Lower foraging efficiency of offspring constrains use of optimal habitat in birds with extended parental care
Keywords: food intake rate; giving-up density; habitat switch; parental costs; social dominance After reproducing successfully, birds with extended parental care form family groups. Despite being the dominant social unit, such family groups have been reported to switch to alternative habitat earlier...
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Format: | Article in Journal/Newspaper |
Language: | English |
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2014
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Online Access: | https://pure.knaw.nl/portal/en/publications/e0ab80c0-841f-4bef-96e2-ed62f1a3e7a1 https://doi.org/10.1111/ibi.12137 https://hdl.handle.net/20.500.11755/e0ab80c0-841f-4bef-96e2-ed62f1a3e7a1 http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1474-919X http://mda.vliz.be/mda/directlink.php?fid=VLIZ_00000354_1390570224 |
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ftknawnlpublic:oai:pure.knaw.nl:publications/e0ab80c0-841f-4bef-96e2-ed62f1a3e7a1 2024-09-15T18:03:25+00:00 Lower foraging efficiency of offspring constrains use of optimal habitat in birds with extended parental care Nolet, B.A. Gyimesi, A. van Lith, B. 2014 https://pure.knaw.nl/portal/en/publications/e0ab80c0-841f-4bef-96e2-ed62f1a3e7a1 https://doi.org/10.1111/ibi.12137 https://hdl.handle.net/20.500.11755/e0ab80c0-841f-4bef-96e2-ed62f1a3e7a1 http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1474-919X http://mda.vliz.be/mda/directlink.php?fid=VLIZ_00000354_1390570224 eng eng https://pure.knaw.nl/portal/en/publications/e0ab80c0-841f-4bef-96e2-ed62f1a3e7a1 info:eu-repo/semantics/closedAccess Nolet , B A , Gyimesi , A & van Lith , B 2014 , ' Lower foraging efficiency of offspring constrains use of optimal habitat in birds with extended parental care ' , Ibis , vol. 156 , no. 2 , pp. 387-394 . https://doi.org/10.1111/ibi.12137 NIOO article 2014 ftknawnlpublic https://doi.org/10.1111/ibi.1213720.500.11755/e0ab80c0-841f-4bef-96e2-ed62f1a3e7a1 2024-07-22T23:43:54Z Keywords: food intake rate; giving-up density; habitat switch; parental costs; social dominance After reproducing successfully, birds with extended parental care form family groups. Despite being the dominant social unit, such family groups have been reported to switch to alternative habitat earlier than adults without offspring, with potential negative carry-over effects for the next breeding season. Here we test a proposed mechanism for this earlier habitat switch, namely a low foraging efficiency in juveniles. Such a test is best performed under controlled conditions because in the field families may occupy food patches of a different quality than singles or pairs without young. We studied this mechanism in Bewick's Swans Cygnus columbianus bewickii, which trample (or ‘treadle’) for food buried in the sediment. The gross intake rate of juveniles was as low as 60% of that of adults, depending on the burial depth of the food. Trampling effort did not differ between age classes, but differences in intake rate were related to body size, suggesting that larger or heavier birds were trampling more efficiently. Corresponding giving-up densities in the field were calculated to be c. 60% higher for juveniles than for adults. Our findings are consistent with the hypothesis that the lower foraging efficiency of juveniles may be responsible for the segregation of family groups from adults without offspring. Keywords: food intake rate; giving-up density; habitat switch; parental costs; social dominance After reproducing successfully, birds with extended parental care form family groups. Despite being the dominant social unit, such family groups have been reported to switch to alternative habitat earlier than adults without offspring, with potential negative carry-over effects for the next breeding season. Here we test a proposed mechanism for this earlier habitat switch, namely a low foraging efficiency in juveniles. Such a test is best performed under controlled conditions because in the field families may occupy food ... Article in Journal/Newspaper Cygnus columbianus Royal Netherlands Academy of Arts and Sciences Research Portal (KNAW) Ibis 156 2 387 394 |
institution |
Open Polar |
collection |
Royal Netherlands Academy of Arts and Sciences Research Portal (KNAW) |
op_collection_id |
ftknawnlpublic |
language |
English |
topic |
NIOO |
spellingShingle |
NIOO Nolet, B.A. Gyimesi, A. van Lith, B. Lower foraging efficiency of offspring constrains use of optimal habitat in birds with extended parental care |
topic_facet |
NIOO |
description |
Keywords: food intake rate; giving-up density; habitat switch; parental costs; social dominance After reproducing successfully, birds with extended parental care form family groups. Despite being the dominant social unit, such family groups have been reported to switch to alternative habitat earlier than adults without offspring, with potential negative carry-over effects for the next breeding season. Here we test a proposed mechanism for this earlier habitat switch, namely a low foraging efficiency in juveniles. Such a test is best performed under controlled conditions because in the field families may occupy food patches of a different quality than singles or pairs without young. We studied this mechanism in Bewick's Swans Cygnus columbianus bewickii, which trample (or ‘treadle’) for food buried in the sediment. The gross intake rate of juveniles was as low as 60% of that of adults, depending on the burial depth of the food. Trampling effort did not differ between age classes, but differences in intake rate were related to body size, suggesting that larger or heavier birds were trampling more efficiently. Corresponding giving-up densities in the field were calculated to be c. 60% higher for juveniles than for adults. Our findings are consistent with the hypothesis that the lower foraging efficiency of juveniles may be responsible for the segregation of family groups from adults without offspring. Keywords: food intake rate; giving-up density; habitat switch; parental costs; social dominance After reproducing successfully, birds with extended parental care form family groups. Despite being the dominant social unit, such family groups have been reported to switch to alternative habitat earlier than adults without offspring, with potential negative carry-over effects for the next breeding season. Here we test a proposed mechanism for this earlier habitat switch, namely a low foraging efficiency in juveniles. Such a test is best performed under controlled conditions because in the field families may occupy food ... |
format |
Article in Journal/Newspaper |
author |
Nolet, B.A. Gyimesi, A. van Lith, B. |
author_facet |
Nolet, B.A. Gyimesi, A. van Lith, B. |
author_sort |
Nolet, B.A. |
title |
Lower foraging efficiency of offspring constrains use of optimal habitat in birds with extended parental care |
title_short |
Lower foraging efficiency of offspring constrains use of optimal habitat in birds with extended parental care |
title_full |
Lower foraging efficiency of offspring constrains use of optimal habitat in birds with extended parental care |
title_fullStr |
Lower foraging efficiency of offspring constrains use of optimal habitat in birds with extended parental care |
title_full_unstemmed |
Lower foraging efficiency of offspring constrains use of optimal habitat in birds with extended parental care |
title_sort |
lower foraging efficiency of offspring constrains use of optimal habitat in birds with extended parental care |
publishDate |
2014 |
url |
https://pure.knaw.nl/portal/en/publications/e0ab80c0-841f-4bef-96e2-ed62f1a3e7a1 https://doi.org/10.1111/ibi.12137 https://hdl.handle.net/20.500.11755/e0ab80c0-841f-4bef-96e2-ed62f1a3e7a1 http://onlinelibrary.wiley.com/journal/10.1111/(ISSN)1474-919X http://mda.vliz.be/mda/directlink.php?fid=VLIZ_00000354_1390570224 |
genre |
Cygnus columbianus |
genre_facet |
Cygnus columbianus |
op_source |
Nolet , B A , Gyimesi , A & van Lith , B 2014 , ' Lower foraging efficiency of offspring constrains use of optimal habitat in birds with extended parental care ' , Ibis , vol. 156 , no. 2 , pp. 387-394 . https://doi.org/10.1111/ibi.12137 |
op_relation |
https://pure.knaw.nl/portal/en/publications/e0ab80c0-841f-4bef-96e2-ed62f1a3e7a1 |
op_rights |
info:eu-repo/semantics/closedAccess |
op_doi |
https://doi.org/10.1111/ibi.1213720.500.11755/e0ab80c0-841f-4bef-96e2-ed62f1a3e7a1 |
container_title |
Ibis |
container_volume |
156 |
container_issue |
2 |
container_start_page |
387 |
op_container_end_page |
394 |
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1810440916654096384 |