Skip to main content

Can the chemistry of otolith nuclei determine population structure of Patagonian toothfish Dissostichus eleginoides?

Buy Article:

$51.00 plus tax (Refund Policy)

Abstract:

Otolith nucleus chemistry resolved the population structure of Patagonian toothfish Dissostichus eleginoides, an exclusively marine species, along the Patagonian Shelf and North Scotia Ridge out to South Georgia in the Southern Ocean. Concentrations of 55Mn, 88Sr and 137Ba, ratioed to 42Ca, showed a sharp population boundary in the vicinity of the Polar Front, between South Georgia and the North Scotia Ridge. These results validated otolith nucleus chemistry as a technique for examining population structure in Patagonian toothfish, demonstrating that otolith nucleus chemistry can discriminate between populations even in fully marine environments. Moreover, the nucleus chemistry indicated population heterogeneity not previously detected, suggesting the possibility of more than one South American population, and also suggested some South American-caught fish had moved from South Georgia.

Keywords: Antarctic; Southern Ocean; laser ICP-MS; longline fishery; stock structure

Document Type: Regular Paper

DOI: https://doi.org/10.1111/j.1095-8649.2006.01144.x

Affiliations: 1: Fisheries Department, Falkland Islands Government, Stanley, Falkland Islands 2: Center for Quantitative Fisheries Ecology, Old Dominion University, 800 West 46th Street, Norfolk, VA 23508, U.S.A.

Publication date: 2006-09-01

  • Access Key
  • Free content
  • Partial Free content
  • New content
  • Open access content
  • Partial Open access content
  • Subscribed content
  • Partial Subscribed content
  • Free trial content
Cookie Policy
X
Cookie Policy
Ingenta Connect website makes use of cookies so as to keep track of data that you have filled in. I am Happy with this Find out more