Could the planktonic stages of polar cod and Pacific sand lance compete for food in the warming Beaufort Sea?
The boreal Pacific sand lance ( Ammodytes hexapterus ) was recently detected in southeastern Beaufort Sea (Canadian Arctic), numbering as the second most abundant ichthyoplankton species after the polar cod ( Boreogadus saida ) in 2011. We contrast the hatching periods, growth, prey selectivity, and...
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fthighwire:oai:open-archive.highwire.org:icesjms:71/7/1956 2023-05-15T15:07:33+02:00 Could the planktonic stages of polar cod and Pacific sand lance compete for food in the warming Beaufort Sea? Falardeau, Marianne Robert, Dominique Fortier, Louis 2014-10-01 00:00:00.0 text/html http://icesjms.oxfordjournals.org/cgi/content/short/71/7/1956 https://doi.org/10.1093/icesjms/fst221 en eng Oxford University Press http://icesjms.oxfordjournals.org/cgi/content/short/71/7/1956 http://dx.doi.org/10.1093/icesjms/fst221 Copyright (C) 2014, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer Original Articles TEXT 2014 fthighwire https://doi.org/10.1093/icesjms/fst221 2015-02-28T22:22:56Z The boreal Pacific sand lance ( Ammodytes hexapterus ) was recently detected in southeastern Beaufort Sea (Canadian Arctic), numbering as the second most abundant ichthyoplankton species after the polar cod ( Boreogadus saida ) in 2011. We contrast the hatching periods, growth, prey selectivity, and feeding success of the planktonic stages of the two species. Polar cod hatched from January to mid-July and sand lance from mid-July to early September, precluding any competition among the larval stages. By weight, sand lance larvae grew 3.7 times faster than polar cod larvae. The co-occurring juveniles of both species fed primarily on copepods and to a lesser extent on bivalve larvae, shifting to larger prey with growth. The feeding success of both species appeared limited by the availability of their preferred prey. A significant diet overlap in juveniles >25 mm suggested potential competition for Pseudocalanus spp., Calanus spp., and bivalve larvae. However, sand lance strongly selected for nauplii while the more diversified diet of polar cod comprised mainly the copepodites of these species. Interspecific competition for food is unlikely at this time but is predicted to amplify with a climate-related reduction in the size of zooplankton prey and an increase in the abundance of sand lance. Text Arctic Beaufort Sea Boreogadus saida polar cod Zooplankton Copepods HighWire Press (Stanford University) Arctic Pacific ICES Journal of Marine Science 71 7 1956 1965 |
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HighWire Press (Stanford University) |
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English |
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Original Articles |
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Original Articles Falardeau, Marianne Robert, Dominique Fortier, Louis Could the planktonic stages of polar cod and Pacific sand lance compete for food in the warming Beaufort Sea? |
topic_facet |
Original Articles |
description |
The boreal Pacific sand lance ( Ammodytes hexapterus ) was recently detected in southeastern Beaufort Sea (Canadian Arctic), numbering as the second most abundant ichthyoplankton species after the polar cod ( Boreogadus saida ) in 2011. We contrast the hatching periods, growth, prey selectivity, and feeding success of the planktonic stages of the two species. Polar cod hatched from January to mid-July and sand lance from mid-July to early September, precluding any competition among the larval stages. By weight, sand lance larvae grew 3.7 times faster than polar cod larvae. The co-occurring juveniles of both species fed primarily on copepods and to a lesser extent on bivalve larvae, shifting to larger prey with growth. The feeding success of both species appeared limited by the availability of their preferred prey. A significant diet overlap in juveniles >25 mm suggested potential competition for Pseudocalanus spp., Calanus spp., and bivalve larvae. However, sand lance strongly selected for nauplii while the more diversified diet of polar cod comprised mainly the copepodites of these species. Interspecific competition for food is unlikely at this time but is predicted to amplify with a climate-related reduction in the size of zooplankton prey and an increase in the abundance of sand lance. |
format |
Text |
author |
Falardeau, Marianne Robert, Dominique Fortier, Louis |
author_facet |
Falardeau, Marianne Robert, Dominique Fortier, Louis |
author_sort |
Falardeau, Marianne |
title |
Could the planktonic stages of polar cod and Pacific sand lance compete for food in the warming Beaufort Sea? |
title_short |
Could the planktonic stages of polar cod and Pacific sand lance compete for food in the warming Beaufort Sea? |
title_full |
Could the planktonic stages of polar cod and Pacific sand lance compete for food in the warming Beaufort Sea? |
title_fullStr |
Could the planktonic stages of polar cod and Pacific sand lance compete for food in the warming Beaufort Sea? |
title_full_unstemmed |
Could the planktonic stages of polar cod and Pacific sand lance compete for food in the warming Beaufort Sea? |
title_sort |
could the planktonic stages of polar cod and pacific sand lance compete for food in the warming beaufort sea? |
publisher |
Oxford University Press |
publishDate |
2014 |
url |
http://icesjms.oxfordjournals.org/cgi/content/short/71/7/1956 https://doi.org/10.1093/icesjms/fst221 |
geographic |
Arctic Pacific |
geographic_facet |
Arctic Pacific |
genre |
Arctic Beaufort Sea Boreogadus saida polar cod Zooplankton Copepods |
genre_facet |
Arctic Beaufort Sea Boreogadus saida polar cod Zooplankton Copepods |
op_relation |
http://icesjms.oxfordjournals.org/cgi/content/short/71/7/1956 http://dx.doi.org/10.1093/icesjms/fst221 |
op_rights |
Copyright (C) 2014, International Council for the Exploration of the Sea/Conseil International pour l'Exploration de la Mer |
op_doi |
https://doi.org/10.1093/icesjms/fst221 |
container_title |
ICES Journal of Marine Science |
container_volume |
71 |
container_issue |
7 |
container_start_page |
1956 |
op_container_end_page |
1965 |
_version_ |
1766339038707449856 |