210 Po, Cd and Pb distribution and biomagnification in the yellowfin tuna Thunnus albacares and skipjack tuna Katsuwonus pelamis from the Eastern Pacific

2014 ◽  
Vol 87 (1-2) ◽  
pp. 98-103 ◽  
Author(s):  
J. Ruelas-Inzunza ◽  
M.F. Soto-Jiménez ◽  
A.C. Ruiz-Fernández ◽  
M. Ramos-Osuna ◽  
J. Mones-Saucedo ◽  
...  
Keyword(s):  
Yellowfin Tuna ◽  
Eastern Pacific ◽  
Thunnus Albacares ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis

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 Identification of yellowfin tuna (Thunnus albacares), mackerel tuna (Euthynnus affinis), and skipjack tuna (Katsuwonus pelamis) using deep learning

2021 ◽  
Vol 944 (1) ◽  
pp. 012009
Author(s):  
I Ayuningtias ◽  
I Jaya ◽  
M Iqbal
Keyword(s):  
Deep Learning ◽  
High Accuracy ◽  
Yellowfin Tuna ◽  
Thunnus Albacares ◽  
Skipjack Tuna ◽  
Learning Methods ◽  
Katsuwonus Pelamis ◽  
Economic Values ◽  
Euthynnus Affinis

Abstract Yellowfin tuna (Thunnus albacares), mackerel tuna (Euthynnus affinis), and skipjack tuna (Katsuwonus pelamis) have important economic values for the capture fisheries in Indonesia. Activities of identifying these fish and other types of tuna have been done manually, which can lead to errors and ultimately affect statistics, stock estimates, or traceability. The aim of this research is to use deep learning methods in identifying three species of tuna, specifically yellowfin tuna, mackerel tuna, and skipjack tuna. YOLO’s newest model, YOLOv5, was used to identify the fish. The number of epochs that produces the optimum accuracy value for use in the YOLOv5 model is 400. The values for training loss, accuracy, precision, recall and F1-Score when the model is learning with a total of 400 epochs are 0.000253, 95%, 98.1%, 93.9%, and 96%. Based on these results, the three species of tuna can be identified with high accuracy.

Cholinergic and adrenergic regulation of heart rate and ventral aortic pressure in two species of tropical tunas, Katsuwonus pelamis and Thunnus albacares

1995 ◽  
Vol 73 (9) ◽  
pp. 1681-1688 ◽  
Author(s):  
John E. Keen ◽  
Richard W. Brill ◽  
Sumi Aota ◽  
Anthony P. Farrell ◽  
David J. Randall
Keyword(s):  
Heart Rate ◽  
Aortic Pressure ◽  
Yellowfin Tuna ◽  
Thunnus Albacares ◽  
Skipjack Tuna ◽  
Adrenergic Stimulation ◽  
Small Magnitude ◽  
Katsuwonus Pelamis ◽  
Adrenergic Regulation ◽  
Adrenergic Blocker

Tonic cholinergic and adrenergic control of heart rate and ventral aorta pressure was examined in two species of tropical tunas, the skipjack tuna (Katsuwonus pelamis) and the yellowfin tuna (Thunnus albacares). Unlike that of many other teleosts, the basal heart rate in spinally blocked tunas (at 25 °C) was dominated by a cholinergic rather than an adrenergic tonus. Infusion of atropine increased the heart rate by 143 and 58% in skipjack and yellowfin tunas, respectively. Ventral aortic pulse pressure was significantly decreased and mean ventral aortic pressure was slightly increased. Blockade of β-adrenergic receptors with propranolol produced small (<6%) decreases in both heart rate and mean ventral aortic pressure, indicating a low level of tonic β-adrenergic stimulation. The small magnitude of the drop, however, suggests that tonic adrenergic regulation of heart rate and pressure is of less importance in tunas than in other teleosts, despite comparable circulating levels of adrenaline and noradrenaline. The α-adrenergic blocker phentolamine did not affect either heart rate or pressure. The intrinsic heart rate (i.e., the heart rate in the absence of cholinergic or adrenergic stimulation) was 180 beats/min in skipjack tuna and 119 beats/min in yellowfin tuna; these are the highest reported values for any teleost to date.

scholarly journals Fishing season of large pelagic fish in Idi Rayeuk waters, East Aceh, Indonesia

DEPIK ◽  
2021 ◽  
Vol 10 (2) ◽  
pp. 167-173
Author(s):  
M.A. Chaliluddin ◽  
Rizka Alfita ◽  
Thaib Rizwan ◽  
Rahmat Rizqi ◽  
Rosi Rahayu ◽  
...  
Keyword(s):  
Time Series ◽  
Water Surface ◽  
Pelagic Fish ◽  
Yellowfin Tuna ◽  
Thunnus Albacares ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis ◽  
Fishing Season ◽  
Fish Samples ◽  
Euthynnus Affinis

Large pelagic fish live on the water surface in groups. Skipjack tuna (Katsuwonus pelamis), yellowfin tuna (Thunnus albacares), mackerel tuna (Euthynnus affinis), mackerel (Scomberomous guttatus) are species of fishes that mainly catches by fishermen using purse seines. This study aims to determine the length and weight of large pelagic fish in the water of Idi Rayeuk and best the fishing season. This research was conducted in one month. Fish samples were collected from fishermen that used purse seine and landed their catches at the Idi Rayeuk Fishing Port, East Aceh. Additionally, the data was derived from the fishing port time-series during 2015 to 2019. The result showed that the yellowfin tuna (Thunnus albacares) has a length between 37 - 58 cm with a weight of 1.0 - 3.2 kg, skipjack tuna (Katsuwonus pelamis) 32 - 58 cm in length and weight 0.5 - 3.0 kg, mackerel tuna has 33 - 54 cm of length with a weight of 0.6 - 2.5 kg, and mackerel has 44 - 66 cm of length and weighing 0.7 - 1.7 kg. Its also found that the peak season for catching yellowfin tuna (Thunnus albacares) and mackerel tuna is May and June, and the lowest season in December for the yellowfin tuna, and December and January for the mackerel tuna. The peak season for skipjack fishing occurs in May, August, and October, and the low season occurs in November and December. Meanwhile, the peak season for fishing mackerel occurs in May, September, and October, while the low season occurs in January, February, and March.Keywords:Fishing seasonLarge pelagicPurse seineIdi RayeukAceh

scholarly journals KOMPOSISI JENIS DAN UKURAN IKAN YANG DITANGKAP PADA RUMPON DENGAN PANCING ULUR DI SELAT MAKASSAR

2018 ◽  
Vol 9 (2) ◽  
pp. 157
Author(s):  
Wayan Kantun ◽  
Lukman Darris ◽  
Wayan Suma Arsana
Keyword(s):  
Species Composition ◽  
Size Distribution ◽  
Deep Sea ◽  
Yellowfin Tuna ◽  
Thunnus Albacares ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis ◽  
Fish Size ◽  
Indian Mackerel ◽  
Rastrelliger Kanagurta

<p align="center"><strong><em>ABSTRACT</em></strong><strong><em></em></strong></p><p class="Abstractisi">The objective of the  researcah is to analyze the species composition and size of fish caught at shallow and deep FAD at Makassar strait. In obtaining the data, the research is using survei method carried out for four months, starting April to July 2016 at Makassar strait. The data obtained was descriptively analyzed.  The research result presented that the number of fish caught at shallow FAD 568 fish (45.92%), consisted of skipjack tuna Katsuwonus pelamis (9.86%), Bullet tuna Auxis rochei (8.65%), Yellowfin Tuna Thunnus albacares (11.16%) and Indian Mackerel Rastrelliger kanagurta (16.25%). While 669 fish (54.08%) caught at deep FAD consisted of Katsuwonus pelamis (11.80%), and  Rastrelliger kanagurta (18.35%). The size spread of skipjack tuna (23-42 cm and 29-53 cm), Bullet Tuna (16.5-25.0 cm and 18.5-28.5 cm), Yellowfin Tuna (25-120 cm and 80-160 cm) and Indian mackerel (16-25 cm and 16-25 cm) for shallow and deep FAD respectively. The fish size distribution caught at shallow and deep FAD was skipjack tuna, whereas the  Auxis rochei rochei  and Thunnus albacares had bigger size distribution in deep sea FAD, while the  Rastrelliger kanagurta had relatively similar size distribution in shallow or deep sea FAD.   </p><p class="TubuhTulisanAll"><strong><em>Keywords:</em></strong><strong><em> </em></strong><strong><em> </em></strong><em>fish size, fish species composition,</em><em> </em><em>hand-line, shallow and deep sea FAD</em><em></em></p><p align="center"><strong>ABSTRAK</strong></p><p class="Abstrakisi">Penelitian ini bertujuan untuk menganalisis komposisi jenis dan ukuran ikan yang ditangkap pada rumpon laut dangkal dan rumpon laut dalam di Selat Makassar. Penelitian ini menggunakan metode survei dalam pengambilan data dan dilakukan selama 4 bulan mulai April-Juli 2016 di Selat Makassar. Data yang diperoleh dianalisis secara deskriptif. Hasil penelitian menunjukkan bahwa ikan yang ditangkap pada rumpon laut dangkal berjumlah 568 ekor (45,92%), terdiri dari ikan cakalang 9,86%, tongkol lisong 8,65%, tuna madidihang 11,16% dan kembung lelaki 16,25%. Ikan yang ditangkap pada rumpon laut dalam berjumlah 669 ekor (54,08%), terdiri dari ikan cakalang 11,80%, tongkol lisong 12,21%, tuna madidihang 11,72% dan kembung lelaki 18,35%. Sebaran ukuran ikan cakalang berkisar 23-42 cm dan 29-53 cm,  tongkol lisong 16,5-25,0 cm dan 18,5-28,5 cm, tuna madidihang berkisar 25-120 cm dan 80-160 cm serta ikan kembung lelaki berkisar 16-25 cm dan 16-25 cm masing-masing untuk rumpon laut dangkal dan rumpon laut dalam. Distribusi ukuran ikan yang ditangkap pada rumpon laut dangkal dan rumpon dalam dari jenis ikan cakalang, ikan tongkol lisong dan tuna madidihang memiliki distribusi ukuran lebih besar pada rumpon laut dalam, sedangkan ikan kembung lelaki baik pada rumpon dangkal dan dalam memiliki distribusi ukuran relatif sama.</p><strong>Kata kunci:</strong>  ukuran ikan, komposisi jenis ikan, pancing ulur, rumpon dangkal dan dalam

scholarly journals Identification of tuna species Thunnus albacares and Katsuwonus pelamis in canned products by real-time PCR method

2019 ◽  
Vol 88 (3) ◽  
pp. 323-328 ◽  
Author(s):  
Pavel Krčmář ◽  
Zora Piskatá ◽  
Eliška Servusová
Keyword(s):  
Mitochondrial Dna ◽  
Real Time ◽  
Dna Sequences ◽  
Real Time Pcr ◽  
Yellowfin Tuna ◽  
Close Relative ◽  
Thunnus Albacares ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis ◽  
Variable Regions

Tuna species are a popular food among consumers. They are mostly sold as heat-processed canned products on the market. Different quality and price of tuna species can lead the producer to the adulteration of food products. The main difficulties in developing a method for species identification in these fish is the high similarity of DNA sequences among close relative fish species. All complete mitochondrial DNA sequences of skipjack tuna (Katsuwonus pelamis) and yellowfin tuna (Thunnus albacares) were compared to all other mitochondrial DNA sequences of tuna fish deposited in the GenBank. The most variable regions within species were determined and primers and probes were designed in this region for the species-specific DNA amplification of skipjack tuna and yellowfin tuna. Moreover, to check the content of amplifiable DNA of fish (namely tuna) in the sample, primers and a probe of mitochondrial 12S rRNA gene in the region of conservative sequence were designed. Real time PCR methods were verified by investigating 51 samples of canned tuna with the declared content of tuna species from the market; the species was confirmed in all tested samples. This method was designed to be suitable for the determination of DNA sequences especially in highly heat treated products.

scholarly journals PRODUKTIVITAS PENANGKAPAN IKAN PELAGIS BESAR MENGGUNAKAN PANCING ULUR YANG BERPANGKALAN DI KABUPATEN MAJENE (Large Pelagic Fisheries Productivity by Using Handline Based in Majene District)

2016 ◽  
Vol 6 (2) ◽  
pp. 129
Author(s):  
Alfa FP. Nelwan ◽  
. Sudirman ◽  
Mukti Zainuddin ◽  
Muh. Kurnia
Keyword(s):  
Fish Species ◽  
Pelagic Fish ◽  
Yellowfin Tuna ◽  
Fishing Ground ◽  
Thunnus Albacares ◽  
Skipjack Tuna ◽  
Fishing Activity ◽  
Katsuwonus Pelamis ◽  
Auxis Thazard ◽  
Pelagic Fisheries

<p>-------</p><p>ABSTRACT</p><p>Large pelagic fish is a fishery commodity which has a high economic value, so its development can improve the economy of communities and regions. The aim of this study was to determine the fishing productivity of large pelagic fisheries using handline. This research was conducted in July until September 2012. This study examines the fishing productivity of handling with operated by a fisherman in Majene district, West Sulawesi. Fishing activity utilizing FADs as a fishing ground. Fishing Productivity was obtained from the weight ratio of the amount of catches and duration of fishing time. Fishing productivity is determined for each type of fish catches, namely skipjack tuna (Katsuwonus Pelamis), yellowfin tuna (Thunnus albacares), and mackerel tuna (Auxis thazard). The proportion of the total catches of skipjack tuna showed greater than other fish species. The relationship between fishing productivity with the time fishing is declining with increasing duration of time fishing. Cluster analysis showed that there are two clusters of fishing productivity for 23 fishing activity. Fishing ground with the largest production was in the FADs in 118031'44,8''E and 118°34'16.0"E, and 04030'25.6"S and 118029'37,3''BT. Large pelagic fish species observed is the skipjack tuna (Katsuwonus pelamis), yellowfin tuna (Thunnus albacares), and tongkol (Auxis hazard). Fishing productivity shows the downward trend and the fishing ground for the production of tuna, mackerel and yellowfin tuna fish highest in FADs at position 04026’06,3”S and 118031’44,8’’E ; 04030’25.6”S and 118029’37,3’’E.<br /><br />Keywords: FADs, fishing productivity, handline, large pelagic, majene<br /><br />ABSTRAK<br /><br />Ikan pelagis besar merupakan salah satu komoditi perikanan yang memiliki nilai ekonomi yang relatif tinggi, sehingga pengembangan perikanan pelagis besar dapat meningkatkan ekonomi masyarakat dan daerah. Tujuan penelitian ini adalah menentukan produktivitas penangkapan ikan pelagis besar menggunakan pancing ulur. Penelitian ini dilakukan pada Bulan Juli-September 2012. Penelitian ini mengkaji produktivitas penangkapan pancing ulur yang dioperasikan nelayan di Kabupaten Majene, Sulawesi Barat. Aktivitas pemancingan memanfaatkan rumpon sebagai daerah penangkapan ikan. Produktivitas penangkapan diperoleh dari perbandingan berat jumlah hasil tangkapan dengan lama waktu pemancingan. Produktivitas penangkapan ditentukan pada masing-masing jenis ikan hasil tangkapan, yaitu cakalang (Katsuwonus pelamis), tuna ekor kuning (Thunnus albacares), dan tongkol (Auxis thazard). Proporsi jumlah hasil tangkapan menunjukkan cakalang lebih besar dibandingkan jenis ikan lainnya. Hubungan antara produktivitas penangkapan dengan lama waktu pemancingan menunjukkan kecenderungan menurun dengan bertambahnya lama waktu pemancingan. Analisis kluster menunjukkan terdapat dua kluster produktivitas penangkapan selama 23 aktivitas pemancingan. Daerah penangkapan ikan dengan produksi terbesar berada pada rumpon dengan posisi geografi 04026’06,3”LS dan118031’44,8’’BT ; 04030’25.6”LS dan 118029’37,3’’BT. Produktivitas penangkapan menunjukkan tren menurun. Posisi geografi rumpon yang memiliki produksi tuna, cakalang dan tongkol adalah pada posisi 04026’06,3”LS dan 118031’44,8’’BT ; 04030’25.6”LS dan 118029’37,3’’BT.<br /><br />Kata kunci: rumpon, produktivitas penangkapan, pancing ulur, pelagis besar, Majene</p>

Sign in / Sign up

Export Citation Format

Share Document