Holistic Approach for Stock Estimation and Utilization Status of Silver Grunt (Leiognathus splendens): A Case Study of Catch Data at PPN Karangantu, Serang Banten

Abstract

The limitation of information on Peperek fish (Leiognathus splendens) stock is one of the issues that needs to be addressed. Therefore, this research aims to estimate the stock of Peperek fish (Leiognathus splendens) landed at Nusantara Karangantu Fishing Port, Serang Banten, for the last ten years from 2010 to 2020 using a holistic approach. This holistic approach does not require many details from analytical models, such as age structure and fish length, but assumes that the stock is a homogeneous biomass. In this case, there are two simple methods: the swept area, which is the catch per unit area captured by the trawl, and the surplus production, which uses the catch per unit effort. Generally, the data is taken annually and comes from samples of commercial fishing. In this study, the surplus production model with two methods is used: the equilibrium state, such as the Schaefer (1954) and Fox (1970) models, and the non-equilibrium state, such as the Walter-Hilborn (1976) model. The result of this research is to find out how effective the selected method is in estimating Peperek fish (Leiognathus splendens) stock by producing the best R square value for each method. The results of this research will provide useful information for related parties to make appropriate policies for preserving the Peperek fish (Leiognathus splendens) stock.