Memorial University DAI: Bottom-up forcing of growth and condition changes in Northwest Atlantic capelin (Mallotus villosus) during the 1990s : evidence from feeding indices

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Title	Bottom-up forcing of growth and condition changes in Northwest Atlantic capelin (Mallotus villosus) during the 1990s : evidence from feeding indices
Author	Obradovich, Shannon Grace, 1980-
Description	Thesis (M.Sc.)--Memorial University of Newfoundland, 2008. Biology
Date	2008
Pagination	viii, 97 leaves : ill., maps
Subject	Capelin--Grand Banks of Newfoundland--Food; Capelin--Grand Banks of Newfoundland--History--20th century; Capelin--Grand Banks of Newfoundland--Size;
Degree	M.Sc.
Degree Grantor	Memorial University of Newfoundland. Dept. of Biology
Discipline	Biology
Language	Eng
Spatial Coverage	Grand Banks of Newfoundland
Notes	Includes bibliographical references (leaves 74-97)
Abstract	I investigated the persistence of changes in the biology of capelin (Mallotus villosus) of the northern Grand Banks ecosystem, in relation to the food web and other species. Comparisons of condition, size, and diet for capelin from the northern Grand Banks, northeastern Scotian Shelf and northern Gulf of St. Lawrence demonstrated that a lack of large zooplankton (euphausiids) in the Grand Banks capelin diet, following the cold period of the early 1990s, resulted in reduced growth (i.e. stunting) and condition. Examination of diet and stable isotope signatures of capelin and northern shrimp (Pandalus borealis) revealed no evidence of significant overlap in prey consumption. Thus, the increase in the abundance and distribution of pandalid shrimps during the 1990s likely did not contribute to the changes in capelin biology and feeding. All evidence pointed to bottom-up, not top-down, forcing of changes in capelin biology.
Type	Text
Format	Image/jpeg; Application/pdf
Source	Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries
Local Identifier	a2544098
Rights	The author retains copyright ownership and moral rights in this thesis. Neither the thesis nor substantial extracts from it may be printed or otherwise reproduced without the author's permission.
Collection	Electronic Theses and Dissertations
Scanning Status	Completed
PDF File	(11.38 MB) -- http://collections.mun.ca/PDFs/theses/Obradovich_ShannonG.pdf
CONTENTdm file name	106887.cpd