Do intraspecific life history patterns follow interspecific predictions? A test using latitudinal variation in ringed seals
Mammals adapted to unpredictable and low-energy environments often evolve a “bet-hedging” life history strategy characterized by less costly reproductive outputs over a longer and slower-growing life. In contrast, species adapted to more predictable (i.e., low variation) and higher energy environmen...
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Online Access: | https://scholar.uwindsor.ca/glierpub/300 https://doi.org/10.1002/1438-390X.12008 |
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ftunivwindsor:oai:scholar.uwindsor.ca:glierpub-1302 2023-06-11T04:09:43+02:00 Do intraspecific life history patterns follow interspecific predictions? A test using latitudinal variation in ringed seals Ferguson, Steven H. Yurkowski, David J. Young, Brent G. Willing, Cornelia Zhu, Xinhua Muir, Derek C.G. Fisk, Aaron T. Thiemann, Gregory W. 2019-10-01T07:00:00Z https://scholar.uwindsor.ca/glierpub/300 https://doi.org/10.1002/1438-390X.12008 unknown Scholarship at UWindsor https://scholar.uwindsor.ca/glierpub/300 doi:10.1002/1438-390X.12008 https://doi.org/10.1002/1438-390X.12008 Great Lakes Institute for Environmental Research Publications age of maturity body size environmental predictability latitude mating system text 2019 ftunivwindsor https://doi.org/10.1002/1438-390X.12008 2023-05-06T19:10:44Z Mammals adapted to unpredictable and low-energy environments often evolve a “bet-hedging” life history strategy characterized by less costly reproductive outputs over a longer and slower-growing life. In contrast, species adapted to more predictable (i.e., low variation) and higher energy environments may evolve greater fecundity over a shorter and faster-growing life. We tested whether this known interspecific pattern also occurs within a species. We compared life history traits of the ringed seal (Pusa hispida) in the Canadian High Arctic to those closer to the southern limit of the species' circumpolar distribution. We found that northern seals grew slower than southern seals (Brody growth coefficient), achieved a greater asymptotic body weight (82 and 69 kg vs. 74 and 54 kg female and male, respectively), reached sexual maturity later (6.1 years vs. 4.5 years), had lower fecundity (1.8 years vs. 1.3 years interbirth interval), longer average lifespan (5 years vs. 3 years median age), and greater movements (1,269 vs. 681 km). Mating systems also likely differed with northern seals showing morphological evidence of a promiscuous mating system with potential sperm competition as indicated by greater relative testes size. The northern region was also characterized by more unpredictable environmental timing of seasonal events, such as spring sea ice breakup. Life history variation between the intraspecific groups of seals appears to agree with interspecific patterns and provides a better understanding of how species' life history parameters shift in concert with environmental conditions. Text Arctic Pusa hispida ringed seal Sea ice University of Windsor, Ontario: Scholarship at UWindsor Arctic Population Ecology 61 4 371 382 |
institution |
Open Polar |
collection |
University of Windsor, Ontario: Scholarship at UWindsor |
op_collection_id |
ftunivwindsor |
language |
unknown |
topic |
age of maturity body size environmental predictability latitude mating system |
spellingShingle |
age of maturity body size environmental predictability latitude mating system Ferguson, Steven H. Yurkowski, David J. Young, Brent G. Willing, Cornelia Zhu, Xinhua Muir, Derek C.G. Fisk, Aaron T. Thiemann, Gregory W. Do intraspecific life history patterns follow interspecific predictions? A test using latitudinal variation in ringed seals |
topic_facet |
age of maturity body size environmental predictability latitude mating system |
description |
Mammals adapted to unpredictable and low-energy environments often evolve a “bet-hedging” life history strategy characterized by less costly reproductive outputs over a longer and slower-growing life. In contrast, species adapted to more predictable (i.e., low variation) and higher energy environments may evolve greater fecundity over a shorter and faster-growing life. We tested whether this known interspecific pattern also occurs within a species. We compared life history traits of the ringed seal (Pusa hispida) in the Canadian High Arctic to those closer to the southern limit of the species' circumpolar distribution. We found that northern seals grew slower than southern seals (Brody growth coefficient), achieved a greater asymptotic body weight (82 and 69 kg vs. 74 and 54 kg female and male, respectively), reached sexual maturity later (6.1 years vs. 4.5 years), had lower fecundity (1.8 years vs. 1.3 years interbirth interval), longer average lifespan (5 years vs. 3 years median age), and greater movements (1,269 vs. 681 km). Mating systems also likely differed with northern seals showing morphological evidence of a promiscuous mating system with potential sperm competition as indicated by greater relative testes size. The northern region was also characterized by more unpredictable environmental timing of seasonal events, such as spring sea ice breakup. Life history variation between the intraspecific groups of seals appears to agree with interspecific patterns and provides a better understanding of how species' life history parameters shift in concert with environmental conditions. |
format |
Text |
author |
Ferguson, Steven H. Yurkowski, David J. Young, Brent G. Willing, Cornelia Zhu, Xinhua Muir, Derek C.G. Fisk, Aaron T. Thiemann, Gregory W. |
author_facet |
Ferguson, Steven H. Yurkowski, David J. Young, Brent G. Willing, Cornelia Zhu, Xinhua Muir, Derek C.G. Fisk, Aaron T. Thiemann, Gregory W. |
author_sort |
Ferguson, Steven H. |
title |
Do intraspecific life history patterns follow interspecific predictions? A test using latitudinal variation in ringed seals |
title_short |
Do intraspecific life history patterns follow interspecific predictions? A test using latitudinal variation in ringed seals |
title_full |
Do intraspecific life history patterns follow interspecific predictions? A test using latitudinal variation in ringed seals |
title_fullStr |
Do intraspecific life history patterns follow interspecific predictions? A test using latitudinal variation in ringed seals |
title_full_unstemmed |
Do intraspecific life history patterns follow interspecific predictions? A test using latitudinal variation in ringed seals |
title_sort |
do intraspecific life history patterns follow interspecific predictions? a test using latitudinal variation in ringed seals |
publisher |
Scholarship at UWindsor |
publishDate |
2019 |
url |
https://scholar.uwindsor.ca/glierpub/300 https://doi.org/10.1002/1438-390X.12008 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Arctic Pusa hispida ringed seal Sea ice |
genre_facet |
Arctic Pusa hispida ringed seal Sea ice |
op_source |
Great Lakes Institute for Environmental Research Publications |
op_relation |
https://scholar.uwindsor.ca/glierpub/300 doi:10.1002/1438-390X.12008 https://doi.org/10.1002/1438-390X.12008 |
op_doi |
https://doi.org/10.1002/1438-390X.12008 |
container_title |
Population Ecology |
container_volume |
61 |
container_issue |
4 |
container_start_page |
371 |
op_container_end_page |
382 |
_version_ |
1768383699160662016 |