Evidence for a mechanism of phenotypic integration of behaviour and innate immunity in a wild rodent: implications for animal personality and ecological immunology

Dosmann, Andy; Brooks, Katherine C.; Mateo, Jill M.

doi:10.1016/j.anbehav.2014.12.026

Cited by 20 publications

(14 citation statements)

References 80 publications

(174 reference statements)

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“…In some formulations, traits such as RRV or condition might be considered to be part of a POLS; for example, “slow” individuals might have consistently higher body condition or maintain a higher RRV longer, but we did not find this. While some previous works have found relationships supporting the predictions of the POLS (Adriaenssens & Johnsson, ; Dammhahn, ; Dosmann, Brooks, & Mateo, ; Hall et al., ; Hawlena et al., ; Montiglio, Garant, Bergeron, Dubuc Messier, & Réale, ; Niemelä, Dingemanse, Alioravainen, Vainikka, & Kortet, ; Niemelä, Lattenkamp, & Dingemanse, ), such predictions are not always confirmed (David, Pinxten, Martens, & Eens, ; Kluen, Siitari, & Brommer, ; Montiglio, Garant, Pelletier, & Réale, ; Réale, Martin, Coltman, Poissant, & Festa‐Bianchet, ). One possible explanation for variation among studies is the extent to which the behaviours assayed in each system differ from the theoretical concept of “risk‐taking” or “activity” which are employed in the POLS and similar hypotheses.…”

Section: Discussionmentioning

confidence: 88%

Lifespan and age, but not residual reproductive value or condition, are related to behaviour in wild field crickets

et al. 2018

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Individuals frequently show long‐term consistency in behaviour over their lifetimes, referred to as “personality.” Various models, revolving around the use of resources and how they are valued by individuals, attempt to explain the maintenance of these different behavioural types within a population, and evaluating them is the key for understanding the evolution of behavioural variation. The pace‐of‐life syndrome hypothesis suggests that differences in personalities result from divergent life‐history strategies, with more active/risk‐taking individuals reproducing rapidly but dying young. However, studies of wild animals provide only limited support for key elements of this and related hypotheses, such as a negative relationship between residual reproductive value and activity. Furthermore, alternative models make divergent predictions regarding the relationship between risk‐taking behaviours and variables consistent in the short‐term, such as condition. To test these predictions, we regularly measured willingness to leave a shelter and the activity level of wild adult field crickets (Gryllus campestris) at both short and long intervals over their entire adult lives. We found some support for a pace‐of‐life syndrome influencing personality, as lifespan was negatively related to willingness to leave the shelter and activity. Crickets did not appear to protect their “assets” however, as estimates of residual reproductive value were not related to behaviour. Although there was considerable variance attributed to the short‐term consistency, neither trait was affected by phenotypic condition, failing to support either of the models we tested. Our study confirms that behaviours may covary with some life‐history traits and highlights the scales of temporal consistency that are more difficult to explain.

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Section: Discussionmentioning

confidence: 88%

Lifespan and age, but not residual reproductive value or condition, are related to behaviour in wild field crickets

et al. 2018

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“…However, new evidence suggests that baseline GCs can mediate stress‐dependent functions such as personality and immune response via GR receptor binding (Crespi et al . ; Dosmann, Brooks & Mateo ). Whichever the case, it is thus thought that within the context of reproduction, individuals should minimize or downregulate GC secretion, or minimize GC reactivity, when reproductive investment is high.…”

Section: Gc Dose With Respect To Physiological Function and Potentialmentioning

confidence: 99%

“…These different functions are thought to be mediated by different cellular receptors, in which the high-affinity mineralocorticoid receptor (MR) mediates responses to changes in 'baseline' GC levels, whereas the low-affinity glucocorticoid receptor (GR) mediates the responses to 'stress-induced' GC levels (Breuner & Orchinik 2002;Romero 2004;Landys, Ramenofsky & Wingfield 2006). However, new evidence suggests that baseline GCs can mediate stress-dependent functions such as personality and immune response via GR receptor binding (Crespi et al 2013;Dosmann, Brooks & Mateo 2015). Whichever the case, it is thus thought that within the context of reproduction, individuals should minimize or downregulate GC secretion, or minimize GC reactivity, when reproductive investment is high.…”

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confidence: 99%

Glucocorticoid manipulations in free‐living animals: considerations of dose delivery, life‐history context and reproductive state

et al. 2015

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Summary1. Experimental glucocorticoid (GC) manipulations can be useful for identifying the mechanisms that drive life-history and fitness variation in free-living animals, but predicting the effects of GC treatment can be complicated. Much of the uncertainty stems from the multifaceted role of GCs in organismal metabolism, and their variable influence with respect to life-history stage, ecological context, age, sex and individual variation. 2. Glucocorticoid hormones have been implicated in the regulation of parental care in many vertebrate taxa but in two seemingly contradictory ways, which sets up a potential GC-induced 'reproductive conflict'. Circulating GCs mediate adaptive physiological and behavioural responses to stressful events, and elevated levels can lead to trade offs between reproductive effort and survival (e.g. the current reproduction vs. survival hypothesis). The majority of studies examining the fitness effects of GC manipulations extend from this hypothesis. However, when animals are not stressed (likely most of the time) baseline GCs act as key metabolic regulators of daily energy balance, homoeostasis, osmoregulation and food acquisition, with pleiotropic effects on locomotor activity or foraging behaviour. Slight increases in circulating baseline levels can then have positive effects on reproductive effort (e.g. the 'cort' fitness/adaptation hypotheses), but comparatively few GC manipulation studies have targeted these small, non-stress induced increases. 3. We review studies of GC manipulations and examine the specific hypotheses used to predict the effects of manipulations in wild, breeding vertebrates. We argue that given the dichotomous function of GCs the current 'reproduction vs. survival' paradigm is unnecessarily restrictive and predicts only deleterious GC effects on fitness. Therefore, a broader set of hypotheses should be considered when testing the fitness effects of GC manipulations. 4. When framing experimental manipulation studies, we urge researchers to consider three key points: life-history context (e.g. long vs. short lived, semelparous vs. iteroparous, etc.), ecological context and dose delivery.

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“…Like other important trade-offs, the thermoregulationepredator avoidance trade-off may be plastic in response to environmental conditions (Dosmann, Brooks, & Mateo, 2015;Stahlschmidt & Adamo, 2013a;Stahlschmidt, O'Leary, & Adamo, 2014). For example, pathogen exposure varies temporally and spatially (Raucher, 2002;Suwanpakdee et al, 2015), and it can influence thermoregulation and predator avoidance independently.…”

mentioning

confidence: 97%

Immune activation influences the trade-off between thermoregulation and shelter use

2016

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Evidence for a mechanism of phenotypic integration of behaviour and innate immunity in a wild rodent: implications for animal personality and ecological immunology

Cited by 20 publications

References 80 publications

Lifespan and age, but not residual reproductive value or condition, are related to behaviour in wild field crickets

Lifespan and age, but not residual reproductive value or condition, are related to behaviour in wild field crickets

Glucocorticoid manipulations in free‐living animals: considerations of dose delivery, life‐history context and reproductive state

Immune activation influences the trade-off between thermoregulation and shelter use

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