Biology of the Greenland shark Somniosus microcephalus

M. A. MacNeil*, B. C. McMeans, N. E. Hussey, P. Vecsei, J. Svavarsson, K. M. Kovacs, C. Lydersen, M. A. Treble, G. B. Skomal, M. Ramsey, A. T. Fisk

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

64 Citations (Scopus)

Abstract

Greenland shark Somniosus microcephalus is a potentially important yet poorly studied cold-water species inhabiting the North Atlantic and Arctic Oceans. Broad-scale changes in the Arctic ecosystem as a consequence of climate change have led to increased attention on trophic dynamics and the role of potential apex predators such as S. microcephalus in the structure of Arctic marine food webs. Although Nordic and Inuit populations have caught S. microcephalus for centuries, the species is of limited commercial interest among modern industrial fisheries. Here, the limited historical information available on S. microcephalus occurrence and ecology is reviewed and new catch, biological and life-history information from the Arctic and North Atlantic Ocean region is provided. Given the considerable by-catch rates in high North Atlantic Ocean latitudes it is suggested that S. microcephalus is an abundant predator that plays an important, yet unrecognized, role in Arctic marine ecosystems. Slow growth and large pup sizes, however, may make S. microcephalus vulnerable to increased fishing pressure in a warming Arctic environment.

Original languageEnglish
Pages (from-to)991-1018
Number of pages28
JournalJournal of Fish Biology
Volume80
Issue number5
DOIs
Publication statusPublished - Apr 2012

Other keywords

  • Arctic
  • Climate change
  • Ecology
  • Elasmobranch
  • Organic contaminants
  • Parasites

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