A review of factors contributing to the decline of Newfoundland and Labrador snow crab (Chionoecetes opilio)

A review of factors contributing to the decline of Newfoundland and Labrador snow crab... The Newfoundland and Labrador (NL) snow crab resource, presently the basis of the most important commercial fishery in the region, is in decline. Short-, mid-, and long-term recruitment prospects are deemed poor in most areas. Fishery declines have been most apparent in the north, beginning in the mid- to late 2000s, but are expected to begin in the more productive southern areas in the near future. A multitude of emergent theories to explain the resource decline have been hypothesized as contributing factors, including fishing, trawling impacts, seismic activities, disease, predation, and increasing temperature. This study comprehensively reviews and qualitatively relates the results of recent research and literature on each of these factors. We find that several factors may be contributing to a lack of recruitment in the stock, but diminishing productivity resulting from a warming oceanographic regime is the primary cause of the resource decline. Further, we postulate that trends occurring in the snow crab stock are indicative of a broader-scale ecological regime shift occurring along the NL shelf. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Reviews in Fish Biology and Fisheries Springer Journals

A review of factors contributing to the decline of Newfoundland and Labrador snow crab (Chionoecetes opilio)

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Publisher
Springer Journals
Copyright
Copyright © 2014 by Springer International Publishing Switzerland
Subject
Life Sciences; Freshwater & Marine Ecology; Zoology
ISSN
0960-3166
eISSN
1573-5184
D.O.I.
10.1007/s11160-014-9349-7
Publisher site
See Article on Publisher Site

Abstract

The Newfoundland and Labrador (NL) snow crab resource, presently the basis of the most important commercial fishery in the region, is in decline. Short-, mid-, and long-term recruitment prospects are deemed poor in most areas. Fishery declines have been most apparent in the north, beginning in the mid- to late 2000s, but are expected to begin in the more productive southern areas in the near future. A multitude of emergent theories to explain the resource decline have been hypothesized as contributing factors, including fishing, trawling impacts, seismic activities, disease, predation, and increasing temperature. This study comprehensively reviews and qualitatively relates the results of recent research and literature on each of these factors. We find that several factors may be contributing to a lack of recruitment in the stock, but diminishing productivity resulting from a warming oceanographic regime is the primary cause of the resource decline. Further, we postulate that trends occurring in the snow crab stock are indicative of a broader-scale ecological regime shift occurring along the NL shelf.

Journal

Reviews in Fish Biology and FisheriesSpringer Journals

Published: Apr 17, 2014

References

  • The influence of low-frequency variability and long-term trends in the North Atlantic sea surface temperature in Irish waters
    Cannaby, H; Husrevoglu, YS
  • The response of Atlantic cod (Gadus morhua) to future climate change
    Drinkwater, KF
  • Fishery-induced changes in Norwegian red king crab (Paralithodes camtschaticus) reproductive potential
    Hjelset, AM
  • Reduced size composition and fecundity related to fishery and invasion history in the introduced red king crab (Paralithodes camtschaticus) in Norwegian waters
    Hjelset, AM; Nilssen, EM; Sundet, JH
  • Effects of seismic and marine noise on invertebrates: a review
    Moryiasu, M; Allain, R; Benhalima, K; Claytor, R
  • Ecosystem responses to recent oceanographic variability in high-latitude Northern Hemisphere ecosystems
    Mueter, FJ; Broms, C; Drinkwater, KF; Friedland, KD; Hare, JA; Hunt, GL; Melle, W; Taylor, M
  • Moulting and mating of snow crabs, Chionoecetes opilio (O. Fabricius), in shallow waters of the Northewestern Gulf of St. Lawrence
    Sainte-Marie, B; Hazel, F
  • Regime shifts and recruitment dynamics of snow crab, Chionecetes opilio, in the eastern Bering Sea
    Szuwalski, C; Punt, AE

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