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You searched for: Publication Year 2012 Remove constraint Publication Year: 2012 Subject Thunnus orientalis Remove constraint Subject: Thunnus orientalis
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1. Effect of environmental fluctuations on mortality of juvenile Pacific bluefin tuna, Thunnus orientalis, in closed life-cycle aquaculture

Author:
Yuichi Tsuda; Wataru Sakamoto; Shinji Yamamoto; Osamu Murata
Source:
Aquaculture 2012 v.330-333 no. pp. 142-147
ISSN:
0044-8486
Subject:
Thunnus orientalis; Thunnus thynnus; acclimation; aquaculture; body temperature; cages; environmental factors; environmental impact; fish; juveniles; light intensity; models; mortality; rearing; salinity; tanks; water temperature; Japan
Abstract:
... Although full-cycle aquaculture of Pacific bluefin tuna, Thunnus orientalis, has been established by Kinki University, Japan, most juvenile die after transfer to net cages offshore due to the stress associated with fluctuations in environmental conditions. We examined the effect of environmental conditions on mortality of juvenile using a generalized liner model (GLM). Juveniles were reared for mo ...
DOI:
10.1016/j.aquaculture.2011.12.008

2. Identification of tuna species by a real-time polymerase chain reaction technique

Author:
Po-Shun Chuang; Meng-I Chen; Jen-Chieh Shiao
Source:
Food chemistry 2012 v.133 no.3 pp. 1055-1061
ISSN:
0308-8146
Subject:
Thunnus albacares; Thunnus obesus; Thunnus orientalis; Thunnus thynnus; consumer protection; fisheries management; polymerase chain reaction; taxonomy; tuna
Abstract:
... Tuna are highly priced fishes that are often used in processed products. For effective fishery management and protection of consumers’ rights, it is important to develop a molecular method to identify the species of the tuna products. In this study we have developed a molecular method based on real-time polymerase chain reaction (real-time PCR) technology for the rapid identification of four tuna ...
DOI:
10.1016/j.foodchem.2012.01.076

3. Lack of genetic differentiation observed in Pacific bluefin tuna (Thunnus orientalis) from Taiwanese and New Zealand waters using mitochondrial and nuclear DNA markers

Author:
Mei-Chen Tseng; Peter J. Smith
Source:
Marine & freshwater research 2012 v.63 no.3 pp. 198-209
ISSN:
1323-1650
Subject:
Thunnus orientalis; demographic statistics; genes; genetic markers; genetic variation; microsatellite repeats; mitochondrial DNA; population structure; topology; New Zealand; Pacific Ocean
Abstract:
... The Pacific bluefin tuna, Thunnus orientalis, is distributed mainly in the north Pacific Ocean, but a few individuals are also found in the south Pacific Ocean. We tested the ‘one-stock’ hypothesis that genetic differentiation is absent between populations from the north and south Pacific Oceans. Three molecular markers, cytochrome (Cyt) b, control region (CR) and microsatellites, were applied to ...
DOI:
10.1071/MF11126

4. Levels of Mercury and Organohalogen Compounds in Pacific Bluefin Tuna (Thunnus orientalis) Cultured in Different Regions of Japan

Author:
Yohsuke Hisamichi; Koichi Haraguchi; Tetsuya Endo
Source:
Archives of environmental contamination and toxicology 2012 v.62 no.2 pp. 296-305
ISSN:
0090-4341
Subject:
Thunnus orientalis; baitfish; coasts; latitude; lean meat; marine environment; meat; mercury; mercury compounds; polychlorinated biphenyls; tuna; Japan
Abstract:
... Contamination levels of total mercury (T-Hg), p,p′-DDE, and polychlorinated biphenyls (PCBs) in akami (leaner meat) and toro (fatty meat) samples from Pacific bluefin tuna cultured in the southern (four locations) and central (three locations) regions of Japan were analyzed. The contamination level of T-Hg in the akami and toro samples from the southern region tended to decrease with an increase i ...
DOI:
10.1007/s00244-011-9696-5
PubMed:
21766244

5. Mercury and Cadmium Concentrations in Farmed Bluefin Tuna (Thunnus orientalis) and the Suitability of Using the Caudal Peduncle Muscle Tissue as a Monitoring Tool

Author:
M. L. Lares; M. A. Huerta-Diaz; S. G. Marinone; M. Valdez-Marquez
Source:
Journal of food protection 2012 v.75 no.4 pp. 725-730
ISSN:
0362-028X
Subject:
Thunnus orientalis; cadmium; mercury; monitoring; muscle tissues; seafoods; tuna; Japan
Abstract:
... Three regions (cephalic, central, and caudal) of the dorsal and ventral muscle tissue (R1 through R6) and the caudal peduncle muscle tissue (CPMT) of 20 farmed bluefin tuna (Thunnus orientalis) were analyzed for mercury (Hg) and cadmium (Cd) concentrations. Region 1 (cephalic-ventral) had significantly lower concentrations of Hg but significantly higher concentrations of Cd than did the other regi ...
DOI:
10.4315/0362-028X.JFP-11-447

6. Pacific bluefin tuna transport Fukushima-derived radionuclides from Japan to California

Author:
Daniel J. Madigan; Zofia Baumann; Nicholas S. Fisher
Source:
Proceedings of the National Academy of Sciences of the United States of America 2012 v.109 no.24 pp. 9483-9486
ISSN:
0027-8424
Subject:
Thunnus orientalis; cesium; ecoregions; migratory behavior; radionuclides; tuna; California; Japan; Pacific Ocean
Abstract:
... The Fukushima Dai-ichi release of radionuclides into ocean waters caused significant local and global concern regarding the spread of radioactive material. We report unequivocal evidence that Pacific bluefin tuna, Thunnus orientalis , transported Fukushima-derived radionuclides across the entire North Pacific Ocean. We measured γ-emitting radionuclides in California-caught tunas and found ¹³⁴Cs (4 ...
DOI:
10.1073/pnas.1204859109
PubMed:
22645346
PubMed Central:
PMC3386103

7. Structural and ultrastructural changes of full‐cycle cultured Pacific bluefin tuna (Thunnus orientalis) muscle slices during chilled storage

Author:
Bimol Chandra Roy; Masashi Ando; Tomohiro Itoh; Yasuyuki Tsukamasa
Source:
Journal of the science of food and agriculture 2012 v.92 no.8 pp. 1755-1764
ISSN:
0022-5142
Subject:
Thunnus orientalis; adhesion; cold storage; cutting; mitochondria; muscle strength; muscles; myofibrils; plasma membrane; sarcoplasmic reticulum; storage time; texture; tissue culture
Abstract:
... Background: This study examined the structural and ultrastructural changes of dorsal and ventral muscle tissues of full‐cycle cultured Pacific bluefin tuna (PBT), Thunnus orientalis Temminck & Schlegel 1844, cut into slices simulating sashimi and placed in chilled storage for varying periods. Structural and ultrastructural changes were determined in order to understand the physical texture by brea ...
DOI:
10.1002/jsfa.5542
PubMed:
22227737

8. Visual spectral sensitivity of photopic juvenile Pacific bluefin tuna (Thunnus orientalis)

Author:
Taro Matsumoto; Tokihiko Okada; Yoshifumi Sawada; Yasunori Ishibashi
Source:
Fish physiology and biochemistry 2012 v.38 no.4 pp. 911-917
ISSN:
0920-1742
Subject:
Thunnus orientalis; electroretinography; habitats; juveniles; pigments; seawater; surface water; vision; wavelengths
Abstract:
... Although Pacific bluefin tuna is a species that relies on vision, its photopic visual function is not well known; we therefore recorded electroretinograms to investigate photopic spectral sensitivity in juveniles of this species (49–81 days post-hatch; standard length 74–223 mm). The peak spectral sensitivity wavelength was 505 nm. We estimated that two (λₘₐₓ = 512–515 nm and 423–436 nm) or three ...
DOI:
10.1007/s10695-011-9574-0
PubMed:
22095248

9. Estimating fishing and natural mortality rates for Pacific bluefin tuna (Thunnus orientalis) using electronic tagging data

Author:
R.E. Whitlock; M.K. McAllister; B.A. Block
Source:
Fisheries research 2012 v.119-120 no. pp. 115-127
ISSN:
0165-7836
Subject:
Thunnus orientalis; models; mortality; Pacific Ocean
Abstract:
... This paper presents estimates of fishing and natural mortality rates derived from a spatially- and seasonally structured Bayesian mark-recapture model for electronically tagged Pacific bluefin tuna (PBFT) (Thunnus orientalis). Fishing mortality rates (F) were estimated by age group, year, quarter and area and ranged between 0.02 and 1.92quarter⁻¹ for the northeastern Pacific Ocean (EPO) and 0.18 a ...
DOI:
10.1016/j.fishres.2011.12.015

10. Morphology and distribution of blood fluke eggs and associated pathology in the gills of cultured Pacific bluefin tuna, Thunnus orientalis

Author:
Sho Shirakashi; Yoshiki Kishimoto; Ryuhei Kinami; Hiromitsu Katano; Katsuya Ishimaru; Osamu Murata; Naoki Itoh; Kazuo Ogawa
Source:
Parasitology international 2012 v.61 no.2 pp. 242-249
ISSN:
1383-5769
Subject:
Cardicola; Opisthorchis; Thunnus orientalis; arteries; blood; blood flukes; correlation; eggs; encapsulation; fibroblasts; gills; histopathology; internal transcribed spacers; mortality; parasitology; risk; sodium hydroxide; tuna; Japan
Abstract:
... Infestations of blood flukes of the genus Cardicola have been observed in juvenile Pacific bluefin tuna (PBT) cultured in Japan. Infected fish harbor large numbers of parasite eggs in their gills. Although the link between blood fluke infection and juvenile mortality is not clear, accumulation of parasite eggs appears to be pathogenic to the fish. We investigated the origins, general morphology/di ...
DOI:
10.1016/j.parint.2011.10.002

11. Oral treatment of praziquantel as an effective control measure against blood fluke infection in Pacific bluefin tuna (Thunnus orientalis)

Author:
Sho Shirakashi; Melanie Andrews; Yoshiki Kishimoto; Katsuya Ishimaru; Takahiko Okada; Yoshifumi Sawada; Kazuo Ogawa
Source:
Aquaculture 2012 v.326-329 no. pp. 15-19
ISSN:
0044-8486
Subject:
parasitoses; oral administration; blood; flukes; adults; praziquantel; miracidia; infection; tuna; disease control; control methods; eggs; mortality; Schistosoma; fish culture; heart ventricle; animal growth; Thunnus orientalis; fish diseases; gills; Japan
Abstract:
... Aquaculture of tuna has shown exponential growth in the recent years. In association with the global development of tuna aquaculture, problems with parasitic infections have arisen. Among the parasites found in cultured tuna, blood flukes are considered to be a significant threat as their eggs accumulate in the gills and interfere with the gas exchange process. To date, two species of blood fluke ...
DOI:
10.1016/j.aquaculture.2011.10.035