population structure of the Rivulated Parrotfish. Therefore, sustainable fishing Rivulated Parrotfish needs a priority. The study aims to assess the exploitation rate of Rivulated Parrotfish in the Spermonde Islands waters. The Rivulated Parrotfish Samples were taken from the fisher catch landed at the Fish Landing Port, Makassar City. The growth rate was Lt = 40 [1-&#119890--0.26(t-0.5945)]. The total mortality rate was 2.86, the natural mortality rate was 0.69, the fishing mortality rate was 2.17, the exploitation rate was 0.76, and the Relative Yield per Recruitment (Y^/R) was 0.0851, dan Y^/R maximum was 0,0782 grams. This exploitation rate and Y^/R indicated the critical condition of Rivulated Parrotfish Scarus rivulatus- if this case continues, then Rivulated Parrotfish could become extinct in Wallacea Line, Spermonde Islands, Makassar Strait, Indonesia

Keywords: Spermonde Islands, growth rate, mortality, exploitation, yield per Recruitment

Topic: Sustainable Fisheries (International)