Population parameters of the yellow-edged lyretail (Variola louti, Forsskål, 1775) in Sibolga Waters

Ignatius Tri Hargiyatno,Ria Faizahl,E.S Kartamihardja,A Collins,D.F Mokodongan,S.M Bergmann,T Peristiwady,Djumanto Djumanto,Alimuddin Alimuddin,E Setyobudi,N Hubert,S.B Andi Omar,C.P.H Simanjuntak,P.G Sasmita

doi:10.1051/e3sconf/202132201015

Abstract

The grouper is one of the coral fishery commodities with high economic value. One of the members of the Serranidae family is the yellow-edged lyretail (Variola louti). In Sibolga waters, this fish was caught by traps and handline. The exploitation of yellow-edged lyretail in Sibolga waters was carried out continuously. Therefore, it was necessary to take good management measures to maintain the sustainability of this fish. This study was conducted in Sibolga from April-December 2016. This study aims to get information about population parameters, size distribution, and growth patterns of the fish in Sibolga waters. The size distribution of the yellow-edged lyretail caught was 24-41 cm, with an average length of 31.57 cm. The weight of the yellow-edged lyretail caught ranged from 200-680 g. The mean weight was 395.53 g. The growth pattern of the yellow-edged lyretail is negative allometric. The growth equation for a yellow-edged lyretail was Lt = 48.55 (1 – e-0.1 (t-0.7806)). The value of length at first captured (Lc) = 31,99 cm. Natural mortality (M) = 0.42/year, fishing mortality (F) = 0.50/year. The exploitation rate = 0.55/year, it means the exploitation rate of the yellow-edged lyretail in Sibolga waters slightly exceeds the optimum

Highlights

Grouper has many species and belongs to reef fish resources, and is a prime commodity with high economic value
Grouper in Indonesia consists of various species, including humpback grouper, brown marble grouper, leopard grouper, giant grouper, and others
[4] It is reported that yellow-edged lyretail is a species associated with coral reefs; it lives at a depth of 3-240 m, usually less than 15 m, and in clean water

Summary

Introduction

Grouper has many species and belongs to reef fish resources, and is a prime commodity with high economic value. Grouper, included in the sub-family Epinephelinae, consists of 161 species belonging to 15 genera [1]. [2] stated that the grouper species are scattered in tropical and subtropical waters. Many groupers are very important commodities as they have a very high economic value, which may reach US$50/kg in Hong Kong [1]. Groupers are carnivorous fish within the food chain system of coral reef ecosystems. [4] It is reported that yellow-edged lyretail is a species associated with coral reefs; it lives at a depth of 3-240 m, usually less than 15 m, and in clean water

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