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Individual response...
Individual response in body mass and basal metabolism to the risks of predation and starvation in passerines
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- Broggi, Juli (författare)
- Lund University,Lunds universitet,Evolutionär ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Ekologisk och evolutionär fysiologi,Forskargrupper vid Lunds universitet,Evolutionary ecology,Department of Biology,Faculty of Science,Ecological and Evolutionary Physiology,Lund University Research Groups,CSIC Estación Biológica de Doñana (EBD),CSIC National Museum Of Natural Sciences (MNCN)
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- Nilsson, Jan Åke (författare)
- Lund University,Lunds universitet,Evolutionär ekologi,Biologiska institutionen,Naturvetenskapliga fakulteten,Ekologisk och evolutionär fysiologi,Forskargrupper vid Lunds universitet,CAnMove - Centrum för forskning om djurs spridning och flyttning,Evolutionary ecology,Department of Biology,Faculty of Science,Ecological and Evolutionary Physiology,Lund University Research Groups,CAnMove - Centre for Animal Movement Research
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(creator_code:org_t)
- 2023-01-16
- 2023
- Engelska.
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Ingår i: The Journal of experimental biology. - : The Company of Biologists. - 1477-9145 .- 0022-0949. ; 226:2
- Relaterad länk:
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http://dx.doi.org/10... (free)
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https://lup.lub.lu.s...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- Wintering energy management in small passerines has focused on the adaptive regulation of the daily acquisition of energy reserves within a starvation-predation trade-off framework. However, the possibility that the energetic cost of living, i.e. basal metabolic rate (BMR), is being modulated as part of the management energy strategy has been largely neglected. Here, we addressed this possibility by experimentally exposing captive great tits (Parus major) during winter to two consecutive treatments of increased starvation and predation risk for each individual bird. Body mass and BMR were measured prior to and after each week-long treatment. We predicted that birds should be lighter but with a higher metabolic capacity (higher BMR) as a response to increased predation risk, and that birds should increase internal reserves while reducing their cost of living (lower BMR) when exposed to increased starvation risk. Wintering great tits kept a constant body mass independently of a week-long predation or starvation treatment. However, great tits reduced the cost of living (lower BMR) when exposed to the starvation treatment, while BMR remained unaffected by the predation treatment. Energy management in wintering small birds partly relies on BMR regulation, which challenges the current theoretical framework based on body mass regulation.
Ämnesord
- NATURVETENSKAP -- Biologi -- Ekologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Ecology (hsv//eng)
- NATURVETENSKAP -- Biologi -- Zoologi (hsv//swe)
- NATURAL SCIENCES -- Biological Sciences -- Zoology (hsv//eng)
Nyckelord
- Parus major
- Energy management
- Food restriction
- Optimal body mass theory
- Predation risk
- Winter ecology
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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