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All Journal Jurnal Ilmu dan Teknologi Kelautan Tropis
Kuncoro Catur Nugroho
School of Business, IPB University, Bogor, 16680, Indonesia
Biochemistry, Genetics & Molecular Biology Decision Sciences, Operations Research & Management Library & Information Science

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Population Dynamics of the Three-Spot Swimming Crab (Portunus sanguinolentus) in Pati Waters, Central Java Kamal Mustabiq; Navisa Fairuz; Dicky Darmawan; Ayu Ervinia; Kuncoro Catur Nugroho; Wita Setioko
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 15 No. 3 (2023): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitkt.v15i3.51512

Abstract

Saat ini Portunus sanguinolentus merupakan salah satu komoditas perikanan yang mengalami penurunan populasi akibat tekanan eksploitasi dan kerusakan habitat atau lingkungan. Hal ini berdampak pada perubahan struktur populasi dan strategi reproduksi P. sanguinolentus, dengan parameter yang dapat berubah antara lain ukuran gonad pertama yang mengecil, perubahan daerah dan musim pemijahan, serta perubahan keseimbangan rasio jenis kelamin. Penelitian ini bertujuan untuk mengetahui dinamika populasi P. sanguinolentus di Kabupaten Pati Jawa Tengah dan bermanfaat bagi industri pengolahan untuk menghasilkan suatu produk baru. Data dan informasi diperoleh melalui observasi, wawancara, dan pencacahan yang dilakukan di setiap tempat pendaratan ikan. Pengumpulan data hasil tangkapan dilakukan di daerah penangkapan ikan kurang dari 12 mil dengan kedalaman maksimal 15 m selama 5 bulan. Perangkat lunak FISAT II digunakan untuk menganalisis parameter pertumbuhan, tingkat kematian, dan tingkat eksploitasi. Diperoleh data berat badan sebesar 7,72 kg dengan jumlah sampel sebanyak 107 ind yang terdiri dari 46 ekor betina dengan rata-rata lebar 106,24 mm dan 61 ekor jantan dengan lebar 103,95 mm, serta rata-rata berat seluruh sampel 74,26 g.
Population Parameters of Blue Swimming Crab Portunus pelagicus in the Tiworo Strait, Southeast Sulawesi Muhamad Cardin APRI; Muh Welis; Ayu Ervinia; Bambang Arif Nugraha; Kuncoro Catur Nugroho
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 15 No. 3 (2023): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitkt.v15i3.51514

Abstract

The blue swimming crab (Portunus pelagicus) has a wide distribution in the fishing ground waters for fishermen's activity in the Tiworo Strait. The coastal area of Tiworo Strait has quite a lot of crab potential. Therefore, it is used as one of the pilot locations for sustainable crab management projects of the Indonesian Blue Swimming Crab Association (APRI). Growth, total mortality, natural death, fishing mortality, and the exploitation rate were the population parameters of crabs that need to be known so that management can be carried out in a sustainable manner of fisheries. A study on the population parameters of crabs has been conducted in the Tiworo Strait, based on carapace width frequencies data collected from Juli to December 2021 and analyzed using FISAT (FAO-Iclarm Stock Assessment Tool) II. The total sample is 7,809 samples, where the number of male blue swimming crabs is 3,295 samples and 4,514 females. The average size of the blue swimming crab carapace width caught was 107.57 mm for males and 110.65 mm for females. The results of the study showed that the growth rate (K) was 1.01/year, the total mortality rate (Z) was 0.67/year, the natural death rate (M) was 1.25/year, and the fishing mortality rate was 0.58/year. The exploitation rate (E) of blue swimming crab was 0.86, which showed symptoms of over–exploitation, so the management of crabs in these waters must be carried out more carefully to sustain the availability of crab resource stocks. Keywords: blue swimming crab, width, weight, Tiworo Strait
Blue Swimming Crab Enlargement Technique: Insight from Small-Scale Fishery in the South Coast of Pamekasan, Madura Island Lailatul Qomariyah; Muhammad Wijdan Taqiyuddin; Mohamad Bagus Satria; Kuncoro Catur Nugroho; Wita Setioko
Jurnal Ilmu dan Teknologi Kelautan Tropis Vol. 15 No. 3 (2023): Jurnal Ilmu dan Teknologi Kelautan Tropis
Publisher : Department of Marine Science and Technology, Faculty of Fisheries and Marine Science, IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.29244/jitkt.v15i3.51515

Abstract

Pagagan Village, Pademawu District, and especially members of the "Berkah Capit Biru" fishermen, had the potential to carry out the sustainability of blue swimming crab because of the abundant crab fisheries. The purpose of this research was to encourage fishermen to not always carry out crab fishing activities in nature so nature remained sustainable and to increase the potential of natural and human resources who were enthusiastic about crab enlargement in Pagagan village. This research was conducted from January to May 2022. The crab breeding location measured 8x10 meters, had a substrate of muddy sand, and was in a coastal area bordering a mangrove ecosystem. Wooden stakes woven with bamboo with a netting around them were set higher than the wave. This enlargement technique did not use aeration in the form of wheels but only utilized tidal conditions so that periodic water changes occurred at the site. The stages in the crab enlargement technique are 1) site selection, 2) construction, 3) spreading seeds, 4) feeding, 5) controlling, and 6) harvesting. This enlargement technique is a solution for crab fishermen to meet market stocks. Keywords: blue swimming crab, enlargement technique, small-scale fishery
Co-Authors Ayu Ervinia Bambang Arif Nugraha Dicky Darmawan Kamal Mustabiq Lailatul Qomariyah Mohamad Bagus Satria Muh Welis Muhamad Cardin APRI Muhammad Wijdan Taqiyuddin Navisa Fairuz Wita Setioko