Reproductive biology of mangrove clams<i>Geloina expansa</i>(Mousson, 1849) from mangrove at Kendari Bay, Southeast Sulawesi, Indonesia

Bahtiar, .; Purnama, Muhammad Fajar; Kasim, Ma'ruf; Ishak, Ermayanti

doi:10.1080/17451000.2023.2185639

Cited by 3 publications

(3 citation statements)

References 36 publications

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“…Water quality samples (water temperature) were taken at the same time as G. expansa sampling. The shell width of G. expansa was measured using a caliper with an accuracy of 0.05 cm (Figure 2) (Bahtiar et al 2023).…”

Section: Methodsmentioning

confidence: 99%

“…On the other hand, the high activity in the upland section of Kendari Bay, as the center of all community activities around Kendari City and South Konawe areas, exacerbates the decline of G. expansa, whose life depends on the quality of the environment and the substrate in the mangrove ecosystem (Idris et al 2017;Bahtiar et al 2023), marked by the high natural mortality of G. expansa populations in mangrove waters. Several species of Polymesoda or Geloina clams, such as: Polymesoda solida R.A.Philippi, 1846, Polymesoda arctata Deshayes, 1855 (Argente and Ilano 2013;Dolorosa and Dangan-Galon 2014), have been exploited on large scales because of their high economic values (Yahya et al 2018;Ransangan et al 2019).…”

Section: Introductionmentioning

confidence: 99%

“…Likewise, G. expansa are delectable, predisposing to the high consumption of G. expansa meat by the people of Kendari City (Putra et al 2017). The increasing demand from the people of Kendari City has decreased the population of G. expansa from year to year (Bahtiar et al 2023). A decrease in clams' harvested size indicates overfishing (Tamsar et al 2013).…”

Section: Introductionmentioning

confidence: 99%

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Population dynamics of mud clam Geloina expansa (Mousson, 1849) in degraded mangrove area at Kendari Bay, Indonesia

BAHTIAR,

KASIM,

HATI

et al. 2024

Biodiversitas

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Abstract. Bahtiar B, Kasim M, Hati YIP, Ishak E. 2024. Population dynamics of mud clam Geloina expansa (Mousson, 1849) in degraded mangrove area at Kendari Bay, Indonesia. Biodiversitas 25: 616-623. Mud clams, Geloina expansa (Mousson, 1849), locally known as kalandue, are bivalves living in mangrove forests. These mud clams are currently experiencing ecological pressure, and are susceptible to the degradation of mangrove areas and the exploitation of the clams. This research was conducted in the mangrove forests of Kendari Bay for a year, from November 2016 to October 2017. Geloina expansa samples were collected throughout the mangrove forest area, and the water temperature was measured simultaneously with G. expansa sampling. The width of G. expansa shell was measured using a caliper. Population structure, growth, mortality, and exploitation rate data were analyzed using the Bhattacharya method, the von Bertalanffy inverse function, the width converted catch curve, and Pauly's empirical formula, all accommodated in the FiSAT II program version 3.0. The results showed that the G. expansa population was spread out from two and three-size groups, i.e., juvenile, adult, and old-size groups, dominated by the older group. Geloina expansa growth model follows the Lt = 10.08-(10.08-0.025) e-0.6t, which generally consists of 1.5-2.5 years of maturity. The total mortality (Z) of G. expansa was 2.26, in which the highest contributing factor was natural mortality (M) as opposed to fishing mortality (F), with values of M = 1.72 and F = 0.56. Thus, the exploitation rate (E) was within the low category, with a value of 0.24.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Population dynamics of mud clam Geloina expansa (Mousson, 1849) in degraded mangrove area at Kendari Bay, Indonesia

BAHTIAR,

KASIM,

HATI

et al. 2024

Biodiversitas

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Traditional knowledge and socioeconomic aspects of small-scale bivalve fishing on the Amazon coast: A case study of Iphigenia brasiliensis on the Island of Maranhão

de Jesus,

Câmara,

Leal

et al. 2024

Marine Policy

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Temporal variations in growth and condition index of kalandue clams (Polymesoda erosa, Solander 1786) in Kendari Bay, Southeast Sulawesi

Bahtiar,

Fekri,

Ishak

et al. 2023

IOP Conf. Ser.: Earth Environ. Sci.

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The growth and condition index of kalandue shellfish in the mangrove forest of Kendari Bay, Southeast Sulawesi is not fully known. This study aims to determine the growth and condition index of kalandue shellfish (Polymesoda erosa) in Kendari Bay, Southeast Sulawesi. Kalandue mussels were taken randomly throughout the waters using a shovel as deep as 20 cm in the aquatic substrate. Kalandue mussels were measured in length and wet weight was measured using a caliper and a digital scale with an accuracy of 0.5 mm and 0.01 g, respectively. The shells were separated by sex and dried in an oven at 70oC for 72 hours. Kalandue mussels were weighed dry and shell weight using an analytical balance with an accuracy of 0.0001g. The length-weight relationship data were analyzed using linear regression and the condition index was analyzed using the Mann Whitney test. The results showed that the length-weight relationship of males and females was in isometric conditions with values of 3.08 and 3.05, respectively. The lowest b value was found in February and the highest was in May. The condition index of male and female caladue shells was not significantly different with values of 9.26±5.50 and 6.75±4.90, respectively. The condition index experienced two peaks, namely in May and September. Furthermore, the condition index of kalandue mussels increased along with the increase in body size (shell width).

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Reproductive biology of mangrove clamsGeloina expansa(Mousson, 1849) from mangrove at Kendari Bay, Southeast Sulawesi, Indonesia

Cited by 3 publications

References 36 publications

Population dynamics of mud clam Geloina expansa (Mousson, 1849) in degraded mangrove area at Kendari Bay, Indonesia

Population dynamics of mud clam Geloina expansa (Mousson, 1849) in degraded mangrove area at Kendari Bay, Indonesia

Traditional knowledge and socioeconomic aspects of small-scale bivalve fishing on the Amazon coast: A case study of Iphigenia brasiliensis on the Island of Maranhão

Temporal variations in growth and condition index of kalandue clams (Polymesoda erosa, Solander 1786) in Kendari Bay, Southeast Sulawesi

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