scholarly journals Dynamics of Thermal Fronts Distribution in the Flores Sea, Indonesia: An implication for locating potential skipjack tuna fishing ground

2021 ◽  
Vol 763 (1) ◽  
pp. 012045
Author(s):  
Mukti Zainuddin ◽  
St. Aisjah Farhum ◽  
Safruddin Safruddin ◽  
Rachmat Hidayat ◽  
Andi Rani Sahni Putri ◽  
...  
Keyword(s):  
Fishing Ground ◽  
Skipjack Tuna ◽  
Tuna Fishing

scholarly journals Skipjack Tuna Fishing Ground Based on Oceanography Satellite Image Data in Fisheries Management Area (FMA) 713

2020 ◽  
pp. 51-60
Author(s):  
. Safruddin ◽  
Rachmat Hidayat ◽  
Mukti Zainuddin
Keyword(s):  
Chlorophyll A ◽  
Fisheries Management ◽  
Satellite Image ◽  
Image Data ◽  
Sea Surface ◽  
Fishing Ground ◽  
Skipjack Tuna ◽  
Management Area ◽  
Tuna Fishing ◽  
Satellite Image Data

This study aimed to map the oceanographic conditions and, based on that, to determine the favorable condition of skipjack tuna fishing ground in Fisheries Management Area (FMA) 713. This condition includes sea surface temperature (SST) and chlorophyll-a concentration. The primary data, such as fishing ground position and fish catch per trip, was collected by following the fishing operations that utilized pole and line (in Bone Gulf and Flores Sea) and purse seine fishing operations (in Makassar Strait). The secondary data, such as SST and chlorophyll-a, was derived from oceanographic satellite image data. The result showed that from January to August 2019, the skipjack tuna tends to occupy off shore areas where the sea surface temperature is between 29 - 29.5 oC and the chlorophyll-a density is between 0.10 to 0.15 mg.m3.

scholarly journals SPATIO-TEMPORAL THERMAL FRONTS DISTRIBUTION DURING JANUARY-DECEMBER 2018 IN THE MAKASSAR STRAIT: AN IMPORTANT IMPLICATION FOR PELAGIC FISHERIES

2020 ◽  
Vol 6 (1) ◽  
pp. 11
Author(s):  
Mukti Zainuddin ◽  
Achmar Mallawa ◽  
Safruddin Safruddin ◽  
St. Aisjah Farhum ◽  
Rachmat Hidayat ◽  
...  
Keyword(s):  
Fishing Ground ◽  
Skipjack Tuna ◽  
Image Edge Detection ◽  
Tuna Fishing ◽  
Fishery Data ◽  
Image Edge ◽  
Spatio Temporal ◽  
Fish Aggregating Devices ◽  
Positive Effect ◽  
Pelagic Fisheries

Makassar Strait has been identified as an area of interesting studies for marine science and operational fisheries. It provides the unique ocean structures such as topographic feature, the main path of the Indonesia Throughflow (ITF) and dynamics of thermal fronts.  The aims of this study were to map the dynamic spatial and temporal of the thermal fronts, and to describe their implications to the pelagic fisheries. We used satellite data of sea surface temperature (SST) for the period of January-December 2018 with spatial and temporal resolutions of 4 km and monthly, respectively. For fishery data, we used sampling data of skipjack tuna fishing ground distributions in October and December 2018.  Thermal fronts throughout the year were estimated using a Single Image Edge Detection (SIED) algorithm and the available fishing ground data were overlain on the SST front map.  The results showed that the spatial distributions of thermal fronts along Makassar Strait tended to be different every month. However, the thermal fronts were consistently detected near the upwelling area from June to September. Skipjack tuna fishing grounds associated with fish aggregating devices (FADs) developed in the northern area of upwelling in October. Two month later, the FADs and free swimming skipjack fishing grounds again well formed around the same location. It implies that the formation of the thermal fronts after upwelling contributes the positive effect on development of pelagic fishery especially skipjack in Makassar Strait.

scholarly journals STATUS PERIKANAN HUHATE (POLE AND LINE) DI BITUNG, SULAWESI UTARA

2017 ◽  
Vol 14 (3) ◽  
pp. 313 ◽  
Author(s):  
Budi Nugraha ◽  
Enjah Rahmat
Keyword(s):  
Yellowfin Tuna ◽  
Fishing Ground ◽  
Thunnus Albacares ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis ◽  
Coryphaena Hippurus ◽  
North Sulawesi ◽  
The Status ◽  
Catch Composition ◽  
First Maturity

Tulisan ini menyajikan tentang status perikanan huhate di Bitung meliputi deskripsi unit penangkapan, daerah penangkapan, komposisi hasil tangkapan, catch per unit of effort, dan ukuran ikan pertama kali tertangkap. Data dikumpulkan selama tahun 2004 sampai dengan 2005. Hasil penelitian menunjukkan bahwa huhate yang terdapat di Bitung dioperasikan dengan kapal penangkapan yang terbuat dari kayu berukuran 50 sampai dengan 80 GT. Daerah penangkapan di sekitar lokasi rumpon di Laut Sulawesi dan Laut Maluku. Hasil tangkapan yang diperoleh terdiri atas cakalang (Katsuwonus pelamis), madidihang (Thunnus albacares), baby tuna (Thunnus spp.), dan tongkol (Auxis spp.) serta hasil tangkapan sampingan yaitu lemadang (Coryphaena hippurus) dan sunglir (Elagatis bipinnulatus). Hasil analisis catch per unit of effort diperoleh bahwa nilai catch per unit of effort baby tuna (Thunnus spp.) mengalami kenaikan pada bulan Agustus 2004, dan cakalang (Katsuwonus pelamis) mengalami kenaikan pada bulan September 2004. Hasil analisis terhadap ukuran pertama kali cakalang (Katsuwonus pelamis) tertangkap oleh huhate 49,3 FLcm. Ukuran ini lebih panjang dibandingkan ukuran pertama kali cakalang (Katsuwonus pelamis) matang gonad. Sedangkan hasil analisis terhadap ukuran pertama kali madidihang (Thunnus albacares) tertangkap oleh huhate 51,6 FLcm. Ukuran ini lebih pendek dibandingkan ukuran pertama kali madidihang (Thunnus albacares) matang gonad. This paper presents the status of pole and line fishery in Bitung of North Sulawesi, consisting of description of fishing gear, fishing ground, catch composition, catch per unit of effort, and length at first capture. Data were collected during the period of 2004 until 2005. Results show that the pole and line in Bitung operated by wooden vessels of 50 until 80 GT. The fishing grounds were the waters around FADs location in Sulawesi Sea and Maluku Sea. Catch composition consists of skipjack tuna (Katsuwonus pelamis), yellow fin tuna (Thunnus albacares), baby tuna (Thunnus spp.), and frigate tuna (Auxis spp.), while the bycatch consisted of dolphinfish (Coryphaena hippurus) and rainbow runner (Elagatis bipinnulatus). Catch per unit of effort analysis shows that catch per unit of effort value of baby tuna (Thunnus spp.) increased on August 2004, whereas catch per unit of effort value of skipjack tuna (Katsuwonus pelamis) increased on September 2004. The length at first capture of skipjack tuna (Katsuwonus pelamis) was 49,3 FLcm. The catch size was bigger than the length at first maturity for skipjack tuna (Katsuwonus pelamis). The length at first capture of yellowfin tuna (Thunnus albacares) was 51,6 FLcm. This catch size was smaller than the length at first maturity for yellowfin tuna (Thunnus albacares).

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 Fishing Season of Large Tuna from Purse Seine Fishery in Tumumpa, Manado, North Sulawesi

2019 ◽  
Vol 23 (4) ◽  
pp. 171
Author(s):  
Bram Setyadji ◽  
Umi Chodriyah
Keyword(s):  
Ecological Niche ◽  
Operation Time ◽  
Study Data ◽  
Purse Seine ◽  
Fishing Ground ◽  
Skipjack Tuna ◽  
Fishing Season ◽  
Pelagic Fishes ◽  
North Sulawesi ◽  
Purse Seine Fishery

Knowledge on seasonal fishing pattern is essential in fisheries research in order to increase the effectiveness of fishing and at the same time protecting the fishing ground from excessive fishing practices. Determining the seasonal fishing pattern of large pelagic fishes, namely large tuna (yellowfin and bigeye), small tuna (mackerel) and skipjack tuna were the objective of this study. Data from the 2013-2015 fishing operation time series were used to analyze the fishing season using the percentage average per unit effort (CPUE) method. The main focus of this study was purse seine fishery. The research showed that high fishing season of large pelagic fishes allegedly occurred during May to July, which reached its peak on May. On the other hand, low fishing season occurred during January to April, with the lowest on March. There were similarities between large tuna, small tuna and skipjack in term of their seasonal fishing pattern, although they did not show any good correlation (r<0.5). This might due to fact that even tough large tuna, small tuna and skipjack tuna shared the same ecological niche but apparently, they did not show any interaction (symbiosis) but competition.

scholarly journals Efektivitas penggunaan rumpon sebagai daerah penangkapan ikan di Perairan Pusong Kota Lhokseumawe

DEPIK ◽  
2018 ◽  
Vol 7 (2) ◽  
pp. 119-126
Author(s):  
Makwiyah A. Chaliluddin ◽  
Ratna M. Aprilla ◽  
Junaidi M. Affan ◽  
Abdullah A. Muhammadar ◽  
Heri Rahmadani ◽  
...  
Keyword(s):  
Purse Seine ◽  
Fishing Ground ◽  
Survey Method ◽  
Skipjack Tuna ◽  
Tuna Fish ◽  
Katsuwonus Pelamis ◽  
Direct Sampling ◽  
Euthynnus Affinis ◽  
Fish Aggregating Devices

The existence of fish aggregating devices (FADs) in a waters is able to establish a new fishing ground that potential waters. FADs are able to attract the attention of the gathering of fishes and other aquayic organisms around it, increasing the density of fish around FADs can increase the chances of successful catching operation, and therefore the FADs has benefited significantly to increase the capture fishery production significantly. The purposes of the research were to evaluate the catching composition of purse seine production  using FADs and non FADs, and to examine the fectiveness of FADs. This research was conducted on February 1 - 28, 2018 located at Pusong Waters, Lhokseumawe City. The survey  method was used in this study. The direct sampling by following the fisherman in fishing activities was performed both the purse seine with FADs and no FADs. Total purse seine catches during the research were 4,320 kg consisting of Long Jawed Mackerel (Rastrelliger sp.) 1,280 kg (29.63%), Decapterus Fish ( Decapterus sp.) 350 kg (8,107%), skipjack tuna (Katsuwonus pelamis) 845 kg (19.56 %), tuna fish (Euthynnus affinis) 720 kg (16.67%), Torpedo scad (Megalaspis cordyla) 300 kg (6.94%), Queenfish 140 kg (3.24%), and starry triggerfish (Abalistes stellaris) 685 kg (15.86%). It was concluded that the purse seine used FADs is more effective  compared to the a purse seine that does not use FADs.Keberadaan rumpon di suatu perairan mampu menarik perhatian berkumpulnya ikan dan organisme lain disekitarnya, sehingga dapat meningkatkan hasil tangkapan ikan. Penelitian ini bertujuan untuk menganalisis komposisi hasil tangkapan purse seine yang menggunakan rumpon dan purse seine yang tidak menggunakan rumpon, dan menilai efektivitas rumpon dalam mengumpulkan ikan. Penelitian ini dilaksanakan pada 01 - 28 Februari 2018 bertempat di Perairan Pusong, Kota Lhokseumawe. Metode penelitian yang digunakan adalah metode survei, yaitu dengan mengikuti nelayan dalam kegiatan penangkapan ikan, baik nelayan purse seine yang menggunakan rumpon dan nelayan purse seine yang tidak menggunakan rumpon. Data ikan hasil tangkapan yang diperoleh dihitung jumlah ikan hasil tangkapan dan diidentifikasi spesies ikan dan selanjutnya dibandingkan dengan hasil tangkapan nelayan yang menggunakan rumpon dan ikan hasil tangkapan nelayan yang tidak menggunakan rumpon. Total hasil tangkapan purse seine selama penelitian sebanyak 4.320 kg terdiri dari kembung (Rastrelliger sp.) 1.280 kg (29,63%), layang (Decapterus sp.) 350 kg (8,107%), cakalang (Katsuwonus pelamis) 845 kg (19,56%), tongkol (Euthynnus affinis) 720 kg (16,67 %), tegang ekor/tetengkek (Megalaspis cordyla) 300 kg (6,94 %), talang/daun bamboo (Scomberoides lysan) 140 kg (3,24%), dan ayam-ayam (Abalistes stellaris) 685 kg (15,86 %).  Dari kedua jenis kegiatan penangkapan ikan tersebut, maka purse seine menggunakan rumpon lebih efektif dibandingkan purse seine yang tidak menggunakan rumpon sebagai daerah penangkapan ikan.

scholarly journals STATUS KEBERLANJUTAN PERIKANAN HUHATE BERDASARKAN ASPEK BIOLOGI DI PPI DUFA-DUFA KOTA TERNATE

1970 ◽  
Vol 10 (1) ◽  
pp. 117-116
Author(s):  
Irham . ◽  
Amirul Karman ◽  
Kusdi Hi Iksan
Keyword(s):  
Size Structure ◽  
Economic Value ◽  
Fork Length ◽  
Pelagic Fish ◽  
Fishing Ground ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis ◽  
Strategic Location ◽  
Catch Composition ◽  
Fish Aggregating Devices

ABSTRACTTernate Island lies in a strategic location as it is situated in the middle of  the main fishing ground for skipjack (Katsuwonus pelamis) fishing using pole and line (huhate) and fish aggregating devices (FADs). As typical pelagic fish, skipjack that is gathered near the water surface is the younger fish, likewise the ones which are caught around FADs. Therefore, this fishing method has caused serious problem due to the domination of young fish and increasing bycatch and discard. The objective of this research is to analyze the size structure of the fork length, appropriate size for catching, catch composition, bycatch and discard level. Pole and line catch samples were collected in 3 months fromMay to July 2018. The results show that in average, skipjack tuna caught in the study location was undersize. The total catch is predominantly targeted fish which has a higher economic value compared to bycatch and discarded fish. Even though bycatch in the pole and line fisheries are low, reduction efforts are still required. which can be done by sorting bycatch and unwanted fish then discard it into the sea when the fish is still alive.Keywords: biology, pole and line, sustainability status, Ternate City ABSTRAKPosisi Pulau Ternate sangat strategis karena berada di tengah perairan yang menjadi daerah operasi penangkapan cakalang (Katsuwonus pelamis) dengan alat tangkap huhate (pole and line) yang dibantu dengan penggunaan rumpon. Sebagaimana ikan pelagis lainnya,  ikan-ikan cakalang yang berkumpul di lapisan permukaan air cenderung tergolong ikan-ikan muda. Oleh karena itu, cakalang yang tertangkap di sekitar rumpon juga cenderung ikan-ikan yang masih muda. Fenomena ini menyebabkan munculnya sebuah masalah besar, yaitu dominasi ikan-ikan muda, selain itu juga sering tertangkap ikan yang bukan target tangkap yang terdiri dari bycatch dan discards. Tujuan dari penelitian ini adalah menganalisis struktur ukuran panjang cagak dan ukuran cakalang layak tangkap, komposisi hasil tangkapan, persentase bycatch dan discards. Sampel hasil tangkapan huhate dikumpulkan selama 3 bulan (Mei sampai Juli 2018). Hasil penelitian menunjukkan bahwa rataan cakalang di lokasi penelitian didominasi ukuran belum layak tangkap. Total hasil tangkapan didominasi ikan target, sementara itu bycatch yang tertangkap memiliki nilai ekonomis yang baik dan tidak ditemukan discards. Walaupun bycatch pada perikanan huhate rendah namun usaha-usaha untuk meminimumkan tetap perlu dilakukan. Salah satu usaha yang bisa dilakukan adalah menyortir hasil tangkapan, ada apabila ada ikan yang akan dibuang ke laut, dilakukan dalam keadaan masih hidup.Kata Kunci: Biologi, huhate (pole and line), status keberlanjutan, Kota Ternate

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