Components of population growth rate for White-winged Scoters in Saskatchewan, Canada
Breeding range and abundance of White-winged Scoters (Melanitta fusca deglandi) have declined in northwestern North America. Hypotheses proposed to account for this trend are that survival and/or recruitment of females had declined. Thus, we used a reverse-time capture-recapture approach to directly...
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Museu de Ciències Naturals de Barcelona
2004
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ftdoajarticles:oai:doaj.org/article:9f83bdc00254461098106f6842b2d72f 2023-05-15T17:10:55+02:00 Components of population growth rate for White-winged Scoters in Saskatchewan, Canada Alisauskas, R. T. Traylor, J. J. Swoboda, C. J. Kehoe, F. P. 2004-06-01T00:00:00Z https://doaj.org/article/9f83bdc00254461098106f6842b2d72f EN ES eng spa Museu de Ciències Naturals de Barcelona http://abc.museucienciesjournals.cat/files/ABC-27-1-pp-451-460.pdf https://doaj.org/toc/1578-665X 1578-665X https://doaj.org/article/9f83bdc00254461098106f6842b2d72f Animal Biodiversity and Conservation, Vol 27, Iss 1, Pp 451-460 (2004) Melanitta fusca deglandii Population growth Saskatchewan Survival Recruitment White-winged Scoter Zoology QL1-991 article 2004 ftdoajarticles 2022-12-31T01:40:34Z Breeding range and abundance of White-winged Scoters (Melanitta fusca deglandi) have declined in northwestern North America. Hypotheses proposed to account for this trend are that survival and/or recruitment of females had declined. Thus, we used a reverse-time capture-recapture approach to directly estimate survival, seniority and capture probabilities for females of breeding age at Redberry Lake, Saskatchewan, Canada for 1975-1980 and 2000-2003. We also estimated population size of breeding females for 1975-1985 and 2000-2003 using capture-recapture data. Initially, this local population was in serious decline [95%CL(landa75-80) = 0.89 ± 0.09], but has since stabilized and may be slowly increasing [95%CL(landa00-03)=1.07±0.11]. This reversal in trajectory apparently resulted from increased recruitment rather than increased apparent survival. Importantly, recent recruitment of adult females appeared to be driven solely by immigration of adult females with no detectable in situ recruitment, suggesting a hypothesis that the local population is being rescued by females produced elsewhere. Article in Journal/Newspaper Melanitta fusca Directory of Open Access Journals: DOAJ Articles Canada |
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Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
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language |
English Spanish |
topic |
Melanitta fusca deglandii Population growth Saskatchewan Survival Recruitment White-winged Scoter Zoology QL1-991 |
spellingShingle |
Melanitta fusca deglandii Population growth Saskatchewan Survival Recruitment White-winged Scoter Zoology QL1-991 Alisauskas, R. T. Traylor, J. J. Swoboda, C. J. Kehoe, F. P. Components of population growth rate for White-winged Scoters in Saskatchewan, Canada |
topic_facet |
Melanitta fusca deglandii Population growth Saskatchewan Survival Recruitment White-winged Scoter Zoology QL1-991 |
description |
Breeding range and abundance of White-winged Scoters (Melanitta fusca deglandi) have declined in northwestern North America. Hypotheses proposed to account for this trend are that survival and/or recruitment of females had declined. Thus, we used a reverse-time capture-recapture approach to directly estimate survival, seniority and capture probabilities for females of breeding age at Redberry Lake, Saskatchewan, Canada for 1975-1980 and 2000-2003. We also estimated population size of breeding females for 1975-1985 and 2000-2003 using capture-recapture data. Initially, this local population was in serious decline [95%CL(landa75-80) = 0.89 ± 0.09], but has since stabilized and may be slowly increasing [95%CL(landa00-03)=1.07±0.11]. This reversal in trajectory apparently resulted from increased recruitment rather than increased apparent survival. Importantly, recent recruitment of adult females appeared to be driven solely by immigration of adult females with no detectable in situ recruitment, suggesting a hypothesis that the local population is being rescued by females produced elsewhere. |
format |
Article in Journal/Newspaper |
author |
Alisauskas, R. T. Traylor, J. J. Swoboda, C. J. Kehoe, F. P. |
author_facet |
Alisauskas, R. T. Traylor, J. J. Swoboda, C. J. Kehoe, F. P. |
author_sort |
Alisauskas, R. T. |
title |
Components of population growth rate for White-winged Scoters in Saskatchewan, Canada |
title_short |
Components of population growth rate for White-winged Scoters in Saskatchewan, Canada |
title_full |
Components of population growth rate for White-winged Scoters in Saskatchewan, Canada |
title_fullStr |
Components of population growth rate for White-winged Scoters in Saskatchewan, Canada |
title_full_unstemmed |
Components of population growth rate for White-winged Scoters in Saskatchewan, Canada |
title_sort |
components of population growth rate for white-winged scoters in saskatchewan, canada |
publisher |
Museu de Ciències Naturals de Barcelona |
publishDate |
2004 |
url |
https://doaj.org/article/9f83bdc00254461098106f6842b2d72f |
geographic |
Canada |
geographic_facet |
Canada |
genre |
Melanitta fusca |
genre_facet |
Melanitta fusca |
op_source |
Animal Biodiversity and Conservation, Vol 27, Iss 1, Pp 451-460 (2004) |
op_relation |
http://abc.museucienciesjournals.cat/files/ABC-27-1-pp-451-460.pdf https://doaj.org/toc/1578-665X 1578-665X https://doaj.org/article/9f83bdc00254461098106f6842b2d72f |
_version_ |
1766067571145048064 |