Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Movements of albacore tuna ( Thunnus alalunga ) in the South Pacific: Evidence from parasites

Movements of albacore tuna ( Thunnus alalunga ) in the South Pacific: Evidence from parasites 227 111 111 1 1 J. B. Jones Fisheries Research Centre Ministry of Agriculture and Fisheries P.O. Box 297 Wellington New Zealand Abstract Parasites were collected from over 400 albacore ( Thunnus alalunga ) caught by surface trolling and longlining in the south-west Pacific between 1985 and 1988. Parasites found included 1 apicomplexan, 3 nematode species, 4 cestode species, 1 acanthocephalan, 12 digenean species and 3 copepod species. Twelve of these parasite species which could be accurately recognised and counted were used in the subsequent analyses. Parasite data from albacore caught around New Zealand show a decrease in prevalence of three didymozoid parasites with increasing fish length up to a fork length of 70 to 79 cm. The subsequent increase in prevalence of these didymozoids in large longline-caught fish is consistent with fish returning from spawning in tropical waters where re-infection is presumed to occur. Albacore collected at widely separate locations in the south-west Pacific have differences in parasite prevalence, supporting an hypothesis that juvenile albacore move south to New Zealand from the tropics and do not return until the onset of sexual maturity. Albacore appear to move along the subtropical convergence zone, as indicated by a decline in prevalence and abundance of Anisakis simplex and Hepatoxylon trichiuri from New Zealand to the central South Pacific. This is supported by tagging and seasonal movements of the fishery. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Marine Biology Springer Journals

Movements of albacore tuna ( Thunnus alalunga ) in the South Pacific: Evidence from parasites

Marine Biology , Volume 111 (1) – Oct 1, 1991

Loading next page...
 
/lp/springer-journals/movements-of-albacore-tuna-thunnus-alalunga-in-the-south-pacific-SzV98VWJQe

References (31)

Publisher
Springer Journals
Copyright
Copyright © 1991 by Springer-Verlag
Subject
Life Sciences; Biomedicine general; Oceanography; Ecology; Microbiology; Zoology
ISSN
0025-3162
eISSN
1432-1793
DOI
10.1007/BF01986338
Publisher site
See Article on Publisher Site

Abstract

227 111 111 1 1 J. B. Jones Fisheries Research Centre Ministry of Agriculture and Fisheries P.O. Box 297 Wellington New Zealand Abstract Parasites were collected from over 400 albacore ( Thunnus alalunga ) caught by surface trolling and longlining in the south-west Pacific between 1985 and 1988. Parasites found included 1 apicomplexan, 3 nematode species, 4 cestode species, 1 acanthocephalan, 12 digenean species and 3 copepod species. Twelve of these parasite species which could be accurately recognised and counted were used in the subsequent analyses. Parasite data from albacore caught around New Zealand show a decrease in prevalence of three didymozoid parasites with increasing fish length up to a fork length of 70 to 79 cm. The subsequent increase in prevalence of these didymozoids in large longline-caught fish is consistent with fish returning from spawning in tropical waters where re-infection is presumed to occur. Albacore collected at widely separate locations in the south-west Pacific have differences in parasite prevalence, supporting an hypothesis that juvenile albacore move south to New Zealand from the tropics and do not return until the onset of sexual maturity. Albacore appear to move along the subtropical convergence zone, as indicated by a decline in prevalence and abundance of Anisakis simplex and Hepatoxylon trichiuri from New Zealand to the central South Pacific. This is supported by tagging and seasonal movements of the fishery.

Journal

Marine BiologySpringer Journals

Published: Oct 1, 1991

There are no references for this article.