Penelitian bertujuan untuk menghasilkan benih ikan nila salin yang tahan terhadap penyakit streptococcocis melalui vaksinasi induk. Vaksin yang digunakan dalam penelitian ini adalah bakteri Streptococcus sp. yang dilemahkan dengan formalin 3% (v/v). Penelitian ini dilaksanakan pada Juni-September. Vaksin diinjeksikan pada indukan TKG 2 sebanyak 0,4 mL/kg (konsentrasi 1x109 CFU/mL). Penelitian terdiri dari tiga perlakuan yaitu indukan diinjeksi dengan phosphate buffered saline (PBS) (K), indukan diinjeksi vaksin satu kali (A1), dan indukan diinjeksi vaksin sebanyak dua kali dengan selang waktu dua minggu (A2). Benih yang dihasilkan dari masing-masing perlakuan, diuji tantang melalui perendaman dengan bakteri Streptococcus sp. 107 CFU/mL selama 30 menit pada 10, 15, dan 20 hari setelah penetasan. Parameter yang diamati adalah penetasan telur, aktivitas lisozim, kematian benih setelah uji tantang, dan persentase kelangsungan hidup relatif (RPS) benih. Hasil penelitian menunjukkan bahwa daya tetas telur pada perlakuan A2 (92,21%) secara nyata lebih tinggi (P<0,05) dibandingkan perlakuan induk lainnya, serta aktivitas lisozim (99,47-197,89 U/mL) sampai dengan hari ke-20. Angka kematian pada perlakuan A2 (2,34-45,21%) secara signifikan lebih rendah (P<0,05) dibandingkan perlakuan lain sampai hari ke-20. Nilai RPS indukan A2 tidak berbeda nyata (P>0,05) dengan perlakuan benih dari indukan A1 pada hari ke sepuluh tetapi lebih tinggi pada hari ke 20.
Abstract. Jompa J, Umar W, Yusuf S, Tassakka ACM, Limmon GV, Rahmi, Putri AP, Halwi, Tamti H, Moore AM. 2020. Genetic patterns of the corals Euphyllia glabrescens and Lobophyllia corymbosa across the Indonesian Archipelago. Biodiversitas 21: xxxx. Scleractinian corals can reproduce in several ways, with two main sexual reproduction modes known as brooding and broadcast spawning. In this study, we described patterns of genetic variation within and connectivity between coral populations in western Indonesia (Seribu Archipelago), central Indonesia (Spermonde Archipelago), and eastern Indonesia (Ambon). We sampled two readily identifiable corals popular in the marine aquarium trade, one species widely reported as a brooder (Euphyllia glabrescens), the other as a broadcast spawner (Lobophyllia corymbosa). The mitochondrial COI genome was amplified for 117 samples. Within-population genetic variation was high, especially at the eastern Indonesia (Ambon) site. The genetic connectivity patterns were similar for the two corals, with high connectivity between the Seribu and Spermonde Archipelagos (despite a geographical separation of more than 1,000 km) and a lack of connectivity between these two sites and Ambon. These results indicate a potential barrier to gene flow between coral populations in western/central Indonesia and those to the east of Sulawesi Island.
Abstract. Yusuf S, Beger M, Tassakka ACMAR, Brauwer MD, Pricella A, Rahmi, Umar W, Limmon GV, Moore AM, Jompa J. 2021. Cross shelf gradients of scleractinian corals in the Spermonde Islands, South Sulawesi, Indonesia. Biodiversitas 22: 1415-1423. Coral reef ecosystems around the world have suffered extensive degradation, including the reefs of the Wallacea region within the Coral Triangle global biodiversity hotspot. Anthropogenic and natural threats can reduce the level of coral reef biodiversity differentially across environmental or impact gradients. The purpose of this study was to evaluate the changes in hard coral (Scleractinia) diversity and community structure across an inshore-offshore zonation gradient in the Spermonde Islands, South Sulawesi, Indonesia. Data on coral colony species and abundance as well as live coral cover were collected from 10 m2 belt transects at a depth of 6 to 8 m. A total of 72 transects were placed around the 12 island stations in three zones: the inner mid-shelf zone, outer mid-shelf zone and outer shelf zone. Data were analyzed to determine the species richness, and three ecological indices for the hard coral communities were calculated: the Shannon Diversity Index (H'), Similarity Index (E), and Dominance Index (C). A total of 310 hard coral species belonging to 62 genera were recorded. The coral communities were dominated by the genera Fungia, Montipora and Porites, and coral cover was in the 'moderate' category. The number of species was directly proportional to the number of colonies within each zone. Live coral cover was higher in the inner mid-shelf zone and outer shelf zone than the outer mid-shelf zone; conversely, the species richness and coral colony abundance were higher in the outer mid-shelf zone. However, the differences were not statistically significant. The indices H’, C, and E did not differ significantly between the zones. However, Tambakulu Island in Zone 4 had the lowest values of E and H’ and the highest value of C. Findings suggest that most-hard coral communities in the cross-shelf zones of the Spermonde Islands are stable communities characterized by relatively high diversity and low dominance indices.
Salah satu kecamatan yang memiliki potensi kelautan dan perikanan yang unggul di Kabupaten Pangkajene dan Kepulauan yaitu Kecamatan Bungoro. Potensi perikanan unggulan di Desa Bulu Cindea, Kec. Bungoro merupakan peluang untuk melakukan investasi. Beberapa permasalahan wilayah yang menjadi fokus di Rencana Pembangunan Jangka Menengah Daerah-RPJMD PEMDA Kab. Pangkep berfokus pada 2 permasalahan wilayah, yaitu aspek perikanan dan aspek lingkungan. Oleh karena itu, U n i v e r s i t a s H a s a n u d i n (UNHAS) bekerjasama dengan Universitas M u h a m m a d i y a h (U N I S M U H) M a k a s s a r d a n Pemda Kabupaten Pangkep bersepakat untuk mencoba mengatasi dan mengurangi masalah ini dalam tiga tahun (2019-2021). Beberapa hal yang akan dilaksanakan selama tiga tahun yaitu pengembangan usaha garam rakyat dan garam industri, pengembangan usaha budidaya udang windu, pengembangan kegiatan penangkapan ramah lingkungan, pengembangan usaha hasil olahan ikan, kegiatan pengelolaan lingkungan yang terdiri dari pengolahan sampah, pembentukan bank sampah serta pengelolaan air bersih.
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