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Energy content and fecundity of capelin (Mallotus villosus) along a 1,500-km latitudinal gradient
Hedeholm, R.; Grønkjær, P.; Rysgaard, S. (2011). Energy content and fecundity of capelin (Mallotus villosus) along a 1,500-km latitudinal gradient. Mar. Biol. (Berl.) 158(6): 1319-1330. http://hdl.handle.net/10.1007/s00227-011-1651-5
In: Marine Biology. Springer: Heidelberg; Berlin. ISSN 0025-3162, more
Peer reviewed article  

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Keyword
    Marine

Authors  Top 
  • Hedeholm, R.
  • Grønkjær, P.
  • Rysgaard, S.

Abstract
    Capelin is a planktivorous key fish species in many subarctic ecosystems representing the link between lower trophic levels and apex predators. Little is known, however, of capelin in Greenland waters, but it has been suggested that size and growth increases due to difference in food availability and temperature conditions along a 1,500 km south–north gradient on the west coast. It is presently unknown how the qualitative state of capelin energy content is affected along this gradient. Based on 2007 and 2008 samples, we show that energy content increases with capelin length in both spawning and non-spawning fish and that it varies with latitude in spawning fish along West Greenland (60–71°N). Combining our results on energy content with information on capelin growth along the same latitudinal climate gradient demonstrates that less and lower-quality food is available to capelin predators in the south than in the north.

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