onr:"swepub:oai:DiVA.org:su-192026"
Search: onr:"swepub:oai:DiVA.org:su-192026" > The link between re...
- 1 of 1
- Previous record
- Next record
- To hitlist
The link between relative brain size and cognitive ageing in female guppies (Poecilia reticulata) artificially selected for variation in brain size
-
- Boussard, Annika (author)
- Stockholms universitet,Zoologiska institutionen
-
- Amcoff, Mirjam (author)
- Stockholms universitet,Zoologiska institutionen
-
- Buechel, Séverine D. (author)
- Stockholms universitet,Zoologiska institutionen
- show more...
- show less...
- (creator_code:org_t)
- Elsevier BV, 2021
- 2021
- English.
- In: Experimental Gerontology. - : Elsevier BV. - 0531-5565 .- 1873-6815. ; 146
- Journal article (peer-reviewed)
Abstract
Subject headings
Close
- Cognitive ageing is the general process when certain mental skills gradually deteriorate with age. Across species, there is a pattern of a slower brain structure degradation rate in large-brained species. Hence, having a larger brain might buffer the impact of cognitive ageing and positively affect survival at older age. However, few studies have investigated the link between relative brain size and cognitive ageing at the intraspecific level. In particular, experimental data on how brain size affects brain function also into higher age is largely missing. We used 288 female guppies (Poecilia reticulata), artificially selected for large and small relative brain size, to investigate variation in colour discrimination and behavioural flexibility, at 4-6, 12 and 24 months of age. These ages are particularly interesting since they cover the life span from sexual maturation until maximal life length under natural conditions. We found no evidence for a slower cognitive ageing rate in large-brained females in neither initial colour discrimination nor reversal learning. Behavioural flexibility was predicted by large relative brain size in the youngest group, but the effect of brain size disappeared with increasing age. This result suggests that cognitive ageing rate is faster in large-brained female guppies, potentially due to the faster ageing and shorter lifespan in the large-brained selection lines. It also means that cognition levels align across different brain sizes with older age. We conclude that there are cognitive consequences of ageing that vary with relative brain size in advanced learning abilities, whereas fundamental aspects of learning can be maintained throughout the ecologically relevant life span.
Subject headings
- MEDICIN OCH HÄLSOVETENSKAP -- Annan medicin och hälsovetenskap -- Gerontologi, medicinsk/hälsovetenskaplig inriktning (hsv//swe)
- MEDICAL AND HEALTH SCIENCES -- Other Medical and Health Sciences -- Gerontology, specialising in Medical and Health Sciences (hsv//eng)
Keyword
- Senescence
- Behavioural flexibility
- Reversal learning
Publication and Content Type
- ref (subject category)
- art (subject category)
Find in a library
- Experimental Gerontology (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
- Boussard, Annika
- Amcoff, Mirjam
- Buechel, Séverin ...
- Kotrschal, Alexa ...
- Kolm, Niclas
- About the subject
-
- MEDICAL AND HEALTH SCIENCES
- MEDICAL AND HEAL ...
- and Other Medical an ...
- and Gerontology spec ...
- Articles in the publication
- Experimental Ger ...
- By the university
- Stockholm 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
