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"Fenomena penurunan sumberdaya ikan layur di perairan Cilacap dan sekitarnya terjadi disebabkan peningkatan laju eksploitasi.tanpa mempertimbangkan dinamika atau perubahan stok ikan dan aspek optimasi pemanfaatan. Penelitian ini bertujuan untuk mengkaji dinamika populasi ikan layur tingkat pemanfaatan, dan optimasi pemanfaatannya di perairan Cilacap dan sekitarnya. Penelitian dilaksanakan di PPS Cilacap dan lokasi penelitian di perairan Cilacap dan sekitarnya dari bulan April 2013 sampai Juni 2014. Metode yang digunakan adalah metode survey dengan pengambilan ikan layur yang tertangkap oleh alat tangkap jaring sirang dan jaring payang. Analisis dinamika populasi digunakan program FiSAT II dan pengkajian potensi lestari dianalisis dengan model surplus produksi dalam menentukan Maximum Sustainable Yield (MSY). Sementara optimasi pemanfaatan dilakukan dengan analisis Linier Programing terhadap aspek-aspek yang terkait dengan pemanfaatan ikan layur. Kisaran panjang total dan modus panjang 13-77 cm dan 51 cm. Ikan layur allometrik negatif, dengan nilai Lc < Lm yang menunjukkan sebagian besar ikan layur yang tertangkap dengan alat tangkap yang digunakan di perairan selatan Cilacap belum memijah / belum dewasa. Nilai parameter pertumbuhan adalah L∞ = 80,85 cm, K= 0,70 per tahun, to= -0,1748, Z = 2,18 per tahun, M = 1,07 per tahun, F = 1,11 per tahun, dan E = 0,51. Nilai menunjukkan tingkat pemanfaatan sudah fully exploited. Pendugaan MSY dan F-Opt sebesar 626,318 ton/tahun dan 1.173 unit dengan alat tangkap standar jaring sirang. Skenario optimasi menghasilkan jenis alat tangkap yang direkomendasikan yaitu 1.173 unit alat tangkap jaring sirang dengan keuntungan Rp. 78,3 milyar per tahun.

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The phenomenon occurs due to a decrease of hairtai resources in Cilacap water area because eksploitation without consider increasing the rate or change the dynamics of fish stocks and utilization optimization aspects. This study aims to examine the dynamics of hairtail populations utilization rates and utilization optimization in Cilacap area and the surrounding waters. Research carried out in the PPSC (Pelabuhan Perikanan Samudera Cilacap) and research sites in Cilacap and surrounding waters from April 2013 to June 2014. Methods used is a survey method with hairtail fishing gear caught by sirang nets (gillnet monofilament) and payang nets (denish seine). Analysis of population dynamics used FiSAT II program and assessment of the potential sustainable surplus production models were analyzed with Maximum Sustainable Yield (MSY) in determining. While optimization is done with the use of Linear Programming analysis of aspects related to the use of hairtail. Range in total length and long mode 13-77 cm and 51 cm. Hairtail is negative allometric, with a value of Lc < Lm which shows hairtail caught with fishing gear used in Cilacap and surrounding waters not spawn / immature. Growth parameter values L∞ = 80.85 cm, K 0.70 = per year, to = -0.1748, Z = 2.18 per year, M = 1.07 per year, F = 1, 11 per year, and E = 0.51. Value indicates the level of utilization has been fully exploited. Estimation of MSY and f-Opt for 626.318 tons / year and 1,173 units with standard fishing gear is gill net sirang. Scenario optimization produces the type of fishing gear is recommended that 1,173 units of gillnet sirang with a net profit Rp 40.9 billion per year."

"[ABSTRAKTerdapatnya upaya tangkap udang dogol (Metapenaeus ensis, De Haan1844 ) di perairan Cilacap dan sekitarnya yang berlebih maka perlu dilakukanpenelitian yang bertujuan untuk mengkaji dinamika populasi, tingkat pemanfaatandan optimasi pemanfaatan udang dogol di perairan Cilacap dan sekitarnya.Penelitian dilaksanakan di perairan Cilacap dan sekitarnya dari bulan Januari 2013sampai Desember 2014. Metode yang digunakan adalah metode survei denganpengambilan sampel udang dogol yang tertangkap oleh alat tangkap arad dantrammel net. Analisis dinamika populasi menggunakan program FiSAT II danpengkajian potensi lestari dianalisis dengan menggunakan model surplus produksidalam menentukan Maximum Sustainable Yield (MSY). Optimasi pemanfaatandilakukan dengan analisis Linier Programming terhadap aspek-aspek yang terkaitdengan pemanfaatan udang dogol.Udang dogol di perairan ini memiliki pola pertumbuhan allometrik negatif,dengan nilai Lc > Lm yang menunjukkan sebagian besar udang dogol yang tertangkapdi perairan ini sudah memijah. Nilai parameter pertumbuhan yaitu L∞: 55.8 mm, K:1,18 per tahun, to: 0,1129, Z: 7,09 per tahun, M: 0,8 per tahun, F: 6,29 per tahun, danE: 0,88. Nilai E menunjukkan tingkat pemanfaatan sudah melebihi batas ekploitasidan sudah terjadi overfishing. Pendugaan MSY dan f-Opt sebesar 57 ton/tahun dan392 unit alat tangkap standar trammel net. Skenario optimasi pemanfaatan udangdogol di perairan Cilacap dan sekitarnya yang paling menguntungkan dan lestariadalah dengan mengoperasikan 392 unit jaring trammel net dengan keuntungan Rp.35,2 milyar per tahun.

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ABSTRACTThere were an excessive fishing effort of greasyback shrimp (MetapenaeusEnsis, De Haan 1844) in Cilacap Waters, so it is necessary to study the populationdynamics, the level of utilization and optimization of greasyback shrimp in Cilacapwaters. Research was conducted in Cilacap and surrounding waters from January2013 to December 2014. The method used was survey method using samples ofGreasyback Shrimp that were caught by fishing gear Arad and trammel net. Analysisof population dynamics used FiSAT II program. Assessment of the maximumsustainable yield was analyzed using surplus production models in order to determinethe Maximum Sustainable Yield (MSY). The optimization of the utilization of LinearProgramming was done using analysis of aspects related to the use of greasybackshrimp.Greasyback Shrimp growth in the Cilacap waters moreover negativeallometric, with a value of Lc> Lm which show that most of Greasyback Shrimpcaught with fishing gear used in waters Cilacap already in spawning condition. Valueof growth parameters L∞: 55.8 mm, K: 1.18 per year, to: 0.1129, Z: 7.09 per year,M: 0.8 per year, F: 6.29 per year, and E: 0.88. The value of E indicate that theutilization rate has exceeded the limits of exploitation (overfishing). Base on surplusproduction models analysis estimation of MSY was 57 tons / year while f-Opt forand 392 units using standard trammel net fishing gear. Optimization scenarios ofGreasyback Shrimp in the Cilacap waters was the use of the most profitable andsustainable ways to operate 392 units trammel nets with a net profit of Rp. 35.2billion per year, There were an excessive fishing effort of greasyback shrimp (MetapenaeusEnsis, De Haan 1844) in Cilacap Waters, so it is necessary to study the populationdynamics, the level of utilization and optimization of greasyback shrimp in Cilacapwaters. Research was conducted in Cilacap and surrounding waters from January2013 to December 2014. The method used was survey method using samples ofGreasyback Shrimp that were caught by fishing gear Arad and trammel net. Analysisof population dynamics used FiSAT II program. Assessment of the maximumsustainable yield was analyzed using surplus production models in order to determinethe Maximum Sustainable Yield (MSY). The optimization of the utilization of LinearProgramming was done using analysis of aspects related to the use of greasybackshrimp.Greasyback Shrimp growth in the Cilacap waters moreover negativeallometric, with a value of Lc> Lm which show that most of Greasyback Shrimpcaught with fishing gear used in waters Cilacap already in spawning condition. Valueof growth parameters L∞: 55.8 mm, K: 1.18 per year, to: 0.1129, Z: 7.09 per year,M: 0.8 per year, F: 6.29 per year, and E: 0.88. The value of E indicate that theutilization rate has exceeded the limits of exploitation (overfishing). Base on surplusproduction models analysis estimation of MSY was 57 tons / year while f-Opt forand 392 units using standard trammel net fishing gear. Optimization scenarios ofGreasyback Shrimp in the Cilacap waters was the use of the most profitable andsustainable ways to operate 392 units trammel nets with a net profit of Rp. 35.2billion per year]"

"[Ikan layur merupakan salah satu komoditas penting dalam perikanan tangkap di Palabuhanratu. Penelitian ini bertujuan menentukan populasi dan potensi ikan layur. Metode yang digunakan ialah data surplus produksi. Data ikan dibutuhkan untuk menggambarkan dinamika suatu populasi ikan yang dipengaruhi oleh pertumbuhan, mortalitas, dan migrasi ikan. Dinamika populasi dianalisis dengan paket perangkat lunak FISAT II dan pengkajian potensi lestari dianalisis denganmodel surplus produksi MSY. Hasil pengamatan Agustus-September 2014 menunjukkan perubahan kisaran panjang ikan dari kisaran 44,00?96,80 cm menjadi 47,00?97,99 cm dan berat rata-rata ikan berubah dari 285,33 gram menjadi 309,00gram. Perubahan panjang ikan ini karena ikan mengalami proses pemijahan. Hasil estimasi pada waktu pengamatan memperlihatkan bahwa laju eksploitasi populasi ikan layur belum mencapai tangkap lebih (overfishing) dengan nilai batas tingkat penangkapan dibawah optimum 0,50. Dalam rangka mewujudkan perikanan layur berkelanjutan, disarankan menetapkan musim penangkapan, penambahan upaya dan wilayah tangkapan, serta pendataan berbasis spesies.

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Hairtail is one of the important fish catches in Palabuhanratu waters. This

study aims to determine the populations and potential of hairtail. To achieve these

objectives, it required accuracy and precision data. Data of fish are needed to describe

the dynamics of a fish population which influenced by fish growth, mortality, and

migration. The population dynamics is analyzed with FISAT II software package and potential sustainable surplus production is analyzed with MSY production surplus model. The observation result from August to September 2014 showed that fish length range has changed from 44.00-96.8 cm to 47.00-97.99 cm. In similar period, the average weight also changed from 285.33 gram to 309.00 gram. The length changes are apparently due to the process of spawning. Based on the observation, the estimation result shows that the speed of exploitation of hairtail population is yet to reach overfishing fisheries, suggested to fix the fishing season, adding the efforts and fishing zone, also data collection based on species. Hairtail is one of the important fish catches in Palabuhanratu waters. This study aims to determine the populations and potential of hairtail. To achieve these objectives, it required accuracy and precision data. Data of fish are needed to describe the dynamics of a fish population which influenced by fish growth, mortality, and

migration. The population dynamics is analyzed with FISAT II software package and potential sustainable surplus production is analyzed with MSY production surplus model. The observation result from August to September 2014 showed that fish length range has changed from 44.00-96.8 cm to 47.00-97.99 cm. In similar period, the average weight also changed from 285.33 gram to 309.00 gram. The length changes are apparently due to the process of spawning. Based on the observation, the estimation result shows that the speed of exploitation of hairtail population is yet to reach overfishing fisheries, suggested to fix the fishing season, adding the efforts and fishing zone, also data collection based on species.;Hairtail is one of the important fish catches in Palabuhanratu waters. This

study aims to determine the populations and potential of hairtail. To achieve these

objectives, it required accuracy and precision data. Data of fish are needed to describe

the dynamics of a fish population which influenced by fish growth, mortality, and

migration. The population dynamics is analyzed with FISAT II software package and

potential sustainable surplus production is analyzed with MSY production surplus

model. The observation result from August to September 2014 showed that fish

length range has changed from 44.00-96.8 cm to 47.00-97.99 cm. In similar period,

the average weight also changed from 285.33 gram to 309.00 gram. The length

changes are apparently due to the process of spawning. Based on the observation, the

estimation result shows that the speed of exploitation of hairtail population is yet to

reach overfishing fisheries, suggested to fix the fishing season, adding the efforts and

fishing zone, also data collection based on species., Hairtail is one of the important fish catches in Palabuhanratu waters. This

study aims to determine the populations and potential of hairtail. To achieve these

objectives, it required accuracy and precision data. Data of fish are needed to describe

the dynamics of a fish population which influenced by fish growth, mortality, and

migration. The population dynamics is analyzed with FISAT II software package and

potential sustainable surplus production is analyzed with MSY production surplus

model. The observation result from August to September 2014 showed that fish

length range has changed from 44.00-96.8 cm to 47.00-97.99 cm. In similar period,

the average weight also changed from 285.33 gram to 309.00 gram. The length

changes are apparently due to the process of spawning. Based on the observation, the

estimation result shows that the speed of exploitation of hairtail population is yet to

reach overfishing fisheries, suggested to fix the fishing season, adding the efforts and

fishing zone, also data collection based on species.]"

"Fenomena penurunan sumberdaya Rajungan di perairan Cirebon dan sekitarnya terjadi disebabkan peningkatan laju eksploitasi tanpa mempertimbangkan dinamika atau perubahan stok ikan dan aspek optimasi pemanfaatan. Penelitian ini bertujuan untuk mengkaji dinamika populasi rajungan, tingkat pemanfaatan, dan optimasi pemanfaatannya di perairan Cirebon dan sekitarnya. Penelitian dilaksanakan di Cirebon dan lokasi penelitian di perairan Cirebon dan sekitarnya dari bulan April ndash; Juni 2016. Metode yang digunakan adalah metode survey dengan pengukuran rajungan yang tertangkap oleh alat tangkap bubu dan jaring insang. Analisis dinamika populasi digunakan program FiSAT II dan pengkajian potensi lestari dianalisis dengan model surplus produksi dalam menentukan Maximum Sustainable Yield MSY. Sementara optimasi pemanfaatan dilakukan dengan analisis Linier Programing terhadap aspek-aspek yang terkait dengan pemanfaatan rajungan.Kisaran lebar karapas rajungan berkisar antara 77,5 ndash; 157,5 mm. Pola pertumbuhan bersifat allometrik negatif, dengan nilai Lc > Lm yang menunjukkan sebagian besar rajungan yang tertangkap dengan alat tangkap yang digunakan di perairan selatan Cirebon sudah memijah/dewasa. Nilai parameter pertumbuhan adalah L infin; 170 mm, K = 1,15 per bulan untuk rajungan jantan sedangkan rajungan betina L infin;177,25 mm, K = 1,1 per bulan, Z = 1,92 per tahun, M = 1,23 per tahun, F = 0,69 per tahun, dan E = 0,36 rajungan jantan dan Z = 2,94 per tahun, M =1,18 per tahun, F= 1,76 per tahun dan E = 0,60 pertahun rajungan betina. Nilai menunjukkan tingkat pemanfaatan sudah fully exploited. Pendugaan MSY dan F-Opt sebesar 3.124 ton/tahun dan 433 unit dengan alat tangkap standar bubu. Skenario optimasi menghasilkan jenis alat tangkap yang direkomendasikan yaitu 433 unit alat tangkap bubu dengan keuntungan Rp. 6,9 milyar per tahun.

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The phenomenon of Blue swimming crab decrease due to because of exploitation occurs in Cirebon water. It will change the dynamics stocks of fish and utilization optimization aspects. This study aimed to examine the dynamics of blue swimming crab populations utilization rates and utilization optimization in Cirebon area and the surrounding waters. Research was carried out in Cirebon and surrounding waters from April to June 2016. Methods used was a survey method by measuring Blue Swimming Crab caught using fishing gears gillnet and collapsible traps . Analysis of population dynamics used FiSAT II program and assessment of the potential sustainable surplus production models were analyzed using Maximum Sustainable Yield MSY . Optimization was done using Linear Programming analysis of aspects related to the use of fishing gears and blue swimming crab caught. Range carapace wide for all crabs was 77,5 mm to 157,5 mm. Condition Growth Blue Swimming Crab is negative allometric with parameter values for male were L infin 170 mm, K 1,15 per month and for female L infin 177,25 mm, K 1.1 per month, , with a value of Lc Lm, the indicate that Blue Swimming Crab caught with fishing gear used in Cirebon and surrounding waters was an spawn mature. Mortality value for male were Z 1,92 per year, M 1,23 per year, F 0,69 per year, and E 0,36 and for female Z 2,94 per year, M 1,18 per year, F 1,76 per year and E 0.60 per year. The level of utilization has been fully exploited. Estimation of MSY and f Opt was 3.124 tons year while 433 units with standard fishing gear is collapsible traps. Scenario optimization produces type of fishing gear that are recommended was 433 units of collapsible traps with a net profit Rp 6,9 billion per year."

"Perairan Cilacap dan sekitarnya merupakan salah satu daerah penangkapan udang jerbung yang sangat potensial di perairan pantai selatan Jawa. Trend indeks kelimpahan stok udang jerbung di perairan Cilacap dan sekitarnya cenderung menurun pada periode tahun 2004-2010. Hal ini sangat mengkhawatirkan terhadap keberlanjutan produksi udang jerbung apabila tidak ada pengelolaan dan pemanfaatan sumberdaya udang tersebut dengan baik. Penelitian ini dilaksanakan di Cilacap dan sentra perikanan udang lainnya di Kabupaten Cilacap pada Januari sampai dengan November 2013. Data dikumpulkan melalui metode survey dan wawancara. Metode analisis terdiri dari metode analitik menggunakan Program FiSAT II, dan model surplus produksi. Udang jerbung yang tertangkap dominan pada mid length 31 mm, 33 mm, dan 35 mm, dan umumnya belum dewasa. Nilai faktor kondisi udang jerbung betina dan jantan masing-masing berkisar 37,36-648,87 dan 15,55-319,05. Laju pertumbuhan (K) udang jerbung betina 1,10 per tahun dan udang jerbung jantan 1,00 per tahun. Laju eksploitasi (E) udang jerbung betina 0,36 per tahun dan udang jerbung jantan 0,56 per tahun. Laju mortalitas total (Z) udang jerbung betina 1,69 per tahun dan udang jerbung jantan 2,46 per tahun. Pola rekruitmennya menunjukkan 2 modus dalam satu tahun, dengan puncak terjadi pada periode Maret-April dan periode Juli-Agustus. Estimasi potensi lestari (MSY) dan f-opt udang jerbung di perairan Cilacap 326 ton/tahun dan effort optimum (f-opt) 231 trip serta tingkat pemanfaatan sudah berada pada tahap overfishing.

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Cilacap and surrounding waters is one of the potential fishing ground of banana prawn in south of Java sea. Abundance stock index of banana prawn in Cilacap and surrounding waters tend to decline in 2004-2010. It was apprehension for the banana prawn sustainability, when no appropriate management and utilization for this species. This research conducted in Cilacap and other shrimp fisheries centers in Cilacap District begin from January until November 2013. Data collected through a survey and interview methods. The method of analysis consists of : an analytical method by FiSAT II program, and surplus production models. Most of Banana prawn caught dominantly in the mid length 31 mm, 33 mm, and 35 mm, and generally immature. Value factor condition banana prawn females and males respectively ranged from 37.36-648.87 and 15.55-319.05. Growth rate (K) of banana prawn female was 1.10 per year and banana prawn male was 1.00 per year. The exploitation rate (E) of banana prawn female was 0.36 per year and banana prawn male was 0.56 per year. Total mortality rate (Z) of banana prawn female was 1.69 per year and banana prawn male was 2.46 per year. The pattern of recruitment showed two models in one year, with the peak season occur in the period of March-April and July-August. Estimation of the Maximum Sustainable Yield (MSY) and f-opt banana prawn in Cilacap waters about 326 tons/year and optimum effort (f-opt) about 231 trips, and the utilization rate toward to overfishing level."

"Data of Dipterocarpaceae species have been extracted from 8 studied plots of 1-ha each, distributed in three types of natural forest in Kalimantan (those were 4 plots in mixed dipterocarps forest, 2 plots in peat swamp forest and 2 plots in heath forest types ) for further population analysis...."