Individual differences in metabolism predict coping styles in fish

Martins, Catarina I.M.; Castanheira, Maria Filipa; Engrola, Sofía; Costas, Benjamín; Conceição, Luı́s E.C.

doi:10.1016/j.applanim.2010.12.007

Cited by 80 publications

(73 citation statements)

References 38 publications

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“…maintenance of reproductive tissues) under challenging conditions, and could be explained at the proximate level by sex differences in stress responsiveness. The stress response often results in a dramatic change in metabolic activity, which allows the animal to manage situations that perturb homeostasis (Dlugosz et al, 2012;Martins et al, 2011;Øverli et al, 2005). Although we measured baseline cortisol levels, and found no correlation between baseline cortisol and metabolic rates (i.e.…”

Section: Discussionmentioning

confidence: 68%

Phenotypic differences between the sexes in the sexually plastic mangrove rivulus fish (Kryptolebias marmoratus)

Garcia

Ferro

Mattox

et al. 2016

Journal of Experimental Biology

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To maximize reproductive success, many animal species have evolved functional sex change. Theory predicts that transitions between sexes should occur when the fitness payoff of the current sex is exceeded by the fitness payoff of the opposite sex. We examined phenotypic differences between the sexes in a sexchanging vertebrate, the mangrove rivulus fish (Kryptolebias marmoratus), to elucidate potential factors that might drive the 'decision' to switch sex. Rivulus populations consist of self-fertilizing hermaphrodites and males. Hermaphrodites transition into males under certain environmental conditions, affording us the opportunity to generate 40 hermaphrodite-male pairs where, within a pair, individuals possessed identical genotypes despite being different sexes. We quantified steroid hormone levels, behavior (aggression and risk taking), metabolism and morphology (organ masses). We found that hermaphrodites were more aggressive and risk averse, and had higher maximum metabolic rates and larger gonadosomatic indices. Males had higher steroid hormone levels and showed correlations among hormones that hermaphrodites lacked. Males also had greater total mass and somatic body mass and possessed considerable fat stores. Our findings suggest that there are major differences between the sexes in energy allocation, with hermaphrodites exhibiting elevated maximum metabolic rates, and showing evidence of favoring investments in reproductive tissues over somatic growth. Our study serves as the foundation for future research investigating how environmental challenges affect both physiology and reproductive investment and, ultimately, how these changes dictate the transition between sexes.

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Section: Discussionmentioning

confidence: 68%

Phenotypic differences between the sexes in the sexually plastic mangrove rivulus fish (Kryptolebias marmoratus)

Garcia

Ferro

Mattox

et al. 2016

Journal of Experimental Biology

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“…Seabream Sparus aurata (Herrera et al 2014), Senegalense sole Solea senegalensis Martins et al 2011), European seabass Dicentrarchus labrax (Killen et al 2012) and Zebrafish Danio rerio (Rey, Digka & MacKenzie 2015). In the case of Tilapia the strong correlations between DAI and personality highlight the usefulness of Duration of Appetite Inhibition as a screening tool for boldness.…”

Section: Accepted Articlementioning

confidence: 99%

“…Recent progress addressing animal personalities (Overli et al 2007;Huntingford et al 2010;Silva et al 2010;Martins et al 2011;Castanheira et al 2013b;Rey et al 2013;Herrera et al 2014) has highlighted a central role for individual variation in ecological and environmental challenges (Sih, Bell & Johnson 2004;Reale et al 2007) and as a tool for resolving variation (MacKenzie, et al 2009). Animal personality traits have been described as underlying tendencies that affect behaviour across contexts, that are stable over time and that vary across individuals (Reale et al 2007;Dingemanse et al 2010).…”

Section: Accepted Articlementioning

confidence: 99%

Thermal preference predicts animal personality in Nile tilapia Oreochromis niloticus

Cerqueira

Rey

Silva

et al. 2016

Journal of Animal Ecology

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Summary1. Environmental temperature gradients provide habitat structure in which fish orientate and individual thermal choice may reflect an essential integrated response to the environment. The use of subtle thermal gradients likely impacts upon specific physiological and behavioural processes reflected as a suite of traits described by animal personality. In this study we examine the relationship between thermal choice, animal personality and the impact of infection upon this interaction.2. We predicted that thermal choice in Nile tilapia Oreochromis niloticus reflects distinct personality traits and that under a challenge individuals exhibit differential thermal distribution. Accepted ArticleThis article is protected by copyright. All rights reserved.3. Nile Tilapia were screened following two different protocols: 1) a suite of individual behavioural tests to screen for personality and 2) thermal choice in a custom-built tank with a thermal gradient (T CH tank) ranging from 21 to 33 ºC. A first set of fish were screened for behaviour and then thermal preference and a second set were tested in the opposite fashion; thermal then behaviour. The final thermal distribution of the fish after 48 h was assessed reflecting final thermal preferendum. Additionally, fish were then challenged using a bacterial Streptococcus iniae model infection to assess the behavioural fever response of proactive and reactive fish.4. Results showed that individuals with preference for higher temperatures were also classified as proactive with behavioural tests and reactive contemporaries chose significantly lower water temperatures. All groups exhibited behavioural fever recovering personality-specific thermal preferences after 5 days.5. Our results show that thermal preference can be used as a proxy to assess personality traits in Nile tilapia and it is a central factor to understand the adaptive meaning of animal personality within a population.Importantly, response to infection by expressing behavioural fever overrides personality related thermal choice.

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“…Each fish was placed individually in a chamber. Since housing in respirometry chambers is likely to induce a stress response (Careau et al, 2008;Martins et al, 2011) the first 3 h of measurements taken during the period of light were discarded. The water inlet was always at oxygen saturation level while the oxygen concentration at the outlet was measured by a polarigraphic microelectrode model 8-730 (Microelectrodes Inc., USA).…”

Section: Experimental Procedures 221 Respirometrymentioning

confidence: 99%

“…RMR has been used to understand the metabolic consequences of some stressors (Careau et al, 2008;Martins et al, 2011). In fish, metabolic rate may be influenced by a large number of internal and external factors (Brett and Groves, 1979).…”

Section: Introductionmentioning

confidence: 99%

Daily oxygen consumption rhythms of Senegalese sole solea senegalensis (Kaup, 1858) juveniles

Castanheira

Martins

Engrola

et al. 2011

Journal of Experimental Marine Biology and Ecology

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Senegalese sole is known to be a species with pronounced nocturnal feeding behaviour. However, as for most fish species, there is a lack of knowledge concerning the influence of such biological rhythm on metabolic rate. The aim of this study was to determine whether individual variation in routine and fed metabolic rate was affected by daily light-dark rhythms in juveniles of Senegalese sole. The individual oxygen consumption measurements in Senegalese sole juveniles were determined by flow-through respirometry, at fasted conditions and after the fish were fed a single meal, the meal time started at 0930 h and fish fed ad libitum for 30 min. The measurements were made during 22 h, of which 8 h was in the light and 14 h in the dark, and started immediately after transfer to the respiratory chambers at 1100 h. The results suggest an influence of light-dark cycles in routine metabolism. It was observed that oxygen consumption increased during the dark phase in fasted fish (FAST) but was higher during the light phase in fed fish (FEED). However, when feed is provided during the light phase, juveniles are capable of shifting oxygen consumption rhythms to respond to the energetic demands of digestion and growth. These results suggest that routine metabolism varies according to the species natural habits as Senegalese sole is known to be nocturnal. The findings of this study underline the importance of understanding the biological rhythms of the species under study before metabolic data are interpreted.

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Individual differences in metabolism predict coping styles in fish

Cited by 80 publications

References 38 publications

Phenotypic differences between the sexes in the sexually plastic mangrove rivulus fish (Kryptolebias marmoratus)

Phenotypic differences between the sexes in the sexually plastic mangrove rivulus fish (Kryptolebias marmoratus)

Thermal preference predicts animal personality in Nile tilapia Oreochromis niloticus

Daily oxygen consumption rhythms of Senegalese sole solea senegalensis (Kaup, 1858) juveniles

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