scholarly journals Ketaatan Kapal Penangkap Jaring Insang di Laut Arafura yang Berpangkalan di Pelabuhan Perikanan Samudera Bitung (The obedience gill nets boats in the Arafura Sea that based in Bitung Oceanic Fisheries Port)

2017 ◽  
Vol 2 (4) ◽  
Author(s):  
Bahrul Y. N. I. Syah ◽  
Lefrand Manoppo ◽  
Emil Reppie
Keyword(s):  
Fishing Ground ◽  
Gill Nets ◽  
Fisheries Resources ◽  
Gill Net ◽  
Arafura Sea ◽  
Descriptive Method

Arafura Sea waters are one of the good fishing ground for gill net boats over than 30 GT.Currently, there are 14 gill nets boats that fishing in these waters and are based in Bitung Oceanic Fisheries Port.Therefore, it is necessary to study the boat obedience-based during fishing activities. This study aimed to evaluate compliance gill net vessels based in Bitung Oceanic Port according long days operation in each trip and port based.  This research was conducted from August to September 2015 in Marine and Fisheries Resources Supervision Base and Bitung Oceanic Fisheries Port; and done with descriptive method.  Results of the analysis showed that 79% of gill net boats based in Bitung Oceanic Fisheries Port disobedient in day fishing operations; and 14% of the boats did not obey the appropriate port based.Key words: Gill net, Arafura Sea, obedience day operations, obedience-port based ABSTRAKPerairan Laut Arafura merupakan salah satu fishing ground yang cocok untuk pengoperasian jaring insang dengan kapal berukuran di atas 30 GT. Saat ini terdapat 14 kapal jaring insang yang menangkap ikan di perairan tersebut dan berpangkalan di Pelabuhan Perikanan Samudera  Bitung. Oleh karena itu, perlu di lakukan kajian mengenai ketaatan berpangkalan kapal–kapal tersebut saat melakukan kegiatan perikanan. Penelitian ini bertujuan untuk mengevaluasi ketaatan kapal jaring insang yang berpangkalan di Pelabuhan Perikanan Samudera Bitung berdasarkan lama hari operasi dalam setiap trip dan pelabuhan pangkalan.  Penelitian ini dilakukan pada bulan Agustus sampai September 2015 di Pangkalan Pengawasan Sumberdaya Kelautan dan Perikanan Bitung dan Pelabuhan Perikanan Samudera Bitung; dikerjakan dengan metode deskriptif.  Hasil analisis menunjukan bahwa 79% kapal jaring insang yang berpangkalan di Pelabuhan Perikanan Samudera Bitung tidak taat menurut hari operasi penangkapan; dan 14% kapal tidak taat sesuai pelabuhan pangkalan. Kata kunci: Jaring insang, Laut Arafura, ketaatan hari operasi, ketaatan berpangkalan

scholarly journals PROFIL PERIKANAN TUNA DAN CAKALANG DI INDONESIA

2019 ◽  
Vol 4 (1) ◽  
pp. 23
Author(s):  
Maulana Firdaus
Keyword(s):  
Statistical Data ◽  
Secondary Data ◽  
Fishing Ground ◽  
Skipjack Tuna ◽  
North Sulawesi ◽  
Long Line ◽  
West Sumatra ◽  
Arafura Sea ◽  
Scientific Report ◽  
Descriptive Method

Indonesia memegang peranan penting dalam perikanan Tuna, Tongkol dan Cakalang di dunia. Indonesia telah memasok lebih dari 16% produksi Tuna, Tongkol dan cakalang dunia. Tuna dan cakalang memiliki peranan penting bagi sektor perikanan tangkap di Indonesia sehingga pengetahuan tentang profil perikanan Tuna dan cakalang menjadi sangat penting untuk diketahui. Kajian yang dilakukan pada tahun 2017 ini bertujuan untuk mendeskripsikan profil perikanan Tuna dan cakalang di Indonesia yang akan dikemukakan berdasarkan penelurusan data sekunder berupa data statistik, laporan penelitian dan publikasi ilmiah terkait perikanan Tuna dan cakalang di Indonesia yang dianalisis secara deskriptif. Hasil kajian menunjukkan bahwa perikanan Tuna dan cakalang di Indonesia terdiri jenis yaitu industri dan artisanal. Daerah penyebaran ikan Tuna dan  cakalang meliputi  Laut Banda, Laut Maluku, Laut Flores, Laut Sulawesi, Laut Hindia, Laut Halmahera, perairan utara Aceh, barat Sumatera, selatan Jawa, utara Sulawesi, Teluk Tomini,  Teluk  Cendrawasih  dan  Laut  Arafura. Produksi Tuna dan cakalang terus meningkat sejak tahun 2000 sampai dengan tahun 2015. Peningkatan produksi Tuna dan cakalang menunjukkan bahwa tingginya tingkat permintaan terhadap kedua komoditas tersebut. Alat tangkap yang digunakan untuk menangkap Tuna dan cakalang sangat beragam yang dapat dikelompokkan menjadi 6 jenis, yaitu rawai Tuna (Tuna long line), rawai hanyut selain rawai Tuna (drift longline other than Tuna long line), rawai tetap (set long line), huhate (skipjack pole and line), pancing tonda (troll line) dan pancing yang lain (other pole and line)Title: The Profile of Tuna and Cakalang Fishery in IndonesiaIndonesia plays an important role in Tuna and Skipjack fisheries in the world due to its supply of  more than 16% of the world’s Tuna and skipjack production. Since they have been being a vital commodity in capture fisheries in Indonesia, it is important to have knowledge of Tuna and skipjack fisheries. This study was conducted in 2017 and it aims to describe the profile of Tuna and skipjack in Indonesia that built upon secondary data. The data were collected from statistical data, scientific report and publication related to Tuna and skipjack fisheries in Indonesia and they were analyzed using descriptive method. The results suggest that Tuna and skipjack fisheries in Indonesia consist of industrial and artisanal types. The fishing ground of Tuna and skipjack covering Banda Sea, Maluku Sea, Flores Sea, Sulawesi Sea, Indian Ocean, Halmahera Sea, Northern Aceh Sea, West Sumatra, South Java, North Sulawesi, Tomini Bay, Cendrawasih Bay and Arafura Sea. The production of Tuna and skipjack Tuna continues to increase particularly during 2000 to 2015. The increased number of Tuna and skipjack production indicates the high demand of these two commodities. There are various fishing gear to catch Tuna and Skipjack, which can be grouped into 6 types, namely Tuna long line, drift longline other than Tuna long line, set long line, huhate (skipjack pole and line), troll line and other fishing rods (other pole and line)

scholarly journals Komposisi hasil tangkapan jaring insang dasar di perairan Desa Talise Tambun, Kecamatan Likupang Barat (Composition catches of bottom gillnet in Talise Tambun Waters of Likupang Barat District)

2018 ◽  
Vol 3 (1) ◽  
Author(s):  
Fransina Kawarnidi ◽  
Ivor L. Labaro ◽  
Fanny Silloy
Keyword(s):  
Coastal Waters ◽  
Scientific Information ◽  
Mesh Size ◽  
Gill Nets ◽  
Gill Net ◽  
Species Analysis ◽  
The Difference ◽  
Catch Composition ◽  
Descriptive Method ◽  
Better Than

The bottom gill nets are the most common fishing gear in coastal areas, with different mesh sizes.The catch of bottom gill nets is generally dameral fish with different sizes and species. Scientific information about the difference of catch composition in the 3-inch and 4-inch mesh size of bottom gill nets is still poorly available. It is therefore necessary to study a composition of the catch on two bottom gill net mesh sizes of 3 inches and 4 inches, comparing the composition of the quantity and weight of the catch and identify the species of fish caught.  This research was done in coastal waters of Talise Tambun village, Likupang Barat District of Minahasa Utara Regency for two weeks October 2017; following a descriptive method based on case studies. Two unit bottom gill nets were operated seven trips to data colected; and the data were analyzed by composition species analysis and weight composition.The results showed that the composition of the catch quantity of bottom gill net 3-inch 64 fish and 48 species dominated by Rengginan fish 21.88%, while the catching composition of 4-inch mesh size amounted to 91 fishes and 63 species dominated by Swangi as 14.29% .  The weight catch composition of the 3-inch bottom gill net was dominated by sharks of 25.16% with a weight of 33.386 kg, while the 4-inch bottom gill net catch weights were dominated by snapper as 35.71% with a weight of 101,502 kg.The results of the analysis showed that the 3-inch mesh size of bottom gill net catch composition of both the quantity, the species and the catch weight was better than the 4-inch capture composition.Keywords: Bottom gillnet, weight, composition ABSTRAKJaring insang dasar adalah alat tangkap yang banyak ditemukan diwilayah pesisir, dengan ukuran mata jaring yang berbeda-beda.Hasil tangkapan jaring insang dasar umumnya ikan damersal dengan ukuran dan jenis yang berbeda.Informasi Ilmiahtentang perbedaan komposisi hasil tangkapan pada jaring insang dasar mata 3 inci dan 4 inci masih kurang tersedia.Untuk itu perlu suatu penelitian yang bertujuan mengetahui komposisi hasil tangkapan pada dua ukuran mata jaring insang dasar 3 inci dan 4 inci, membandingkan komposisi jumlah dan bobot hasil tangkapan dan mengidentifikasi jenis ikan yang tertangkap.Penelitian ini dilaksanakan di perairanDesa Talise Tambun Kecamatan Likupang Barat Kabupaten Minahasa Utara;  selama 2 minggu, pada bulan Oktober 2017;  dikerjakan dengan mengikuti metode deskriptif yang didasarkan pada studi kasus.Dua unit jaring insang dasar PA Multifilament dengan besar mata masing-masing 3 dan 4 inci dioperasikan selama 7 trip untuk mengumpulkan data; dan data dianalisis dengan analisis komposisi jenis dan komposisi bobot.Hasil penelitian menunjukkan bahwa komposisi jumlah tangkapan  jaring insang dasar mata 3 inci sebanyak  64 ekor dan 48 jenis yang didominasi oleh ikan Rengginan sebesar 21.88%, sedangkan komposisi tangkapan jaring insang dasar 4 inci berjumlah 91 ekor dan 63 jenis yang didominasi oleh  ikan Swangi sebanyak 14.29 %.  Selanjutnya komposisi bobot tangkapan jaring insang dasar mata 3 inci didominasi oleh ikan Hiu sebesar 25.16 % dengan  bobot 33,386 kg, sedangkan komposisi bobot tangkapan jaring insang dasar mata 4 inci didominasi oleh ikan kakap sebanyak 35.71% dengan bobot 101,502 kg. Hasil analisis menunjukkan bahwa komposisi tangkapan jaring insang dasar mata 3 inci baik jumlah, jenis maupun bobot tangkapan lebih baik dibandingkan dengan komposisi tangkapan jaring insang dasar mata 4 inci.Kata-kata Kunci: Jaring insang dasar, bobot, komposisi.

scholarly journals Komposisi hasil tangkapan jaring insang dasar dan cara tertangkapnya ikan di Perairan Malalayang (Composition catches of bottom gillnet and how to catch fish in Malalayang Waters)

2018 ◽  
Vol 3 (2) ◽  
Author(s):  
Maikel F. Pondaag ◽  
Meta S. Sompie ◽  
Johnny Budiman
Keyword(s):  
Mesh Size ◽  
Fishing Ground ◽  
Fish Swimming ◽  
Gill Net ◽  
Size Number ◽  
Study Results ◽  
Catch Composition ◽  
Individual Size ◽  
Descriptive Method

Gill net is a fishing gear set vertically underwater to ambushed off the fish swimming direction. The fish are caught by means of gill trapped or body entangled. One of the gill fishing ground is in Malalayang Dua, Manado. This study was aims to knowing the species composition of bottom gill net with mesh size of 3 inches, 3½ inches, and 4 inches, comparing the catch number and individual size caught in different mesh size, and knowing how they were caught. The study used a descriptive method based on a case study. Results showed that the catches were dominted by parrotfish (Scarus sp.), 26 individuals, followed by surgeonfish (Achanthurus pyroferus), 21 individuals, butterflyfish (Zanclus cornutus), 8 individuals, and other species, less than 5 individuals. The fish caught in the mesh size of 3 inches were 60 individuals, 3½ inches were 29 individuals, 4 inches were 2 individuals. The parrotfish were dominantly caught in the mesh size of 3 inches, 17 individuals, tangs in 3 inches, 13 individuals, and the butterflyfish in 3 inches, 7 individuals. The heaviest fish caught in the mesh size of 3½ inches was 2.74 kg for parrotfish, 1.55 kg for surgeonfish and 5.1 kg for goatfish.Keywords: bottom gill net, catch composition, size, number of catches. AbstrakJaring insang adalah jaring yang dipasang tegak lurus dalam  air untuk menghadang arah renang ikan. Jaring insang dasar merupakan salah satu alat tangkap yang pengoperasiannya digemari oleh nelayan-nelayan yang dilakukan didaerah tertentu (certain area) tangkapan sehingga diharapkan semua ikan ataupun yang berada pada area dapat tertangkap. Salah satu daerah penangkapan ikan dengan jaring insang adalah Malalayang Dua Kota Manado. Penelitian ini bertujuan untuk mengetahui komposisi hasil tangkapan jaring insang dasar yang berukuran mata 3 inci, 3½ inci dan 4 inci, membandingkan komposisi jumlah dan ukuran hasil tangkapan dari ukuran mata jaring yang digunakan, dan mengetahui bagaimana cara tertangkapnya ikan pada berbagai ukuran mata jaring. Jenis ikan kakatua (Scarus sp) mendominasi hasil tangkapan sebanyak 26 ekor, diikuti oleh ikan butana (Achanthurus pyroferus) sebanyak 21 ekor, ikan kupu-kupu (Zanclus cornutus) sebanyak 8 ekor sedangkan jenis lainnya tertangkap kurang dari 5 ekor. Jumlah hasil tangkapan yang diperoleh ukuran mata 3 inci 60 ekor,ukuran mata 3½ inci  yaitu 29 ekor, dan ukuran mata 4 inci hanya  2 ekor. Komposisi jumlah hasil tangkapan ikan Kakatua didominasi oleh mata jaring ukuran 3 inci yaitu 17 ekor, pada ikan Butana didominasi oleh mata jaring 3 inci yaitu 13 ekor, dan untuk ikan kupu-kuu didominasi oleh mata jaring 3 inci dengan jumlah 7 ekor. Bobot ikan kakatua lebih berat pada mata jaring 3½ inci yaitu 2,74 kg, ikan Butana lebih berat pada mata jaring 3½ inci yaitu 1,55 kg, dan ikan Biji nangka pada mata 3½ inci dengan berat 5,1 kg.Kata kunci : jaring insang dasar, komposisi hasil tangkapan, ukuran, hasil tangkapan

scholarly journals Marine protected area and the spatial distribution of the gill net fishery in Copacabana, Rio de Janeiro, RJ, Brazil

2016 ◽  
Vol 76 (1) ◽  
pp. 1-9 ◽  
Author(s):  
R. B. Amorim ◽  
C. Monteiro-Neto
Keyword(s):  
Protected Area ◽  
Rio De Janeiro ◽  
Marine Protected Area ◽  
Local Ecological Knowledge ◽  
Ecological Knowledge ◽  
Target Species ◽  
Fisheries Resources ◽  
Gill Net ◽  
Fishing Gears ◽  
Management Plans

Abstract This study characterizes the gill net fishery at Colônia de Pescadores Z13 (CPZ13), in Copacabana, Rio de Janeiro, and its relationship with the marine protected area ‘Monumento Natural do Arquipélago das Ilhas Cagarras – MoNa Cagarras’, describing the fleet and fishing gears, identifying fishing spots, species and their associations by gillnet type. From June 2012 to May 2013, every Tuesday to Sunday, gill net landings were monitored and fishers interviewed regarding their catch. Small boats (dory whaleboats) are used to set three types of gillnets: “Corvineira” (target species – whitemouth croaker), “linguadeira” (target species – flounders) and “rede-alta” (target species – bluefish). Fifty-nine species within 37 families were captured at 14 fishing spots, showing association with bottom type and distance from shore. The use of fisher’s local ecological knowledge defines gear placement at specific sites targeting fisheries resources. All fishing sites are not within the limits of MoNa Cagarras but would benefit from management plans including an MPA buffering zone.

scholarly journals Construction of Gill Net 2 and 3 Inches in The Village Kampung Nelayan of Regency Tanjung Jabung Barat

2019 ◽  
Vol 10 (1) ◽  
pp. 15-23
Author(s):  
Nelwida Nelwida ◽  
Lisna Lisna ◽  
Ren Fitriadi
Keyword(s):  
Statistical Analysis ◽  
Survey Method ◽  
Fishing Gear ◽  
Environmental Friendliness ◽  
Gill Nets ◽  
A Value ◽  
Gill Net ◽  
Dimension Analysis ◽  
The Village ◽  
Descriptive Statistical Analysis

Gill nets is the most dominant fishing gear used by fishermen in Kampung Nelayan Village. Gill nets 2 and 3 inches are widely used by traditional fishermen and modern fishermen because this tool is very practical to catch fish also friendly to the environment. This study aims to determine the construction and friendliness of fishing gear gill nets 2 and 3 inches which include the length of the net, the width of the net, shortening, buoyancy and sinking power. This research was carried out in the Village of Kampung Nelayan, Tungkal Ilir Subdistrict, Tanjung Jabung Barat District in February 2018. The method used in this research was survey method. The data obtained were analyzed using net dimension analysis and descriptive statistical analysis. Based on the results of research on the construction of 2 and 3 inches gill nets consisting of nylon monofilament made from transparent colors. The knot used by the English knot. Top rope, float, and float buoy made from polyethylene (PE) rope and ballast rope made from polypropylene (PP). The sinker made from tin and gill net 3 inch weight based on bracelet-shaped wire.Net shortening value of 2 inch is 51.75% and has a buoyancy of 3.05 kgf and a sinking power of 9.97 kgf. As well as the value of gill shortening 3 inch 50.62% and the buoyancy generated 6.22 kgf and the sinking power of 365.4 kgf. The value of environmental friendliness of 2 and 3 inch nets has a value of 31.25 and 30.75 and is classified as environmentally friendly fishing gear.

scholarly journals PERIKANAN PELAGIS KECIL DI DAERAH TELUK: STUDI KASUS DI TELUK SAPE NUSA TENGGARA BARAT

2002 ◽  
Vol 4 (1) ◽  
Author(s):  
Suadi Suadi
Keyword(s):  
The State ◽  
Fishing Ground ◽  
Fisheries Resources ◽  
Intensive Exploitation ◽  
Integrated Policy ◽  
Resources Exploitation ◽  
Relationship Of ◽  
The Relationship ◽  
Pelagic Fishery ◽  
Pelagic Fisheries

The aims of this research were to know the state of small pelagic fishery and social economic aspect of resources exploitation. To examine these issues, the research combined survey and descriptive analytic methods. Gordon-Schaefer model was applied to analyze the state of fishery and analytical descriptive to explained the relationship of the phenomena's. Data collection was based on indepth interview and recording of District Fishery Service's. Samll pelagic fisheries that been analyzed were anchovies (Stolephorus sp.), squids (Loligo sp.), and mackerels (Rastrelliger sp.).There are two main problems of fisheries in the area, firstly, the conflict on coastal zone between marine capture fisheries and mariculture. The second one is the intensive exploitation of fisheries resources. Pelagic fisheries at Sape Bay have been exploited above maximum TAC mainly 80% of MSY. MSY of anchovies (Stolephorus sp.) reached 2324,9 ton at number of effort 56534 trip and MEY 2172,3 ton at number of effort 42144 trips. MSY of squids (Loligo sp.) is 455,0 ton at number of effort 12183 trip and MEY 449,0 ton at number of effort 10780 trips equal to Bagan Perahu  trips. The model was not applicable to predict the MSY and MEY of mackerels (Rastrelliger sp.). The continuing increase of effort will depleted the stock and decreased economic rent. In addition, the increasing of competition on fishing ground with pearl culture, have resulted fishermen stress. The integrated policy and management are needed to solve these problems and to avoid social riots. 

scholarly journals AKTIVITAS PENANGKAPAN DAN DISTRIBUSI UDANG GALAH (Macrobrachium rosenbergii) DI DAERAH ALIRAN SUNGAI KAPUAS, KALIMANTAN BARAT

2017 ◽  
Vol 14 (2) ◽  
pp. 181
Author(s):  
Samuel Samuel ◽  
Siti Nurul Aida
Keyword(s):  
Macrobrachium Rosenbergii ◽  
Aquatic Organisms ◽  
Survey Method ◽  
Catch Per Unit Effort ◽  
West Kalimantan ◽  
Gill Net ◽  
Long Line ◽  
Fishing Gears ◽  
Descriptive Method ◽  
Dry And Rainy Seasons

Suatu riset yang bertujuan untuk mendapatkan data dan informasi tentang aktivitas penangkapan dan distribusi udang galah (Macrobrachium rosenbergii) di daerah aliaran Sungai Kapuas, Kalimantan Barat telah dilakukan dari bulan Juni sampai dengan Desember 2005. Riset dilaksanakan dengan metode survei dengan cara mendatangi lokasi-lokasi tempat ada aktivitas penangkapan udang galah (Macrobrachium rosenbergii). Frekuensi survei 2 kali pada musim kemarau dan 2 kali pada musim hujan. Wilayah perairan yang disurvei adalah daerah aliaran Sungai Kapuas dalam Kabupaten Pontianak, Kota Pontianak, Kabupaten Sanggau, dan Kabupaten Sintang. Data dianalisis dengan metode deskriptif dan tabulasi. Dari survei ditemukan 9 jenis alat tangkap yang digunakan nelayan untuk menangkap udang galah (Macrobrachium rosenbergii) yaitu pancing, rawai, bubu, jala, jaring, blad, rompong, stroom, dan pukat rantau. Catch per unit of effort terkecil terjadi pada alat tangkap bubu yaitu 1,39 g per per unit per jam, terbesar adalah jala yaitu 416,67 g per unit jala per jam. Intensitas penangkapan terlihat dominan di perairan bagian hilir mencakup wilayah Kabupaten dan Kota Pontianak. Distribusi ukuran bobot individu udang galah (Macrobrachium rosenbergii) yang banyak tertangkap oleh nelayan (nilai modus) dari 4 kali survei bervariasi antara 17,73 sampai dengan 40,00 g (Kabupaten Pontianak); 19,31 sampai dengan 47,01 g (Kota Pontianak), 17,79 sampai dengan 45, 35 g (Kabupaten Sanggau), dan antara 25,08 sampai dengan 85,52 g (Kabupaten Sintang). Kualitas air pada habitat tempat udang tertangkap di daerah aliaran Sungai Kapuas dalam batas-batas yang layak untuk mendukung kehidupan ikan dan udang. A study aimed to obtain recent data and information about capture activities and distribution of giant freshwater (Macrobrachiumrosenbergii) prawn in Kapuas River,West Kalimantan was conducted from June to December 2005. Survey method was used in each research stations that are Pontianak district, Pontianak City, Sanggau, and Sintang districts. The stations were selected based on fishing activities and habitat condition. Field survey was completed by conducting 4 times surveys including dry and rainy seasons. Data collected were analyzed by using tabulation and descriptive method. The results showed that there were 9 types of fishing gears commonly used to catch giant freshwater (Macrobrachium rosenbergii) prawn. These fishing gears were : hook and line, long line, pot traps, cast net, gill net, barrier traps, surrounding net, electrical fishing, and surrounding net. Catch per unit effort of the cast net was the highest (416,67 gr per unit per hour, whereas, pot trap was the lowest (1,39 g per unit per hour). Water quality in each stations indicated suitable for aquatic organisms. The capture intensity showed that in downstream(Pontianak District and Pontianak City) was more dominant than in upstream (Sanggau and Sintang Districts). Distribution of weight based on modus indicated variation in each stations, which are 17.73 to 40.00 g (Pontianak District), 19.31 to 47.01 g (Pontianak District), 17.79 to 45.35 g (Sanggau District),and 25.08 to 85.52 g (Sintang District).

Pemetaan Derah Penangkapan Rajungan Dengan Jaring Insang Dasar (Bottom Gill Net) di Perairan Kronjo, Kabupaten Tangerang

2019 ◽  
Vol 5 (1) ◽  
pp. 50-58
Author(s):  
Samsu Nur Pratomo ◽  
Hendrawan Syafrie
Keyword(s):  
Fishing Ground ◽  
Portunus Pelagicus ◽  
Gill Net

Salah satu potensi perikanan laut tersebut adalah rajungan (Portunus pelagicus). Jaring insang dasar merupakan salah satu alat tangkap yang digunakan nelayan dalam mengakap rajungan di Kronjo. Alat tangkap jaring insang dasar menghasilkan hasil tangkapan utama (HTU) dan hasil tangkapan sampingan (HTS). Hasil tangkapan utama merupakan hasil tangkapan yang menjadi target utama nelayan. Penentuan fishing ground dapat dipetakan dengan menggunakan data operasi penangkapan. Informasi mengenai jumlah hasil tangkapan ikan dalam suatu wilayah sangat diperlukan sebagai acuan untuk mengetahui daerah penangkapan potensial. Pemetaan dan identifikasi daerah penangkapan menggunakan tiga indikator, yaitu lokasi operasi penangkapan, hasil tangkapan dan kondisi lingkungan, seperti kedalaman dan substrat perairan. Analisis komposisi hasil tangkapan dilakukan secara deskriptif-tabulatif. Metode analisis deskriptif adalah statistik yang digunakan untuk menganalisis data dengan cara mendeskripsikan atau menggambarkan data yang telah terkumpul sebagaimana adanya tanpa bermaksud membuat kesimpulan yang berlaku untuk umum atau generalisasi. Berdasarkan hasil penelitian daerah penangkapan rajungan secara umum di Perairan Kronjo terletak disekitar Pulau Cangkir. Daerah penangkapan rajungan di sekitar Pulau Cangkir memiliki substrat lumur berpasir sebagai habitatnya. Komposisi hasil tangkapan nelayan dari hasil tangkapan sampingan (HTS) didapatkan seberat 224 kg dengan persentase sebesar 27,55%. Komposisi hasil tangkapan nelayan dari hasil tangkapan tidak dimanfaatkan (Discard) didapatkan seberat 106 kg dengan persentase sebesar 13,04 %

Status of fish biodiversity and fishing on Hau River, Mekong Delta, Vietnam

2020 ◽  
Vol 56 ◽  
pp. 14
Author(s):  
Vu Ngoc Ut ◽  
Au Van Hoa ◽  
Huynh Phuoc Vinh
Keyword(s):  
Species Composition ◽  
Fish Species ◽  
Mekong Delta ◽  
Middle Part ◽  
Fishing Ground ◽  
Sampling Gear ◽  
Fish Biodiversity ◽  
Gill Net ◽  
Fishing Gears ◽  
The Status

Fish biodiversity on Hau (Bassac) river was investigated to assess the status of species composition and fishing by fishing gears during a year. Sampling was implemented monthly at the upper part (An Giang province), middle part (Can Tho City) and lower part (Soc Trang province) of Hau River using trawl net as main sampling gear. Additionally, fish composition was also recorded from four other most popular fishing gears including cast net, gill net, fixed net and hook operated in the study sites. Fish species composition was determined by fishing gears and their abundance (CPUE) was calculated only from the main sampling gear (trawl net). The results showed that a total of 176 fish species belonging to 16 orders and 49 families was recorded. Perciformes was the most abundant group with 51 species followed by Cypriniformes with 46 species. The number of fish species was decreasing from upper part to lower part. Trawl net was considered the most destructive gear as up to 145 fish species caught by this device, followed by gill net with 98 species, fixed net 75, cast net 57, and hooks 16 species. CPUE was very low ranging from  0.53 kg.ha−1 h−1 to 26.30 kg.ha−1 h−1. Higher CPUE was recorded at lower part in compared to upper part and middle part, and at dry season in compared to rainy season. Regulation on fishing gears, fishing ground and season should be taken into consideration to protect and conserve the resources.

Shark fisheries in Argentina

1998 ◽  
Vol 49 (7) ◽  
pp. 601 ◽  
Author(s):  
Gustavo E. Chiaramonte
Keyword(s):  
Fishing Effort ◽  
Population Trends ◽  
The South ◽  
Gill Nets ◽  
Argentine Sea ◽  
Commercial Importance ◽  
South West ◽  
Gill Net ◽  
Galeorhinus Galeus ◽  
Mustelus Schmitti

In the Argentine Sea there are about 35 species of sharks. Three species are subjected to directed fishing: the smoothhound Mustelus schmitti, the school shark Galeorhinus galeus and the copper shark Carcharhinus brachyurus. Other species of elasmobranchs with commercial importance are the angel shark Squatina spp. and several species of skates and rays. The rise in chondrichthyan declared landings registered from 1988 to 1996 is due to the increase in landings of smoothhound and rays. The most important directed shark fishery in the South-West Atlantic is the Necochea gill-net fishery for school shark, which is carried out by the coastal fleet; details are given of the ships and the gill-nets used in this area. The length frequencies of the catches by gill-nets are presented for the school shark; fishing effort (length (km) of net in the water per ship per day) and CPUE (number of sharks per fishing effort) were found not to be good indicators of population trends in the school shark fishery. Resumen. En el Mar Argentino se han registrado 35 especies de tiburones. Tres de estas especies están sometidas a una pesca dirigida; el gatuzo, Mustelus schmitti, el cazón, tiburón vitamínico o trompa de cristal, Galeorhinus galeus y la bacota, Carcharhinus brachyurus. Otras especies de elasmobranquios de importancia comercial son el pez ángel Squatina spp. y algunas especies de rayas. El incremento en los desembarcos de condríctios declarados a las autoridades pesqueras entre 1988 y 1996 es debido principalmente al incremento del desembarco de gatuzo y rayas. La pesquería dirigida a tiburón más importante en el Atlántico Sudoccidental es la pesquería costera de enmalle de Necochea para el cazón. Se describen el largo de las embarcaciones y las redes utilizadas en el área (la medida de malla, el calado y la operación del arte de pesca). Se presenta la frecuencia del largo total de las capturas de cazón en redes de enmalle. Se halló para la pesquería del cazón que el esfuerzo pesquero (estimado como km de red en el agua por embarcación por día) y la CPUE (estimada como tiburones/esfuerzo de pesca) no son buenos indicadores de la tendencia en la abundancia poblacional.

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