ON MULTIPLE BROODS AND THE BREEDING STRATEGY OF ARCTIC SANDERLINGS
Summary. Sanderlings on Bathurst Island in the Canadian arctic have two patterns of incubation. At some nests the eggs are covered soon after the fourth egg has been laid and at others incubation is delayed for 5–6 days. Because the delay is about the same time required to lay a second clutch and be...
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Online Access: | http://dx.doi.org/10.1111/j.1474-919x.1973.tb02638.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.1973.tb02638.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.1973.tb02638.x |
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crwiley:10.1111/j.1474-919x.1973.tb02638.x 2024-06-02T08:01:28+00:00 ON MULTIPLE BROODS AND THE BREEDING STRATEGY OF ARCTIC SANDERLINGS Parmelee, D. F. Payne, R. B. 1973 http://dx.doi.org/10.1111/j.1474-919x.1973.tb02638.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.1973.tb02638.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.1973.tb02638.x en eng Wiley http://onlinelibrary.wiley.com/termsAndConditions#vor Ibis volume 115, issue 2, page 218-226 ISSN 0019-1019 1474-919X journal-article 1973 crwiley https://doi.org/10.1111/j.1474-919x.1973.tb02638.x 2024-05-03T10:34:00Z Summary. Sanderlings on Bathurst Island in the Canadian arctic have two patterns of incubation. At some nests the eggs are covered soon after the fourth egg has been laid and at others incubation is delayed for 5–6 days. Because the delay is about the same time required to lay a second clutch and because a single individual alone incubates at any one nest, we suspected that Sanderlings might normally lay two clutches in a season, the male caring for one brood and the female for the other. Histological and gross examination of the ovaries of two females taken as the birds began incubation showed eight freshly ovulated follicles in each female. The size gradation and histological appearance of the follicles indicated that two clutches of four eggs each had been laid within 8–10 days by a single female. The ovary of one female had additional large yolky follicles, suggesting a physiological capability of further ovulations. Field conditions in the arctic summer are highly variable, and the small eggs and the rapid sequence of broods of Sanderlings may be breeding adaptations that permit them to multiply the traditional wader clutch of four eggs by 2 or 3 in favourable years. Selection for mating systems characterised by brief pair bonds and by polyandry is expected in precocial birds where some broods are incubated and cared for by the male, but further field work is required to determine the precise mating system of Sanderlings. Article in Journal/Newspaper Arctic Bathurst Island Wiley Online Library Arctic Bathurst Island ENVELOPE(-100.002,-100.002,75.752,75.752) Ibis 115 2 218 226 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Summary. Sanderlings on Bathurst Island in the Canadian arctic have two patterns of incubation. At some nests the eggs are covered soon after the fourth egg has been laid and at others incubation is delayed for 5–6 days. Because the delay is about the same time required to lay a second clutch and because a single individual alone incubates at any one nest, we suspected that Sanderlings might normally lay two clutches in a season, the male caring for one brood and the female for the other. Histological and gross examination of the ovaries of two females taken as the birds began incubation showed eight freshly ovulated follicles in each female. The size gradation and histological appearance of the follicles indicated that two clutches of four eggs each had been laid within 8–10 days by a single female. The ovary of one female had additional large yolky follicles, suggesting a physiological capability of further ovulations. Field conditions in the arctic summer are highly variable, and the small eggs and the rapid sequence of broods of Sanderlings may be breeding adaptations that permit them to multiply the traditional wader clutch of four eggs by 2 or 3 in favourable years. Selection for mating systems characterised by brief pair bonds and by polyandry is expected in precocial birds where some broods are incubated and cared for by the male, but further field work is required to determine the precise mating system of Sanderlings. |
format |
Article in Journal/Newspaper |
author |
Parmelee, D. F. Payne, R. B. |
spellingShingle |
Parmelee, D. F. Payne, R. B. ON MULTIPLE BROODS AND THE BREEDING STRATEGY OF ARCTIC SANDERLINGS |
author_facet |
Parmelee, D. F. Payne, R. B. |
author_sort |
Parmelee, D. F. |
title |
ON MULTIPLE BROODS AND THE BREEDING STRATEGY OF ARCTIC SANDERLINGS |
title_short |
ON MULTIPLE BROODS AND THE BREEDING STRATEGY OF ARCTIC SANDERLINGS |
title_full |
ON MULTIPLE BROODS AND THE BREEDING STRATEGY OF ARCTIC SANDERLINGS |
title_fullStr |
ON MULTIPLE BROODS AND THE BREEDING STRATEGY OF ARCTIC SANDERLINGS |
title_full_unstemmed |
ON MULTIPLE BROODS AND THE BREEDING STRATEGY OF ARCTIC SANDERLINGS |
title_sort |
on multiple broods and the breeding strategy of arctic sanderlings |
publisher |
Wiley |
publishDate |
1973 |
url |
http://dx.doi.org/10.1111/j.1474-919x.1973.tb02638.x https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1111%2Fj.1474-919X.1973.tb02638.x https://onlinelibrary.wiley.com/doi/pdf/10.1111/j.1474-919X.1973.tb02638.x |
long_lat |
ENVELOPE(-100.002,-100.002,75.752,75.752) |
geographic |
Arctic Bathurst Island |
geographic_facet |
Arctic Bathurst Island |
genre |
Arctic Bathurst Island |
genre_facet |
Arctic Bathurst Island |
op_source |
Ibis volume 115, issue 2, page 218-226 ISSN 0019-1019 1474-919X |
op_rights |
http://onlinelibrary.wiley.com/termsAndConditions#vor |
op_doi |
https://doi.org/10.1111/j.1474-919x.1973.tb02638.x |
container_title |
Ibis |
container_volume |
115 |
container_issue |
2 |
container_start_page |
218 |
op_container_end_page |
226 |
_version_ |
1800745836212125696 |