Estimating sex specific apparent survival and dispersal of Little Ringed Plovers (Charadrius dubius)
Sex differences in survival have consequences to population dynamics making information on sex specific survival important. In birds, females often have lower survival than males, and one of the main mechanisms is considered to be differential reproductive investment. We studied apparent adult survi...
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fttsvojs:oai:journal.fi:article/133878 2023-09-05T13:22:49+02:00 Estimating sex specific apparent survival and dispersal of Little Ringed Plovers (Charadrius dubius) Pakanen, Veli-Matti Lampila, Satu Arppe, Heikki Valkama, Jari 2015-12-31 application/pdf https://ornisfennica.journal.fi/article/view/133878 eng eng BirdLife Finland https://ornisfennica.journal.fi/article/view/133878/82437 https://ornisfennica.journal.fi/article/view/133878 Ornis Fennica; Vol 92 Nro 4 (2015); 172–186 Ornis Fennica; Vol. 92 No. 4 (2015); 172–186 0030-5685 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Peer-reviewed Article 2015 fttsvojs 2023-08-23T23:03:14Z Sex differences in survival have consequences to population dynamics making information on sex specific survival important. In birds, females often have lower survival than males, and one of the main mechanisms is considered to be differential reproductive investment. We studied apparent adult survival and local recruitment of a small monoga-mous shorebird, the Little Ringed Plover (Charadrius dubius), with 18 years of capture– recapture data collected from a population breeding in Southern Finland. We expected no sex differences in adult survival because parental care is shared and double-broods and excessive relaying are rare in this northern population. Because apparent survival is the product of true survival and site fidelity, we also estimated breeding and natal dispersal distances within the study area to examine bias in survival estimates caused by permanent emigration. We found higher apparent adult survival in males (0.660) than in females (0.609), but no sex differences in local recruitment (0.080). Breeding dispersal distances were longer in females than in males mainly due to lower breeding site fidelity of females (0.620) than that of males (0.808). Thus, the lower apparent survival of females likely resulted from permanent emigration. Interestingly, the philopatric portion of the population (from local recruitment analysis) had higher apparent adult survival than what was found from the analysis of all adults. These apparent survival estimates that are less likely to be biased by permanent emigration showed no sex differences (males 0.734; females 0.721), supporting our conclusion of no sex difference in true adult survival. Article in Journal/Newspaper Ringed Plover Federation of Finnish Learned Societies: Scientific Journals Online |
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Open Polar |
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Federation of Finnish Learned Societies: Scientific Journals Online |
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fttsvojs |
language |
English |
description |
Sex differences in survival have consequences to population dynamics making information on sex specific survival important. In birds, females often have lower survival than males, and one of the main mechanisms is considered to be differential reproductive investment. We studied apparent adult survival and local recruitment of a small monoga-mous shorebird, the Little Ringed Plover (Charadrius dubius), with 18 years of capture– recapture data collected from a population breeding in Southern Finland. We expected no sex differences in adult survival because parental care is shared and double-broods and excessive relaying are rare in this northern population. Because apparent survival is the product of true survival and site fidelity, we also estimated breeding and natal dispersal distances within the study area to examine bias in survival estimates caused by permanent emigration. We found higher apparent adult survival in males (0.660) than in females (0.609), but no sex differences in local recruitment (0.080). Breeding dispersal distances were longer in females than in males mainly due to lower breeding site fidelity of females (0.620) than that of males (0.808). Thus, the lower apparent survival of females likely resulted from permanent emigration. Interestingly, the philopatric portion of the population (from local recruitment analysis) had higher apparent adult survival than what was found from the analysis of all adults. These apparent survival estimates that are less likely to be biased by permanent emigration showed no sex differences (males 0.734; females 0.721), supporting our conclusion of no sex difference in true adult survival. |
format |
Article in Journal/Newspaper |
author |
Pakanen, Veli-Matti Lampila, Satu Arppe, Heikki Valkama, Jari |
spellingShingle |
Pakanen, Veli-Matti Lampila, Satu Arppe, Heikki Valkama, Jari Estimating sex specific apparent survival and dispersal of Little Ringed Plovers (Charadrius dubius) |
author_facet |
Pakanen, Veli-Matti Lampila, Satu Arppe, Heikki Valkama, Jari |
author_sort |
Pakanen, Veli-Matti |
title |
Estimating sex specific apparent survival and dispersal of Little Ringed Plovers (Charadrius dubius) |
title_short |
Estimating sex specific apparent survival and dispersal of Little Ringed Plovers (Charadrius dubius) |
title_full |
Estimating sex specific apparent survival and dispersal of Little Ringed Plovers (Charadrius dubius) |
title_fullStr |
Estimating sex specific apparent survival and dispersal of Little Ringed Plovers (Charadrius dubius) |
title_full_unstemmed |
Estimating sex specific apparent survival and dispersal of Little Ringed Plovers (Charadrius dubius) |
title_sort |
estimating sex specific apparent survival and dispersal of little ringed plovers (charadrius dubius) |
publisher |
BirdLife Finland |
publishDate |
2015 |
url |
https://ornisfennica.journal.fi/article/view/133878 |
genre |
Ringed Plover |
genre_facet |
Ringed Plover |
op_source |
Ornis Fennica; Vol 92 Nro 4 (2015); 172–186 Ornis Fennica; Vol. 92 No. 4 (2015); 172–186 0030-5685 |
op_relation |
https://ornisfennica.journal.fi/article/view/133878/82437 https://ornisfennica.journal.fi/article/view/133878 |
_version_ |
1776203361537753088 |