JURNAL PERIKANAN DAN KELAUTAN TROPIS
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PENGARUH MINYAK CUMI PADA UMPAN BUBU DASAR TERHADAP HASIL TANGKAPAN IKAN-IKAN KARANG
Get PDFBottom trap have been used widely by coastal communities in North Sulawesi to catch coral fishes, since it simple in design, cheaper and easy to manage with a small boat. Unfortunately, the fishing practice of the traditional trap is usually conducted in destructive way, where fishermen cover the gear with live coral to attract fishing target. Although the gear’s design has evolved over centuries, there is still potential for improving its catching efficiency and selectivity. An attempt to understand the fishing process of bottom trap should therefore be focused on bait and how its chemical composition, visual and physical properties may stimulate target species to attack the bait and captured. Addition of squid liver oil to the bait could increase the fishing power of bottom trap gear. But scientific information’s about its applications are not available yet. Therefore, the objective of this research was to study the effect of squid liver oil on bait of bottom trap toward the capture of coral fishes. This research was done in Bangka Strait North of Minahasa, based on experimental method. Six units of bottom trap (bamboo) were operated ten nights in collecting data; where tree units of them used scad mackerel bait that injected by squid liver oil, and tree other units just used scad mackerel bait without squid liver oil; and the capture data were analyzed by ttest. The catch was 117 fish in total consist of 2 genera; 74 fish was caught by scad mackerel bait with squid liver oil, and 43 fish was caught by bait without squid liver oil. Analysis of ttest show that t0= 8.908>t0.05; 5= 3.250; which means that the addition of squid liver oil on bait could increase the catch of bottom trap
POTENSI JENIS-JENIS IKAN AIR TAWAR KONSUMSI MASYARAKAT ALIRAN SUNGAI DIGOEL, KABUPATEN BOVEN DIGOEL, PAPUA, DAN BEBERAPA LANGKAH PENGELOLAANNYA
Get PDFThis study aimed at providing information on freshwater fish living in Digoel River, Boven Digoel Regency, Papua, edible for local people and some management options. Data were collected from observing the fishing activities and Tanah Merah market, and through personal interviews as well. Results showed that there were about 23 species of native and introduced fish living in the Digoel River. Native fish population is decreasing as a result of forest clear cut, pollution, irrational fishing and predation. Therefore, management actions should be taken
PERBEDAAN PENGGUNAAN INTENSITAS CAHAYA LAMPU TERHADAP HASIL TANGKAPAN BAGAN APUNG DI PERAIRAN SELAT ROSENBERG KABUPATEN MALUKU TENGGARA KEPULAUAN KEI
Get PDFOne of potential fishing grounds for small pelagic fish in Southeast Mallucas Regency is Rosenberg Strait waters. In this region, a study on the effect of different light intensities of floating lift net on fish catches was carried out. The analyses were done on light distribution of 4 light intensities different: Petromaks Lamp and Underwater Lamps of each 18 watt, 36 watt and 54 watt. This study showed that catches of floating lift net using different light intensities were statistically significantly different. The use of 36 watt and 54 watt underwater lamp yielded the same amount of catches but higher than that of 18 watt-underwater lamp and petromaks, both in number and species. Catches consisted of 17 species, 16 fishs and 1 mollusca. Number of species and size also varied with light intensity used. There were 13 fishs species dominated by Stolephorus indicus as much as 46.9 kg or 22% for petromaks catches, 14 fishs species dominated by Rastrelliger kanagurata as much as 64 kg (31%) for 18 watt underwater lamp, 17 fishs species dominated by Rastrelliger kanagurata as much as 76 kg (28%) for 36 watt underwater lamp, and 15 fishs species dominated by Stolephorus devisi as much as 54.8 kg (22%) for 54 watt underwater lamp, respectively. Based on the results, it is recommended that the use of light intensity in fishing operations of floating lift net should be 36 watt and 54 watt underwater lamps, due to high catches, both in number and species. Beside that, since light fishing has also caught illegal fish size, number of this fishing gear type should be controlled
STABILITAS STATIS KAPAL IKAN TIPE LAMBUT TERSANJUNG YANG BERPANGKALAN DI PELABUHAN PERIKANAN SAMUDERA AERTEMBAGA KOTA BITUNG PROPINSI SULAWESI UTARA
Get PDFShip is water vehicle with any shape and any purpose, mechanically powered or by windvor tug and categorized as a multipurpose platform. It could be operated underwater or in the surface of water and could function merely as a floating static structure. The natural condition is the fish catching area are unpredictable as the wave an current of the water could disturbing the maneuverability and the stabilty of the ship. For that purpose the fish catching ship should have and meet the criterion of robust construction and strong structure to deal with the extreme condition in the sea and also should have a good maneuverability and enough power to make it move steadily. The total lenght of the sample ship Tersanjung are 15.85 m, the width are 2.90 m and inside the ship measured as 1.32 m. The average comparison among the 3 parameters are 5.50 for L/B, 13.05 for L/D and 2.37 for B/D. The coefficient of the Tersanjung ship are Cb=0.58, Cp=0.96, C =0.60 and Cw=0.87. “Tersanjung†ship has reverse velocity 3.7 second (1 perod). Maximum rolling reaching at 120 with righting moment of 0.21 m
MEMAKSIMALKAN POTENSI DORMANSI PADA ROTIFER Brachionus rotundiformius MELALUI MATING EKSPERIMEN
Get PDFThe rotifer Brachionus sp is widely used in aquaculture as a live prey, but problem remain with less utilization. It is often difficult to synchronize rotifer production with larvae demand. Rotifer also produce resting egg with sexual reproduction, this resting egg is thick-walled encysted stages which can remain dorman for extended period. Used resting egg as a stock can be solved the problem. With mating eksperiment we found resting egg produced by female rotifer that have not produce egg before.  Suggestion proportion of male and female to produce resting egg is 4 male : 10 female
IDENTIFIKASI DAN ANALISIS MODAL SOSIAL DALAM RANGKA PEMBERDAYAAN MASYARAKAT NELAYAN DESA GANGGA DUA KABUPATEN MINAHASA UTARA
Get PDFThis research which aimed to identified and analyzed social capital of fisheries communities in Gangga dua village, North Monahasa District, has been conducted in 2007. Socio-culture data collected from fisheries community is consist of local value and local value system, local religious, pattern and system of production and reproduction and local politics. Data was collected by snowball sampling from community members who have deep knowledge about socio-culture of their community themselves. After data collected shown the socio-culture character of fisheries community then it has been analyzed to show the social capital typology. The research shows that fisheries community in Gangga Dua village still become closed community or has a characteristif of social capital bounding. Need a policy related to social structure improvement because of the social capital typology's of fisheries community in Pasauran village has been big influenced by various of economic aspect in economic activity of their life
IDENTIFIKASI Vibrio sp PADA GONAD IKAN CAKALANG (Katsuwonus pelamis L)
Get PDFThis research was conducted to identify the presence of Vibrio sp. at the gonads of fresh and smoked skipjack tuna.  The method used in this research is descriptive method with the parameters examined, ie total bacteria, total Vibrio, morphology and biochemical tests. Results showed that the total value of Vibrio in fresh skipjack tuna gonad highest TVC 1.1x105/g and the lowest is 2.0x103 TVC/gr.  While the smoke skipjack tuna gonad bacterial growth does not occur.  The identification results found 43 strains of Vibrio sp., (7 strains), Vibrio fluvialis (2 strains), Vibrio cincinnatiensis (4 strains), Vibrio damsela (2 strains), Vibrio metschnikovii (1 strain) and 27 other strains was not identified
UJI LARVASIDA NYAMUK (Aedes aegypti) DARI ASCIDIAN (Didemnum molle)
Get PDFDengue haemorrhagie fever is one of the disease which caused by dengue virus. It spreads out by mosquito Aedes aegypti as the vector. To date, people use abate as the larvacidal. Yet it causes the negative effects, such as bad odor, rustiness of the water container and resistency either to the larvae or to the living environment if continue using it. The objective of the research was to examine the larvacidal activity of Didemnum molle extract against A. aegypti larvae. The sample was extracted with methanol to give methanolic extract which was further partitioned with ethyl acetate, hexane, and chloroform to yield three fractions of ethyl acetate, hexane, and chloroform. Methanolic extract and the three fractions were tested against the A. aegypti larvae instar III for several concentrations. Abate and tap water were used as controls. The result exhibited that Didemnum molle extracts contain or produce larvacidae substances against A. aegypti larvae. They are approved by the data of methanolic extract and the 3 fractions which are more powerful than abate, particularly hexane. However it still needs to be purified to obtain single active compound
PENERIMAAN KONSUMEN TERHADAP SELAI RUMPUT LAUT (Kappaphycus alvarezii)
Get PDFSeaweed jam can be made by dry seaweed or fresh seaweed. Research result indicated that dry seaweed jam and fresh seaweed jam can be accepted by consumer. In the tekstur and color perspective, dry seaweed jam and fresh seaweed jam in the good graces (point 4), whereas in smell perspective, both of the jam rather in the good graces (point 3). Taste of the dry seaweed jam is in the good graces (point 4) whereas fresh seaweed jam rather in the good graces (point 3) by consumer
SEDIMEN LARUT DALAM ASAM DAN TIDAK LARUT DALAM ASAM 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 at determining the sediment content of Buyat Bay and its surroundings dissolved and undissolved in the acid solution. Results found that the terrestrial sediments (Lithogenous) were not soluble in the acid solution and the marine ones (Biogenous) were soluble