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Abstrak :
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.

Abstrak :
Spiny lobster have been recognized and consumed by the human being, and also own high economic value. In Wonogiri waters, therea arpotential spiny lobster resourceses....

Abstrak :
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. ......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.

Abstrak :
[ABSTRAK
Ikan kurisi merupakan salah satu ikan ekonomis penting di perairan Tangerang dan sekitarnya. Intensitas pemanfaatan sumberdaya ikan kurisi akhirakhir ini semakin meningkat, seiring dengan meningkatnya permintaan akan komoditas ini terutama untuk bahan surimi. Penelitian bertujuan mengkaji aspek biologi ikan kurisi (N. peronii), potensi dan tingkat pemanfaatan, serta optimasi pemanfaatannya di perairan Tangerang. Metode yang digunakan adalah metode survey dengan sampel ikan kurisi pada alat tangkap cantrang dan apollo. Analisis parameter populasi digunakan program FiSAT II dan pengkajian potensi lestari Maximum Sustainable Yield (MSY) dianalisis dengan model surplus produksi. Optimasi pemanfaatan dilakukan dengan analisis Linier Programing. Hasil penelitian menunjukkan pola pertumbuhan ikan kurisi bersifat allometrik negatif. Panjang dan berat ikan kurisi berkorelasi erat. Ukuran panjang pertama kali tertangkap (Lc) 16,34 cm. Parameter pertumbuhan menunjukkan ikan kurisi diperkirakan mampu mencapai panjang 28,03 cm dengan laju pertumbuhan lambat sebesar 0,49 cm per tahun. Laju mortalitas lebih besar disebabkan oleh kematian alami. Tingkat eksploitasi masih berada di bawah nilai optimum dan perlu kehati-hatian dalam pengelolaannya. Pendugaan MSY dan F-Opt sebesar 494 ton/tahun dan 743 unit alat tangkap standar cantrang. Dari analisis optimasi menghasilkan jenis alat tangkap yang direkomendasikan yaitu 743 unit alat tangkap cantrang.

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ABSTRACT
Threadfin bream is one of the important and high economical fish that can be found in Tangerang?s waters and its surounding. The use of threadfin bream increases nowadays, alligned with the increasing demand of these commodities, especially for Surimi. The research is aimed to exercise the biological aspects of threadfin bream (N. peronii); the potential and the number of utilization of it, as well as the optimization of water utilization in Tangerang.The research method used by the writer was a survey method using threadfin bream caught by fishing gear named Cantrang and Apollo as the samples.The writer used FiSAT II program to do the analysis of population parameters, and used a surplus production model to assess the Maximum Sustainable Yield (MSY). Linear Programming Analysis was used to analize the use of optimization. The research?s result showed that the growing pattern of threadfin bream was negative allometric. There was a close correlation between the length and weight of the growing fish with their length when first being caught (Lc) 16.34 cm. Threadfin bream?s growth parameters showed that threadfin bream were expected to grow until 28.03 cm long, with a slow growth rate is 0.49 cm per year. Mortality rate was caused by natural fish death. The level of exploitation below the maximum value, so it needs to be managed prudentially. The estimation of MSY and F - Opt are 494 tons/ year, and 743 units of standard Cangkrang fishing gear. From the analysis of optimization, it produced the types of recommended fishing gears, 743 units of Cantrang fishing gear.;Threadfin bream is one of the important and high economical fish that can be found in Tangerang’s waters and its surounding. The use of threadfin bream increases nowadays, alligned with the increasing demand of these commodities, especially for Surimi. The research is aimed to exercise the biological aspects of threadfin bream (N. peronii); the potential and the number of utilization of it, as well as the optimization of water utilization in Tangerang.The research method used by the writer was a survey method using threadfin bream caught by fishing gear named Cantrang and Apollo as the samples.The writer used FiSAT II program to do the analysis of population parameters, and used a surplus production model to assess the Maximum Sustainable Yield (MSY). Linear Programming Analysis was used to analize the use of optimization. The research’s result showed that the growing pattern of threadfin bream was negative allometric. There was a close correlation between the length and weight of the growing fish with their length when first being caught (Lc) 16.34 cm. Threadfin bream’s growth parameters showed that threadfin bream were expected to grow until 28.03 cm long, with a slow growth rate is 0.49 cm per year. Mortality rate was caused by natural fish death. The level of exploitation below the maximum value, so it needs to be managed prudentially. The estimation of MSY and F - Opt are 494 tons/ year, and 743 units of standard Cangkrang fishing gear. From the analysis of optimization, it produced the types of recommended fishing gears, 743 units of Cantrang fishing gear., Threadfin bream is one of the important and high economical fish that can be found in Tangerang’s waters and its surounding. The use of threadfin bream increases nowadays, alligned with the increasing demand of these commodities, especially for Surimi. The research is aimed to exercise the biological aspects of threadfin bream (N. peronii); the potential and the number of utilization of it, as well as the optimization of water utilization in Tangerang.The research method used by the writer was a survey method using threadfin bream caught by fishing gear named Cantrang and Apollo as the samples.The writer used FiSAT II program to do the analysis of population parameters, and used a surplus production model to assess the Maximum Sustainable Yield (MSY). Linear Programming Analysis was used to analize the use of optimization. The research’s result showed that the growing pattern of threadfin bream was negative allometric. There was a close correlation between the length and weight of the growing fish with their length when first being caught (Lc) 16.34 cm. Threadfin bream’s growth parameters showed that threadfin bream were expected to grow until 28.03 cm long, with a slow growth rate is 0.49 cm per year. Mortality rate was caused by natural fish death. The level of exploitation below the maximum value, so it needs to be managed prudentially. The estimation of MSY and F - Opt are 494 tons/ year, and 743 units of standard Cangkrang fishing gear. From the analysis of optimization, it produced the types of recommended fishing gears, 743 units of Cantrang fishing gear.]

Abstrak :
[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 dengan model 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 309,00 gram. 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. ......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.]

Abstrak :
Secara kuantitas, perikanan demersal adalah produksi utama perikanan pesisir Semarang,. Sedangkan pemanfaatan sumberdaya perikanan Semarang, termasuk sumberdaya ikan demersal, diduga telah mengalami gejala overfishing. Penelitian ini dimaksudkan untuk meneliti gejala overfishing sumberdaya perikanan demersal pesisir Semarang, menganalis s faktor-faklor yang menyebabkan overfishing serta menganalisis tingkat pemanfaatan yang optimal sumberdaya perikanan demersal di perairan pesisir Semarang dengan pendekatan Maximum Sustainable Yield (MSY), Open Access Equilibrium (OAE) dan Maximum Econc mic Yield (MEY). Kegiatan utama penelitian ini dimulai dengan pengumpulan dan penyusunan data Catch per Unit Effort (CPUE) perikanan demersal beserta upaya penangkapan (trip) yang diurutkan secara runtut waktu (time series). Data CPUE dan upaya penangkapan yang digunakan adalah data setelah dilakukan standarisasi alat tangkap dengan alat tangkap dogol sebagai basis. Selanjutnya dilakukan uji stasioneritas terhadap data CPUE perikanan demersal dan upaya penangkapan terstandarisasi. Kemudian dilakukan pendugaan parameter (a dan b), serta survei mengenai rata-rata harga ikan demersal dan biaya per trip alat tangkap dogol. Selanjutnya dilakukan penghitungan tingkat pemanfaatan yang optimal sumberdaya perikanan demersal dengan pendekatan MSY, DAE dan MEY. Hasil penelitian menunjukkan bahwa perikanan demersal pesisir Semarang telah mengalami overfishing yang dimulai pada tahun 1596. Faktor penyebab overfishing adalah operasi penangkapan ikan yang berlebihan, prnggunaar slat tangkap yang tidak ramah lingkungan dan degradasi lingkungan perairan pes sir Serr arang. Berdasarkan pendekatan MSY, tingkat pemanfaatan optimal sumberdaya ikan demersal di perairan pesisir Semarang adalah catch 2.091 tonltahun dan effort 843 trip dogol/tahun, , sedangkan berdasarkan pendekatan UAE, tingkat pemanfaatan optimal adalah catch 127 ton/tahun dan effort 1661 trip dogolltahun, Berdasarkan pendekatan MEY, tingkat pemanfaatan optimal adalah catch 2.090 tonltahun dan effort 830 trip dogolltahun. Pendekatan MEY terbukti paling optimal dalam menghasilkan rente atau profit terbesar dan tetap memperhatikan aspek kelestarian karena tingkat pemanfantannya tidak melampaui MSY.