Seasonal variation in CPUE of fish collected by gill net, trap net, and long line in the coastal area of Go-heung, Korea

2017 ◽  
Vol 10 (1) ◽  
pp. 63-72
Author(s):  
Eunbi MIN ◽  
Juwon YUN ◽  
Eun-a YOON ◽  
Doojin HWANG
Keyword(s):  
Seasonal Variation ◽  
Coastal Area ◽  
Gill Net ◽  
Long Line

Species composition and abundance of resources collcted by gill net, trap net, and long line in the coastal area of Oenarodo Go-heung, Korea

2019 ◽  
Vol 12 (1) ◽  
pp. 76-83
Author(s):  
Chae-Lin KIM ◽  
Jeong-A AN ◽  
Eun-Bi MIN ◽  
Eun-A YOON ◽  
Doo-Jin HWANG
Keyword(s):  
Species Composition ◽  
Coastal Area ◽  
Gill Net ◽  
Long Line

scholarly journals ANALISIS PENDAPATAN USAHA TANGKAP NELAYAN DAN FAKTOR-FAKTOR YANG MEMPENGARUHINYA DI WILAYAH PESISIR PANTAI SULAWESI SELATAN

2017 ◽  
Vol 6 (2) ◽  
pp. 235 ◽  
Author(s):  
Abdul Rahim
Keyword(s):  
Cross Section ◽  
Coastal Area ◽  
Primary Data ◽  
Gasoline Price ◽  
Section Data ◽  
South Sulawesi ◽  
Gill Net ◽  
Long Line ◽  
Fishing Area ◽  
Area Difference

Penelitian yang dilakukan di wilayah pesisir pantai Sulawesi Selatan bertujuan untuk menghitung besarnya perbedaan pendapatan usaha tangkap nelayan dan menganalisis faktor-faktor yang mempengaruhinya. Metode yang digunakan adalah deskriptif dan eksplanatori. Berdasarkan dimensi waktu digunakan data cross-section yang bersumber pada data primer. Responden nelayan diambil secara stratified sampling sedangkan kabupaten secara purposive sampling. Hasil penelitian menemukan bahwa pendapatan usaha tangkap nelayan perahu motor dan perahu tanpa motor di Kabupaten Jeneponto lebih besar dari nelayan Kabupaten Barru dan Sinjai. Besar-kecilnya pendapatan usaha tangkap nelayan perahu motor per trip di wilayah pesisir pantai Sulawesi Selatan dipengaruhi secara positif oleh harga minyak tanah, produktivitas, umur, dan alat tangkap rawai tetap, sedangkan secara negatif dipengaruhi oleh harga bensin, lama melaut, dan perbedaan wilayah penangkapan. Pendapatan nelayan perahu tanpa motor per trip di Sulawesi Selatan dipengaruhi secara positif oleh produktivitas jaring insang tetap dan perbedaan wilayah. Selama setahun, pendapatan nelayan perahu motor dipengaruhi secara positif oleh harga minyak tanah, dan produktivitas secara nyata positif; sedangkan secara negatif dipengaruhi oleh harga bensin, lama melaut, trip, dan perbedaan wilayah. Pendapatan nelayan perahu tanpa motor secara positif dipengaruhi oleh produktivitas, tanggungan keluarga, jaring insang tetap, dan perbedaan wilayah. Tittle: Analysis of Fisher’s Fishing Income and its Various Factors Influence in Coastal Area of South Sulawesi.Research was conducted in coastal area region of South Sulawesi which aimed to calculate the level of difference fisher’s fishing income from each region of coastal area and analysis the various factors influencing it. Research method was used descriptive and explanatory. cross-section data of the primary data. Fisher’s responder were sampled stratifiecally indicate that is fishing income of motorized boat were used and non-motorized boat in regency Jeneponto bigger than is Barru and Sinjai. Then its motorized boat fisher’s fishing income per trip in coastal area of South Sulawesi influenced positively by kerosene price, productivity, age, and set long line, while negatively influenced by gasoline price,fishing day per trip, and difference of fishing areas. Then fishing income non-motorized boat fisher’s per trip in South Sulawesi influenced positively by productivity, set gill net remain to and regional difference. Other only a annual fishing income motorized boat fisher’s influenced positively by kerosene price, and productivity positive manifestly, while negatively influenced by gasoline price, fishing day per trip, number of trip, and fishing area difference. Then fishing income non-motorized boat fisher’s  influenced positively by productivity, family responsibility, set gill net, and fishing area difference.

Seasonal variation of cloud-to-ground lightning flash characteristics in the coastal area of the Sea of Japan

1989 ◽  
Vol 94 (D11) ◽  
pp. 13207 ◽  
Author(s):  
J. Hojo ◽  
M. Ishii ◽  
T. Kawamura ◽  
F. Suzuki ◽  
H. Komuro ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Sea Of Japan ◽  
Coastal Area ◽  
The Sea Of Japan ◽  
Lightning Flash ◽  
Cloud To Ground Lightning

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).

scholarly journals Untangling the Indonesian tangle net fishery: describing a data-poor fishery targeting large threatened rays (Order Batoidea)

2019 ◽  
Author(s):  
Brooke M. D’Alberto ◽  
William T. White ◽  
Andrew Chin ◽  
Dharmadi ◽  
Colin A. Simpfendorfer
Keyword(s):  
Seasonal Variation ◽  
Target Species ◽  
Size Classes ◽  
Catch Data ◽  
Long Line ◽  
Main Target ◽  
The Status ◽  
Incidental Catch ◽  
Catch Composition ◽  
Over Time

AbstractShark-like batoids (Order Rhinopristiformes) are normally taken as incidental catch in fisheries targeting other species, one exception is a poorly understood Indonesian tangle net fishery. Market surveys of Muara Angke landing port recorded landed catch for this fishery. Recent catch data from Indonesian Capture Fisheries (2017 – 2018) were also examined to provide contemporary information. During the market surveys, 1,559 elasmobranchs were recorded, comprised of 24 species of batoids and nine species of sharks. The most abundant were pink whiprayPateobatis faiand bottlenose wedgefishRhynchobatus australiae, the latter being the main target species. Catch composition differed between individual tangle net boat landings, likely reflecting different fishing grounds, seasonal variation and potential localised declines in species over time. The fishery is highly selective for larger size classes, but smaller size classes of target species are also caught in high numbers in other Indonesian fisheries such as trawl, small mesh gillnet, and hand- and long-line fisheries. As of July 2018, the tangle net fishery was still operating, but few wedgefish were caught and the main landed catch was stingrays. Evidence of substantial and rapid declines in landings of wedgefish species, raises concerns about the status of shark-like batoids and stingrays in Indonesia.

Bacterial Loads in Moroccan Mussels from Harvest to Sale

1995 ◽  
Vol 58 (5) ◽  
pp. 509-512 ◽  
Author(s):  
NOURREDINE BOUCHRITI ◽  
ABDELHAK EL MARRAKCHI ◽  
SAGAR M. GOYAL ◽  
RACHID BOUTAIB
Keyword(s):  
Seasonal Variation ◽  
Coastal Area ◽  
Human Pathogens ◽  
Bacterial Counts ◽  
Ambient Temperatures ◽  
Marine Vibrios ◽  
Number Of Bacteria

This study concerns the seasonal variation of bacteria in seawater and mussels harvested from a Moroccan coastal area subject to clandestine shellfishing. The changes in the level of bacterial counts of mussels from harvest to sale are also presented. Both seawater and mussels showed regular increases in bacterial loads from fall to summer. Freshly harvested mussels and market mussels were the most contaminated, while freshly shucked mussels, obtained by removing shells after heating shellstock, were the least contaminated. Heating, traditionally used to remove shells, was found to reduce the initial bacterial loads by 72%. However, the storage of shucked mussels for 6 to 8 h at ambient temperatures prior to marketing resulted in an increase in the number of bacteria either due to recontamination or by growth of survivors. Thus, market mussels were 20 to 86 times more contaminated than shellstock and shucked mussels, respectively. No human pathogens were found, but several species of marine vibrios were identified.

Impact of fishing activities on the fisheries resources and Manado Bay Aquatic environment

2014 ◽  
pp. 53
Author(s):  
Trine Sumampouw ◽  
Emil Reppie ◽  
Markus T Lasut
Keyword(s):  
Negative Impact ◽  
Survey Methods ◽  
Continuous Increase ◽  
Fish Resources ◽  
Fisheries Resources ◽  
Gill Net ◽  
Long Line ◽  
Fishing Gears ◽  
Fisheries Sustainability ◽  
Catch Composition

Manado Bay waters have long been known as a center of artisanal fisheries activities because of the availability of abundant fisheries resources. However,  continuous increase in technoligcal  development and fish resources demand make natural resources exploitation tend to destruct the  aquatic habitat and fish resources itself. Therefore, this study was aimed to inventory the types of fishing gears operated in Manado Bay; evaluate the possible impact on fish resources and environment; and analyze the status of fishing fisheries sustainability. This study was based on survey methods, through direct observation of fishing process and observations on the catch composition. Fisheries sustainability status was analyzed using Rapfish program. Common fishing gears used by fishermen in Manado Bay were multi hooks vertical hand line (noru), bottom hand line, trolling line, bottom long line, surface gill net, bottom gill net and traps. Fishing gears that do not have an impact on fish resources and environment is noru fishing, trolling and surface gill net, while bottom long line, bottom gill net and trap could potentially have negative impact on fish resources and physical seabed habitat. ordination sustainability status analysis of fishing fisheries in Manado Bay for each dimension is still considered as sustainable enough. Perairan Teluk Manado telah lama dikenal sebagai pusat aktivitas perikanan rakyat karena ketersediaan sumber daya ikan masih melimpah. Tetapi perkembangan teknologi dan permintaan sumber daya ikan yang terus meningkat menyebabkan pengeksploitasian sumber daya alam cenderung merusak habitat perairan dan sumber daya ikan itu sendiri. Oleh karena itu penelitian ini bertujuan untuk menginventarisir jenis-jenis alat tangkap yang dioperasikan di perairan Teluk Manado, mengevaluasi kemungkinan dampak alat tangkap terhadap sumber daya ikan dan lingkungan, dan menganalisis status keberlanjutan perikanan tangkap. Penelitian ini didasarkan pada metode survei, melalui pengamatan langsung terhadap proses penangkapan ikan dan mengamati keragaman komposisi hasil tangkapan. Status keberlanjutan perikanan dianalisis dengan program Rapfish. Alat tangkap yang umum digunakan oleh nelayan di perairan Teluk Manado terdiri dari yaitu pancing noru, pancing dasar, pancing tonda,  rawai dasar,  soma landra pajeko, soma landra rakit,  jaring insang dasar dan bubu. Alat tangkap yang tidak memberikan dampak terhadap sumber daya ikan dan lingkungan adalah pancing noru, pancing tonda, soma landra pajeko dan soma landra rakit. Sedangkan alat tangkap yang berpotensi memberikan dampak pada sumber daya ikan dan kerusakan fisik habitat dasar perairan adalah pancing dasar, rawai dasar, jaring insang dasar dan bubu. Hasil ordinasi status keberlanjutan perikanan tangkap di Teluk Manado yang dianalisis pada masing-masing dimensi masih tergolong cukup berkelanjutan.

Seasonal variation of dominant free-floating and attached Ulva species in Rudong coastal area, China

Harmful Algae ◽  
2013 ◽  
Vol 28 ◽  
pp. 46-54 ◽  
Author(s):  
Wei Han ◽  
Li-Ping Chen ◽  
Jian-Heng Zhang ◽  
Xiao-Ling Tian ◽  
Liang Hua ◽  
...  
Keyword(s):  
Seasonal Variation ◽  
Coastal Area
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