Predation on early life stages is decisive for year-class strength in the Barents Sea capelin (Mallotus villosus) stock

Published version. Source at http://doi.org/10.1093/icesjms/fsv177 . Year-class strength of Barents Sea capelin has been monitored closely since the early 1970s and during this ∼45 years period three short periods of almost total recruitment failure leading to three stock collapses have been observe...

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Published in:ICES Journal of Marine Science: Journal du Conseil
Main Authors: Gjøsæter, Harald, Hallfredsson, Elvar H., Mikkelsen, Nina, Bogstad, Bjarte, Pedersen, Torstein
Format: Article in Journal/Newspaper
Language:English
Published: Oxford University Press 2015
Subjects:
Online Access:https://hdl.handle.net/10037/8625
https://doi.org/10.1093/icesjms/fsv177
id ftunivtroemsoe:oai:munin.uit.no:10037/8625
record_format openpolar
spelling ftunivtroemsoe:oai:munin.uit.no:10037/8625 2023-05-15T15:38:40+02:00 Predation on early life stages is decisive for year-class strength in the Barents Sea capelin (Mallotus villosus) stock Gjøsæter, Harald Hallfredsson, Elvar H. Mikkelsen, Nina Bogstad, Bjarte Pedersen, Torstein 2015-10-11 https://hdl.handle.net/10037/8625 https://doi.org/10.1093/icesjms/fsv177 eng eng Oxford University Press ICES Journal of Marine Science 2015 FRIDAID 1289427 doi:10.1093/icesjms/fsv177 1095-9289 https://hdl.handle.net/10037/8625 URN:NBN:no-uit_munin_8171 openAccess Barents Sea capelin mortality predation recruitment VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 Journal article Tidsskriftartikkel Peer reviewed 2015 ftunivtroemsoe https://doi.org/10.1093/icesjms/fsv177 2021-06-25T17:54:32Z Published version. Source at http://doi.org/10.1093/icesjms/fsv177 . Year-class strength of Barents Sea capelin has been monitored closely since the early 1970s and during this ∼45 years period three short periods of almost total recruitment failure leading to three stock collapses have been observed. These events triggered much attention since there was a large commercial fishery for capelin, but also because of observed ecosystem effects attributed to the first of these collapse events. This attention motivated research to clarify mechanisms behind the recruitment failures, and many papers have been published regarding the causes of these events. Here, we review this literature and try to put the various investigations into context. Most of the research conducted gives evidence in favour of a hypothesis that was formulated after the first recruitment failure event in the mid-1980s that predation on capelin larvae was the main cause of recruitment failure. Most studies also support the hypothesis that young herring (Clupea harengus) was the main predator on capelin larvae, but other predators like young-of-the-year cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) probably also played a role. Investigations of the effect of predators such as haddock, red king crab (Paralithodes camtschaticus), diving birds, and capelin on the demersal capelin eggs have also been reviewed. Usually, these predators are found to consume capelin eggs, but most likely not to an extent that would affect the recruitment to a noticeable degree. It is concluded that the predation on capelin larvae is the main reason for the observed recruitment failures, although predation from the predators reviewed here can hardly be the only reason for almost total recruitment failures observed in some periods. Article in Journal/Newspaper Barents Sea Gadus morhua Paralithodes camtschaticus Red king crab University of Tromsø: Munin Open Research Archive Barents Sea ICES Journal of Marine Science: Journal du Conseil 73 2 182 195
institution Open Polar
collection University of Tromsø: Munin Open Research Archive
op_collection_id ftunivtroemsoe
language English
topic Barents Sea
capelin
mortality
predation
recruitment
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497
spellingShingle Barents Sea
capelin
mortality
predation
recruitment
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497
Gjøsæter, Harald
Hallfredsson, Elvar H.
Mikkelsen, Nina
Bogstad, Bjarte
Pedersen, Torstein
Predation on early life stages is decisive for year-class strength in the Barents Sea capelin (Mallotus villosus) stock
topic_facet Barents Sea
capelin
mortality
predation
recruitment
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497
VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497
description Published version. Source at http://doi.org/10.1093/icesjms/fsv177 . Year-class strength of Barents Sea capelin has been monitored closely since the early 1970s and during this ∼45 years period three short periods of almost total recruitment failure leading to three stock collapses have been observed. These events triggered much attention since there was a large commercial fishery for capelin, but also because of observed ecosystem effects attributed to the first of these collapse events. This attention motivated research to clarify mechanisms behind the recruitment failures, and many papers have been published regarding the causes of these events. Here, we review this literature and try to put the various investigations into context. Most of the research conducted gives evidence in favour of a hypothesis that was formulated after the first recruitment failure event in the mid-1980s that predation on capelin larvae was the main cause of recruitment failure. Most studies also support the hypothesis that young herring (Clupea harengus) was the main predator on capelin larvae, but other predators like young-of-the-year cod (Gadus morhua) and haddock (Melanogrammus aeglefinus) probably also played a role. Investigations of the effect of predators such as haddock, red king crab (Paralithodes camtschaticus), diving birds, and capelin on the demersal capelin eggs have also been reviewed. Usually, these predators are found to consume capelin eggs, but most likely not to an extent that would affect the recruitment to a noticeable degree. It is concluded that the predation on capelin larvae is the main reason for the observed recruitment failures, although predation from the predators reviewed here can hardly be the only reason for almost total recruitment failures observed in some periods.
format Article in Journal/Newspaper
author Gjøsæter, Harald
Hallfredsson, Elvar H.
Mikkelsen, Nina
Bogstad, Bjarte
Pedersen, Torstein
author_facet Gjøsæter, Harald
Hallfredsson, Elvar H.
Mikkelsen, Nina
Bogstad, Bjarte
Pedersen, Torstein
author_sort Gjøsæter, Harald
title Predation on early life stages is decisive for year-class strength in the Barents Sea capelin (Mallotus villosus) stock
title_short Predation on early life stages is decisive for year-class strength in the Barents Sea capelin (Mallotus villosus) stock
title_full Predation on early life stages is decisive for year-class strength in the Barents Sea capelin (Mallotus villosus) stock
title_fullStr Predation on early life stages is decisive for year-class strength in the Barents Sea capelin (Mallotus villosus) stock
title_full_unstemmed Predation on early life stages is decisive for year-class strength in the Barents Sea capelin (Mallotus villosus) stock
title_sort predation on early life stages is decisive for year-class strength in the barents sea capelin (mallotus villosus) stock
publisher Oxford University Press
publishDate 2015
url https://hdl.handle.net/10037/8625
https://doi.org/10.1093/icesjms/fsv177
geographic Barents Sea
geographic_facet Barents Sea
genre Barents Sea
Gadus morhua
Paralithodes camtschaticus
Red king crab
genre_facet Barents Sea
Gadus morhua
Paralithodes camtschaticus
Red king crab
op_relation ICES Journal of Marine Science 2015
FRIDAID 1289427
doi:10.1093/icesjms/fsv177
1095-9289
https://hdl.handle.net/10037/8625
URN:NBN:no-uit_munin_8171
op_rights openAccess
op_doi https://doi.org/10.1093/icesjms/fsv177
container_title ICES Journal of Marine Science: Journal du Conseil
container_volume 73
container_issue 2
container_start_page 182
op_container_end_page 195
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