Toxin constraint explains diet choice, survival and population dynamics in a molluscivore shorebird
Recent insights suggest that predators should include (mildly) toxic prey when non-toxic food is scarce. However, the assumption that toxic prey is energetically as profitable as non-toxic prey misses the possibility that non-toxic prey have other ways to avoid being eaten, such as the formation of...
Published in: | Proceedings of the Royal Society B: Biological Sciences |
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Main Authors: | , , , , , , , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | English |
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2013
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Online Access: | https://hdl.handle.net/11370/11c7b4d1-7384-42c7-a8ce-59a2ec3656ee https://research.rug.nl/en/publications/11c7b4d1-7384-42c7-a8ce-59a2ec3656ee https://doi.org/10.1098/rspb.2013.0861 https://pure.rug.nl/ws/files/6796675/2013ProcRSocBvGilsSupp.pdf https://pure.rug.nl/ws/files/6796676/2013ProcRSocBvGils.pdf |
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ftunigroningenpu:oai:pure.rug.nl:publications/11c7b4d1-7384-42c7-a8ce-59a2ec3656ee 2024-09-09T19:35:05+00:00 Toxin constraint explains diet choice, survival and population dynamics in a molluscivore shorebird van Gils, Jan A. van der Geest, Matthijs Leyrer, Jutta Oudman, Thomas Lok, Tamar Onrust, Jeroen de Fouw, Jimmy van der Heide, Tjisse van den Hout, Piet J. Spaans, Bernard Dekinga, Anne Brugge, Maarten Piersma, Theunis 2013-07-22 application/pdf https://hdl.handle.net/11370/11c7b4d1-7384-42c7-a8ce-59a2ec3656ee https://research.rug.nl/en/publications/11c7b4d1-7384-42c7-a8ce-59a2ec3656ee https://doi.org/10.1098/rspb.2013.0861 https://pure.rug.nl/ws/files/6796675/2013ProcRSocBvGilsSupp.pdf https://pure.rug.nl/ws/files/6796676/2013ProcRSocBvGils.pdf eng eng https://research.rug.nl/en/publications/11c7b4d1-7384-42c7-a8ce-59a2ec3656ee info:eu-repo/semantics/openAccess van Gils , J A , van der Geest , M , Leyrer , J , Oudman , T , Lok , T , Onrust , J , de Fouw , J , van der Heide , T , van den Hout , P J , Spaans , B , Dekinga , A , Brugge , M & Piersma , T 2013 , ' Toxin constraint explains diet choice, survival and population dynamics in a molluscivore shorebird ' , Proceedings of the Royal Society of London. Series B, Biological Sciences , vol. 280 , no. 1763 , 20130861 , pp. 0861-1-0861-10 . https://doi.org/10.1098/rspb.2013.0861 diet choice hydrogen sulphide optimal foraging theory predator-prey interactions survival rate toxins KNOTS CALIDRIS-CANUTUS AFFECTS FORAGING DECISIONS RED KNOTS BANC-DARGUIN STRATEGIC DECISIONS EDUCATED PREDATORS CHEMICAL DEFENSE APOSEMATIC PREY WARNING SIGNALS MARKED ANIMALS article 2013 ftunigroningenpu https://doi.org/10.1098/rspb.2013.0861 2024-07-01T14:49:22Z Recent insights suggest that predators should include (mildly) toxic prey when non-toxic food is scarce. However, the assumption that toxic prey is energetically as profitable as non-toxic prey misses the possibility that non-toxic prey have other ways to avoid being eaten, such as the formation of an indigestible armature. In that case, predators face a trade-off between avoiding toxins and minimizing indigestible ballast intake. Here, we report on the trophic interactions between a shorebird (red knot, Calidris canutus canutus) and its two main bivalve prey, one being mildly toxic but easily digestible, and the other being non-toxic but harder to digest. A novel toxin-based optimal diet model is developed and tested against an existing one that ignores toxin constraints on the basis of data on prey abundance, diet choice, local survival and numbers of red knots at Banc d'Arguin (Mauritania) over 8 years. Observed diet and annual survival rates closely fit the predictions of the toxin-based model, with survival and population size being highest in years when the non-toxic prey is abundant. In the 6 of 8 years when the non-toxic prey is not abundant enough to satisfy the energy requirements, red knots must rely on the toxic alternative. Article in Journal/Newspaper Calidris canutus Red Knot University of Groningen research database Proceedings of the Royal Society B: Biological Sciences 280 1763 20130861 |
institution |
Open Polar |
collection |
University of Groningen research database |
op_collection_id |
ftunigroningenpu |
language |
English |
topic |
diet choice hydrogen sulphide optimal foraging theory predator-prey interactions survival rate toxins KNOTS CALIDRIS-CANUTUS AFFECTS FORAGING DECISIONS RED KNOTS BANC-DARGUIN STRATEGIC DECISIONS EDUCATED PREDATORS CHEMICAL DEFENSE APOSEMATIC PREY WARNING SIGNALS MARKED ANIMALS |
spellingShingle |
diet choice hydrogen sulphide optimal foraging theory predator-prey interactions survival rate toxins KNOTS CALIDRIS-CANUTUS AFFECTS FORAGING DECISIONS RED KNOTS BANC-DARGUIN STRATEGIC DECISIONS EDUCATED PREDATORS CHEMICAL DEFENSE APOSEMATIC PREY WARNING SIGNALS MARKED ANIMALS van Gils, Jan A. van der Geest, Matthijs Leyrer, Jutta Oudman, Thomas Lok, Tamar Onrust, Jeroen de Fouw, Jimmy van der Heide, Tjisse van den Hout, Piet J. Spaans, Bernard Dekinga, Anne Brugge, Maarten Piersma, Theunis Toxin constraint explains diet choice, survival and population dynamics in a molluscivore shorebird |
topic_facet |
diet choice hydrogen sulphide optimal foraging theory predator-prey interactions survival rate toxins KNOTS CALIDRIS-CANUTUS AFFECTS FORAGING DECISIONS RED KNOTS BANC-DARGUIN STRATEGIC DECISIONS EDUCATED PREDATORS CHEMICAL DEFENSE APOSEMATIC PREY WARNING SIGNALS MARKED ANIMALS |
description |
Recent insights suggest that predators should include (mildly) toxic prey when non-toxic food is scarce. However, the assumption that toxic prey is energetically as profitable as non-toxic prey misses the possibility that non-toxic prey have other ways to avoid being eaten, such as the formation of an indigestible armature. In that case, predators face a trade-off between avoiding toxins and minimizing indigestible ballast intake. Here, we report on the trophic interactions between a shorebird (red knot, Calidris canutus canutus) and its two main bivalve prey, one being mildly toxic but easily digestible, and the other being non-toxic but harder to digest. A novel toxin-based optimal diet model is developed and tested against an existing one that ignores toxin constraints on the basis of data on prey abundance, diet choice, local survival and numbers of red knots at Banc d'Arguin (Mauritania) over 8 years. Observed diet and annual survival rates closely fit the predictions of the toxin-based model, with survival and population size being highest in years when the non-toxic prey is abundant. In the 6 of 8 years when the non-toxic prey is not abundant enough to satisfy the energy requirements, red knots must rely on the toxic alternative. |
format |
Article in Journal/Newspaper |
author |
van Gils, Jan A. van der Geest, Matthijs Leyrer, Jutta Oudman, Thomas Lok, Tamar Onrust, Jeroen de Fouw, Jimmy van der Heide, Tjisse van den Hout, Piet J. Spaans, Bernard Dekinga, Anne Brugge, Maarten Piersma, Theunis |
author_facet |
van Gils, Jan A. van der Geest, Matthijs Leyrer, Jutta Oudman, Thomas Lok, Tamar Onrust, Jeroen de Fouw, Jimmy van der Heide, Tjisse van den Hout, Piet J. Spaans, Bernard Dekinga, Anne Brugge, Maarten Piersma, Theunis |
author_sort |
van Gils, Jan A. |
title |
Toxin constraint explains diet choice, survival and population dynamics in a molluscivore shorebird |
title_short |
Toxin constraint explains diet choice, survival and population dynamics in a molluscivore shorebird |
title_full |
Toxin constraint explains diet choice, survival and population dynamics in a molluscivore shorebird |
title_fullStr |
Toxin constraint explains diet choice, survival and population dynamics in a molluscivore shorebird |
title_full_unstemmed |
Toxin constraint explains diet choice, survival and population dynamics in a molluscivore shorebird |
title_sort |
toxin constraint explains diet choice, survival and population dynamics in a molluscivore shorebird |
publishDate |
2013 |
url |
https://hdl.handle.net/11370/11c7b4d1-7384-42c7-a8ce-59a2ec3656ee https://research.rug.nl/en/publications/11c7b4d1-7384-42c7-a8ce-59a2ec3656ee https://doi.org/10.1098/rspb.2013.0861 https://pure.rug.nl/ws/files/6796675/2013ProcRSocBvGilsSupp.pdf https://pure.rug.nl/ws/files/6796676/2013ProcRSocBvGils.pdf |
genre |
Calidris canutus Red Knot |
genre_facet |
Calidris canutus Red Knot |
op_source |
van Gils , J A , van der Geest , M , Leyrer , J , Oudman , T , Lok , T , Onrust , J , de Fouw , J , van der Heide , T , van den Hout , P J , Spaans , B , Dekinga , A , Brugge , M & Piersma , T 2013 , ' Toxin constraint explains diet choice, survival and population dynamics in a molluscivore shorebird ' , Proceedings of the Royal Society of London. Series B, Biological Sciences , vol. 280 , no. 1763 , 20130861 , pp. 0861-1-0861-10 . https://doi.org/10.1098/rspb.2013.0861 |
op_relation |
https://research.rug.nl/en/publications/11c7b4d1-7384-42c7-a8ce-59a2ec3656ee |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1098/rspb.2013.0861 |
container_title |
Proceedings of the Royal Society B: Biological Sciences |
container_volume |
280 |
container_issue |
1763 |
container_start_page |
20130861 |
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1809904492146065408 |