Spawning periodicity and size at first sexual maturity of Siganus fuscescens (Houttuyn, 1782) in Bolinao, Pangasinan

Date

4-2002

Degree

Bachelor of Science in Biology

College

College of Arts and Sciences (CAS)

Adviser/Committee Chair

Vincent V. Hilomen

Abstract

A total of 111 samples of Siganus fuscescens from Bolinao. Pangasinan were examined to determine the sex ratio, sexual pattern and size at first sexual maturity. A sex ratio of 1:1.22 (male to female) was obtained and indicated that the sexual pattern of S fuscescens is gonochoristic. Histological examination of gonads showed asynchronous development of oocytes suggesting that the species is a batch spawner. Initial examination of the gonado-somatic index (GSI) suggests the species spawn all year with two peaks occurring from March to May and August to October. Size at first sexual maturation was estimated at a class size of 14.5-15.5 cm total length (TL). These information are useful in understanding the reproductive biology of these species. The sexual pattern, sex ratio and size at first sexual maturity are bases for specific management strategies for the fishery of S. fuscescens in Bolinao.

Language

English

Location

UPLB Main Library Special Collections Section (USCS)

Call Number

Thesis

Document Type

Thesis

This document is currently not available here.

Share

COinS