Prey selectivity by juvenile Atlantic cod Gadus morhua in three coastal habitat types
Coastal habitats are heavily subjected to eutrophication and commercial fisheries, and such alterations can affect organism interaction strengths and potentially influence trophic dynamics. A key species inhabiting coastal environments in temperate waters is the Atlantic cod Gadus morhua, which util...
Published in: | Marine Ecology Progress Series |
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2012
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Online Access: | https://lup.lub.lu.se/record/3181318 https://doi.org/10.3354/meps09932 |
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ftulundlup:oai:lup.lub.lu.se:c384882d-c984-4dc4-ba9c-66e69eb137a1 2023-05-15T15:27:07+02:00 Prey selectivity by juvenile Atlantic cod Gadus morhua in three coastal habitat types Ljungberg, Peter Nilsson, Anders Persson, Anders 2012 https://lup.lub.lu.se/record/3181318 https://doi.org/10.3354/meps09932 eng eng Inter-Research https://lup.lub.lu.se/record/3181318 http://dx.doi.org/10.3354/meps09932 wos:000309838100018 scopus:84867567266 Marine Ecology - Progress Series; 466, pp 215-223 (2012) ISSN: 1616-1599 Ecology Prey choice Functional response Trophic cascade Seagrass Macroalgae Atlantic cod Gadus morhua Shrimp contributiontojournal/article info:eu-repo/semantics/article text 2012 ftulundlup https://doi.org/10.3354/meps09932 2023-02-01T23:26:38Z Coastal habitats are heavily subjected to eutrophication and commercial fisheries, and such alterations can affect organism interaction strengths and potentially influence trophic dynamics. A key species inhabiting coastal environments in temperate waters is the Atlantic cod Gadus morhua, which utilises coastal areas for food and shelter. We used an experimental mechanistic approach to assay prey selectivity by juvenile cod when foraging on grass shrimp Palaemon elegans and brown shrimp Crangon crangon, under light and dark conditions, in 3 of the most abundant habitat types in temperate coastal environments-sand, eelgrass (artificial vegetation mimicking Zostera marina), and bladderwrack Fucus vesiculosus. Using functional response relationships from single-prey experiments, we calculated the energetically best foraging strategy for cod in the 3 habitats, i.e. feeding selectively on either of the shrimp species or on a combination of both. These predictions were tested in experiments where the cod predator was offered both prey species. Cod selected both prey species in accordance with our predictions in eelgrass and in bladderwrack under light conditions, but a lower than predicted consumption of grass shrimp was found in sand and in bladderwrack under dark conditions. Cod decreasingly selected grass shrimp with increasing habitat complexity, i.e. the highest selectivity was in sand and the lowest selectivity was in bladderwrack. As the 2 shrimp species have different trophic roles, cod selective predation may have effects on lower trophic levels. We provide a quantitative prediction of cod selective predation in habitat types that undergo degradation, and suggest that such predation can influence the trophic consequences from environmental change. Article in Journal/Newspaper atlantic cod Gadus morhua Lund University Publications (LUP) Marine Ecology Progress Series 466 215 223 |
institution |
Open Polar |
collection |
Lund University Publications (LUP) |
op_collection_id |
ftulundlup |
language |
English |
topic |
Ecology Prey choice Functional response Trophic cascade Seagrass Macroalgae Atlantic cod Gadus morhua Shrimp |
spellingShingle |
Ecology Prey choice Functional response Trophic cascade Seagrass Macroalgae Atlantic cod Gadus morhua Shrimp Ljungberg, Peter Nilsson, Anders Persson, Anders Prey selectivity by juvenile Atlantic cod Gadus morhua in three coastal habitat types |
topic_facet |
Ecology Prey choice Functional response Trophic cascade Seagrass Macroalgae Atlantic cod Gadus morhua Shrimp |
description |
Coastal habitats are heavily subjected to eutrophication and commercial fisheries, and such alterations can affect organism interaction strengths and potentially influence trophic dynamics. A key species inhabiting coastal environments in temperate waters is the Atlantic cod Gadus morhua, which utilises coastal areas for food and shelter. We used an experimental mechanistic approach to assay prey selectivity by juvenile cod when foraging on grass shrimp Palaemon elegans and brown shrimp Crangon crangon, under light and dark conditions, in 3 of the most abundant habitat types in temperate coastal environments-sand, eelgrass (artificial vegetation mimicking Zostera marina), and bladderwrack Fucus vesiculosus. Using functional response relationships from single-prey experiments, we calculated the energetically best foraging strategy for cod in the 3 habitats, i.e. feeding selectively on either of the shrimp species or on a combination of both. These predictions were tested in experiments where the cod predator was offered both prey species. Cod selected both prey species in accordance with our predictions in eelgrass and in bladderwrack under light conditions, but a lower than predicted consumption of grass shrimp was found in sand and in bladderwrack under dark conditions. Cod decreasingly selected grass shrimp with increasing habitat complexity, i.e. the highest selectivity was in sand and the lowest selectivity was in bladderwrack. As the 2 shrimp species have different trophic roles, cod selective predation may have effects on lower trophic levels. We provide a quantitative prediction of cod selective predation in habitat types that undergo degradation, and suggest that such predation can influence the trophic consequences from environmental change. |
format |
Article in Journal/Newspaper |
author |
Ljungberg, Peter Nilsson, Anders Persson, Anders |
author_facet |
Ljungberg, Peter Nilsson, Anders Persson, Anders |
author_sort |
Ljungberg, Peter |
title |
Prey selectivity by juvenile Atlantic cod Gadus morhua in three coastal habitat types |
title_short |
Prey selectivity by juvenile Atlantic cod Gadus morhua in three coastal habitat types |
title_full |
Prey selectivity by juvenile Atlantic cod Gadus morhua in three coastal habitat types |
title_fullStr |
Prey selectivity by juvenile Atlantic cod Gadus morhua in three coastal habitat types |
title_full_unstemmed |
Prey selectivity by juvenile Atlantic cod Gadus morhua in three coastal habitat types |
title_sort |
prey selectivity by juvenile atlantic cod gadus morhua in three coastal habitat types |
publisher |
Inter-Research |
publishDate |
2012 |
url |
https://lup.lub.lu.se/record/3181318 https://doi.org/10.3354/meps09932 |
genre |
atlantic cod Gadus morhua |
genre_facet |
atlantic cod Gadus morhua |
op_source |
Marine Ecology - Progress Series; 466, pp 215-223 (2012) ISSN: 1616-1599 |
op_relation |
https://lup.lub.lu.se/record/3181318 http://dx.doi.org/10.3354/meps09932 wos:000309838100018 scopus:84867567266 |
op_doi |
https://doi.org/10.3354/meps09932 |
container_title |
Marine Ecology Progress Series |
container_volume |
466 |
container_start_page |
215 |
op_container_end_page |
223 |
_version_ |
1766357576636694528 |