期刊
JOURNAL OF ANIMAL ECOLOGY
卷 85, 期 4, 页码 927-937出版社
WILEY-BLACKWELL
DOI: 10.1111/1365-2656.12524
关键词
acute stress; behavioural syndrome; coping style; intraspecific variation; Japanese flounder; respirometry; temperament
资金
- National Natural Science Foundation of China [41376134]
- Shanghai Universities First-Class Disciplines Project of Fisheries
- Fonds de Recherche du Quebec Nature et Technologies
Survival depends on appropriate behavioural and physiological responses to danger. In addition to active fight-flight' defence responses, a passive freeze-hide' response is adaptive in some contexts. However, the physiological mechanisms determining which individuals choose a given defence response remain poorly understood. We examined the relationships among personality, metabolic performance and physiological stress responses across an environmental gradient in the olive flounder, Paralichthys olivaceus. We employed four behavioural assays to document the existence of two distinct behavioural types (bold' and shy') in this species. We found consistent metabolic differences between individuals of a given behavioural type across an environmental gradient: shy individuals had overall lower aerobic scope, maximum metabolic rate and standard metabolic rate than bold individuals in both high (25 ppt) and low (3 ppt) salinity. These behavioural and metabolic differences translated into divergent physiological responses during acute stress: shy individuals adopted a passive freeze-hide' response by reducing their oxygen consumption rates (akin to shallow breathing) whereas bold individuals adopted an active fight-flight' response by increasing their rates of respiration. These distinct defence strategies were repeatable within individuals between salinity treatments. Although it has been suggested theoretically, this is the first empirical evidence that the metabolic response to stressful situations differs between bold and shy individuals. Our results emphasize the importance of incorporating physiological measures to understand the mechanisms driving persistent inter-individual differences in animals.
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