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Maternal and offspring effects on the timing of parturition in western Steller sea lions (Eumetopias jubatus)
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| Zeitschriftentitel: | Canadian Journal of Zoology |
|---|---|
| Personen und Körperschaften: | , |
| In: | Canadian Journal of Zoology, 96, 2018, 4, S. 333-339 |
| Format: | E-Article |
| Sprache: | Englisch |
| veröffentlicht: |
Canadian Science Publishing
|
| Schlagwörter: |
| author_facet |
Maniscalco, John M. Parker, Pamela Maniscalco, John M. Parker, Pamela |
|---|---|
| author |
Maniscalco, John M. Parker, Pamela |
| spellingShingle |
Maniscalco, John M. Parker, Pamela Canadian Journal of Zoology Maternal and offspring effects on the timing of parturition in western Steller sea lions (Eumetopias jubatus) Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
| author_sort |
maniscalco, john m. |
| spelling |
Maniscalco, John M. Parker, Pamela 0008-4301 1480-3283 Canadian Science Publishing Animal Science and Zoology Ecology, Evolution, Behavior and Systematics http://dx.doi.org/10.1139/cjz-2017-0058 <jats:p> Identifying factors that affect the timing of parturition among annual breeders is important to aid our understanding of how variations may adversely affect population trends over both short and long temporal scales. We investigated the effect of several parameters on the timing of parturition among individual Steller sea lions (Eumetopias jubatus (Schreber, 1776)) over 6 years between 2005 and 2016 using an information–theoretic approach. In addition to the random effect of year, birth and care of a pup in the previous year had the largest effect on parturition, causing a 2.4 day delay. Maternal age was negatively correlated with timing of parturition and male pups were born nearly a day earlier than female pups, on average. There was limited support for effects of sex and mass, with heavier pups born marginally earlier than lighter ones. This study illustrates some of the complexity of variables that can influence the timing of birth in this species and which should be considered in models that attempt to identify long-term trends in changing marine ecosystems. </jats:p> Maternal and offspring effects on the timing of parturition in western Steller sea lions (<i>Eumetopias</i> <i>jubatus</i>) Canadian Journal of Zoology |
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Maternal and offspring effects on the timing of parturition in western Steller sea lions (Eumetopias jubatus) |
| title_unstemmed |
Maternal and offspring effects on the timing of parturition in western Steller sea lions (Eumetopias jubatus) |
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Maternal and offspring effects on the timing of parturition in western Steller sea lions (Eumetopias jubatus) |
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Maternal and offspring effects on the timing of parturition in western Steller sea lions (Eumetopias jubatus) |
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Maternal and offspring effects on the timing of parturition in western Steller sea lions (Eumetopias jubatus) |
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Maternal and offspring effects on the timing of parturition in western Steller sea lions (Eumetopias jubatus) |
| title_sort |
maternal and offspring effects on the timing of parturition in western steller sea lions (<i>eumetopias</i> <i>jubatus</i>) |
| topic |
Animal Science and Zoology Ecology, Evolution, Behavior and Systematics |
| url |
http://dx.doi.org/10.1139/cjz-2017-0058 |
| publishDate |
2018 |
| physical |
333-339 |
| description |
<jats:p> Identifying factors that affect the timing of parturition among annual breeders is important to aid our understanding of how variations may adversely affect population trends over both short and long temporal scales. We investigated the effect of several parameters on the timing of parturition among individual Steller sea lions (Eumetopias jubatus (Schreber, 1776)) over 6 years between 2005 and 2016 using an information–theoretic approach. In addition to the random effect of year, birth and care of a pup in the previous year had the largest effect on parturition, causing a 2.4 day delay. Maternal age was negatively correlated with timing of parturition and male pups were born nearly a day earlier than female pups, on average. There was limited support for effects of sex and mass, with heavier pups born marginally earlier than lighter ones. This study illustrates some of the complexity of variables that can influence the timing of birth in this species and which should be considered in models that attempt to identify long-term trends in changing marine ecosystems. </jats:p> |
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| description | <jats:p> Identifying factors that affect the timing of parturition among annual breeders is important to aid our understanding of how variations may adversely affect population trends over both short and long temporal scales. We investigated the effect of several parameters on the timing of parturition among individual Steller sea lions (Eumetopias jubatus (Schreber, 1776)) over 6 years between 2005 and 2016 using an information–theoretic approach. In addition to the random effect of year, birth and care of a pup in the previous year had the largest effect on parturition, causing a 2.4 day delay. Maternal age was negatively correlated with timing of parturition and male pups were born nearly a day earlier than female pups, on average. There was limited support for effects of sex and mass, with heavier pups born marginally earlier than lighter ones. This study illustrates some of the complexity of variables that can influence the timing of birth in this species and which should be considered in models that attempt to identify long-term trends in changing marine ecosystems. </jats:p> |
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| spelling | Maniscalco, John M. Parker, Pamela 0008-4301 1480-3283 Canadian Science Publishing Animal Science and Zoology Ecology, Evolution, Behavior and Systematics http://dx.doi.org/10.1139/cjz-2017-0058 <jats:p> Identifying factors that affect the timing of parturition among annual breeders is important to aid our understanding of how variations may adversely affect population trends over both short and long temporal scales. We investigated the effect of several parameters on the timing of parturition among individual Steller sea lions (Eumetopias jubatus (Schreber, 1776)) over 6 years between 2005 and 2016 using an information–theoretic approach. In addition to the random effect of year, birth and care of a pup in the previous year had the largest effect on parturition, causing a 2.4 day delay. Maternal age was negatively correlated with timing of parturition and male pups were born nearly a day earlier than female pups, on average. There was limited support for effects of sex and mass, with heavier pups born marginally earlier than lighter ones. This study illustrates some of the complexity of variables that can influence the timing of birth in this species and which should be considered in models that attempt to identify long-term trends in changing marine ecosystems. </jats:p> Maternal and offspring effects on the timing of parturition in western Steller sea lions (<i>Eumetopias</i> <i>jubatus</i>) Canadian Journal of Zoology |
| spellingShingle | Maniscalco, John M., Parker, Pamela, Canadian Journal of Zoology, Maternal and offspring effects on the timing of parturition in western Steller sea lions (Eumetopias jubatus), Animal Science and Zoology, Ecology, Evolution, Behavior and Systematics |
| title | Maternal and offspring effects on the timing of parturition in western Steller sea lions (Eumetopias jubatus) |
| title_full | Maternal and offspring effects on the timing of parturition in western Steller sea lions (Eumetopias jubatus) |
| title_fullStr | Maternal and offspring effects on the timing of parturition in western Steller sea lions (Eumetopias jubatus) |
| title_full_unstemmed | Maternal and offspring effects on the timing of parturition in western Steller sea lions (Eumetopias jubatus) |
| title_short | Maternal and offspring effects on the timing of parturition in western Steller sea lions (Eumetopias jubatus) |
| title_sort | maternal and offspring effects on the timing of parturition in western steller sea lions (<i>eumetopias</i> <i>jubatus</i>) |
| title_unstemmed | Maternal and offspring effects on the timing of parturition in western Steller sea lions (Eumetopias jubatus) |
| topic | Animal Science and Zoology, Ecology, Evolution, Behavior and Systematics |
| url | http://dx.doi.org/10.1139/cjz-2017-0058 |