Domu Simbolon, Daniel Julianto Tarigan, Dwi Fanny Yolanda, Marliska Rindi Antika
Areolate grouper (Epinephelus areolatus) is one of the superior commodities of capture fisheries in Karimunjawa waters. Traditional fishermen have not considered the composition of fish length in determining the potential fishing zones. The main orientation of fishermen is to increase catches as much as possible (profit-oriented) without considering the carrying capacity of the environment. This study aimed to determine the potential fishing zones of E. areolatus in Karimunjawa waters through analysis of the catch productivity, gonad maturity and fish length composition. Data related to the fishing spot, fishing operation time, fish length, gonad maturity, catches, and fishing effort was collected through the experimental fishing method. Samples of fish were dissected to retrieve the gonads, then the weight, color, shape, size, and softness of the gonads were observed. Gonad maturity level analysis was used as a reference to determine the fish length in the biologically feasible category (legal size). The productivity level was determined through the analysis of catch per unit effort (CPUE). Appropriate criteria for an indicator of productivity and fish length composition then were used as a basis for determining the category of fishing ground (potential, moderate, or less potential fishing zone). The highest productivity was found at nine fishing spots, namely around the southwest of Nyamuk, east of Genting, north of Laut Jawa, Genting Seruni, Krakal, Menjangan, Parang Kembar, southeast of Karimunjawa, and Gundul. The catches of E. areolatus in Karimunjawa waters were dominated by illegal size categories (65%) and only 35% of the catches corresponded to legal-size categories. The legal size category was found only in two fishing spots, namely around Genting Seruni and Sintok waters. The spatial distribution for less potential fishing zone category was more than (18 spots) potential fishing zone category (2 spots). © 2020, BIOFLUX SRL. All rights reserved.
IPB University, Faculty of Fisheries and Marine Science, Department of Fisheries Resource Utilization, Dramaga Campus, Bogor, 16680, Indonesia; Pendidikan Indonesia University, Marine and Fisheries Education Study Program, Serang Campus, Serang, 42116, Indonesia
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