Preliminary Study on the Reproduction of Three Rabbitfish Species (Siganidae) in Sopura Bay, Kolaka Regency :

Muhammad Gazali; M Din Hamdan Sanjaya; Juhardin; Melati Octapian Simanjuntak

doi:10.35800/jip.v14i1.64920

Authors

Muhammad Gazali Universitas Sembilanbelas November Kolaka
M Din Hamdan Sanjaya 19 November Kolaka University, Kolaka
Juhardin 19 November Kolaka University, Kolaka
Melati Octapian Simanjuntak 19 November Kolaka University, Kolaka

DOI:

https://doi.org/10.35800/jip.v14i1.64920

Keywords:

Siganus doliatus, Siganus canaliculatus, Siganus puellus, reproductive biology, Sopura Bay

Abstract

This preliminary study investigated the reproductive biology of three rabbitfish species Siganus doliatus, Siganus canaliculatus, and Siganus puellus collected from Sopura Bay, Kolaka Regency, Southeast Sulawesi. A total of 351 individuals were analyzed between September and November 2025 to determine sex ratio, gonad maturity stages, gonadosomatic index (GSI), and length at first gonad maturity (Lₘ). The results showed male-biased populations in S. puellus (1.53:1) and S. doliatus (1.82:1), while S. canaliculatus exhibited a balanced sex ratio (1.01:1). Most individuals were at gonad maturity stages III–IV, indicating active gonadal development during the sampling period, with the spawning peak estimated in late October to November. The Lₘ values differed between species and sexes, suggesting adaptive reproductive strategies, where males generally matured at smaller sizes than females. The highest GSI values were recorded in S. puellus, indicating higher reproductive activity. These findings provide essential baseline data for understanding reproductive patterns and support sustainable management of rabbitfish resources in Sopura Bay

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