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Distribution and diet of Cyclothone microdon (Gonostomatidae) in a submarine canyon

  • S.E. Thompson (a1) and T.J. Kenchington (a1)
Abstract

The primarily bathypelagic gonostomatid Cyclothone microdon, amongst the most abundant of all vertebrates, remains poorly known. We describe its diet in The Gully, a very large submarine canyon off Nova Scotia, Canada, based on the stomach contents of specimens caught by midwater trawl. In The Gully, C. microdon had a shallower distribution than in open ocean and primarily fed at mesopelagic depths. Most of its diet comprised vertically migrant calanoid copepods, while its secondary prey was conchoeciinid ostracods. Both were typical of the food eaten in other regions by its mesopelagic congeners and were consistent with the results of the only previous dietary study of C. microdon.

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Copyright
This is a work of the Canadian Government and is not subject to copyright protection in Canada. This is an Open Access article, distributed under the terms of the Creative Commons Attribution licence (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted re-use, distribution, and reproduction in any medium, provided the original work is properly cited.
Corresponding author
Correspondence should be addressed to: T.J. Kenchington, Department of Fisheries & Oceans, Maritimes Region, Ocean Ecosystem Sciences Division, Bedford Institute of Oceanography, PO Box 1006, Dartmouth, Nova Scotia B2Y 4A2, Canada email: gadus@istar.ca
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