JURNAL PERIKANAN DAN KELAUTAN TROPIS
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KUALITAS AIR PADA KOLAM LOBSTER AIR TAWAR (Cherax quadricarinatus) DI BBAT TATELU
Get PDFABSTRACTThe study was done at the culture site and in the laboratory. The former covered water temperature and pH in the spawning, nursery and rearing ponds, in the morning, 06:00-07:00, at noon,12:00-13.00, and in the afternoon 17:00 to 18:00. Measurements were taken for 2 weeks. The latter included Dissolved Oxygen (DO), Ammonia, Nitrite, Carbon Dioxide (CO2) and turbidity. Water samples were analyzed in the Laboratory of Freshwater Aquaculture Center (BBAT) Tatelu, North Minahasa. Results showed that water temperature, pH, DO, CO2, turbidity, ammonia and nitrite were in the suitable range for the freshwater lobster culture, except that DO, CO2, turbidity, ammonia in the spawning and rearing ponds on March 14, 2011 were either lower or higher than the National Water Quality Standard for aquaculture.Keywords: Water Quality Parameter, Laboratory, Pond, Water Quality Standard.ABSTRAKPenelitian dilakukan di tempat budidaya lobster dan di laboratorium. Pengukur-an lapangan meliputi suhu air dan pH di kolam pemijahan, pendederan, dan pembesar-an, pada pagi hari (06:00-07:00), siang hari (12:00-13.00), dan sore hari (17:00-18:00). Pengukuran dilakukan selama dua minggu. Pengukuran laboratorium meliputi Oksigen terlarut (DO), Amonia, Nitrit, Karbondioksida (CO2) and kekeruhan. Sampel air dianali-sa di laboratorium Balai Budidaya Air Tawar, (BBAT) Tatelu, Minahasa Utara. Hasil menunjukkan bahwa suhu air, pH, DO, CO2, kekeruhan, amonia dan nitrit berada da-lam kisaran yang sesuai untuk budidaya lobster air tawar, kecuali bahwa DO, CO2, ke-keruhan, amonia di kolam pemijahan dan pembesaran pada 14 Maret 2011 berada le-bih rendah maupun lebih tinggi daripada standar bakumutu air nasional untuk budidaya.Kata kunci: Parameter kualitas air, laboratorium, air kolam, bakumutu
SEBARAN UKURAN BUTIRAN SEDIMEN GISIK SEKITAR GROIN PANTAI KALASEY
Get PDFABSTRACTThis study was conducted to examine the effectiveness of groins built along one of the littoral area in the coastal region of Manado. Logically, in this region the marine processes is strong enough to bring out the sediment, which is why in this area was built groin structures as shore protection. Groin is a structure designed to keep beach sand from being transported away by longshore current or to reduce the transportion of sand. This study was conducted by observing the size distribution of beach sediments around the groin in Kalasey beach. The groins on the Kalasey beach analized for their beach sediment samples were 8 units with 22 beach sediment sample collection spaces. Sediment samples were processed in the laboratory through washing and drying. The sediment was then separated with a sieve. Sediment left on each sieve is weighed and the weights were plotted. This study shows that the presence of groins in Kalasey beach was apparently quite effective to withhold the flow of sediment transport because of longshore current in this shore area.Keywords:.sediment size distribution, groin, Kalasey beach, Manado.ABSTRAKPenelitian ini dilaksanakan untuk melihat efektivitas groin yang dibangun di sepanjang litoral salah satu area dalam kawasan pantai Manado. Secara logis, pada kawasan ini proses laut cukup kuat dalam membawa sedimen keluar, itulah sebabnya sehingga pada kawasan ini dibangun struktur pelindung pantai berupa groin. Groin merupakan salah satu bangunan pelindung pantai yang direncanakan untuk menahan angkutan pasir oleh arus susur pantai (longshore current) atau mengurangi angkutan pasir. Penelitian ini dilakukan dengan mengamati keberadaan sebaran ukuran sedimen gisik yang terhampar di sekitar groin tersebut. Rangkaian groin di pantai Kalasey yang dianalisis sampel sedimen gisiknya adalah sebanyak 8 buah groin dengan 22 ruang pengambilan sampel sedimen. Sampel sedimen ditangani di laboratorium dengan melakukan pencucian dan pengeringan. Setelah kering, sedimen dipisahkan dengan ayakan. Sedimen yang tertinggal di masing-masing ayakan ditimbang dan hasilnya digambarkan dalam grafik peubah distribusi granulometri. Penelitian ini menunjukkan keberadaan groin di Kalasey ini tampaknya cukup efektif menahan laju arus susur pantai dalam mengangkut sedimen keluar dari kawasan pantai ini.Kata kunci: distribusi ukuran sedimen, groin, pantai Kalasey, Manado
PERUBAHAN GARIS PANTAI DESA BENTENAN KECAMATAN PUSOMAEN, MINAHASA TENGGARA
Get PDFABSTRACTBentenan village, located on the East coast of Minahasa peninsula and surrounded by gently sloping hills, has a shoreline of 1.3 km. The shape of the shoreline is curved facing Bentenan Island. It is observed that coastline had been gradually retreating. Research and data collection on the coastline has been conducted in November 2008. As many as 85 points have been plotted using GPS, rectified with LPI maps and compared with a couple of old maps, i.e., Peta Dishidros Lembar 334 1992 and Peta Laut No. 62 1985. Shoreline of Bentenan village shown to be retreated 165 meters in average towards the mainland from 1985 to 2008 (23 years), averaging a decrease of 7.17 meters. This indicates that the shore of Bentenan undergoes a process of erosion/ abrasion which causes changes in shoreline backwards towards the land, also called beach retreat.Keywords: Bentenan, shorelines, Abrasion, beach retreat, geomorphology.ABSTRAKDesa Bentenan memiliki panjang garis pantai sekitar 1,3 km, terletak di pantai Timur semenanjung Minahasa yang bertopografi landai dan dikelilingi oleh perbukitan. Bentuk pantainya melekuk ke dalam dan di bagian depannya terdapat pulau Bentenan. Teramati bahwa bentuk pantai ini makin mundur dari tahun ke tahun. Observasi dan pengukuran dilakukan pada bulan November 2008, sebanyak 85 titik telah dipetakan dengan menggunakan GPS dengan koreksi dari peta LPI dan hasilnya dibandingkan dengan beberapa peta terdahulu yaitu Peta Dishidros lembar 334 tahun 1992, Peta Laut No 62 tahun 1985. Perbandingannya menunjukan garis pantai desa Bentenan mengalami perubahan rata-rata sebesar 165 m mundur ke arah daratan dalam selang waktu 1985-2008 (23 tahun). Dalam periode tersebut setiap tahun daerah ini meng-alami kemunduran garis pantai rata-rata 7,17 m.Kata kunci: Bentenan, Garis pantai, Abrasi, Pantai mundur, geomorfologi
KEBUTUHAN ASAM LEMAK ESENSIAL PADA IKAN LAUT
Get PDFABSTRACTAquaculture has contributed one third of the world is supply of seafood. This contribution is expected to increase in the future. Based on this reason, aquaculture is potential to continually provide food for human needs. One of the key factors to the success of aquaculture is the supply of nutritious feed. Feeding with food of right nutrition value will produce healthy and high quality fish. One of the nutrient elements that plays an important role in aquatic organism growth is lipid. Lipids in the form of essential fatty acids are highly required not only for broodstock and larvae, but also for normal growth of marine fish.ABSTRAKAkuakultur telah memberikan kontribusi sebesar sepertiga kebutuhan dunia akan produk makanan laut, dan akan terus bertambah di masa depan. Dipandang dari sudut ini, akuakultur memiliki prospek untuk menjadi usaha berkelanjutan dalam menyediakan pangan bagi populasi manusia yang terus bertambah. Salah satu faktor yang menentukan keberhasilan dalam usaha akuakultur adalah penyediaan pakan dengan kandungan nutrisi yang optimal. Pemberian pakan dengan komponen nutrisi yang tepat dapat menghasilkan ikan yang sehat dan berkualitas tinggi. Salah satu komponen nutrisi yang sangat berperan dalam pertumbuhan biota akuakultur adalah lipida. Lipida berupa asam lemak esensial sangat dibutuhkan baik oleh induk dan larva, juga untuk pertumbuhan secara normal ikan laut
RATIO PENGENCERAN SPERMA TERHADAP MOTILITAS SPERMATOZOA, FERTILITAS DAN DAYA TETAS IKAN LELE (Clarias sp.)
Get PDFThis study was aimed to determine the effect of the dilution ratio of sperm with optimal NaCl and fructose on the motility of the catfish, Clarias sp., spermatozoa, fertility and hatchability of eggs. Catfish used in this study consisted of one parent pairs (male and female weight of 1000 grams weight of 1500 g). NaCl and fructose solution were diluted with aquabidest. The observation was conducted on the motility of spermatozoa, fertility and hatchability of eggs. The experimental design used completely randomized design (CRD). Dilution ratio is 1: 0, 1, 20, 1: 40, 1; 60, 1: 80, and 1: 100 with replicated 3 times. Observations were carried out soon after the sperm mixed with diluents. Fertility occurred 12 hours after fertilization. Egg hatchability was observed after fertilization. The results showed that the ratio of dilution gave significant effect on the sperm motility, fertility and hatchability of the eggs. This research found that the dilution ratio 1: 60 was the best treatment with the average sperm motility of 96. 66%, fertility of 71, 66 5% and egg hatchability of 70%
PERIKANAN TONGKOL DI PERAIRAN BUYAT PANTE
Get PDFABSTRACTFisheries development in Indonesia, especially in North Sulawesi, is to optimize the utilization of resources through a comprehensively integrated approach and accommodate a variety of interests, such as fishermen, national economy, sustainability of marine resources and fisheries, and environmental balance and sustainability. For fisheries policy preparation, adequate information on fish resources is required. One of the fish resources in Buyat Bay area is little tuna (Auxis thazard). This study aimed to evaluate the little tuna resource and fishing season in the waters of Buyat Bay and surrounding areas. The fishing area in Buyat Bay waters is 4.88 km2. The little tuna biomass of Buyat Bay is 0.486 ton/km2. Monthly average catch was 0.7 tons relative to the maximum sustainable catch of 2.37 ton/month, and then the exploitation rate was 29.59%. This meant that the catch landed in Buyat Pante was lower than the monthly maximum sustainable catch. The catch is allowed at 80% of the maximum sustainable catch, which amounted to 1.89 tons/month. Tuna fishing season in Buyat Bay occurred in March and then from May to September following the pattern of the two-month season of the year for high density.ABSTRAKPembangunan perikanan di Indonesia, khususnya di Sulawesi Utara adalah mengoptimalkan pemanfaatan sumberdaya melalui pendekatan yang terintegrasi dengan komprehensif dan mengakomodasi berbagai kepentingan, yaitu: nelayan, ekonomi nasional, kelestarian sumberdaya kelautan dan perikanan, serta keseimbangan dan kelestarian lingkungan. Untuk penyusunan kebijakan perikanan diperlukan informasi yang memadai dari sumberdaya ikan. Salah satu sumberdaya ikan di wilayah Teluk Buyat adalah ikan tongkol (Auxis thazard). Penelitian ini bertujuan untuk mengevaluasi sumberdaya dan musim penangkapan ikan di perairan Teluk Buyat dan sekitarnya. Area penangkapan ikan di perairan Teluk Buyat (4,88 km2). Biomassa ikan ini di Teluk Buyat 0,486 ton/km2. Tangkapan rata-rata bulanan sebesar 0,7 ton, dibandingkan dengan hasil tangkapan maksimum yang lestari dari 2,37 ton/bulan, kemudian tingkat pemanfaatan ikan tuna di Teluk Buyat berada pada 29,59%. Ini berarti bahwa hasil tangkapan yang didaratkan oleh para nelayan Buyat Pante masih berada di bawah eksploitasi. Hasil tangkapan yang diperbolehkan sebesar 80% dari hasil tangkapan maksimum lestari (1,89 ton/bulan). Musim penangkapan tuna di Teluk Buyat terjadi selama enam bulan, yang dimulai dari bulan Maret dan selanjutnya dari bulan Mei hingga September, mengikuti pola musim dua bulan dalam setahun dengan kepadatan tinggi
PENGARUH POSISI TALI UTAMA DAN KECEPATAN ARUS TERHADAP GERAKAN SWINGING DAN DIVING DARI MODEL TROLLING BOARD
Get PDFTrolling board is an important troll line accessory which can produce swinging and diving movements of the lure. A laboratory study on the effect of trolling board main line position and current speed on swinging and diving movements was done in a water circulating tank at the Faculty of Fisheries and Marine Science, Sam Ratulangi University. At low speed, the widest swing reached at main line position near the center of trolling board, but at high speed, it reached main line position near the fore tip. Swinging frequency decreased with the current speed. The depth of diving increased as the main line position got closer to the tip and increased with current speed
KANDUNGAN BAHAN ORGANIK PADA SEDIMEN DI PERAIRAN TELUK BUYAT DAN SEKITARNYA
Get PDFInformation on water conditions, such as sedimentation, physical factors, and coral reef ecosystem, needs to be understood that the stakeholders could optimally utilize the the area. This study was aimed to measure the organic content in the sediment content of Buyat Bay and its surroundings. Results found that the terrestrial sediments had higher percentage than from the surrounding waters
TRANSFER IPTEK KELOMPOK MASYARAKAT HILIR (DOWNSTREAM) DI KELURAHAN KOMO LUAR MANADO
Get PDFThe district of Komo Luar is one of the downstream areas of River Tondano. Based on some researches, performance of physic-chemical parameters show under of Indonesian Water Quality Guidelines e.g. dissolved oxygen, nitrate, phosphate, and e. colii. Knowledge and Technology Transferring has chosen in order to implement the soft approaches. Some programme has been done for example, training related to water quality and awareness campaign. We expected this programme could be modify the way of thinking of people around the river
PENGARUH BEBERAPA CARA KEMATIAN IKAN TERHADAP MUTU IKAN KAKAP (Lutjanus sp.)
Get PDFThe handling of fishery products play an important role in exploiting fisheries production, which began handling the treatment of fish caught, on board, when landed, the market-the market, retailers get to the processing plant. Storage temperature of fish plays an important role when the fish die. the use of low temperatures around 0oC after dead fish can extend the seizures (rigor mortis), lower enzymatic activity, bacterial, chemical and physical changes that can prolong the durable power of fish. How to fish death during arrest have a major influence on the process begins and the end of rigor mortis is consequential to the quality and durable power of fish. This study aims to determine the influence of how the death of fish on fish lasting power during cold storage. benefits of this research can provide information on the manner of death a good fish. Research results snapper fitness level based on organoleptic testing with scores ranging between 4.8 to 50 with an average rating of 50, 45.7, 38.5, 26.2 for treated fish were injected / gancu, 50, 38.1, 10, 5.4 for fish a dead flounder. Research results snapper fitness level based on the value-K test is: 25.78% injection treatment / gancu, 48.99% hit with a wood treatment on the head and the dead fish flounder 50.34%. Fish snapper (Lutjanus sp.) who was arrested dikaramba Likupang waters, the organoleptic and value-K is still suitable for consumption and for processing raw materials