The Northeast Greenland Shelf as a Potential Habitat for the Northeast Arctic Cod
Observations (1978–1991) of distributions of pelagic juvenile Northeast Arctic cod (Gadus morhua L.) show that up to 1/3 of the year class are dispersed off the continental shelf and into the deep Norwegian Sea while on the way from the spring-spawning areas along the Norwegian coast to the autumn-s...
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Online Access: | https://doi.org/10.3389/fmars.2017.00304 https://doaj.org/article/f1d52f9976c34986ac0891cf97a74192 |
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ftdoajarticles:oai:doaj.org/article:f1d52f9976c34986ac0891cf97a74192 2023-05-15T14:30:23+02:00 The Northeast Greenland Shelf as a Potential Habitat for the Northeast Arctic Cod Kjersti O. Strand Svein Sundby Jon Albretsen Frode B. Vikebø 2017-09-01T00:00:00Z https://doi.org/10.3389/fmars.2017.00304 https://doaj.org/article/f1d52f9976c34986ac0891cf97a74192 EN eng Frontiers Media S.A. http://journal.frontiersin.org/article/10.3389/fmars.2017.00304/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2017.00304 https://doaj.org/article/f1d52f9976c34986ac0891cf97a74192 Frontiers in Marine Science, Vol 4 (2017) connectivity pelagic juvenile cross-shelf spawning ground nursery ground forecast Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2017 ftdoajarticles https://doi.org/10.3389/fmars.2017.00304 2022-12-31T06:12:09Z Observations (1978–1991) of distributions of pelagic juvenile Northeast Arctic cod (Gadus morhua L.) show that up to 1/3 of the year class are dispersed off the continental shelf and into the deep Norwegian Sea while on the way from the spring-spawning areas along the Norwegian coast to the autumn-settlement areas in the Barents Sea. The fate of this variable fraction of pelagic juveniles off-shelf has been an open question ever since Johan Hjort's (1914) seminal work. We have examined both the mechanisms causing offspring off-shelf transport, and their subsequent destiny using an individual-based biophysical model applied to quantify growth and dispersal. Our results show, consistently with the observations, that total off-shelf transport is highly variable between years and may be up to 27.4%. Offspring from spawning grounds around Lofoten have a higher chance of being displaced off the shelf. The off-shelf transport is dominated by episodic events where frequencies and dates vary between years. Northeasterly wind conditions over a 3–7-day period prior to the off-shelf events are a good proxy for dispersal of offspring off the shelf. Offspring transported into the open ocean are on average carried along three following routes: back onto the adjacent eastern shelves and into the Barents Sea (36.9%), recirculating within the Lofoten Basin (60.7%), or drifting northwest to the northeast Greenland shelf (2.4%). For the latter fraction the transport may exceed 12% depending on year. Recent investigations have discovered distributions of young cod on the northeast Greenland shelf indicating that conditions may support survival for Northeast Arctic cod offspring. Article in Journal/Newspaper Arctic cod Arctic Barents Sea Gadus morhua Greenland Lofoten Northeast Arctic cod Norwegian Sea Directory of Open Access Journals: DOAJ Articles Arctic Barents Sea Greenland Lofoten Lofoten Basin ENVELOPE(4.000,4.000,70.000,70.000) Norwegian Sea Frontiers in Marine Science 4 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
connectivity pelagic juvenile cross-shelf spawning ground nursery ground forecast Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
connectivity pelagic juvenile cross-shelf spawning ground nursery ground forecast Science Q General. Including nature conservation geographical distribution QH1-199.5 Kjersti O. Strand Svein Sundby Jon Albretsen Frode B. Vikebø The Northeast Greenland Shelf as a Potential Habitat for the Northeast Arctic Cod |
topic_facet |
connectivity pelagic juvenile cross-shelf spawning ground nursery ground forecast Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
Observations (1978–1991) of distributions of pelagic juvenile Northeast Arctic cod (Gadus morhua L.) show that up to 1/3 of the year class are dispersed off the continental shelf and into the deep Norwegian Sea while on the way from the spring-spawning areas along the Norwegian coast to the autumn-settlement areas in the Barents Sea. The fate of this variable fraction of pelagic juveniles off-shelf has been an open question ever since Johan Hjort's (1914) seminal work. We have examined both the mechanisms causing offspring off-shelf transport, and their subsequent destiny using an individual-based biophysical model applied to quantify growth and dispersal. Our results show, consistently with the observations, that total off-shelf transport is highly variable between years and may be up to 27.4%. Offspring from spawning grounds around Lofoten have a higher chance of being displaced off the shelf. The off-shelf transport is dominated by episodic events where frequencies and dates vary between years. Northeasterly wind conditions over a 3–7-day period prior to the off-shelf events are a good proxy for dispersal of offspring off the shelf. Offspring transported into the open ocean are on average carried along three following routes: back onto the adjacent eastern shelves and into the Barents Sea (36.9%), recirculating within the Lofoten Basin (60.7%), or drifting northwest to the northeast Greenland shelf (2.4%). For the latter fraction the transport may exceed 12% depending on year. Recent investigations have discovered distributions of young cod on the northeast Greenland shelf indicating that conditions may support survival for Northeast Arctic cod offspring. |
format |
Article in Journal/Newspaper |
author |
Kjersti O. Strand Svein Sundby Jon Albretsen Frode B. Vikebø |
author_facet |
Kjersti O. Strand Svein Sundby Jon Albretsen Frode B. Vikebø |
author_sort |
Kjersti O. Strand |
title |
The Northeast Greenland Shelf as a Potential Habitat for the Northeast Arctic Cod |
title_short |
The Northeast Greenland Shelf as a Potential Habitat for the Northeast Arctic Cod |
title_full |
The Northeast Greenland Shelf as a Potential Habitat for the Northeast Arctic Cod |
title_fullStr |
The Northeast Greenland Shelf as a Potential Habitat for the Northeast Arctic Cod |
title_full_unstemmed |
The Northeast Greenland Shelf as a Potential Habitat for the Northeast Arctic Cod |
title_sort |
northeast greenland shelf as a potential habitat for the northeast arctic cod |
publisher |
Frontiers Media S.A. |
publishDate |
2017 |
url |
https://doi.org/10.3389/fmars.2017.00304 https://doaj.org/article/f1d52f9976c34986ac0891cf97a74192 |
long_lat |
ENVELOPE(4.000,4.000,70.000,70.000) |
geographic |
Arctic Barents Sea Greenland Lofoten Lofoten Basin Norwegian Sea |
geographic_facet |
Arctic Barents Sea Greenland Lofoten Lofoten Basin Norwegian Sea |
genre |
Arctic cod Arctic Barents Sea Gadus morhua Greenland Lofoten Northeast Arctic cod Norwegian Sea |
genre_facet |
Arctic cod Arctic Barents Sea Gadus morhua Greenland Lofoten Northeast Arctic cod Norwegian Sea |
op_source |
Frontiers in Marine Science, Vol 4 (2017) |
op_relation |
http://journal.frontiersin.org/article/10.3389/fmars.2017.00304/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2017.00304 https://doaj.org/article/f1d52f9976c34986ac0891cf97a74192 |
op_doi |
https://doi.org/10.3389/fmars.2017.00304 |
container_title |
Frontiers in Marine Science |
container_volume |
4 |
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1766304230703890432 |