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JNAFS

31

M. C. Gomes, R. L. Haedrich and J.C. Rice 

Department of Biology and Ocean Sciences Centre
Memorial University of Newfoundland
St. John's, Newfoundland, Canada A1B 3X7 

Source - Journal of Northwest Atlantic Fishery Science, Volume 14: 13-27
ISSN-0250-6408

Abstract

A 16-year time series (1971-82, 1984-87) of data from spring groundfish surveys was analyzed to identify, describe, and map six broad zoogeographic areas on the Grand Bank of Newfoundland, each characterized by a relatively homogeneous and persistent biological composition (a fish assemblage). The boundaries of these areas were strongly aligned with bottom depth and oceanographic features, confirming previous evidence from worldwide studies on the major determinants of the distribution of groundfish on continental shelves. Consideration of their overall biological coherence allowed a merging and reformulation of the original six assemblage areas into four coherent zoogeographic regions. Analysis of catch rates in the two major regions so defined suggested that species composition was relatively stable over time. Whether the Grand Bank assemblages correspond to groups of functionally-linked fishes remains an open question of considerable practical and theoretical interest. The definition of areas where species broadly recur and overlap provides a useful spatial scale for studies at the community level on the Grand Bank and has implications for multispecies management.

PDF 

Language - English
Publisher - Northwest Atlantic Fisheries Organization (NAFO), Dartmouth, N.S., Canada
Publication Date - December 1992
Publication Type - Journal Article

Citation: Gomes, M.C., Haedrich, R.L. and Rice, J.C. 1992. Biogeography of Groundfish Assemblages on the Grand Bank. J. Northw. Atl. Fish. Sci. 14: 13-27. https://doi.org/10.2960/J.v14.a1
Posted in: Volume 14 - 1992
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