Demographic consequences of early development and extreme climate events for alcids on Triangle Island, British Columbia
In long-lived species like seabirds, population growth rate is most sensitive to changes in adult survival, although juvenile survival and recruitment can also be important. The reproductive success of seabirds often varies greatly depending on climate-driven food availability, but less is known abo...
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ftsimonfu:oai:summit.sfu.ca:9472 2023-05-15T16:18:16+02:00 Demographic consequences of early development and extreme climate events for alcids on Triangle Island, British Columbia Morrison, Kyle W. 2009 http://summit.sfu.ca/item/9472 English eng http://summit.sfu.ca/item/9472 Thesis 2009 ftsimonfu 2022-04-07T18:36:34Z In long-lived species like seabirds, population growth rate is most sensitive to changes in adult survival, although juvenile survival and recruitment can also be important. The reproductive success of seabirds often varies greatly depending on climate-driven food availability, but less is known about juvenile and adult survival of seabirds. Females of the small-bodied, zooplanktivorous Cassin’s Auklet (Ptychoramphus aleuticus) had high mortality in extreme climate years. In contrast, adult survival of two larger-bodied, more piscivorous species, Rhinoceros Auklet (Cerorhinca monocerata) and Tufted Puffin (Fratercula cirrhata) showed no adult survival response. Furthermore, we demonstrate that even in two of the most successful years on record for Tufted Puffin reproduction, the juvenile survival of each cohort can differ greatly. Early development, reflected in fledging wing length and mass, impacted juvenile survival and the age at which individuals returned to their natal colony. Thesis fratercula Summit - SFU Research Repository (Simon Fraser University) Triangle Island ENVELOPE(-129.085,-129.085,69.694,69.694) |
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Open Polar |
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Summit - SFU Research Repository (Simon Fraser University) |
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ftsimonfu |
language |
English |
description |
In long-lived species like seabirds, population growth rate is most sensitive to changes in adult survival, although juvenile survival and recruitment can also be important. The reproductive success of seabirds often varies greatly depending on climate-driven food availability, but less is known about juvenile and adult survival of seabirds. Females of the small-bodied, zooplanktivorous Cassin’s Auklet (Ptychoramphus aleuticus) had high mortality in extreme climate years. In contrast, adult survival of two larger-bodied, more piscivorous species, Rhinoceros Auklet (Cerorhinca monocerata) and Tufted Puffin (Fratercula cirrhata) showed no adult survival response. Furthermore, we demonstrate that even in two of the most successful years on record for Tufted Puffin reproduction, the juvenile survival of each cohort can differ greatly. Early development, reflected in fledging wing length and mass, impacted juvenile survival and the age at which individuals returned to their natal colony. |
format |
Thesis |
author |
Morrison, Kyle W. |
spellingShingle |
Morrison, Kyle W. Demographic consequences of early development and extreme climate events for alcids on Triangle Island, British Columbia |
author_facet |
Morrison, Kyle W. |
author_sort |
Morrison, Kyle W. |
title |
Demographic consequences of early development and extreme climate events for alcids on Triangle Island, British Columbia |
title_short |
Demographic consequences of early development and extreme climate events for alcids on Triangle Island, British Columbia |
title_full |
Demographic consequences of early development and extreme climate events for alcids on Triangle Island, British Columbia |
title_fullStr |
Demographic consequences of early development and extreme climate events for alcids on Triangle Island, British Columbia |
title_full_unstemmed |
Demographic consequences of early development and extreme climate events for alcids on Triangle Island, British Columbia |
title_sort |
demographic consequences of early development and extreme climate events for alcids on triangle island, british columbia |
publishDate |
2009 |
url |
http://summit.sfu.ca/item/9472 |
long_lat |
ENVELOPE(-129.085,-129.085,69.694,69.694) |
geographic |
Triangle Island |
geographic_facet |
Triangle Island |
genre |
fratercula |
genre_facet |
fratercula |
op_relation |
http://summit.sfu.ca/item/9472 |
_version_ |
1766004433148182528 |