Effects of predation from pelagic 0-group cod ( Gadus morhua ) on mortality rates of capelin ( Mallotus villosus ) larvae in the Barents Sea
Surveys were carried out in 2002 and 2003 to test whether predation from pelagic 0-group cod (Gadus morhua) juveniles affects mortality rates of Barents Sea capelin (Mallotus villosus) larvae. In 2002, capelin larvae were observed in 17% of the cod stomachs and predation was observed at 19 of 50 sta...
Published in: | Canadian Journal of Fisheries and Aquatic Sciences |
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Online Access: | http://dx.doi.org/10.1139/f07-137 http://www.nrcresearchpress.com/doi/pdf/10.1139/f07-137 |
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crcansciencepubl:10.1139/f07-137 2023-12-17T10:27:50+01:00 Effects of predation from pelagic 0-group cod ( Gadus morhua ) on mortality rates of capelin ( Mallotus villosus ) larvae in the Barents Sea Hallfredsson, Elvar H Pedersen, Torstein 2007 http://dx.doi.org/10.1139/f07-137 http://www.nrcresearchpress.com/doi/pdf/10.1139/f07-137 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Fisheries and Aquatic Sciences volume 64, issue 12, page 1710-1722 ISSN 0706-652X 1205-7533 Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2007 crcansciencepubl https://doi.org/10.1139/f07-137 2023-11-19T13:39:39Z Surveys were carried out in 2002 and 2003 to test whether predation from pelagic 0-group cod (Gadus morhua) juveniles affects mortality rates of Barents Sea capelin (Mallotus villosus) larvae. In 2002, capelin larvae were observed in 17% of the cod stomachs and predation was observed at 19 of 50 stations. In 2003, capelin larvae were observed in 8% of the cod stomachs and predation was observed at 19 of 37 stations. The stomach contents and zooplankton samples were dominated by copepods and krill. The number of capelin larvae in cod stomachs increased with increasing capelin larvae abundance and cod length and decreased with increasing stomach content of copepods and prey abundance of krill. The time when capelin larvae could be recognised after ingestion in the cod stomachs was estimated experimentally and depended on predator and prey lengths. The estimated overall predation mortality rate from juvenile cod on capelin larvae was about 1.5% per day for both years and can potentially have a significant effect on the survival of capelin larvae, depending on the overlap in the different years. Article in Journal/Newspaper Barents Sea Gadus morhua Copepods Canadian Science Publishing (via Crossref) Barents Sea Canadian Journal of Fisheries and Aquatic Sciences 64 12 1710 1722 |
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Open Polar |
collection |
Canadian Science Publishing (via Crossref) |
op_collection_id |
crcansciencepubl |
language |
English |
topic |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Aquatic Science Ecology, Evolution, Behavior and Systematics Hallfredsson, Elvar H Pedersen, Torstein Effects of predation from pelagic 0-group cod ( Gadus morhua ) on mortality rates of capelin ( Mallotus villosus ) larvae in the Barents Sea |
topic_facet |
Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Surveys were carried out in 2002 and 2003 to test whether predation from pelagic 0-group cod (Gadus morhua) juveniles affects mortality rates of Barents Sea capelin (Mallotus villosus) larvae. In 2002, capelin larvae were observed in 17% of the cod stomachs and predation was observed at 19 of 50 stations. In 2003, capelin larvae were observed in 8% of the cod stomachs and predation was observed at 19 of 37 stations. The stomach contents and zooplankton samples were dominated by copepods and krill. The number of capelin larvae in cod stomachs increased with increasing capelin larvae abundance and cod length and decreased with increasing stomach content of copepods and prey abundance of krill. The time when capelin larvae could be recognised after ingestion in the cod stomachs was estimated experimentally and depended on predator and prey lengths. The estimated overall predation mortality rate from juvenile cod on capelin larvae was about 1.5% per day for both years and can potentially have a significant effect on the survival of capelin larvae, depending on the overlap in the different years. |
format |
Article in Journal/Newspaper |
author |
Hallfredsson, Elvar H Pedersen, Torstein |
author_facet |
Hallfredsson, Elvar H Pedersen, Torstein |
author_sort |
Hallfredsson, Elvar H |
title |
Effects of predation from pelagic 0-group cod ( Gadus morhua ) on mortality rates of capelin ( Mallotus villosus ) larvae in the Barents Sea |
title_short |
Effects of predation from pelagic 0-group cod ( Gadus morhua ) on mortality rates of capelin ( Mallotus villosus ) larvae in the Barents Sea |
title_full |
Effects of predation from pelagic 0-group cod ( Gadus morhua ) on mortality rates of capelin ( Mallotus villosus ) larvae in the Barents Sea |
title_fullStr |
Effects of predation from pelagic 0-group cod ( Gadus morhua ) on mortality rates of capelin ( Mallotus villosus ) larvae in the Barents Sea |
title_full_unstemmed |
Effects of predation from pelagic 0-group cod ( Gadus morhua ) on mortality rates of capelin ( Mallotus villosus ) larvae in the Barents Sea |
title_sort |
effects of predation from pelagic 0-group cod ( gadus morhua ) on mortality rates of capelin ( mallotus villosus ) larvae in the barents sea |
publisher |
Canadian Science Publishing |
publishDate |
2007 |
url |
http://dx.doi.org/10.1139/f07-137 http://www.nrcresearchpress.com/doi/pdf/10.1139/f07-137 |
geographic |
Barents Sea |
geographic_facet |
Barents Sea |
genre |
Barents Sea Gadus morhua Copepods |
genre_facet |
Barents Sea Gadus morhua Copepods |
op_source |
Canadian Journal of Fisheries and Aquatic Sciences volume 64, issue 12, page 1710-1722 ISSN 0706-652X 1205-7533 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/f07-137 |
container_title |
Canadian Journal of Fisheries and Aquatic Sciences |
container_volume |
64 |
container_issue |
12 |
container_start_page |
1710 |
op_container_end_page |
1722 |
_version_ |
1785579756288212992 |