Indian scad fish (Decapterus russelli) is a small pelagic fish species commonly caught in Indonesian seas. Excessive fishing efforts can cause population degradation, so it is necessary to understand its population structure. The purpose of this study was to analyze the population structure parameters of Indian scad fish, including growth parameters, cohort, and mortality. Sampling was done by Stratified Random Sampling method. Data analysis used the FISAT II application. Study results showed that there were 4 cohorts. The growth parameters of Indian scad fish obtained asymptote length (L∞) of 296.15 mm, coefficient of growth rate (K) of 0.60 per year, and initial age (t0) of -0.66 years. Value of coefficient of growth rate (K) indicated that growth of scad was relatively slow. The total mortality value (Z) was 0.51 per year, natural mortality (M) was 0.0034 per year, and fishing mortality (F) was 0.51 per year. So that the highest Indian scad fish mortality was caused by fishing mortality. The exploitation rate (E) was 1 per year, indicating that the Indian scad fish resources have been overexploited.
Buah dari beberapa jenis mangrove dapat digunakan sebagai bahan baku olahan pangan yang saat ini mulai berkembang dengan pesat. Sebagai upaya pemenuhan tersebut maka upaya pengelolaan mangrove dan lingkungan perlu segera dilakukan sehingga ke depan olahan bahan pangan tersebut semakin berkembang dan berfungsi sebagai sumber bahan pangan. Buah lindur dapat diolah menjadi aneka produk makanan seperti kue, cake, dicampur dengan nasi atau dimakan langsung dengan bumbu kelapa. PKM ini dilakukan dengan tujuan memberikan pengetahuan kepada masyarakat tentang teknik pengolahan buah mangrove Bruguiera gymnorrhiza berbasis IPTEK dan teknologi tepat guna. Luaran PKM adalah produk hasil olahan buah mangrove yang memiliki nilai jual yang tinggi yaitu kue kering good time, dan selai dau. Pelaksanaan pengabdian di Desa Maitara Utara Kecamatan Tidore Utara pada bulan September 2021. Metode pelaksanaan kegiatan Pengabdian Kemitraan Masyarakat meliputi : metode survey, metode sosialisasi, metode ceramah, metode praktek, metode pengujiam organoleptic dan metode pendampingan. Kegiatan PKM berdampak positif terhadap masyarakat karena menambah pengetahuan masyarakat tentang pengolahan buah mangrove Bruguiera gymnorrhiza sebagai bahan makanan. Kegiatan platihan ini dianggap berhasil karena semua peserta pelatihan begitu bersemangat dan antusiasme dalam menekuni pelatihan olahan buah mangrove sebagai produk kue good time dan selai dau, hasil uji organoleptik semua produk disukai oleh responden dan produk Good Time merupakan produk yang memiliki nilai skoring lebih tinggi. Terbentuknya kelompok wirausaha “Mari Rasa Kreatif” dalam rangka keberlanjutan kegiatan pelatihan.
Reef fish is a constituent component for coral reef ecosystems, so it is very important to identify the distribution of reef fish species. This study aims to assess the number of reef fish species, diversity, abundance, recruitment, and frequency of size. The results showed that the number of reef fish species on Ternate Island was 42 families, 109 genera, and 265 species. The high level of diversity is 3.57 - 4.79 with an abundance of 8 - 28 ind.m−2. The addition of new individuals to the population both due to reproduction and migration of 16.26 - 51.72%, the size-frequency of reef fish based on the size of the first time the gonads mature (Lm) is 45.00 - 70.00% of the total population of reef fish.
Fish apartment is a management actions to maintain the presence of coral fish that serves as a new habitat well as shelter and spawning. The number of fish apartment at each location is 20 units. The present study aimed at assessment the response of coral fish to the fish apartment based on the species and number of individuals coral fish. Total species found in the area of fish apartment as much as 7 families and 9 species with a total of 241 individual coral fish in the Tobololo, while 12 families and 23 species with a total of 567 individual. Moreover, the juvenile of coral fish is not identified with a size of 2-3 cm, the number of individuals in Tobololo 154 and 275 in Gamalama. The response of coral fish positively to the fish apartment evidenced by an increase in abundance and the percentage of the number and types of coral fish. So that management action with fish apartment approach provides a positive impact on the presence of coral fish as a new habitat and supports the corals juvenile.
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