Blood Parasite Infection Intensity Covaries with Risk‐Taking Personality in Male Carpetan Rock Lizards (<i>Iberolacerta cyreni</i>)

Horváth, Gergely; Martı́n, José; López, Pílar; Garamszegi, László Zsolt; Bertók, Péter; Herczeg, Gábor

doi:10.1111/eth.12475

Cited by 22 publications

(29 citation statements)

References 75 publications

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“…Furthermore, many studies investigating the personality-immune relationship show similar differential effects of parasite infection on more fundamentally distinct behavioral categories (e.g. activity vs. boldness) (Kekäläinen et al 2014; Horváth et al 2016). Our results suggest that the immune-personality relationship is highly complex, and that a single experience (e.g.…”

Section: Discussionmentioning

confidence: 99%

Adult bacterial exposure increases behavioral variation and drives higher repeatability in field crickets

DiRienzo

Niemelä

Hedrick

et al. 2016

Behav Ecol Sociobiol

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Among-individual differences in behavior are now a widely studied research-focus within the field of behavioral ecology. Furthermore, elements of an animal’s internal state, such as energy or fat reserves, and infection status can have large impacts on behaviors. Despite this, we still know little regarding how state may affect behavioral variation. Recent exposure to pathogens may have a particularly large impact on behavioral expression given that it likely activates costly immune pathways, potentially forcing organism to make behavioral tradeoffs. In this study we investigate how recent exposure to a common bacterial pathogen, Serratia marcescens, affects both the mean behavioral expression and the among-individual differences (i.e. variation) in boldness behavior in the field cricket, Gryllus integer. We find that recent pathogen exposure does not affect mean behavioral expression of the treatment groups, but instead affects behavioral variation and repeatability. Specifically, bacterial exposure drove large among-individual variation, resulting in high levels of repeatability in some aspects of boldness (willingness to emerge into a novel environment), but not others (latency to become active in novel environment), compared to non-infected crickets. Interestingly, sham injection resulted in a universal lack of among-individual differences. Our results highlight the sensitivity of among-individual variance and repeatability estimates to ecological and environmental factors that individuals face throughout their lives.

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Section: Discussionmentioning

confidence: 99%

Adult bacterial exposure increases behavioral variation and drives higher repeatability in field crickets

DiRienzo

Niemelä

Hedrick

et al. 2016

Behav Ecol Sociobiol

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“…Direct or indirect negative effects of infections (e.g. low body condition) may result in differences in individual state, which may eventuate the emergence of individual behavioural strategies in order to cope with these disadvantages (DiRienzo et al 2015(DiRienzo et al , 2016Horváth et al 2016). In arthropods, Wolbachia are important parasitic bacteria (Hilgenboecker et al 2008;Werren et al 2008) with remarkable effects on hosts' physiology, including parthenogenesis, reproductive incompatibility, feminization and male killing (see Werren and Windsor 2000;Werren et al 2008;Le Clec'h et al 2012, 2013.…”

Section: Introductionmentioning

confidence: 99%

Roll with the fear: environment and state dependence of pill bug (Armadillidium vulgare) personalities

Horváth

Garamszegi

Bereczki

et al. 2019

Sci Nat

Self Cite

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Most studies on animal personality evaluate individual mean behaviour to describe individual behavioural strategy, while often neglecting behavioural variability on the within-individual level. However, within-individual behavioural plasticity (variation induced by environment) and within-individual residual variation (regulatory behavioural precision) are recognized as biologically valid components of individual behaviour, but the evolutionary ecology of these components is still less understood. Here, we tested whether behaviour of common pill bugs (Armadillidium vulgare) differs on the among-and within-individual level and whether it is affected by various individual specific state-related traits (sex, size and Wolbachia infection). To this aim, we assayed risk-taking in familiar vs. unfamiliar environments 30 times along 38 days and applied double modelling statistical technique to handle the complex hierarchical structure for both individual-specific trait means and variances. We found that there are significant among-individual differences not only in mean risk-taking behaviour but also in environment-and time-induced behavioural plasticity and residual variation. Wolbachia-infected individuals took less risk than healthy conspecifics; in addition, individuals became more risk-averse with time. Residual variation decreased with time, and individuals expressed higher residual variation in the unfamiliar environment. Further, sensitization was stronger in females and in larger individuals in general. Our results suggest that among-individual variation, behavioural plasticity and residual variation are all (i) biologically relevant components of an individual's behavioural strategy and (ii) responsive to changes in environment or labile state variables. We propose pill bugs as promising models for personality research due to the relative ease of getting repeated behavioural measurements.

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“…Positive correlations between boldness and reproductive success have been found (Smith & Blumstein, 2008). However, individuals that are more exploratory may expose themselves to higher risk of predation (e.g., Martin & Réale, 2008) and may also host higher parasite loads if they have greater home range or explore a greater diversity of habitats in comparison with less exploratory individuals (e.g., Barber, Mora, Payne, Weinersmith, & Sih, 2017; Bohn et al, 2017; Garcia‐Longoria, Garamszegi, & Møller, 2014; Horváth et al, 2016; Patterson & Schulte‐Hostedde, 2011). In contrast, shyer individuals expose themselves less to risky situations by limiting their foraging activity in comparison with bolder individuals (Réale et al, 2007) and this may adversely affect their nutritional status (Barber et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

Individual behavioral differences and health of golden‐headed lion tamarins (Leontopithecus chrysomelas)

Costa

Nogueira-Filho

Vleeschouwer

et al. 2020

American J Primatol

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Individual behavioral differences may influence how animals cope with altered environments. Depending on their behavioral traits, individuals may thus vary in how their health is affected by environmental conditions. We investigated the relationship between individual behavior of free-living golden-headed lion tamarins (Leontopithecus chrysomelas) responding to a novel object (to assess explorationavoidance), and their habitat use and health status (endoparasitism; clinical measures: biometric data, heart rate, respiratory frequency, and temperature; fecal glucocorticoid metabolites). As parasite transmission can be affected by individual variation in social contact and social grooming, we also evaluated whether more sociable individuals show higher endoparasite loads compared with less sociable animals. Four groups living in landscapes with different levels of human disturbance were investigated: two in degraded forest fragments in an agricultural matrix (DFAM-higher disturbance), and two in a cocoa agroforestry system (cabruca-lower disturbance) in the Atlantic forest of South Bahia, Brazil. Using a subjective ratings approach, highly correlated adjective descriptors were combined to produce z-score ratings of one derived variable ("confidence"), which was selected to characterize the tamarins' exploration/avoidance responses during a novel object test. The higher the confidence score, the longer female tamarins spent foraging for prey independent of landscape, and the greater their body mass independent of sex and landscape. Only DFAM individuals showed intestinal parasite infection. Endoparasite loads were positively correlated with the number of grooming partners, suggesting an association between social grooming and transmission (more groomers = more endoparasites). Individual behavior, including in a test situation, may thus have some predictive value for behavior in a free-living context, and for its health consequences.

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Blood Parasite Infection Intensity Covaries with Risk‐Taking Personality in Male Carpetan Rock Lizards (Iberolacerta cyreni)

Cited by 22 publications

References 75 publications

Adult bacterial exposure increases behavioral variation and drives higher repeatability in field crickets

Adult bacterial exposure increases behavioral variation and drives higher repeatability in field crickets

Roll with the fear: environment and state dependence of pill bug (Armadillidium vulgare) personalities

Individual behavioral differences and health of golden‐headed lion tamarins (Leontopithecus chrysomelas)

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