ABSTRAK _ Untuk mengetahui pertumbuhan ikan gabus (Channa sfnafa Bloch) di daerah banjiran Talang Fatima DAS Musi Sumatera Selatan telah dilakukan penelitian daii outan luli Zooz sampal Desember 2002. lkan sampel diperoleh dari nelayan pengumpul. Setiap bulan dilakukan pengukuran panjang, penimbangan bobot, dan pembedahan untuk pengamatan jenis kelamin. Hasil yang diperoleh ikan gabus di daerah rawa banjiran Sungai Musi iapat mencapai ukuran maksimum (L*)=722,8 mf d?l koefisien pertumbuhan (K)=1,30 th-1. Pota pertumbuhan ikan gabus pada bulan Juli-Oktober bersifat isometrik (b=3), sedangkan pada bulan Nopember dan Desember bersifat alometrik negatif (b>3), nilai faktor kondisi ikan gabus berftuktuasi antara 0,51-1,g1. ABSTRACT: Growth of snakehead fish (Channa striata Btoch) in flood ptain area of Tatang Fatima Musi river, Souftr Sumatra. By: Safran Makmur An investigation on grovvth of snakehead (Channa striata Bloch) in flood plain area of Talang Fatima Musi river, South Sumatera was carried out in July titt December 2002. The fish samples were collected from the fisherman of length, weight and ground were measured the parameters obse-rued monthly. The_,sna.kehea.! tish may reach the miximum size (L-.1=722.g mm'and growth coefficient (K)=1.36 yf'. The pattem of siakehead frsh's growth in peiod of July-October was isometric (b=3), meanwhile the growth paftern in period o7 November-December was alometric negative (b>3), the conditional factor was ftuctuated in the range o.sl-1 .g1 .
Snakehead gudgeon (Giuris margaritacea) or Payangka in Indonesian’s local name, has a high population and been used as a consumption fish mainly by people around Lake Tondano, not only the consumption size, but also the juvenile (it called Nike) are preferred. The fish resources are the essential source and need to keep their sustainable in the future. The research was carried out in 2015. The study was aimed to identify and record some aspects of snakehead gudgeon fish biology in Lake Tondano Mi-nahasa Regency of North Sulawesi. Fish samples were obtained from fisher's catch. The morphometric and meristic character was measured, and also was performed surgery to observe reproduction and food. The results showed that the growth pattern of Giuris margaritacea was positive allometric with sex ratio 1: 1.41. The fish was spawning whole year with fecundity between 36,892-90,102 eggs, and diameter of the egg was 0.285 mm on average. The size of the first mature female was 10.75 cm gonads. Snakehead gudgeon was a carnivorous fish with shrimp as the primary food, and the relative length of the digestive tract was 82.88%.
Suatu penelitian untuk mengetahui aspek perikanan tangkap di Danau Matano, Mahalona, dan Towuti telah dilakukan dari bulan Mei Desember 2005. Danau Matano, Mahalona, dan Towuti merupakan contoh dari ekosistem danau tektonik yang menampung jenis ikan endemik dan juga jenis ikan introduksi (tilapia dan ikan mas, Cyprinus carpio). Penelitian ini dilakukan dengan metode survei dengan cara mencari lokasi-lokasi ada aktivitas penangkapan ikan, wawancara dengan nelayan, dan bekerjasama dengan enumerator dalam mengumpulkan data penelitian. Hasil penelitian telah mendapatkan 22 jenis ikan endemik dan 6 jenis ikan introduksi yang tertangkap di ketiga danau (Matano, Mahalona, dan Towuti). Danau Matano tertangkap 7 jenis ikan endemik, Mahalona 8 jenis, dan Danau Towuti tertangkap 15 jenis. Jaring dan bagan merupakan alat tangkap yang dominan digunakan oleh nelayan untuk menangkap ikan endemik seperti ikan buttini (Glossogobius sp.) dan pangkilan (Telmatherina sp. dan Paratherina sp.). Hasil tangkapan ikan di Danau Towuti 5,7 kg per ha per tahun, Danau Mahalona 1,8 kg per ha per tahun, dan Danau Matano 1,2 kg per ha per tahun. Untuk melestarikan ikan-ikan endemik perlu ada pengelolaan dan pengaturan waktu dan lokasi penangkapan yang baik. A research in order to identify the capture fishery at Lakes: Matano, Mahalona, and Towuti was conducted from May to December 2005. Lakes Matano, Mahalona, and Towuti are examples of the representative tectonic lake ecosystems housing the endemic and some exotics (tilapia and carp, Cyprinus carpio) fish species. The survey methods were used in this reseacrh by hunting the location of fishing activities, interview with fishermen and partnership with enumerator in collecting research data. Results of the research show that 23 endemic fish species and 6 introduced per exotic fish species were caught in three research lakes. From 22 endemic fishes, 7 fish species were caught at Lake Matano, 8 fish species at Lake Mahalona, and 15 fish species were caught at Lake Towuti respectively. Gillnets and bagan were dominant fishing gears to catch the endemic fishes such as buttini (Glossogobius sp.) and pangkilan (Telmatherina sp. and Paratherina sp.). The productivity of the fisheries were 5.7 kg per ha per year for Lake Towuti, 1.8 kg per ha per year (Lake Mahalona), and 1.2 kg per ha per year (Lake Matano) respectively. To sustain endemic fishes is needed a better management eg. domesticating and regulating time and location of capture endemic fish species.
ABSTRAKPemanfaatan dan pengelolaan perikanan harus memperhatikan aspek konservasi agar sumberdaya hayati yang ada didalamnya seperti ikan dapat tetap lestari. Danau Ranau merupakan salah satu sumberdaya alam yang potensial menghasilkan ikan yang telah lama dimanfaatkan masyarakat nelayan setempat sebagai sumber kehidupan. Ikan hampal (Hampala macrolepidota, Kuhl & Van Hasselt 1823) mempunyai peran atau fungsi ekonomis dan ekologis di perairan Danau Ranau. Penelitian dilakukan pada tahun 2013 di perairan Danau Ranau Kabupaten Ogan Komering Ulu Selatan Provinsi Sumatera Selatan dan Kabupaten Lampung Barat Provinsi Lampung. Tujuan penelitian untuk mendapatkan konsep pengelolaan ikan hampal di Danau Ranau. Penelitian mengintegrasikan secara menyeluruh aspek lingkungan perairan, biologi ikan, penangkapan dan dinamika populasi ikan hampal. Pengelolaan ikan hampal di Danau Ranau dapat dilakuan melalui: 1) pengelolaan habitat, 2) pengelolaan populasi dan 3) pengelolaan penangkapan. Pengelolaan ikan hampal di Danau Ranau dapat dilakukan sebelum populasi ikan tersebut menurun sehingga dapat tetap lestari. Merekomendasikan konsep pengelolaan ikan hampal di Danau Ranau kepada Pemerintah Daerah Sumatera Selatan dan Lampung untuk dituangkan dalam Peraturan Daerah. Kata Kunci: Pengelolaan; ikan hampal; Danau Ranau ABSTRACTUtilization and water management have to consider the aspect of conservation therefore biological resources such as fish can be preserved. Ranau Lake is one of the potential natural resources to produce fish that has long been used by local fishing communities as a source of lifehood. Hampal barb (Hampala macrolepidota, Kuhl & Van Hasselt in 1823) has economically and ecologically role or function in Ranau Lake. This study was conducted in 2013 in Ranau Lake, South OKU Regency, South Sumatera Province and West Lampung Regency,Lampung Province. The aim of research was to obtain a concept of management of hampal barb in Ranau Lake. The management of hampal in Ranau Lake could be attempted through the integration study of environmental aspects, fish biology, capture fishery and fish population dynamic data. It can be done prior to the fish population decline in order to maintain their stable population. Recommending the concept of hampal barb management in Ranau Lake to South Sumatra and Lampung Government for consideration of developing a local government regulation.
Keputusan pengelolaan perikanan harus didasarkan pada bukti-buktu ilmiah,diantara kelemahan pengelolaan perairan umum di dunia saat ini ialah terbatasnya informasi-informasi ilmiah dan tidak meratanya upaya-upaya konservasidi semua wilayahtropis. Tujuan penelitian ini adalah untuk mendapatkan data-data ilmiah tentang kajian dinamika populasi ikan Mystus nemurus (parameter pertumbuhan, rekrutmen, mortalitas, laju eksploitasi) dan status penangkapannya. Metode penelitian yang digunakan untuk parameter pertumbuhan ikan menggunakan metode von Bertalanffy, komposisi umur (kohort), rekrutmen di analisis dengan program FISAT II, estimasi nilai t0 berdasarkan model Pauly (1983), pendugaan mortalitas alami (M) berdasarkan model Pauly (1980), pendugaan mortalitas total (Z) berdasarkan model Beverton dan Holt (1996) dan status penangkapan dengan membandingkan ukuran panjang ikan pertama kali tertangkap (Lc) dengan pertama kali matang gonad (Lm) berdasarkan Sparre dan Venema (1999).Hasil penelitian menunjukkan Nilai parameter pertumbuhan ikan M. nemurus ialah K sebesar 0,8/tahun dan nilai L∞ sebesar 28,35cmdan nilai t0 -0,08 tahun, persamaan pertumbuhan ikan metode Von Bertalanffy ialah Lt = 28,35{1-exp-0,8(t + 0,08)}, rekrutmen terjadi sepanjang tahun dan puncaknya terjadi pada bulan Juni, laju mortalitas total (Z) ikan sebesar 2,42/tahun, laju mortalitas alami (M) 1,59/tahun,laju mortalitas penangkapan (F) 0,83/tahun, laju eksploitasi (E) 0,34/tahun dan status penangkapan ikan M. nemurus di hulu sungai Barito tergolong growth overfishing. A fisheries management decision must be based on scientific evidence, among the weaknesses of freshwater management in the world today are limited scientific information and unequal conservation efforts in all tropical regions.The purpose of this study was to obtain scientific data about the study of the dynamics population of the Mystus nemurus (growth parameters, recruitment, mortality, exploitation rate) and fishing status.The research method used for growth parameters used the von Bertalanffy method, age composition (cohort), recruitment was analyzed by the FISAT II program, estimated t0 value based on Pauly's (1983) model, estimation of natural mortality (M) based on Pauly's (1980) model, Estimation of total mortality (Z) based on the Beverton and Holt (1996) model and fishing status by comparing the Length at first capture (Lc) with Length at first mature (Lm) based on the Sparre and Venema (1999). The results showed that the growth parameter value of M. nemurus was K of 0.8/year, L∞ value of 28.35 cm and a value of t0 -0.08 years, the equation for the growth of fish using the Von Bertalanffy method was Lt = 28.35 {1 -exp-0.8 (t + 0.08)}, recruitment occurs throughout the year and the peak occurs in June, the total mortality rate (Z) of fish is 2.42/year, the natural mortality rate (M) is 1.59/years, the fishing mortality rate (F) 0.83/year, the exploitation rate (E) 0.34/year and the fishing status of M. nemurus in Barito upstream are classified as growth overfishing.
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