Analisis Akustik Target Strength Penyu Hijau (Chelonia Mydas) Melalui Pengukuran Secara Terkontrol Pada Frekuensi 200 kHz

ABSTRACT Turtles are reptiles that live in the sea and are able to migrate over long distances along the Indian Ocean, Pacific Ocean and Southeast Asia. Currently the number of turtle populations in nature has greatly decreased. This population decline is caused by natural factors and human activities that endanger the population directly or indirectly. At this time the tagging set technique (ID tag code) is a method that is often used to detect the presence of turtles by attaching tags to female turtles who are landing to lay eggs on the beach or while in captivity or the discovery of the mother turtle by fishermen. One other method that can be used to detect the presence of turtles is to use the acoustic method. The purpose of this study was to analyze the characteristics of the acoustic backscattering energy of the green turtle (Chelonia mydes) and to analyze the relationship between target strength and total body length of the green turtle (Chelonia mydas). This research was conducted in the Tapak Paderi waters pond, Bengkulu City, in August-October 2020. The average target strength (TS) value for green turtles was -48.07 dB. Based on the regression equation, the value of determination (R2) obtained is 0.78. Where this value shows that the total length of the green turtle has an effect of 78% on the average target strength (TS) value, while for 22% it is caused by other factors such as body shape, environmental factors and other factors. Based on the ANOVA test, it can be concluded that there is a relationship between the total length and the value of the target strength (TS) on the green turtle or the value of the total length has an influence on the value of the target strength (TS) on the green turtle.

Komposisi dan Frekuensi Kemunculan Jenis Ikan Hasil Tangkapan Bagan Tancap di Tengkolak, Desa Sukakerta, Kabupaten Karawang, Jawa Barat

One of the capture fisheries activities in Tengkolak, Sukakerta Village, West Cilamaya District, Karawang Regency, West Java Province is using the stationery lift nett. The operation of the stationery lift nett itself cannot be separated from fishing aids that use light to attract the fish that are phototaxis positive. The purpose of this study was to determine the composition of the catch and to determine the number of catches based on the stationery lift nett in the waters of Karawang Regency. The benefits of this research can provide benefits to the lift net fishermen in the waters of Karawang Regency and become a reference for policy makers in the local area. Research data collection was carried out on a stationery lift nett operating in the waters of Karawang Regency, West Java. The implementation of the research stationery lift nett in March – May 2021. Sampling was carried out randomly every day based on ships that carried out fishing operations for 38 days, by collecting data on catches directly in the field, both the same and different fishing gear. It was obtained during the research that the fish caught in the stationery lift nett consisted of 9 fish speciess, consisting of anchovies, squid, acetes, sea-pike, dorab wolf, ninis, pony fishes, semadar and yellow-strips trevally. The catch was dominated by rebon (9,650 kg/45.34 %), while the highest frequency of occurrence was anchovy (100%).

Spesifikasi dan Identifikasi Hasil Tangkapan Garok Rajungan di Pelabuhan Perikanan Pantai (PPP) Bondet Kabupaten Cirebon, Jawa Barat

Crayfish (Portunus pelagicus) is the leading export commodity of Indonesian fishermen. The increasing demand for exports and high selling prices have made fishermen at the Bondet Beach Fishing Port, Cirebon Regency, use garok crabs to maximize their catch. The purpose of this study was to identify tool specifications, catch yields, selectivity and productivity of garok crab fishing gear operated at the Bondet Coastal Fishery Port, Cirebon Regency, West Java. The research was carried out in April – June 2021. The method used was a case study method with quantitative descriptive analysis to determine the specifications of the tools and catches taken by interviewing fishermen. The results showed that the crab claws were included in the dredge gear category. Its components consist of body mouth, garok, frame, nets, and ropes of various sizes. The main catch of garok crab in Cirebon Regency consists of small crab (Portunus pelagicus), and by-catch in the form of shellfish, shrimp, cuttlefish, and demersal fish, with a total of 14 species. This tool is classified as non-selective because of the small size of the bag mesh construction (30 mm) so that this tool catches many species with large and small size fish caught. The average catch obtained from 5 trips was 23.8 kg, with the lowest catch on the 2nd trip, which was 19.7 kg and the highest on the 5th trip, which was 31.3 kg, while the average sweep area was 0.0040 km2 with an average productivity of 3.97 kg/hour and the highest catch rate value was obtained on the 5th trip, which was 5.21 kg/hour, while the lowest catch rate was found on the second trip, which was 3.28 kg/hour.

Kajian Hambur Balik Akustik Dari Tukik Penyu Lekang (Lepidochelys olivacea) Melalui Pengukuran Secara Terkontrol Pada Frekuensi 200 kHz

Turtles are marine reptiles that are protected because of their endangered population. The Convention on International Trade in Endangered of Wild Flora and Fauna (CITES) stipulates seven species of sea turtles in the world into Appendix I as endangered, protected and not exploited in any form. The number of hatchlings that managed to reach the sea is currently difficult to know, one method that can be used to detect the presence of hatchlings in nature is by using the acoustic method. This study aims to analyze the backscatter characteristics of the turtle hatchlings and to determine the relationship between backscattering and body length of the turtle hatchlings. The benefits of this research are expected to be able to provide information about the value of backscatter and the relationship to the body length of hatchlings that can be used as a basis for estimating the stock or abundance of hatchlings in nature. This research was conducted in the waters of the Tapak Padri pond, Bengkulu City. The research implementation takes about 3 months, from August to October 2020. Acoustic data processing is carried out at the Marine Acoustic and Resource Exploration Laboratory, Marine Department, FMIPA, Sriwijaya University, Palembang. The results obtained are that the average value of TS ranges from -52.74 to -48.45 dB for hatchlings length of 7-9.3 cm. Based on the regression equation, the coefficient of determination (R2) obtained is 0.57, so it is known that the total length affects the target strength value by 57% and 43% is influenced by other factors. it can be concluded that there is a relationship between the total length of the hatchlings with the TS value of the hatchlings or the total length has an influence on the magnitude of the TS value in the hatchlings.

Faktor-Faktor yang Mempengaruhi Tingkat Kesejahteraan Nelayan Jaring Rampus (Bottom Gill Net) di Pelabuhan Perikanan Pantai (PPP) Bondet Kabupaten Cirebon, Jawa Barat

Bondet Coastal Fishery Port (PPP) is located in Cirebon Regency, which is adjacent to Grogol Village, Gunung Jati District, Cirebon Regency, where Grogol Village is one of the villages as a center for fishing fishermen with fishing gear mostly rampus nets. The rampus net (bottom gill net) is one of the fishing gear that can generate a source of income for fishermen in Grogol Village, Gunungjati District, Cirebon Regency which can be operated and produce fish almost every month. The purpose of this study is to explain the welfare of fishermen which can be analyzed in terms of income and expenditure. Bottom gill net fishermen. The method used in this research is descriptive method. This study uses a survey technique, which is a way of collecting data from a number of units or individuals at the same time. The data obtained were analyzed through financial analysis of the fishing business using rampus nets at the Coastal Fishery Port (PPP) Bondet, Cirebon Regency. The results showed that there was income inequality among Bottom Gill Net fishermen in Grogol village with a Gini coefficient value (inequality) of 0.24. Based on welfare indicators, according to BPS and the results of the summation of scores, it is known that bottom gill net fishermen in Grogol village have a high level of welfare (scores 20-24) with a total score of 23, and based on statistical analysis using NTN, the NTN value for bottom gill net fishermen in Grogol village is equal to 9,6 %, where NTN > 1, it can be stated that all Bottom Gill Net fishermen respondents are prosperous. There is no difference in the final result of the level of welfare according to BPS and NTN.

Tingkat Regenerasi Ekosistem Mangrove Berdasarkan Kerapatan Seedling, Sapling Dan Pohon Di Perairan Sei Jang Kota Tanjungpinang

Tujuan dari penelitian ini untuk mengetahui tingkat kerapatan seedling (semai), sapling (pancang), pohon dan tingkat regenerasi ekosistem mangrove di Perairan Sei Jang Kota Tanjungpinang. Penelitian ini dilaksanakan pada bulan Maret – Agustus 2019 . Penelitian ini dilakukan pada tiga stasiun yang ditentukan dengan metode purposive sampling, berdasarkan keberadaan ekosistem mangrove di Perairan Sei Jang Kota Tanjungpinang. Setiap stasiun dilakukan pengambilan data sebanyak 3 plot, dengan ukuran plot 10x10m untuk pohon, plot berukuran 5x5m untuk sapling dan 2x2 m untuk sub plot seedling. Hasil penelitian ditemukan empat jenis mangrove yaitu Bruguiera gymnorhiza, Rhizophora apiculata, Rhizophora mucronata dan Ceriops tagal. Nilai kerapatan pada stasiun 1 untuk pohon 1.033 ind/ha, sapling 3.200 ind/ha, seedling 30.000 ind/ha, pada stasiun 2 untuk pohon 933 ind/ha, sapling 2.667 ind/ha dan seedling 22.500 ind/ha dan pada stasiun 3 untuk pohon 1.333 ind/ha, sapling 3.333 ind/ha dan seedling 38.333 ind/ha. Tingkat regenersi mangrove pada semua stasiun pengamatan tergolong baik.

Analisis Kelayakan Usaha Penangkapan Ikan dengan Jaring Rampus (Bottom Gill Net) di Desa Bandengan Kecamatan Mundu Kabupaten Cirebon, Jawa Barat

Research was conducted from March to May 2020 at Bandengan Village, Mundu District, Cirebon Regency, West Java. Bandengan Village is a village located on the outskirts of the panatai with the majority of the population being fishermen. The fishing gear used by the fishermen of Bandengan Village includes rampus nets (Bottom Gill Net). Based on the results of the financial analysis including business income analysis, revenue and cost balance analysis, business feasibility analysis, net present value, internal rate of return (IRR) and payback period, the analysis of business income was obtained Rp. 22,346,000, - income and cost balance analysis 1.79, business feasibility analysis with Net Benefit 2.92, with a discount rate of 13%, the value of the catch in years 1 to 10 is Rp. 50,736. 000, -, at the end of the fifth year the remaining machine value is Rp. 1,000,000, -, and at the end of the project value of Rp. 9.500.000, -, consisting of boats Rp. Rp. 2,500,000, -, rampus fishing gear of Rp. 500,000, -, and a machine of Rp. 1,000,000, -, in order to obtain a Net Present Value of Rp. 125,798,041, -, Internal Rate Of Return (IRR) 47.46% and pay back period of 2.86 years. Thus, the use of rampus net fishing gear in Bandengan Village, Mundu District, Cirebon Regency is feasible to be developed, in addition to the higher quality catch, it is also included in environmentally friendly fishing gear.

Analisis Potensi Lestari Hasil Tangkapan Trammel Net Di Kabupaten Indramayu

This study aims to analyze the Catch Per Unit Effort (CPUE) and Maximum Sustainable Yield (MSY) from the catch of trammel net fishing gear by fishermen in Indramayu Regency, West Java. The research method used is descriptive method, which is a method to create a systematic, factual and accurate description of the facts, characteristics and relationships of environmental factors or phenomena being studied. Data analysis was carried out on the catch and catch effort in the last 5 years (2011-2015) on trammel net fishing gear. Trammel net fishing gear is environmentally friendly fishing gear and is an effective fishing tool in fishing productivity with the composition of the catch consisting of the main catch is tiger shrimp (Penaeus monodon) and bycatch such as tigawaja fish (Johnius belangeri), petek Leiognathus bindus) and layur (Trichyurus haumela). The highest annual productivity of trammel net fishing gear during 2011-2015 occurred in 2011 and 2014 at 0.018 tons / trip and the lowest productivity occurred in 2015 at 0.013 tons / trip, and the maximum sustainable catch or MSY in Indramayu Regency was 32147, 1 ton / year, with an estimated optimum fishing effort of 103516.67 trips for one year and R2 of 0.2977. This study aims to analyze the Catch Per Unit Effort (CPUE) and Maximum Sustainable Yield (MSY) from the catch of trammel net fishing gear by fishermen in Indramayu Regency, West Java. The research method used is descriptive method, which is a method to create a systematic, factual and accurate description of the facts, characteristics and relationships of environmental factors or phenomena being studied. Data analysis was carried out on the catch and catch effort in the last 5 years (2011-2015) on trammel net fishing gear. Trammel net fishing gear is environmentally friendly fishing gear and is an effective fishing tool in fishing productivity with the composition of the catch consisting of the main catch is tiger shrimp (Penaeus monodon) and bycatch such as tigawaja fish (Johnius belangeri), petek Leiognathus bindus) and layur (Trichyurus haumela). The highest annual productivity of trammel net fishing gear during 2011-2015 occurred in 2011 and 2014 at 0.018 tons / trip and the lowest productivity occurred in 2015 at 0.013 tons / trip, and the maximum sustainable catch or MSY in Indramayu Regency was 32147, 1 ton / year, with an estimated optimum fishing effort of 103516.67 trips for one year and R2 of 0.2977.

Struktur Komunitas Mangrove di Kelurahan Setapuk Besar Kota Singkawang

Mangrove are plants that can survive in extreme areas with high salinity levels and have an important role for marine organisms. Mangrove are also a parameters that can absorb carbon much higher than other forest types. The purpose of this research was to observe mangrove community structures. This research was conducted from February to March 2020 in the mangrove ecosystem of Setapuk Besar Village. This research was conducted using purposive sampling method which is based on different environmental hues. The results showed that there were 4 types, namely Avicennia marina, Avicennia lanata, Rhizopora stylosa and Rhizopora mucronata. Species of A. marina at tree level have a density value of 66.55 Ind / ha and an Importance Value Index of 300%. Type A. marina at seedling level has a density value of 6266.66 Ind / Ha and an Importance Value Index of 200%. Seedling rate: The highest Importance Value Index for R. stylosa was 127.53%

Analisis Distribusi Hasil Tangkapan Berdasarkan Aktivitas Pasar dan Pemasaran Pelabuhan Perikanan Jawa Tengah

The fishing port has a function as a place for marketing and distribution of fish. Along with the increasing demand for fishery commodities, it is necessary to study the distribution of catches for the realization of the capture fisheries business. This study aims to examine the marketing distribution of catches at fishing ports in Central Java based on market aspects and marketing actors. The research method is a survey method by observing and assessing factors related to the marketing distribution of the catch. The analysis was carried out in a comparative descriptive manner through the presentation of distribution maps and tables. The results showed that the distribution of catches on the north coast of Central Java based on market aspects includes local and regional markets. Distribution of catches based on marketing actors found three patterns. The first pattern of distribution is from fishermen to the Fish Auction Place (TPI) then the collectors/basket traders continue to wholesalers, retailers and consumers. The second pattern is almost the same as the first pattern, except that fish from collectors after being processed or preserved is then continued to retailers and then sold to consumers. The third pattern is the catch from fishermen directly to retailers and then to consumers.