Sex-biased parental-care allocation in three tern species (Laridae, Aves)
We studied parental-care allocation by males and females in three tern species. Female Common Terns (Sterna hirundo) and Little Terns (S. albifrons) performed more incubation and brooding than males, whereas in the Sandwich Tern (S. sandvicensis) the sexes shared these duties equally. In all three s...
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Canadian Science Publishing
1995
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Online Access: | http://dx.doi.org/10.1139/z95-172 http://www.nrcresearchpress.com/doi/pdf/10.1139/z95-172 |
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crcansciencepubl:10.1139/z95-172 2024-09-15T18:37:44+00:00 Sex-biased parental-care allocation in three tern species (Laridae, Aves) Fasola, Mauro Saino, Nicola 1995 http://dx.doi.org/10.1139/z95-172 http://www.nrcresearchpress.com/doi/pdf/10.1139/z95-172 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 73, issue 8, page 1461-1467 ISSN 0008-4301 1480-3283 journal-article 1995 crcansciencepubl https://doi.org/10.1139/z95-172 2024-07-25T04:10:06Z We studied parental-care allocation by males and females in three tern species. Female Common Terns (Sterna hirundo) and Little Terns (S. albifrons) performed more incubation and brooding than males, whereas in the Sandwich Tern (S. sandvicensis) the sexes shared these duties equally. In all three species, agonistic behaviors were performed equally by females and males. Prey types brought by males and females of each species were similar, but males tended to bring larger prey and had higher delivery rates than females. Information on parental-care allocation by female and male seabirds of various species, 5 gulls, 6 terns, and 1 skimmer, indicates that females perform most of the incubation and brooding in both gulls and terns, whereas males perform most territory attendance and agonistic behavior (gulls) and more prey provisioning (terns). These patterns are qualitatively consistent with the explanation that the differences between gulls and terns in sex-biased parental care are related to the fact that gulls exhibit sexual size dimorphism but terns do not. Contrary to theoretical predictions that in monogamous birds, females contribute more reproductive effort than males, in all the seabird species studied so far the total parental expenditure by males seems to equal or outweigh that by females. Article in Journal/Newspaper Sterna hirundo Canadian Science Publishing Canadian Journal of Zoology 73 8 1461 1467 |
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Open Polar |
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Canadian Science Publishing |
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crcansciencepubl |
language |
English |
description |
We studied parental-care allocation by males and females in three tern species. Female Common Terns (Sterna hirundo) and Little Terns (S. albifrons) performed more incubation and brooding than males, whereas in the Sandwich Tern (S. sandvicensis) the sexes shared these duties equally. In all three species, agonistic behaviors were performed equally by females and males. Prey types brought by males and females of each species were similar, but males tended to bring larger prey and had higher delivery rates than females. Information on parental-care allocation by female and male seabirds of various species, 5 gulls, 6 terns, and 1 skimmer, indicates that females perform most of the incubation and brooding in both gulls and terns, whereas males perform most territory attendance and agonistic behavior (gulls) and more prey provisioning (terns). These patterns are qualitatively consistent with the explanation that the differences between gulls and terns in sex-biased parental care are related to the fact that gulls exhibit sexual size dimorphism but terns do not. Contrary to theoretical predictions that in monogamous birds, females contribute more reproductive effort than males, in all the seabird species studied so far the total parental expenditure by males seems to equal or outweigh that by females. |
format |
Article in Journal/Newspaper |
author |
Fasola, Mauro Saino, Nicola |
spellingShingle |
Fasola, Mauro Saino, Nicola Sex-biased parental-care allocation in three tern species (Laridae, Aves) |
author_facet |
Fasola, Mauro Saino, Nicola |
author_sort |
Fasola, Mauro |
title |
Sex-biased parental-care allocation in three tern species (Laridae, Aves) |
title_short |
Sex-biased parental-care allocation in three tern species (Laridae, Aves) |
title_full |
Sex-biased parental-care allocation in three tern species (Laridae, Aves) |
title_fullStr |
Sex-biased parental-care allocation in three tern species (Laridae, Aves) |
title_full_unstemmed |
Sex-biased parental-care allocation in three tern species (Laridae, Aves) |
title_sort |
sex-biased parental-care allocation in three tern species (laridae, aves) |
publisher |
Canadian Science Publishing |
publishDate |
1995 |
url |
http://dx.doi.org/10.1139/z95-172 http://www.nrcresearchpress.com/doi/pdf/10.1139/z95-172 |
genre |
Sterna hirundo |
genre_facet |
Sterna hirundo |
op_source |
Canadian Journal of Zoology volume 73, issue 8, page 1461-1467 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/z95-172 |
container_title |
Canadian Journal of Zoology |
container_volume |
73 |
container_issue |
8 |
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1461 |
op_container_end_page |
1467 |
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1810482092562186240 |