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Fast life-histories...
Fast life-histories are associated with larger brain size in killifishes
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- Eckerström-Liedholm, Simon, 1988- (författare)
- Stockholms universitet,Zoologiska institutionen
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Sowersby, Will (författare)
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Kotrschal, Alexander (författare)
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visa fler...
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- Näslund, Joacim (författare)
- Stockholms universitet,Zoologiska institutionen
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- Rowiński, Piotr (författare)
- Stockholms universitet,Zoologiska institutionen
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- Gonzalez-Voyer, Alejandro (författare)
- Stockholms universitet,Zoologiska institutionen
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- Rogell, Björn (författare)
- Stockholms universitet,Zoologiska institutionen
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visa färre...
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(creator_code:org_t)
- Engelska.
- Relaterad länk:
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https://urn.kb.se/re...
Abstract
Ämnesord
Stäng
- Comparative studies suggest a negative relationship between pace of life-history, and relative energetic investment into brain size. However, since brain size typically evolves as a correlated response to selection on body size, any lag in brain size evolution will result in a shift in relative brain size (e.g. small body – large relative brain size).Coevolution between body size and life-history hence has the potential to drive secondary associations between relative brain size and life-history, when body size is correlated with life history. However, as far as we know, the relationship between relative brain size and life-history strategy has not been examined in systems that simultaneously present marked contrasts in life-history but no concordant shifts in body size. Using a common garden approach, we test the association between relative brain size and life-history in 21 species of killifish; a study system that fulfils the aforementioned requirements. Contrary to the prediction that brain size evolves through energetic trade-offs with life-history, we found that adults, but not juveniles, of fast-living species had larger relative brain sizes. Rather than an energetic link to life-history, our results suggest that fast- and slow-living species differ in terms of how cognitively demanding environments they inhabit are, or alternatively in the ontogenetic timing of somatic vs. neural growth.
Ämnesord
- NATURVETENSKAP -- Biologi -- Evolutionsbiologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Evolutionary Biology (hsv//eng)
Nyckelord
- Expensive Brain Hypothesis
- Energy trade-off Hypothesis
- comparative analysis
- life-history strategies
- trade-offs
- relative brain size
- etologi
- Ethology
Publikations- och innehållstyp
- vet (ämneskategori)
- ovr (ämneskategori)