Population stability in salmon species: effects of population size and female reproductive allocation.
Summary 1. Population stability (i.e. level of temporal variation in population abundance) is linked commonly to levels of environmental disturbances. However, populations may also differ in their propensity to dampen or amplify the effects of exogenous forces. Here time-series of population estimat...
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ftciteseerx:oai:CiteSeerX.psu:10.1.1.1062.2059 2023-05-15T17:59:38+02:00 Population stability in salmon species: effects of population size and female reproductive allocation. Sigurd Einum Ian A Fleming Isabelle M Côté John D Reynolds The Pennsylvania State University CiteSeerX Archives 2003 application/pdf http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1062.2059 http://johnreynolds.org/wp-content/uploads/2012/07/einum-et-al-j-anim-ecol-03.pdf en eng http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1062.2059 http://johnreynolds.org/wp-content/uploads/2012/07/einum-et-al-j-anim-ecol-03.pdf Metadata may be used without restrictions as long as the oai identifier remains attached to it. http://johnreynolds.org/wp-content/uploads/2012/07/einum-et-al-j-anim-ecol-03.pdf text 2003 ftciteseerx 2020-04-19T00:21:35Z Summary 1. Population stability (i.e. level of temporal variation in population abundance) is linked commonly to levels of environmental disturbances. However, populations may also differ in their propensity to dampen or amplify the effects of exogenous forces. Here time-series of population estimates were used to test for such differences among 104 populations of six salmon species. 2. At the species level, Atlantic ( Salmo salar L.), chinook ( Oncorhynchus tshawytscha Walbaum) and coho salmon ( O. kisutch W) were less variable than sockeye ( O. nerka W) and pink salmon ( O. gorbuscha W). Chum salmon ( O. keta W) was more similar to sockeye and pink salmon. These differences may be related in part to differences in body size, and hence susceptibility to adverse environmental conditions, at the time when they migrate to the sea or lakes. 3. At the population level no effect of fecundity on variability was found, in contrast to findings for marine fishes, nor of egg size. Whereas substantial differences in the temporal stability of environmental factors among geographically close populations may override any effects of fecundity or egg size in fresh water, this is less likely in the marine environment where spatial autocorrelations of environmental variability are more pronounced. 4. Variation in population sizes was related positively to the duration of time-series when using standard deviations of ln-transformed population estimates, and also when using linearly detrended population variation, suggesting non-linear long-term abundance trends in salmon populations that extend beyond the 7-year period of the shortest time-series. 5. When controlling for differences among species, stability increased with increasing population size, and it is hypothesized that this is due to large populations having a more complex spatial and genetic structure than small populations due to wider spatial distribution. The effects of population size on stability, as well as differences in stability among species, suggest that ... Text Pink salmon Salmo salar Unknown Keta ENVELOPE(-19.455,-19.455,65.656,65.656) Sockeye ENVELOPE(-130.143,-130.143,54.160,54.160) |
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Open Polar |
collection |
Unknown |
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ftciteseerx |
language |
English |
description |
Summary 1. Population stability (i.e. level of temporal variation in population abundance) is linked commonly to levels of environmental disturbances. However, populations may also differ in their propensity to dampen or amplify the effects of exogenous forces. Here time-series of population estimates were used to test for such differences among 104 populations of six salmon species. 2. At the species level, Atlantic ( Salmo salar L.), chinook ( Oncorhynchus tshawytscha Walbaum) and coho salmon ( O. kisutch W) were less variable than sockeye ( O. nerka W) and pink salmon ( O. gorbuscha W). Chum salmon ( O. keta W) was more similar to sockeye and pink salmon. These differences may be related in part to differences in body size, and hence susceptibility to adverse environmental conditions, at the time when they migrate to the sea or lakes. 3. At the population level no effect of fecundity on variability was found, in contrast to findings for marine fishes, nor of egg size. Whereas substantial differences in the temporal stability of environmental factors among geographically close populations may override any effects of fecundity or egg size in fresh water, this is less likely in the marine environment where spatial autocorrelations of environmental variability are more pronounced. 4. Variation in population sizes was related positively to the duration of time-series when using standard deviations of ln-transformed population estimates, and also when using linearly detrended population variation, suggesting non-linear long-term abundance trends in salmon populations that extend beyond the 7-year period of the shortest time-series. 5. When controlling for differences among species, stability increased with increasing population size, and it is hypothesized that this is due to large populations having a more complex spatial and genetic structure than small populations due to wider spatial distribution. The effects of population size on stability, as well as differences in stability among species, suggest that ... |
author2 |
The Pennsylvania State University CiteSeerX Archives |
format |
Text |
author |
Sigurd Einum Ian A Fleming Isabelle M Côté John D Reynolds |
spellingShingle |
Sigurd Einum Ian A Fleming Isabelle M Côté John D Reynolds Population stability in salmon species: effects of population size and female reproductive allocation. |
author_facet |
Sigurd Einum Ian A Fleming Isabelle M Côté John D Reynolds |
author_sort |
Sigurd Einum |
title |
Population stability in salmon species: effects of population size and female reproductive allocation. |
title_short |
Population stability in salmon species: effects of population size and female reproductive allocation. |
title_full |
Population stability in salmon species: effects of population size and female reproductive allocation. |
title_fullStr |
Population stability in salmon species: effects of population size and female reproductive allocation. |
title_full_unstemmed |
Population stability in salmon species: effects of population size and female reproductive allocation. |
title_sort |
population stability in salmon species: effects of population size and female reproductive allocation. |
publishDate |
2003 |
url |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1062.2059 http://johnreynolds.org/wp-content/uploads/2012/07/einum-et-al-j-anim-ecol-03.pdf |
long_lat |
ENVELOPE(-19.455,-19.455,65.656,65.656) ENVELOPE(-130.143,-130.143,54.160,54.160) |
geographic |
Keta Sockeye |
geographic_facet |
Keta Sockeye |
genre |
Pink salmon Salmo salar |
genre_facet |
Pink salmon Salmo salar |
op_source |
http://johnreynolds.org/wp-content/uploads/2012/07/einum-et-al-j-anim-ecol-03.pdf |
op_relation |
http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.1062.2059 http://johnreynolds.org/wp-content/uploads/2012/07/einum-et-al-j-anim-ecol-03.pdf |
op_rights |
Metadata may be used without restrictions as long as the oai identifier remains attached to it. |
_version_ |
1766168489583706112 |