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Research Article: Population parameters and sex ratio of blue swimming crab (Portunus pelagicus) for its population management in Tiworo Strait waters of Southeast Sulawesi, Indonesia
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A. Suhermen1   , L. Sara *2 , E. Muhajirah3 , I.P. Yustika4 , Y. Yusnaini5 , S. Safilu6 , W. Jali7 |
1- Department of Capture Fisheries of Faculty of Fisheries and Marine Sciences, Diponegoro University, Semarang, Jawa Tengah 50275, Indonesia
2- Department of Aquatic Resources Management of Faculty of Fisheries and Marine Science, Halu Oleo University. Bumi Tridharma, Kendari 93232, Southeast Sulawesi, Indonesia , la.sara@uho.ac.id
3- Department of Marine Biotechnology of Institut Teknologi Kelautan Buton, Balai Kota, Pasarwajo, Buton 93752, Southeast Sulawesi, Indonesia
4- Department of Aquatic Resources Management of Faculty of Fisheries and Marine Science, Halu Oleo University. Bumi Tridharma, Kendari 93232, Southeast Sulawesi, Indonesia
5- Department of Aquaculture of Faculty of Fisheries and Marine Science, Halu Oleo University. Bumi Tridharma, Kendari 93232, Southeast Sulawesi, Indonesia
6- Department of Biology of Faculty of Teaching and Education, Halu Oleo University. Bumi Tridharma, Kendari 93232, Southeast Sulawesi, Indonesia
7- Department of Marine Sciences of Faculty of Fisheries and Marine Science, Halu Oleo University. Bumi Tridharma, Kendari 93232, Southeast Sulawesi, Indonesia |
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Abstract: (42 Views) |
| The objective of this study was to analyze growth and mortality parameters, growth patterns, and sex ratios of blue swimming crabs (BSCs) for the population management policy in Southeast Sulawesi waters. The samples were collected weekly at Pamandati, Bungin Permai, and Kasipute mini plants from July to September 2023. Growth parameters were relatively similar to other tropical waters, but total mortality was high. The exploitation rate (E) was generally low (E< 0.5), except in Pamandati (E = 0.58). BSCs exhibited negative allometric growth (b<3), with carapace width (CW) contributing >55% to weight (W). Poor environmental conditions of BSC habitat were indicated by a negative condition factor. Efforts to maintain the sustainability of BSCs population while providing high economic and social value suggest that BSCs exploitation can still be increased until reaching E=0.5, but BSC females should outnumber males to support reproduction. Juveniles (<10 cm CW) and spawning females should be protected, and mangrove habitats preserved. This study supports and strengthens sustainable BSC management in Indonesia. |
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| Keywords: Growth parameters, Mortalities, Portunus pelagicus, Sex ratio, Growth patterns, Condition factors |
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Full-Text [PDF 540 kb]
(15 Downloads)
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Type of Study: Orginal research papers |
Subject:
Biology & physiology
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