onr:"swepub:oai:DiVA.org:uu-152130"
Search: onr:"swepub:oai:DiVA.org:uu-152130" > Growth under uncert...
- 1 of 1
- Previous record
- Next record
- To hitlist
Growth under uncertainty : The influence of marine variability on early development of Galapagos sea lions
- Mueller, Birte (author)
- Pörschmann, Ulrich (author)
-
- Wolf, Jochen B. W. (author)
- Uppsala universitet,Evolutionsbiologi
- show more...
- Trillmich, Fritz (author)
- show less...
- (creator_code:org_t)
- 2010-07-15
- 2011
- English.
- In: Marine mammal science. - : Wiley. - 0824-0469 .- 1748-7692. ; 27:2, s. 350-365
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- Abstract Development implies a change in allocation of resources from somatic growth to reproduction. In a highly variable environment, growth can vary from year to year thereby influencing the long-term life history perspective. The Galapagos sea lion (Zalophus wollebaeki) lives in a highly unpredictable marine environment in which food abundance varies not only seasonally, but also annually due to El Niño. Galapagos sea lions are restricted to a patch of cold upwelling waters surrounding the archipelago and are closely tied to land as nursing females alternate between foraging at sea and nursing ashore. Therefore, their offspring are especially vulnerable to ocean warming causing reduced food abundance. We found a significant correlation between sea surface temperature (SST) and early growth: Both mass at birth and linear growth within the first 2 mo of life correlated negatively with SST. Absolute mass gain was higher for males, but both sexes gained equally 1.9% of birth mass per day. Until the age of 3 yr male and female juveniles showed similar growth to an asymptotic mass of 40 and 35 kg, respectively. As a consequence of the highly variable environment, the plasticity in growth strategy of Galapagos sea lion juveniles appears wider than that of all other sea lions allowing them to cope with poor conditions.
Keyword
- Galapagos sea lion
- Zalophus wollebaeki
- life history
- growth
- El Niño
- sexual dimorphism
- NATURAL SCIENCES
- NATURVETENSKAP
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
- Marine mammal science (Search for host publication in LIBRIS)
To the university's database
- 1 of 1
- Previous record
- Next record
- To hitlist
Find more in SwePub
- By the author/editor
- Mueller, Birte
- Pörschmann, Ulri ...
- Wolf, Jochen B. ...
- Trillmich, Fritz
- Articles in the publication
- Marine mammal sc ...
- By the university
- Uppsala University
Search outside SwePub
- Extend your search to:
- Google Book Search
- Google Scholar
Kungliga biblioteket hanterar dina personuppgifter i enlighet med EU:s dataskyddsförordning (2018), GDPR. Läs mer om hur det funkar här.
Så här hanterar KB dina uppgifter vid användning av denna tjänst.
- Copyright © LIBRIS - National Library Systems
- LIBRIS.kb.se
