Bottom-up forcing of growth and condition changes in Northwest Atlantic capelin (Mallotus villosus) during the 1990s : evidence from feeding indices
Thesis (M.Sc.)--Memorial University of Newfoundland, 2008. Biology Includes bibliographical references (leaves 74-97) 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. Comparis...
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ftmemorialunivdc:oai:collections.mun.ca:theses4/106886 2023-05-15T17:23:33+02:00 Bottom-up forcing of growth and condition changes in Northwest Atlantic capelin (Mallotus villosus) during the 1990s : evidence from feeding indices Obradovich, Shannon Grace, 1980- Memorial University of Newfoundland. Dept. of Biology Grand Banks of Newfoundland; 2008 viii, 97 leaves : ill., maps Image/jpeg; Application/pdf http://collections.mun.ca/cdm/ref/collection/theses4/id/106886 Eng eng Electronic Theses and Dissertations (11.38 MB) -- http://collections.mun.ca/PDFs/theses/Obradovich_ShannonG.pdf a2544098 http://collections.mun.ca/cdm/ref/collection/theses4/id/106886 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. Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries Capelin--Grand Banks of Newfoundland--Food Capelin--Grand Banks of Newfoundland--History--20th century Capelin--Grand Banks of Newfoundland--Size Text 2008 ftmemorialunivdc 2015-08-06T19:22:11Z Thesis (M.Sc.)--Memorial University of Newfoundland, 2008. Biology Includes bibliographical references (leaves 74-97) 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. Text Newfoundland studies northern shrimp Northwest Atlantic Pandalus borealis University of Newfoundland Memorial University of Newfoundland: Digital Archives Initiative (DAI) |
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Memorial University of Newfoundland: Digital Archives Initiative (DAI) |
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ftmemorialunivdc |
language |
English |
topic |
Capelin--Grand Banks of Newfoundland--Food Capelin--Grand Banks of Newfoundland--History--20th century Capelin--Grand Banks of Newfoundland--Size |
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Capelin--Grand Banks of Newfoundland--Food Capelin--Grand Banks of Newfoundland--History--20th century Capelin--Grand Banks of Newfoundland--Size Obradovich, Shannon Grace, 1980- Bottom-up forcing of growth and condition changes in Northwest Atlantic capelin (Mallotus villosus) during the 1990s : evidence from feeding indices |
topic_facet |
Capelin--Grand Banks of Newfoundland--Food Capelin--Grand Banks of Newfoundland--History--20th century Capelin--Grand Banks of Newfoundland--Size |
description |
Thesis (M.Sc.)--Memorial University of Newfoundland, 2008. Biology Includes bibliographical references (leaves 74-97) 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. |
author2 |
Memorial University of Newfoundland. Dept. of Biology |
format |
Text |
author |
Obradovich, Shannon Grace, 1980- |
author_facet |
Obradovich, Shannon Grace, 1980- |
author_sort |
Obradovich, Shannon Grace, 1980- |
title |
Bottom-up forcing of growth and condition changes in Northwest Atlantic capelin (Mallotus villosus) during the 1990s : evidence from feeding indices |
title_short |
Bottom-up forcing of growth and condition changes in Northwest Atlantic capelin (Mallotus villosus) during the 1990s : evidence from feeding indices |
title_full |
Bottom-up forcing of growth and condition changes in Northwest Atlantic capelin (Mallotus villosus) during the 1990s : evidence from feeding indices |
title_fullStr |
Bottom-up forcing of growth and condition changes in Northwest Atlantic capelin (Mallotus villosus) during the 1990s : evidence from feeding indices |
title_full_unstemmed |
Bottom-up forcing of growth and condition changes in Northwest Atlantic capelin (Mallotus villosus) during the 1990s : evidence from feeding indices |
title_sort |
bottom-up forcing of growth and condition changes in northwest atlantic capelin (mallotus villosus) during the 1990s : evidence from feeding indices |
publishDate |
2008 |
url |
http://collections.mun.ca/cdm/ref/collection/theses4/id/106886 |
op_coverage |
Grand Banks of Newfoundland; |
genre |
Newfoundland studies northern shrimp Northwest Atlantic Pandalus borealis University of Newfoundland |
genre_facet |
Newfoundland studies northern shrimp Northwest Atlantic Pandalus borealis University of Newfoundland |
op_source |
Paper copy kept in the Centre for Newfoundland Studies, Memorial University Libraries |
op_relation |
Electronic Theses and Dissertations (11.38 MB) -- http://collections.mun.ca/PDFs/theses/Obradovich_ShannonG.pdf a2544098 http://collections.mun.ca/cdm/ref/collection/theses4/id/106886 |
op_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. |
_version_ |
1766113300074987520 |