A study on the reproduction aspects of windowpane oyster (Placuna placenta) within the Kulisusu Bay, Indonesia

Indonesia has enormous coastal and ocean resource potential, including the Kulisusu Bay, located in North Buton Regency, Southeast Sulawesi, which is a habitat of Placuna placenta oyster. This species is commonly consumed as food, but excessive consumption of mature oysters tends to influence the wi...

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Bibliographic Details
Published inAquaculture, Aquarium, Conservation & Legislation Vol. 15; no. 6; pp. 2725 - 2738
Main Authors Hari, Harmin, Rianse, Usman, Sara, La, Bahtiar, Kasim, Ma'ruf
Format Journal Article
LanguageEnglish
Published Cluj-Napoca Bioflux SRL 30.12.2022
Subjects
Chi-square test
Eggs
Fecundity
Females
Food consumption
Gonadosomatic index
Gonads
Males
Mann-Whitney U test
Marine molluscs
Marine resources
Maturity
Oysters
Placenta
Placuna placenta
Regeneration (biological)
Sex
Sex ratio
Sexual maturity
Shellfish
Spawning
Statistical methods
Statistical tests
Sulawesi
Indonesia
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Summary:Indonesia has enormous coastal and ocean resource potential, including the Kulisusu Bay, located in North Buton Regency, Southeast Sulawesi, which is a habitat of Placuna placenta oyster. This species is commonly consumed as food, but excessive consumption of mature oysters tends to influence the wild population's structure and regeneration. Therefore, this study aims to determine the reproductive aspects of P. placenta, including the sex ratio, gonad maturity level, gonadosomatic index (GSI), fecundity, and size at first sexual maturity. The study was conducted from October 2017 to October 2018 in the waters of Kulisusu Bay. Sampling was performed using the quadratic transect method, and 40 oysters were collected per location. Subsequently, the sex ratios, gonad maturity level, GSI, and fecundity were analyzed using non-parametric tools including the Chi-square test, quantitative descriptive statistics, and the Mann-Whitney U test. Meanwhile, fecundity and size at first sexual maturity were examined linearly and non-linearly. The results showed that the sex ratio between the males and females was not significantly different at 1.01:0.99. P. placenta experienced peak maturity in April, while spawning occurred between late May and July. In addition, the GSI values ranged from 1.57 to 15.7 and 8.55 to 24.44 in males and females, while the fecundity ranged from 126,973 to 1,621,217, and the sizes at first sexual maturity were 6.7 cm and 7.2 cm respectively.
ISSN:1844-8143
1844-9166