Responses of the red blood cells from two high-energy-demand teleosts, yellowfin tuna ( Thunnus albacares ) and skipjack tuna ( Katsuwonus pelamis ), to catecholamines

1998 ◽  
Vol 168 (6) ◽  
pp. 405-418 ◽  
Author(s):  
T. E. Lowe ◽  
R. W. Brill ◽  
K. L. Cousins
Keyword(s):  
Red Blood Cells ◽  
Blood Cells ◽  
Energy Demand ◽  
High Energy ◽  
Yellowfin Tuna ◽  
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 Blood volume, plasma volume and circulation time in a high-energy-demand teleost, the yellowfin tuna (Thunnus albacares)

1998 ◽  
Vol 201 (5) ◽  
pp. 647-654 ◽  
Author(s):  
R Brill ◽  
K Cousins ◽  
D Jones ◽  
P G Bushnell ◽  
J F Steffensen
Keyword(s):  
Red Blood Cells ◽  
Blood Volume ◽  
Plasma Volume ◽  
Blood Cells ◽  
Circulatory System ◽  
Yellowfin Tuna ◽  
Circulation Time ◽  
Whole Body ◽  
Thunnus Albacares ◽  
Red Cell

We measured red cell space with 51Cr-labeled red blood cells, and dextran space with 500 kDa fluorescein-isothiocyanate-labeled dextran (FITC-dextran), in two groups of yellowfin tuna (Thunnus albacares). Red cell space was 13.8+/-0.7 ml kg-1 (mean +/- s.e.m.) Assuming a whole-body hematocrit equal to the hematocrit measured at the ventral aortic sampling site and no significant sequestering of 51Cr-labeled red blood cells by the spleen, blood volume was 46. 7+/-2.2 ml kg-1. This is within the range reported for most other teleosts (30-70 ml kg-1), but well below that previously reported for albacore (Thunnus alalunga, 82-197 ml kg-1). Plasma volume within the primary circulatory system (calculated from the 51Cr-labeled red blood cell data) was 32.9+/-2.3 ml kg-1. Dextran space was 37.0+/-3.7 ml kg-1. Because 500 kDa FITC-dextran appeared to remain within the vascular space, these data imply that the volume of the secondary circulatory system of yellowfin tuna is small, and its exact volume is not measurable by our methods. Although blood volume is not exceptional, circulation time (blood volume/cardiac output) is clearly shorter in yellowfin tuna than in other active teleosts. In a 1 kg yellowfin tuna, circulation time is approximately 0.4 min (47 ml kg-1/115 ml min-1 kg-1) compared with 1. 3 min (46 ml kg-1/35 ml min-1 kg-1) in yellowtail (Seriola quinqueradiata) and 1.9 min (35 ml kg-1/18 ml min-1 kg-1) in rainbow trout (Oncorhynchus mykiss). In air-breathing vertebrates, high metabolic rates are necessarily correlated with short circulation times. Our data are the first to imply that a similar relationship occurs in fishes.

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.

Vascular anatomy of the gills in a high energy demand teleost, the skipjack tuna (Katsuwonus pelamis)

2003 ◽  
Vol 297A (1) ◽  
pp. 17-31 ◽  
Author(s):  
Kenneth R. Olson ◽  
Heidi Dewar ◽  
Jeffrey B. Graham ◽  
Richard W. Brill
Keyword(s):  
Energy Demand ◽  
Vascular Anatomy ◽  
High Energy ◽  
Skipjack Tuna ◽  
Katsuwonus Pelamis

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

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
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