Influence of dams on population persistence in Atlantic salmon ( Salmo salar)
Barriers to migration can negatively affect population persistence. To explore how dams can influence the viability of a diadromous fish, we developed an empirically based stochastic model to estimate per-capita population growth rate (r) and probability of population decline (Pr(r < 0)). Our sim...
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crcansciencepubl:10.1139/cjz-2015-0195 2024-06-23T07:51:15+00:00 Influence of dams on population persistence in Atlantic salmon ( Salmo salar) Lawrence, Elizabeth R. Kuparinen, Anna Hutchings, Jeffrey A. 2016 http://dx.doi.org/10.1139/cjz-2015-0195 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjz-2015-0195 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjz-2015-0195 en eng Canadian Science Publishing http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining Canadian Journal of Zoology volume 94, issue 5, page 329-338 ISSN 0008-4301 1480-3283 journal-article 2016 crcansciencepubl https://doi.org/10.1139/cjz-2015-0195 2024-06-13T04:10:51Z Barriers to migration can negatively affect population persistence. To explore how dams can influence the viability of a diadromous fish, we developed an empirically based stochastic model to estimate per-capita population growth rate (r) and probability of population decline (Pr(r < 0)). Our simulations incorporated life-history parameters common for many populations of Atlantic salmon (Salmo salar L., 1758), particularly in the southern part of the species range. Additionally, we explored the influence of individuals that reproduce more than once, i.e., “kelts”, on r and Pr(r < 0). For the life-history scenarios examined here, dams are forecast to negatively affect persistence, even at the comparatively high per-dam smolt survival rate of 90%. As the number of dams increases from one to four, the probability of negative population growth increases four-fold from 10% to 47%. Kelt survival rate, number of dams, and smolt dam-passage survival were all found to be significant factors in predicting population persistence. The present study suggests two primary conclusions: (1) dams are likely to have a negative influence on Atlantic salmon and (2) kelts can have considerable and positive influence on population viability. Our work provides compelling support for the hypothesis that mortality attributable to dam facilities can adversely affect survival, persistence, and recovery of depleted migratory fish populations. Article in Journal/Newspaper Atlantic salmon Salmo salar Canadian Science Publishing Canadian Journal of Zoology 94 5 329 338 |
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Canadian Science Publishing |
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crcansciencepubl |
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English |
description |
Barriers to migration can negatively affect population persistence. To explore how dams can influence the viability of a diadromous fish, we developed an empirically based stochastic model to estimate per-capita population growth rate (r) and probability of population decline (Pr(r < 0)). Our simulations incorporated life-history parameters common for many populations of Atlantic salmon (Salmo salar L., 1758), particularly in the southern part of the species range. Additionally, we explored the influence of individuals that reproduce more than once, i.e., “kelts”, on r and Pr(r < 0). For the life-history scenarios examined here, dams are forecast to negatively affect persistence, even at the comparatively high per-dam smolt survival rate of 90%. As the number of dams increases from one to four, the probability of negative population growth increases four-fold from 10% to 47%. Kelt survival rate, number of dams, and smolt dam-passage survival were all found to be significant factors in predicting population persistence. The present study suggests two primary conclusions: (1) dams are likely to have a negative influence on Atlantic salmon and (2) kelts can have considerable and positive influence on population viability. Our work provides compelling support for the hypothesis that mortality attributable to dam facilities can adversely affect survival, persistence, and recovery of depleted migratory fish populations. |
format |
Article in Journal/Newspaper |
author |
Lawrence, Elizabeth R. Kuparinen, Anna Hutchings, Jeffrey A. |
spellingShingle |
Lawrence, Elizabeth R. Kuparinen, Anna Hutchings, Jeffrey A. Influence of dams on population persistence in Atlantic salmon ( Salmo salar) |
author_facet |
Lawrence, Elizabeth R. Kuparinen, Anna Hutchings, Jeffrey A. |
author_sort |
Lawrence, Elizabeth R. |
title |
Influence of dams on population persistence in Atlantic salmon ( Salmo salar) |
title_short |
Influence of dams on population persistence in Atlantic salmon ( Salmo salar) |
title_full |
Influence of dams on population persistence in Atlantic salmon ( Salmo salar) |
title_fullStr |
Influence of dams on population persistence in Atlantic salmon ( Salmo salar) |
title_full_unstemmed |
Influence of dams on population persistence in Atlantic salmon ( Salmo salar) |
title_sort |
influence of dams on population persistence in atlantic salmon ( salmo salar) |
publisher |
Canadian Science Publishing |
publishDate |
2016 |
url |
http://dx.doi.org/10.1139/cjz-2015-0195 http://www.nrcresearchpress.com/doi/full-xml/10.1139/cjz-2015-0195 http://www.nrcresearchpress.com/doi/pdf/10.1139/cjz-2015-0195 |
genre |
Atlantic salmon Salmo salar |
genre_facet |
Atlantic salmon Salmo salar |
op_source |
Canadian Journal of Zoology volume 94, issue 5, page 329-338 ISSN 0008-4301 1480-3283 |
op_rights |
http://www.nrcresearchpress.com/page/about/CorporateTextAndDataMining |
op_doi |
https://doi.org/10.1139/cjz-2015-0195 |
container_title |
Canadian Journal of Zoology |
container_volume |
94 |
container_issue |
5 |
container_start_page |
329 |
op_container_end_page |
338 |
_version_ |
1802642272425082880 |