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.

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 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 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 Komposisi hasil tangkapan soma darape di perairan pantai Desa Bajo Kecamatan Tatapaan Kabupaten Minahasa Selatan

2016 ◽  
Vol 2 (3) ◽  
Author(s):  
Jersey R. Cumentas ◽  
Lefrand Manoppo ◽  
Johnny Budiman
Keyword(s):  
Coastal Waters ◽  
Scylla Serrata ◽  
Fishing Gear ◽  
Scatophagus Argus ◽  
Predominant Species ◽  
Fish Resources ◽  
Siganus Canaliculatus ◽  
Gill Net ◽  
Catch Composition ◽  
Descriptive Method

ABSTRACT Soma darape is a traditional net fishing gear that still operated in Amurang Bay because of simple in construction, relatively inexpensive, and easy to operate using a small boat. The operation, however, sometimes is done in damaging ways to fish resources and the environment. Therefore, this research aims to study the species and composition of catches of soma darape, as well as assessing the legal size of catches. This research was done in coastal waters near mangrove of Bajo Village, Tatapaan District, South Minahasa Regency in June 2015; based on descriptive method. The catch consisted of 19 species, and the predominant species (≥ 20) were Scatophagus argus (42), Tylosurus crocodiles (33), Carangoides ferdau (27), Scylla serrata (26), Leiognathus smithursti (21) and Terapon jarbua (20). There were 6 species that have a legal size, namely Terapon jarbua (1), Scatophagus argus (18), Siganus canaliculatus (3), Lutjanus fulvus (5), Sillago analysts (16) and Scylla serrata (1). Of the total catch, only 17.89% was legal size and 82.11% was not legal size. Keywords: soma darape, gill net, catch composition, Amurang Bay   ABSTRAK Soma darape merupakan alat tangkap jaring tradisional yang masih dioperasikan di Teluk Amurang karena konstruksinya sederhana, relatif murah dan mudah dioperasikan dengan perahu ukuran kecil. Tetapi kadang-kadang pengoperasiannya dilakukan dengan cara-cara yang bersifat merusak sumberdaya ikan dan lingkungan. Oleh karena itu penelitian ini dilakukan untuk mempelajari jenis dan komposisi hasil tangkapan soma darape; serta menilai ukuran legal hasil tangkapan. Penelitian ini dilakukan di perairan pantai dekat mangrove Desa Bajo, Kecamatan Tatapaan Kabupaten Minahasa Selatan pada bulan Juni 2015; yang didasarkan pada metode deskriptif. Hasil tangkapan terdiri dari 19 spesies, dan spesies yang dominan (≥ 20 ekor) secara berturut-turut adalah ikan Scatophagus argus (42 ekor), Tylosurus crocodiles (33 ekor), Carangoides ferdau (27 ekor), Scylla serrata (26 ekor), Leiognathus smithursti (21 ekor) dan Terapon jarbua (20 ekor). Hanya 6 spesies yang memiliki ukuran legal tangkap, yaitu Terapon Jarbua (1 ekor), Scatophagus argus (18 ekor), Siganus canaliculatus (3 ekor), Lutjanus fulvus (5 ekor), Sillago analis (16 ekor) dan Scylla serrata (1 ekor). Secara total hasil tangkapan, hanya 17,89% yang layak tangkap dan 82,11% tidak layak tangkap. Kata-kata kunci: soma darape, jaring insang, komposisi tangkapan, Teluk Amurang

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 Karakteristik Penangkapan dan Produksi Ikan di Kabupaten Barito Selatan, Kalimantan Tengah

2017 ◽  
Vol 22 (4) ◽  
pp. 215
Author(s):  
Aroef Hukmanan Rais
Keyword(s):  
Flood Plain ◽  
Rainfall Rate ◽  
Fishing Gear ◽  
Large Area ◽  
Central Kalimantan ◽  
Plain Area ◽  
Gill Net ◽  
Long Line ◽  
Fishing Gears ◽  
Lake Fish

ABSTRAK  Kabupaten Barito Selatan di Provinsi Kalimantan Tengah memiliki potensi dan produksi perikanan yang besar dari perairan umum daratan. Wilayah rawa banjiran yang luas, jumlah alat tangkap yang bervariasi dan kegiatan penangkapan yang tinggi menjadi salah satu sumber potensi dan penopang perekonomian di wilayah ini. Tulisan ini menguraikan sebaran penggunaan alat tangkap berdasarkan lokasi dan musim penangkapan dan menganalisis pengaruh curah hujan terhadap laju tangkap dan komposisi hasil tangkapan pada beberapa alat tangkap di wilayah perairan Kabupaten Barito Selatan. Pengambilan sampel dilakukan dengan menggunakan bantuan 12 orang nelayan enumerator di empat lokasi berbeda. Lokasi tersebut yaitu Danau Palui, Danau Pamait, Desa Jelapat, dan Danau Ganting. Terdapat tujuh jenis alat tangkap yaitu rawai (long line), tampirai (stage trap), lunta (cash net), banjur (stake line), rengge (gill net), lukah (pot trap) dan selambau (seine net). Data curah hujan diperoleh dari stasiun BMKG Kabupaten Barito Selatan. Data dikumpulkan selama sembilan bulan dari Februari hingga Oktober 2015. Nilai produksi dan laju tangkap dikorelasikan dengan curah hujan menggunakan uji-t, sedangkan hasil tangkapan di tabulasi sesuai jenis alat tangkap dan waktu penangkapan. Diperoleh nilai korelasi signifikan antara produksi, laju tangkap terhadap curah hujan. Sebaran alat tangkap banyak diperoleh bervariasi pada wilayah rawa banjiran yang dangkal. Sebanyak 43 spesies ikan yang tertangkap menggunakan tujuh jenis alat tangkap. Alat tangkap selambau (seine net) memiliki variasi hasil tangkapan tertinggi. The South Barito Regency has high potential and production of inland fisheries in Central Kalimantan Province. The large area of flood plain, various of fishing gears and intensive fishing. This paper describes the distribution of fishing gear utilization based on location and fishing season and, analyzes  the effect of rainfall on the fishing rate and fish composition of several kind of fishing gears in South Barito Regency waters. Samples collection were done by 12 enumerators fishermen at four different locations. The locations include Palui lake, Pamait lake, Jelapat village, and Ganting lake. Fish production was tabulated based on fishing gear and fishing periode. Rainfall rate data were obtained from BMKG (Agency for Meterology, Climatology and Geophysic) of South Barito Regency. Data were collected during nine months from February to October 2015. Production and fishing rate were significantly correlated to rainfall rate with t-test.Results show that there were about 7 fishing gears such as: rawai (long line), tampirai (stage trap), lunta (cash net), banjur (stake line), rengge (gill net), lukah (pot trap) and selambau (seine net). There is a significant corellation between production and fishing rate to the rainfall rate. The distribution of fishing gear is more varied in shallow flood plain area. About 43 species of fish were caught using 7 different fishing gears. Selambau (seine net) caught the highest variation of fish species.  

scholarly journals DAMPAK PERIKANAN TANGKAP TERHADAP SUMBERDAYA IKAN DAN HABITATNYA DI PERAIRAN PANTAI TABUKAN TENGAH KEPULAUAN SANGIHE

2012 ◽  
Vol 8 (1) ◽  
pp. 12
Author(s):  
Joneidi Tamarol ◽  
Alfret Luasunaung ◽  
Johnny Budiman
Keyword(s):  
Factor Analysis ◽  
Negative Impact ◽  
Fish Resources ◽  
Fishing Gears ◽  
Analysis Strategy ◽  
Coral Reef Area ◽  
Habitat Damage ◽  
The Stability ◽  
Almost All ◽  
The Impact

Overfishing and environmental degradation from fishing activities result in changes in aquatic ecosystems, and almost all fishing gears could cause habitat damages. This study attempted to evaluate the impact of different fishing gears utilized by traditional fishermen on the fish resources and their habitats and formulate an environmenttal friendly fishing fisheries concept. Data collection used two approaches, through a long-term catch analysis and a direct field observation on the fishing process. Results found that several fishing gears used were potential to cause damages on bottom habitats due to the operational technique and the treatment to the gear itself. Beside that, some gears were also potential to unbalance the stability and the the sustainability of the fish resources due to the utilization of excessively small-sized mesh. Based on the internal factor analysis strategy (IFAS) and the external factor analysis strategy (EFAS), the use of fish traps, circling gill nets, and turtle targeting hand lines in the coral reef area we­re potential to cause direct negative impact on the coral reefs and the sustainability of the fish resources.Keywords: impact, habitat damage, resources damage, over fishing, selectivity.   Kelebihan tangkap dan degradasi lingkungan dari kegiatan perikanan mengakibatkan perubahan ekosistem perairan dan hampir semua alat tangkap ikan dapat menyebabkan kerusakan habitat. Penelitian ini bertujuan mengevaluasi dampak alat tangkap yang digunakan oleh nelayan di perairan pantai Tabukan Tengah, Kabupaten Kepulauan Sangihe terhadap sumberdaya dan lingkungan dan merumuskan konsep kebijakan pengembangan perikanan tangkap yang ramah lingkungan. Pengumpulan data dilakukan menggunakan dua pendekatan yakni menganalisis hasil tangkapan untuk jangka waktu yang panjang dan pengamatan langsung terhadap proses penangkapan ikan. Hasil menunjukkan bahwa beberapa alat tangkap yang digunakan berpotensi merusak habitat dasar perairan karena tehnik pengoperasiannya dan perlakuan terhadap alat tangkap tersebut. Di samping itu, beberapa jenis alat tangkap berpotensi merobah stabilitas dan keberlangsungan sumberdaya ikan karena penggunaan mata jaring berukuran sangat kecil. Berdasarkan strategi analisis faktor internal dan strategi analisis faktor eksternal, maka penggunaan bubu ikan, jaring insang lingkar, jala lempar dan ladung penyu di daerah terumbu karang memiliki dampak negatif bagi terumbu karang dan keberlanjutan sumberdaya ikan. Kata kunci: dampak, kerusakan habitat, kerusakan sumberdaya, tangkap lebih, selektivitas.

scholarly journals Ancaman keanekaragaman hayati (Biodiversity) terhadap ekosistem daerah penangkapan pukat hela

2020 ◽  
Vol 7 (2) ◽  
pp. 129
Author(s):  
Fauzan Ramadan ◽  
Farhan Ramdhani ◽  
Deni Efizon ◽  
Nofrizal Nofrizal
Keyword(s):  
Coastal Waters ◽  
Negative Impact ◽  
Mesh Size ◽  
Survey Method ◽  
Fishing Gear ◽  
Fish Resources ◽  
Fisheries Resources ◽  
Trawl Fishing ◽  
Penaeus Indicus ◽  
By Catch

Trawl has the size a mesh size  a small size pockets of the cod end. This allows the trawl fishing gear to potentially be a fishing gear that is not selective about the size of the fish and the species that are targeted for its catch. If this fishing gear is left, its existence will eventually have a negative impact on the sustainability of fish resources, especially in coastal waters. The purpose of this study is to calculate the composition and proportion of main catches, bycatch and discarded catches. It is expected that knowing the composition and proportion of the main, by-product and discarded catches can provide an overview of the pressure on stocks and sustainability of fisheries resources in the waters where trawl is operated. The method used in this study is a survey method. A series of survey activities were carried out directly in the field to identify and count the types of species caught by trawlers. Based on the percentage of main catch, by-catch and discard per type, it Matuta planipes are the dominant species caught by trawlers (23.65%). The main catch Parapenaeus longirostris 15.92%. In addition, the main catch caught were Parapenaeopsis sculptilis (9.787%), Penaeus merguiensis (0.646%), Metapenaeus brevicornis (10.118%), Penaeus indicus (0.029%) and Squilla mantis (0.153%). Percentage of bycatch reaches 2.245% of 10 species caught and discarded catches reach 61.103% of 25 species caught.

scholarly journals FLUKTUASI BULANAN HASIL TANGKAPAN CANTRANG YANG BERBASIS DI PELABUHAN PERIKANAN PANTAI TEGAL SARI, KOTA TEGAL

2017 ◽  
Vol 15 (1) ◽  
pp. 69
Author(s):  
Tri Ernawati ◽  
Bambang Sumiono
Keyword(s):  
Demersal Fish ◽  
Catch Rate ◽  
Eastern Coast ◽  
Central Kalimantan ◽  
Fish Resources ◽  
Catch Composition

Penelitian mengenai perikanan cantrang yang berkaitan dengan sumber daya ikan demersal sebagai hasil tangkapan utama dilaksanakan selama tahun 2006 - 2007. Penelitian ini bertujuan untuk mengetahui fluktuasi bulanan hasil tangkapan cantrang yang berbasis di Pelabuhan Perikanan Pantai Tegal Sari. Metode yang digunakan adalah survei yang meliputi pengambilan contoh dari hasil tangkapan, pencatatan buku bakul dan statistik perikanan pelabuhan. Hasil penelitian menunjukkan bahwa jumlah trip armada cantrang periode 2006 - 2007 didominansi oleh kapal berukuran 21 - 30 GT. Produksi bulanan Pelabuhan Perikanan Pantai Tegal Sari dari tahun 2004 - 2007 berfluktuasi. Secara umum, produksi bulanan pada bulan Nopember 2005 - Desember 2006 jauh lebih tinggi dibanding pada bulan-bulan di tahun 2004 dan 2007. Hal ini karena dipengaruhi oleh fluktuasi jumlah trip dan perkembangan unit penangkapan. Komposisi hasil tangkapan cantrang tahun 2006 berdasarkan pada hasil pengambilan contoh, didominansi oleh ikan coklatan (Scolopsis taeniopterus) (22%), kuniran (Upeneus spp.) (17,4%), dan swangi atau demang (Priachantus sp.) (9,7%). Ratarata laju tangkap pada tahun 2006 dan 2007 berturut-turut 333,6 dan 424 kg/hari. Laju tangkap tahun 2006 cenderung, dipengaruhi oleh fluktuasi musiman, sedangkan laju tangkap tahun 2007 cenderung naik, tidak terpengaruh oleh fluktuasi musiman. Daerah penangkapan armada cantrang yang berbasis di Pelabuhan Perikanan Pantai Tegal Sari adalah di sekitar pantai timur Lampung, Tanjung Selatan (Kalimantan Selatan), dan Tanjung Puting (Kalimantan Tengah). The research on danish seine fishery related to demersal fish resources as the main catch was carried out from 2006 - 2007. The research aimed to know monthly fluctuation of the danish seine catch in Tegal Sari landing base. The survey was conducted by sampling the catch, recording data from retailer’s book and landing base statistic. The results showed that number of trip from 2006 - 2007 was dominated by 21 to 30 GT vessel. Monthly production in Tegal Sari landing base on 2004 to 2007 was fluctuated. Generally, monthly production on November 2005 - Desember 2006 was higher than other months on 2004 and 2007. It was caused by fluctuation of trips number and unit fishing developement. The catch composition in 2006 based on sampling result, was dominated by lattice monocle bream (Scolopsis taenipterus) (22%), goatfish (Upeneus spp.) (17.4%), and purple spotted bigeye (Priachantus spp.) (9.7%). Average of catch rate in 2006 and 2007 was 335.6 and 424 kg per day, respectively. The catch rate in 2006 danish seine, Tegal Sari tended to be influenced by season fluctuation. While catch rate in 2007 increased and was not influenced by season. Fishing grounds of danish seine fleet in Tegal Sari landing base were in eastern coast of Lampung waters, Tanjung Selatan (South Kalimantan) and Tanjung Puting (Central Kalimantan), respectively.

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