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Journal : Jurnal Pengelolaan Perikanan Tropis (Journal Of Tropical Fisheries Management)

The Reproduction of Meretrix meretrix Clams in The Kambu River Estuary, Southeast Sulawesi: Reproduksi Kerang Tahu (Meretrix meretrix) di Muara Sungai Kambu, Sulawesi Tenggara Bahtiar; Muhammad Fajar Purnama; Rahmadhani; Muhammad Nur Findra
Journal of Tropical Fisheries Management Vol 6 No 1 (2022): Journal of Tropical Fisheries Management
Publisher : Departement of Aquatic Resources Management, Faculty of Fisheries and Marine Sciences, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jppt.v6i1.44443

Abstract

Meretrix meretrix is a degraded resource in Kendari Bay waters, but its reproductive pattern is not fully known.. This study aims to determine the level of gonad maturity, gonadal maturity index, fecundity and the size of the first gonad maturity of M. meretrix at the Kambu River estuary, Kendari Bay, Southeast Sulawesi. This research was carried out at the Kambu River estuary for 6 months from August 2021-January 2022. These clams were taken randomly representing all size classes as many as 300 birds during the study. M. meretrix were observed for gonad color and gonad development microscopically, then the length and weight of the gonads were measured using a caliper and analytical balance with an accuracy of 0.5 mm and 0.0001g, respectively. The results showed that the development of male and female gonads was relatively simultaneous, which was dominated by mature gonads (III-IV) in each month of observation. TKG I-V was found in every month of observation. The gonad maturity index of males and females were 4.92-6.00 and 5.53-6.32, respectively. The fecundity of M. meretrix ranged from 4882-85677 grains. The first mature size of the gonads of male and female M. meretrix is 20 mm.
The Population Dynamics of the Exploited White Shells (Meretrix meretrix) at the Kambu River Estuary, Southeast Sulawesi: Dinamika Populasi Kerang Tahu (Meretrix meretrix) yang Tereksploitasi di Muara Sungai Kambu Sulawesi Tenggara Bahtiar; Muhammad Digul Jaya Pratama; Muhammad Fajar Purnama; Muhammad Nur Findra
Journal of Tropical Fisheries Management Vol 6 No 2 (2022): Journal of Tropical Fisheries Management
Publisher : Departement of Aquatic Resources Management, Faculty of Fisheries and Marine Sciences, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jppt.v6i2.43788

Abstract

White shells is one of the types of shellfish that is exploited by the community around the Kambu River estuary whose population dynamics is not known certainty. This study aims to determine the population dynamics of white shells in the Kambu River estuary, Southeast Sulawesi. This research was carried out for six months from August 2021 to January 2022. white shells were collected using garok in all parts of the waters. The shell length was measured using a caliper with an accuracy of 0.05 cm. Data on population structure, growth and mortality of clams was analyzed using FiSAT II version 3,0 software. The results showed that the population structure of white shells were dominated by one size group (young adult) which were distributed. The growth parameters of white shells consisted of asymptotic length (L∞) and growth coefficient (K) were 58,91 mm and 1.1, respectively. Natural mortality (M) of white shells at an annual mean temperature of 28oC was 1,59 yr-1, while fishing mortality (F) and total mortality (Z) of white shells were 3,16 yr-1 and 4,75 yr-1, respectively. The white shells were in an overexploitation condition with an exploitation level (E) of 0,67 yr-1.