scholarly journals ANALISIS PENANGKAPAN IKAN KAKAP MERAH (Lutjanus spp.) DAN KERAPU (Epinephelus sp.) DI PERAIRAN BARRU, SULAWESI SELATAN

2017 ◽  
Vol 2 (2) ◽  
pp. 101
Author(s):  
Bambang Sumiono ◽  
Tri Ernawati ◽  
Wedjatmiko Wedjatmiko
Keyword(s):  
Growth Characteristic ◽  
Mesh Size ◽  
Catch Rate ◽  
Survey Period ◽  
Gill Nets ◽  
South Sulawesi ◽  
Gill Net ◽  
Long Line ◽  
Catch Composition ◽  
Epinephelus Malabaricus

Perairan di sekitar Barru Sulawesi Selatan merupakan salah satu kawasan terumbu karang yang penting di Selat Makassar. Sebagian besar dari nelayannya melakukan penangkapan ikan dengan menggunakan rawai dasar dan jaring insang dasar. Analisis perikanan ikan kakap merah (Lutjanus spp.) dan kerapu (Epinephelus sp.) dilakukan pada bulan Agustus dan Oktober 2006 dengan penekanan pada deskripsi alat tangkap dan teknik penangkapannya, komposisi hasil tangkapan, dan beberapa aspek biologi ikan kakap merah dan kerapu. Penelitian ini dilakukan dengan cara mengikuti kegiatan nelayan yang menggunakan rawai dasar dan jaring insang dasar di sekitar terumbu karang dan pencatatan data dari pendaratan ikan utama. Untuk kelengkapan data dilakukan wawancara dengan nelayan dan pedagang pengumpul setempat. Hasil penelitian ini menunjukan daerah penyebaran ikan kakap merah dan kerapu terdapat di perairan Barru dan Pangkajene Kepulauan. Pada perairan yang relatif dangkal (<50 m) digunakan pancing ulur dengan satu atau dua mata pancing (nomor 6 atau 7). Jaring insang dasar digunakan di luar daerah karang, satu pis (tinting) mempunyai panjang 40 m dan dalam 5 m dengan ukuran mata jaring 4 inci. Satu unit jaring terdiri atas 60 pis. Di perairan yang lebih dalam (lebih dari 50) digunakan rawai dasar yang terdiri atas 600 mata pancing (nomor 7 atau 8). Lama trip penangkapan tiga hari. Diperoleh laju pancing pada rawai dasar berkisar 6-8% dan laju tangkap jaring insang dasar berkisar antara 40-60 kg/kapal/tiga hari. Komposisi hasil tangkapan didominansi (47,2%) oleh ikan kakap merah (famili Lutjanidae) yang terdiri atas jenis Lutjanus malabaricus, Lutjanus hyselopterus, Lutjanus sebae, Lutjanus vittus, dan Pinjalo pinjalo. Ikan kerapu (famili Serranidae) terdiri atas jenis Epinephelus areolatus, Epinephelus malabaricus, Epinephelus microdon, dan Plectropomus maculatus. Kecuali itu tertangkap juga ikan lencam (famili Lethrinidae). Pengamatan biologi jenis ikan Lutjanus malabaricus dan Epinephelus malabaricus yang merupakan hasil tangkapan dominan masing-masing diperoleh nilai modus panjang cagak 48 dan 56 cm dengan modus bobot masing-masing 1,8 dan 2,15 kg. Karakteristik pertumbuhan kedua jenis tersebut adalah allometrik positif.The sea waters around Barru, South Sulawesi is one of the coral reef parts in Makassar Strait. Most of the fishermen use fishing lines, bottom long lines, and bottom gill nets in their fishing activities. Analysis of red snappers (Lutjanus spp.) and groupers (Epinephelus sp.) fisheries in this area were carried out in August and October, 2006. The emphasis is focused on the discription of fishing gear and fishing technique, catch composition, and some of biological aspect of red snappers and groupers. The research was done by following the fishing operations of bottom long line and bottom gill net conducted by fishers in the waters around coral reefs. Data were recorded in some importantant landing place at Barru, and interview of some fishermen to complete data and information needed. The result showed that the distribution of red snapper and groupers occured in the waters around Barru and Pangkajene Islands. In the shallow waters (<50 m) the fishermen use a lightly weighted hand line, with one or two relativelly small hooks (nomor 6 or 7). Bottom gill nets are frequently used in shallow back reef areas with one piece of 40 m in length, and 5 m in depth, with mesh size of 4 inches. One unit of the gear consisted of 60 piece of the nets. Meanwhile, in deeper waters (50-150 m), the number of hooks (nomor 7 or 8) in bottom long line operated 600 hooks for each unit. All fishing gears usually have three days at sea for a fishing trip. The average of catch rate (hook rate) for a trip of bottom long line was 6-8% (6 or 8 individual fish for 100 hooks). Meanwhile, the catch rate of bottom jaring insang was about 40-60 kgs/boat/3 days trip. The catches were dominated by the family Lutjanidae in which the red snappers species (reached to 47.2% at this survey period) including Lutjanus malabaricus, Lutjanus hyselopterus, Lutjanus sebae, Lutjanus vittus, and Pinjalo pinjalo. Meanwhile the groupers (family Serranidae) were dominated by species of Epinephelus areolatus, Epinephelus malabaricus, Epinephelus microdon, and Plectropomus maculatus. Other groups were emperors (Lethrinidae) and Gymnocranius. The biological measured for Lutjanus malabaricus and Epinephelus malabaricus as a dominant landed showed the modus of length were 48 and 58 cmFL, respectivelly. Meanwhile the modus of weight were 1.8 and 2.35 kg. The growth characteristic of both species were positive allometric. It means that increasing the weight was faster than their length.

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 Catching Technology of Fish Maw Snapper’s: Case Study of the KMN Nur Aqila07 Fishing Boat in Kumbe Village, Malind District, Merauke Regency, Papua

2021 ◽  
Vol 328 ◽  
pp. 08011
Author(s):  
Sajriawati Sajriawati
Keyword(s):  
Data Collection ◽  
Mesh Size ◽  
Fishing Gear ◽  
The Sun ◽  
Running Water ◽  
Gill Nets ◽  
Weight Range ◽  
Fishing Boat ◽  
Gill Net

The purpose of this study was to determine the fishing technology used by fishermen in Merauke to catch snapper and post-harvest handling of fish maw snapper. This research was conducted in January 2021 in Kumbe Village, Malind District. Data collection was carried out by interviewing fishermen on the fishing boat KMN Nur Aqila07. The results showed that the fishing boat KMN Nur Aqila07 has a weight specification of 30 GT. The main fishing gear is a drift gill net with a length of 50 meters with a width of 2 meters with a mesh size of 7.5 inches. The pulley machine is used to help pull the gill nets when they want to pull fishing gear (hauling). Fish maw of snapper is removed manually using a knife, then cleaned with running water and then dried in the sun to dry. Fish maw is sold dry. The highest price for fish maw is in the weight range of 150 grams which can reach Rp. 22,500,000 per kg, while the lowest price is in the weight range of less than 50 grams, which is Rp. 4,500,000 per kg.

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.

Assessment of fishing gear and catch rate in Oguta Lake, south Eastern Nigeria

2018 ◽  
Vol 26 (1) ◽  
pp. 1-9
Author(s):  
G. Adaka ◽  
C. Ogueri ◽  
D. Nwaka ◽  
D. Njoku ◽  
A. Nlewadim
Keyword(s):  
Mesh Size ◽  
Catch Rate ◽  
Average Weight ◽  
Fishing Gear ◽  
Gill Nets ◽  
Accurate Picture ◽  
Daily Record ◽  
Over Exploitation ◽  
The Cost ◽  
Percentage Abundance

This study was carried out in Oguta Lake, Imo State, Nigeria, from January, 2012 to December, 2013 at five stations (Onu Utu, Okposha, Ogbe Hausa, Osemotor and Ede Ngwugwu) to ascertain the percentage abundance and catch rate of gear and craft. The average weight of fish caught per canoe per day ranged between 3.2 kg for Basket and Drum traps to 47.1 kg for boat seine net. The gill nets ranged between 6.0 to 13.0kg per canoe per day with mean weight of 8.60±2.91kg, the cast net had values ranging from 1.0 to 7.0 kg with a mean weight of 4.3±2.49 kg. Lift net yielded an average of 3.4 kg per canoe per day. Gill nets were the main gear used by fishers, followed by long lines and cast nets at the lake. It is important to locate all the fishers operating in the lake and daily record of catches be collected for a more accurate picture of the total catch and fish species. Mesh size regulation prevent over exploitation of young fish, before they attain sexual maturity. It is recommended that the cost of procuring fishing inputs such as fishing gear and crafts and safety kits should be monitored by government and be subsidized for the fishers.Key words: drum trap, crafts, catch, exploitation, Oguta, mesh size, trap

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.

scholarly journals Fish catch composition of selected small scale fishing gears used in the Bonny River, Rivers State, Nigeria

2017 ◽  
Vol 5 (1) ◽  
Author(s):  
Olaniyi Alaba Olopade ◽  
Nkuene Gbenekanu Sinclair ◽  
Henry Dienye
Keyword(s):  
Fish Species ◽  
Small Scale ◽  
Wet Season ◽  
Gill Net ◽  
Long Line ◽  
Significant Difference ◽  
Fishing Gears ◽  
Fish Catch ◽  
Catch Composition ◽  
Rivers State

Fish catch composition of some selected small scale fishing gears (gill net, cast net, beach seine and long line) were investigated in Bonny River, Rivers State, Nigeria from August 2014 to January 2015. A total number of 25 fish species from 18 families were recorded during the study. The Mugilidae with only one species constituted the dominant family while Cichlidae, Lutjanidae, Clupeidae, had three species and Scianidae had two species of fish caught and the remaining families had one species each. Mugil cephalus constituted 28.48% of the total catches followed by C. nigrodigitatus (22.48%). In the dry season M. cephalus forms the major component landings (32.65%), followed by C. nigrodigitatus (26.53%) and S. galilaeus (12.24%) while in the wet season M. cephalus (31.06%), C. nigrodigitatus (18.63%) and T. zillii (11.80%) were the dominant fish species. Cast net was the most efficient fishing gear while gill net was the least efficient. The comparison analysis between the wet and dry seasons using t-test showed no significant difference between dry and wet seasons (t = 0.092, P > 0.05).

scholarly journals Fish species composition and size structure exploited by gill net fishery in The New Calabar River, Nigeria

2019 ◽  
Vol 6 (1) ◽  
pp. 1
Author(s):  
Olaniyi Alaba Olopade ◽  
Henry Eyina Dienye ◽  
Ogheneforon Oderhohwo
Keyword(s):  
Species Composition ◽  
Fish Species ◽  
Size Structure ◽  
Mesh Size ◽  
Maximum Size ◽  
Abundant Species ◽  
Fish Stock ◽  
Size Selectivity ◽  
Gill Nets ◽  
Gill Net

The purpose of this study was to investigate the species composition and size selectivity of gillnets commonly used by the artisanal fishers in the New Calabar River, Rivers State, Nigeria. The data was collected during February-July 2018 from 3 sampling stations: SI Choba, S2 Ogbogoro, and S3 Iwofe all along the stretch of the river. Twenty-eight fish species were found belonging to 15 families. The prevalent families were Cichlidae, Mugilidae and Clupeidae representing 32.22%, 30.36% and 10.23% of the total catch, respectively. The most dominant species in terms of number were Liza falcipinnis (12.58%) and Mugil cephalous (12.26%) while in terms of biomass, the most abundance species were Xenomystus nigri (24.12%) and Lutjanus agennes (12.50 %). The girth and total lengths of the fishes ranged from 5.20±0.20 to 21.00±0.00 cm and 8.85±0.15 to 28.19±1.13 cm respectively. The length at first capture (L50%) for the most abundant species (Liza falcipinnis) was calculated to be 14.13 cm while that of L25% and L75% were 12.70cm and 15.25cm respectively. It was concluded that the gill nets used in the New Calabar River exploit fish species of small sizes and few medium sized specimens relative to species potential maximum size. It is therefore recommended that for an improved and sustainable exploitation fish stock of the New Calabar River, the use of gillnets of less than 25 mm-mesh sizes and “other gears” should be prohibited.Keywords: gill nets; species composition; mesh size; selectivity; New Calabar River

scholarly journals PENERAPAN PERUBAHAN UKURAN MATA JARING DALAM PENANGKAPAN IKAN TERBANG SECARA BERKELANJUTAN DI KECAMATAN SENDANA KABUPATEN MAJENE

2018 ◽  
Vol 1 (1) ◽  
pp. 17-27
Author(s):  
Najamuddin Najamuddin ◽  
Andi Assir ◽  
Mahfud Palo ◽  
Andi Asni Najamuddin
Keyword(s):  
Mesh Size ◽  
Community Empowerment ◽  
Fishing Gear ◽  
Young Fish ◽  
Gill Nets ◽  
Group Management ◽  
Gill Net ◽  
Large Numbers ◽  
Flying Fish ◽  
The Government

Catching flying fish in Sendana Majene Subdistrict is carried out continuously with gill nets 1-1.5 inches. The catch of flying fish is mostly still young fish (not yet worth catching). The demand for flying fish is quite high due to the existence of special stalls of smoke fly fish around fishing settlements. Apart from smoke flying fish, dried flying fish are also sold as souvenirs. Therefore, fishermen will continue to increase production. Various results of research and field observations show that gill net is able to catch flying fish well but the size of fish caught is dominated by young fish. The effort to increase the net mesh size to 1.5 inches resulted in the diminishing number of young flying fish. Catching flying fish in Majene waters is generally carried out with drifting gill nets with mesh sizes of 1 and 1.25 inches which are very intensive every fishing season while L50 (11.92 cm) and Lm (13.59 cm) for 1 inch more net mesh size were smaller compared to the length of the first gonad maturity, in this case most of the catch is still classified as young fish (Palo, 2009). Partners are a group of flying fish fishermen. Partner problems, flying fish production is getting smaller, group capacity is not strong and group management is still weak. Partners have not been able to obtain assistance facilities from various community empowerment programs carried out by the government. The approach to be used in this service includes: identification, observation, counseling, demonstration, construction, application, assistance, field observation and evaluation monitoring. Indicators of the success of activities are measured based on the results of the application of technology compared to the results of fishing gear commonly used by fishermen. Implementation of service includes counseling, construction of fishing gear, fishing operations and assistance has been going well. The size of 1.5-inch mesh is only able to catch flying fish in a limited amount, while the size of the 1.25-inch mesh can catch flying fish in relatively large numbers. Flying fish caught with 1.25-inch mesh size has passed the size of the first gonad mature so that it supports sustainable fisheries.

scholarly journals (Study on Stomach Contents of Opudi Fish (Telmatherina celebensis) in Towuti Lake, South Sulawesi)

2007 ◽  
Vol 5 (2) ◽  
pp. 149
Author(s):  
. Sulistiono ◽  
A. Furkon ◽  
R. Affandi
Keyword(s):  
Food Habits ◽  
Stomach Contents ◽  
Mesh Size ◽  
Total Body Length ◽  
Female Fish ◽  
Additional Food ◽  
South Sulawesi ◽  
Gill Net ◽  
Fish Samples ◽  
Total Body

<p>Study on food habits of opudi fish (<em>T. celebensis</em>) was conducted in Towuti Lake, South Sulawesi, from October 2002 to April 2003.  The objective of this study was to investigate food habits of the fish.  Samples were collected by using experimental gill net, mesh size  0,75; 1; 1,25 and 1,5 inches. The fish (N=273) was consisted of 141 males and 132 females, varied in total body length (55.8-94.7 mm).  Stomach content was analyzed using Index of preponderance.  Stomach contents of the fish was consisted of 4 kinds of foods such as insect, part of organism,  debris and  zooplankton.  Main food of the fish was insect (IP 51.22% for male, 43.26% for female,  suplement food was part of insect (IP 26.99% for male, 30.27% for female) and debris (IP 14.06% for male, 15.83% for female), while additional food was zooplankton consisted of <em>Closterium</em> (IP 2.93% for male, 4.62% for female), <em>Pinnularia</em> (IP1.79% for male, IP 1.39% for female), <em>Navicula</em> (IP 1.19%, for male, 1.41% for female) and <em>Nitzschia</em> (IP 0.74% for male,  1.08% for female).  Food kind between male and female fish was similar.</p> <p>Keywords : Stomach contents, opudi fish (<em>T.celebensis</em>), Towuti Lake.</p> <p> </p> <p>ABSTRAK</p> <p>Penelitian makanan ikan opudi (<em>T.celebensis</em>) dilakukan di Danau Towuti, Sulawesi Selatan pada bulan Oktober 2002-April 2003. Tujuan dari penelitian ini adalah untuk mengetahui isi lambung ikan opudi. Ikan contoh diambil dengan <em>experimental gill</em> net dengan ukuran mata jaring 0,75; 1; 1,25 dan 1,5 inchi.  Ikan yang tertangkap (N=273) terdiri atas Jantan (141) dan betina (132), yang memiliki variasi ukuran panjang tubuh (55,8-94,7 mm). Isi lambung dianalisis dengan menggunakan <em>Index of preponderance </em>(IP).  Isi lambung terdiri dari 4 jenis makanan yaitu insekta, potongan tubuh insekta, serasah dan zooplankton. Makanan utama ikan opudi adalah insekta (IP 51,22% untuk jantan,  43,26% untuk betina), makanan pelengkap adalah potongan insekta (IP 26,99% untuk jantan, 30,27% untuk betina) dan serasah (IP 14,06% untuk jantan, 15,83% untuk betina), sedangkan makanan tambahan berupa zooplankton yang terdiri atas<em> Closterium</em> (2,93% untuk jantan, 4,62% untuk betina), <em>Pinnularia</em> (1,79% untuk jantan, 1,39% untuk betina), <em>Navicula</em> (1,19% untuk jantan, 1,41% untuk betina) and <em>Nitzschia</em> (0,74% untuk jantan, 1,08% untuk betina). Berdasarkan indeks similaritas, jenis makanan untuk ikan jantan dan ikan betina adalah mirip.</p> <p>Kata kunci : Isi lambung, ikan opudi (<em>T.celebensis</em>), Danau Towuti.</p>

scholarly journals Catch and size selectivity of small-scale fishing gear for the smooth-hound shark Mustelus mustelus (Linnaeus, 1758) (Chondrichthyes: Triakidae) from the Aegean Turkish coast

2010 ◽  
Vol 11 (2) ◽  
pp. 213 ◽  
Author(s):  
T. CEYHAN ◽  
O. HEPKAFADAR ◽  
Z. TOSUNOGLU
Keyword(s):  
Mesh Size ◽  
Catch Rate ◽  
Small Scale ◽  
Fishing Gear ◽  
Size Selectivity ◽  
Small Scale Fisheries ◽  
By Catch ◽  
Catch Composition

Catch rate, CPUE, biomass ratios and size selectivity from traditional longline and trammel nets of Turkish coastal small-scale fisheries were investigated in order to describe the Smooth-hound shark (Mustelus mustelus) fishery. The SELECT method was used to estimate the selectivity parameters of a variety of models for the trammel nets inner panel of 150 and 170 mm mesh sizes. Catch composition and proportion of the species were significantly different in longline and trammel nets. While mean CPUE of longline was 119.2±14.3 kg/1000 hooks, these values for 150 and 170 mm trammel nets were 5.3±1.2 kg/1000 m of net and 12.7±3.9 kg/1000 m of net, respectively. Biomass ratios of the by catch to Smooth-hound catch were found to be 1:0.32 for 150 mm trammel net, 1:0.65 for longline and 1:0.73 for 170 mm trammel net. The estimated modal lengths and spreads were found to be 91.1 and 16.2 cm for 150 mm and 103.2 and 18.4 cm for 170 mm, respectively. The modal lengths of the species as well as the spread values increased with mesh size.

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