Size Distribution of Mangrove Crabs (Scylla spp.) Caught By Fishermen in the Bagek Kembar Exclusive Ecosystem Area (KEE), Sekotong, West Lombok
DOI:
10.29303/jpm.v20i8.11184Published:
2025-12-31Issue:
Vol. 20 No. 8 (2025): Special IssueKeywords:
KEE Bagek Kembar; Mangrove Crab; Morphometric; Scylla spp.; Size DistributionArticles
Downloads
How to Cite
Downloads
Metrics
Abstract
Mangrove crab (Scylla spp.) is one of the fishery commodities of high economic value that depends on the existence of mangrove ecosystems. The Bagek Kembar Exclusive Ecosystem Area (KEE) in Sekotong, West Lombok, is one of the important habitats for mangrove crabs and serves as the primary location for fishing activities by local fishermen. This study aims to determine the distribution of mangrove crab size caught by fishermen based on morphometric parameters, which include carapace length, carapace width, abdomen width, propodus length, propodus width, merus length, dactylus length, and plepod diameter. This type of research uses a descriptive research design with a quantitative approach. Sampling was conducted using purposive sampling, where mangrove crabs caught by fishermen at the research site were considered a representative sample of the population. Data analysis was conducted using descriptive statistics, which included calculating mean values, median, mode, and standard deviation, as well as analysing the frequency distribution of mangrove crab sizes. The determination of the number of classes and the interval of the frequency distribution class was carried out using Sturges' rule formula to describe the population structure of mangrove crabs. The study's results showed that most of the mangrove crabs caught were small to medium in size. The majority (65%) of crabs have a carapace length (PK) between 4–6 cm and are dominated by the juvenile or premature gonadal phase. The rarity of large individuals (>10 cm) suggests that crabs are significantly exploited before reaching their maximum adult size. This pattern also shows the role of KEE Bagek Kembar as a nursery ground dominated by juvenile individuals. Based on these findings, management efforts such as determining minimum catch sizes, protecting nursery habitats, increasing fishing gear selectivity, and long-term population monitoring are recommended to support the sustainability of mangrove crab stocks in this region.
References
I. Hadi, “Struktur komunitas gastropoda sebagai bioindikator pencemaran air Sungai Gorong Kabupaten Lombok Tengah,” Biocaster: Jurnal Kajian Biologi, vol. 3, no. 2, pp. 85–99, 2023, doi: 10.36312/biocaster.v3i2.175.
E. R. Amini, G. Hadiprayitno, and I. W. Suana, “Identification of potential and suitability of Bagek Kembar mangrove forest as a tourist attraction,” Jurnal Biologi Tropis, vol. 24, no. 2, pp. 333–341, 2024, doi: 10.29303/jbt.v24i2.6835.
B. Gunawan et al., “Aksi restorasi penanaman mangrove dalam memitigasi bencana,” Asthadarma: Jurnal Pengabdian Kepada Masyarakat, vol. 3, no. 2, pp. 1–10, 2022, doi: 10.55173/asthadarmajurnalpengabdiankepadamasyarakat.v3i2.1.
H. V. Santiti and A. Herison, “Pemanfaatan hutan mangrove untuk budidaya kepiting bakau,” 2018.
M. Hilmi, K. Karnan, and M. L. Ilhamdi, “Population structure of mud crab (Scylla serrata) in mangrove forest of Bagek Kembar,” Jurnal Biologi Tropis, vol. 24, no. 1, pp. 699–707, 2024, doi: 10.29303/jbt.v24i1.6683.
R. S. D. Gita, “Keanekaragaman jenis kepiting bakau (Scylla spp.),” Jurnal Biologi dan Pembelajaran Biologi, vol. 1, no. 2, pp. 148–161, 2016.
R. Silaban et al., “Sebaran ukuran dan pola pertumbuhan kepiting bakau,” Jurnal Kelautan, vol. 16, no. 3, pp. 231–242, 2023, doi: 10.21107/jk.v16i3.22536.
K. Dananjaya, G. Prayitno, and D. A. Nafurbenan, “Distribusi ukuran kepiting bakau,” Jurnal Sumberdaya Akuatik Indopasifik, vol. 6, no. 3, pp. 247–258, 2022, doi: 10.46252/jsai-fpik-unipa.2022.vol.6.no.3.228.
D. Santoso and A. Syukur, “Community structure and carbon content of mangrove forest,” Jurnal Biologi Tropis, 2024.
D. Jaya et al., “Dampak aktivitas perikanan terhadap sumber daya pesisir,” 2025.
E. Tiurlan, A. Djunaedi, and E. Supriyantini, “Aspek reproduksi kepiting bakau,” Journal of Tropical Marine Science, vol. 2, no. 1, pp. 29–36, 2019, doi: 10.33019/jour.trop.mar.sci.v2i1.911.
M. M. Beku, K. G. Sine, and A. A. Ayubi, “Ukuran layak tangkap kepiting bakau,” Jurnal Bahari Papadak, vol. 2, no. 2, pp. 42–48, 2021.
M. Ramdhan, Metode Penelitian. Bandung: Cipta Media Nusantara, 2021.
Sugiyono, Metode Penelitian Kuantitatif, Kualitatif, dan R&D, 19th ed. Bandung: Alfabeta, 2013.
H. Fazhan et al., “Sexual dimorphism in mud crabs,” PeerJ, vol. 9, 2021, doi: 10.7717/peerj.10936.
R. E. Walpole, Pengantar Statistika. Jakarta: Gramedia, 1995.
I. S. B. Ramandey, S. Mulyani, and N. A. Umar, “Sebaran ukuran kepiting bakau,” Journal of Aquaculture and Environment, vol. 6, no. 1, pp. 1–6, 2023, doi: 10.35965/jae.v6i1.3880.
Patnaik, S. K., Panda, P., dan Sahoo, P. K., “Juvenile abundance and post-larval incursion of mud crabs (Scylla spp.) in Chilika Lagoon: Influence of lunar phases,” International Journal of Marine Sciences, vol. 40, no. 6, pp. 834–840, 2011.
Fazhan, M., Kamaruddin, A. M., dan Arshad, A., “Sympatric occurrence and population dynamics of Scylla spp. in equatorial climate: Effects of rainfall, temperature, and lunar phase,” Estuarine, Coastal and Shelf Science, vol. 198, pp. 299–310, 2017
M. Khalil, Zulfikar, and Saifullah, “Eksploitasi kepiting bakau,” Acta Aquatica, vol. 8, pp. 98–102, 2021, doi: 10.29103/aa.v11i3.13571.
S. F. Safitri, S. Sunaryo, and A. Djunaedi, “Biomorfometri kepiting bakau,” Journal of Marine Research, vol. 9, no. 1, pp. 55–64, 2020, doi: 10.14710/jmr.v9i1.25794.
M. E. Walton et al., “Mangrove-mudflat boundaries as nursery grounds,” Marine Biology, vol. 149, no. 5, pp. 1199–1207, 2006.
W. Kantun, S. Wulandari, and H. Anggreni, “Ukuran pertama matang gonad kepiting bakau,” Bawal Widya Riset Perikanan Tangkap, vol. 14, no. 2, pp. 57–67, 2022.
A. S. Hardiyanti et al., “Biomorfometrik kepiting bakau,” Buletin Oseanografi Marina, vol. 7, no. 2, 2018, doi: 10.14710/buloma.v7i2.20686.
Author Biographies
Lina Sapta Laraswati, Biology Education Study Program, University of Mataram
Abdul Syukur, Biology Education Study Program, University of Mataram
Karnan Karnan, Biology Education Study Program, University of Mataram
H. Mahrus, Biology Education Study Program, University of Mataram
License
Copyright (c) 2025 Lina Sapta Laraswati, Abdul Syukur, Karnan Karnan, H. Mahrus
This work is licensed under a Creative Commons Attribution 4.0 International License.
The following terms apply to authors who publish in this journal:
1. Authors retain copyright and grant the journal first publication rights, with the work simultaneously licensed under a Creative Commons Attribution License 4.0 International License (CC-BY License) that allows others to share the work with an acknowledgment of the work's authorship and first publication in this journal.
2. Authors may enter into separate, additional contractual arrangements for the non-exclusive distribution of the journal's published version of the work (e.g., posting it to an institutional repository or publishing it in a book), acknowledging its initial publication in this journal.
3. Before and during the submission process, authors are permitted and encouraged to post their work online (e.g., in institutional repositories or on their website), as this can lead to productive exchanges as well as earlier and greater citation of published work (See The Effect of Open Access).
