Interference from adults forces young red knots to forage for longer and in dangerous places
In birds and mammals, juvenile and adult foragers are often found apart from each other. In this study, we found this is also true for red knots, Calidris canutus canutus, wintering on the intertidal flats of Banc d'Arguin, Mauritania. Not only did juveniles feed separately from adults, they al...
Published in: | Animal Behaviour |
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Language: | English |
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2014
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ftnioz:oai:imis.nioz.nl:239833 2023-05-15T15:48:26+02:00 Interference from adults forces young red knots to forage for longer and in dangerous places van den Hout, P.J. van Gils, J.A. Robin, F. van der Geest, M. Dekinga, A. Piersma, T. 2014 http://imis.nioz.nl/imis.php?module=ref&refid=239833 en eng info:eu-repo/semantics/altIdentifier/wos/000331134500017 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.anbehav.2013.11.020 http://imis.nioz.nl/imis.php?module=ref&refid=239833 info:eu-repo/semantics/closedAccess %3Ci%3EAnim.+Behav.+88%3C%2Fi%3E%3A+137-146.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.anbehav.2013.11.020%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.anbehav.2013.11.020%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2014 ftnioz https://doi.org/10.1016/j.anbehav.2013.11.020 2022-05-01T13:58:45Z In birds and mammals, juvenile and adult foragers are often found apart from each other. In this study, we found this is also true for red knots, Calidris canutus canutus, wintering on the intertidal flats of Banc d'Arguin, Mauritania. Not only did juveniles feed separately from adults, they also fed at places where they were more vulnerable to predation by large falcons. That the dangerous areas used by juveniles were no better feeding areas led us to reject the food-safety trade-off that explained age-related distribution differences in many earlier studies. Instead, juveniles were displaced by adults in dyadic interactions which suggests that they suffered from interference from adults. Juveniles retreated to feeding areas that were more dangerous and yielded lower intake rates, and coped by extending foraging time by using higher, nearshore intertidal areas that were exposed for longer. When disturbed by predators in these nearshore areas, juveniles continued feeding whereas adults left. Thus, rather than compensating for increased predation danger by higher intake rates, on the Banc d'Arguin red knot juveniles foraged for longer. Article in Journal/Newspaper Calidris canutus Red Knot NIOZ Repository (Royal Netherlands Institute for Sea Research) Animal Behaviour 88 137 146 |
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Open Polar |
collection |
NIOZ Repository (Royal Netherlands Institute for Sea Research) |
op_collection_id |
ftnioz |
language |
English |
description |
In birds and mammals, juvenile and adult foragers are often found apart from each other. In this study, we found this is also true for red knots, Calidris canutus canutus, wintering on the intertidal flats of Banc d'Arguin, Mauritania. Not only did juveniles feed separately from adults, they also fed at places where they were more vulnerable to predation by large falcons. That the dangerous areas used by juveniles were no better feeding areas led us to reject the food-safety trade-off that explained age-related distribution differences in many earlier studies. Instead, juveniles were displaced by adults in dyadic interactions which suggests that they suffered from interference from adults. Juveniles retreated to feeding areas that were more dangerous and yielded lower intake rates, and coped by extending foraging time by using higher, nearshore intertidal areas that were exposed for longer. When disturbed by predators in these nearshore areas, juveniles continued feeding whereas adults left. Thus, rather than compensating for increased predation danger by higher intake rates, on the Banc d'Arguin red knot juveniles foraged for longer. |
format |
Article in Journal/Newspaper |
author |
van den Hout, P.J. van Gils, J.A. Robin, F. van der Geest, M. Dekinga, A. Piersma, T. |
spellingShingle |
van den Hout, P.J. van Gils, J.A. Robin, F. van der Geest, M. Dekinga, A. Piersma, T. Interference from adults forces young red knots to forage for longer and in dangerous places |
author_facet |
van den Hout, P.J. van Gils, J.A. Robin, F. van der Geest, M. Dekinga, A. Piersma, T. |
author_sort |
van den Hout, P.J. |
title |
Interference from adults forces young red knots to forage for longer and in dangerous places |
title_short |
Interference from adults forces young red knots to forage for longer and in dangerous places |
title_full |
Interference from adults forces young red knots to forage for longer and in dangerous places |
title_fullStr |
Interference from adults forces young red knots to forage for longer and in dangerous places |
title_full_unstemmed |
Interference from adults forces young red knots to forage for longer and in dangerous places |
title_sort |
interference from adults forces young red knots to forage for longer and in dangerous places |
publishDate |
2014 |
url |
http://imis.nioz.nl/imis.php?module=ref&refid=239833 |
genre |
Calidris canutus Red Knot |
genre_facet |
Calidris canutus Red Knot |
op_source |
%3Ci%3EAnim.+Behav.+88%3C%2Fi%3E%3A+137-146.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.anbehav.2013.11.020%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.1016%2Fj.anbehav.2013.11.020%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000331134500017 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.1016/j.anbehav.2013.11.020 http://imis.nioz.nl/imis.php?module=ref&refid=239833 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1016/j.anbehav.2013.11.020 |
container_title |
Animal Behaviour |
container_volume |
88 |
container_start_page |
137 |
op_container_end_page |
146 |
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1766383401796894720 |