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Rödel HG, Jardim V, Rangassamy M, Jaravel L, Jacquet D, Monclús R, Féron C, Costantini D. Early life parameters and personality affect oxidative status during adulthood in an altricial rodent. Physiol Rep 2022; 10:e15427. [PMID: 36200138 PMCID: PMC9535260 DOI: 10.14814/phy2.15427] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2022] [Accepted: 07/26/2022] [Indexed: 06/16/2023] Open
Abstract
It is increasingly recognized that alterations of the cellular oxidative status might be an important cost underlying challenging early life conditions. For example, an increased litter size can impose challenges as the offspring will face increased competition for maternal resources. Within a litter, individuals with relatively higher starting mass typically show higher growth rates, which can lead to increased oxidative damage. We investigated the long-term consequences of these early life parameters on the oxidative status in mature mound-building mice (Mus spicilegus). Individual differences in the animals' exploration tendency were assessed by repeated open field and novel object tests. We predicted less exploratory phenotypes, which typically show a higher stress responsiveness, to be particularly susceptible to possible effects of these early life parameters on oxidative status. We quantified oxidative damage of DNA (8-hydroxy-2'-deoxyguanosine levels, 8-OHdG) and proteins (protein carbonyl content, PCC), and activities of the antioxidants catalase (CAT), glutathione peroxidase (GPx), and superoxide dismutase (SOD) in liver and skeletal muscle tissue. 8-OHdG levels were positively associated with CAT and SOD in both tissues, indicating that increased oxidative DNA damage was associated with an upregulation of antioxidant production. Hepatic DNA damage after maturity was increased in animals from larger litters. In less exploratory animals, DNA damage and the activity of CAT and SOD in the muscle were increased, but only in individuals with higher relative starting mass (measured on postnatal day 9). This interaction may be explained by the typically higher adrenocortical activity in less exploratory phenotypes and by the higher growth in relatively heavier pups, two factors known to increase oxidative stress. These findings contribute to enlightening the complex interplay between early life conditions, personality, and oxidative status.
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Affiliation(s)
- Heiko G. Rödel
- Laboratoire d'Ethologie Expérimentale et Comparée UR 4443 (LEEC)Université Sorbonne Paris NordVilletaneuseFrance
| | - Veridiana Jardim
- Laboratoire d'Ethologie Expérimentale et Comparée UR 4443 (LEEC)Université Sorbonne Paris NordVilletaneuseFrance
- Laboratory of Ethology, Ecology and Evolution of Social Insects, Department of Experimental PsychologyUniversity of Sao PauloSão PauloBrazil
| | - Marylin Rangassamy
- Laboratoire d'Ethologie Expérimentale et Comparée UR 4443 (LEEC)Université Sorbonne Paris NordVilletaneuseFrance
| | - Ludivine Jaravel
- Laboratoire d'Ethologie Expérimentale et Comparée UR 4443 (LEEC)Université Sorbonne Paris NordVilletaneuseFrance
| | - Daphné Jacquet
- Laboratoire d'Ethologie Expérimentale et Comparée UR 4443 (LEEC)Université Sorbonne Paris NordVilletaneuseFrance
| | - Raquel Monclús
- Laboratoire d'Ethologie Expérimentale et Comparée UR 4443 (LEEC)Université Sorbonne Paris NordVilletaneuseFrance
| | - Christophe Féron
- Laboratoire d'Ethologie Expérimentale et Comparée UR 4443 (LEEC)Université Sorbonne Paris NordVilletaneuseFrance
| | - David Costantini
- Unité Physiologie Moléculaire et Adaptation (PhyMA)Muséum National d'Histoire Naturelle, CNRS, CP32ParisFrance
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Smeltzer EA, Stead SM, Li MF, Samson D, Kumpan LT, Teichroeb JA. Social sleepers: The effects of social status on sleep in terrestrial mammals. Horm Behav 2022; 143:105181. [PMID: 35594742 DOI: 10.1016/j.yhbeh.2022.105181] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/31/2021] [Revised: 04/12/2022] [Accepted: 04/22/2022] [Indexed: 11/18/2022]
Abstract
Social status among group-living mammals can impact access to resources, such as water, food, social support, and mating opportunities, and this differential access to resources can have fitness consequences. Here, we propose that an animal's social status impacts their access to sleep opportunities, as social status may predict when an animal sleeps, where they sleep, who they sleep with, and how well they sleep. Our review of terrestrial mammals examines how sleep architecture and intensity may be impacted by (1) sleeping conditions and (2) the social experience during wakefulness. Sleeping positions vary in thermoregulatory properties, protection from predators, and exposure to parasites. Thus, if dominant individuals have priority of access to sleeping positions, they may benefit from higher quality sleeping conditions and, in turn, better sleep. With respect to waking experiences, we discuss the impacts of stress on sleep, as it has been established that specific social statuses can be characterized by stress-related physiological profiles. While much research has focused on how dominance hierarchies impact access to resources like food and mating opportunities, differential access to sleep opportunities among mammals has been largely ignored despite its potential fitness consequences.
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Affiliation(s)
- E A Smeltzer
- Department of Anthropology, University of Toronto Scarborough, 1265 Military Trail, Scarborough, Ontario M1C 1A4, Canada
| | - S M Stead
- Department of Anthropology, University of Toronto Scarborough, 1265 Military Trail, Scarborough, Ontario M1C 1A4, Canada.
| | - M F Li
- Department of Anthropology, University of Toronto, 19 Russell St., Toronto, Ontario M5S 2S2, Canada
| | - D Samson
- Department of Anthropology, University of Toronto Mississauga, 3359 Mississauga Rd., Mississauga, Ontario L5L 1C6, Canada
| | - L T Kumpan
- Department of Anthropology, University of Toronto Scarborough, 1265 Military Trail, Scarborough, Ontario M1C 1A4, Canada
| | - J A Teichroeb
- Department of Anthropology, University of Toronto Scarborough, 1265 Military Trail, Scarborough, Ontario M1C 1A4, Canada
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Fernández Y, Arteaga L, Zepeda JA, Rödel HG, Hudson R, Bautista A. Stable individual differences in the frequency of chin‐marking behavior across development in the domestic rabbit. Ethology 2022. [DOI: 10.1111/eth.13285] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/26/2022]
Affiliation(s)
- Yesenia Fernández
- Centro Tlaxcala de Biología de la Conducta Universidad Autónoma de Tlaxcala Tlaxcala Mexico
- Doctorado en Ciencias Biológicas Universidad Autónoma de Tlaxcala Tlaxcala Mexico
| | - Lourdes Arteaga
- Centro Tlaxcala de Biología de la Conducta Universidad Autónoma de Tlaxcala Tlaxcala Mexico
| | - José Alfredo Zepeda
- Preparatoria Alfonso Calderon Moreno Benemérita Universidad Autónoma de Puebla Puebla Mexico
| | - Heiko G Rödel
- Laboratoire d’Ethologie Expérimentale et Comparée (LEEC) Université Sorbonne Paris Nord Villetaneuse France
| | - Robyn Hudson
- Laboratorio de Psicobiología del Desarrollo, Instituto de Investigaciones Biomédicas Universidad Nacional Autónoma de México Ciudad de Mexico Mexico
| | - Amando Bautista
- Centro Tlaxcala de Biología de la Conducta Universidad Autónoma de Tlaxcala Tlaxcala Mexico
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Szenczi P, González D, Martínez-Byer S, Rödel HG, Hudson R, Bánszegi O. Motivation matters: lighter littermates of the domestic cat compete more successfully for meat at weaning. Behav Ecol Sociobiol 2021. [DOI: 10.1007/s00265-021-03079-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
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Rödel HG, Oppelt C, Starkloff A, Prager N, Long E, Rüdiger AT, Seltmann MW, Monclús R, Hudson R, Poteaux C. Within-litter covariance of allele-specific MHC heterozygosity, coccidian endoparasite load and growth is modulated by sibling differences in starting mass. Oecologia 2020; 194:345-357. [PMID: 32980896 DOI: 10.1007/s00442-020-04764-z] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2018] [Accepted: 09/19/2020] [Indexed: 10/23/2022]
Abstract
Although littermates in altricial mammals usually experience highly similar environmental conditions during early life, considerable differences in growth and health can emerge among them. In a study on subadults of a European rabbit (Oryctolagus cuniculus) population with low MHC polymorphism, we tested whether litter-sibling differences in endoparasitic coccidia load and body mass at the end of the vegetation period were associated with within-litter differences in starting body mass (measured around 2 weeks prior to weaning) and in immune-genetic (MHC class II DRB) constitution. We hypothesized that siblings with a lighter starting mass might be more susceptible to endoparasite infections and thus, negative effects of a more unfavourable MHC constitution might be particularly pronounced in such individuals. Within-litter comparisons revealed that animals with a lighter starting mass reached a relatively lower body mass in autumn. Furthermore, there were indications for an allele-specific heterozygote advantage, as animals with heterozygous combinations of the allele Orcu-DRB*4 had relatively lower hepatic coccidia loads than their littermates with certain homozygous allele combinations. Consistent with our hypothesis, significantly higher hepatic coccidia loads and tendentially lower autumn body masses in homozygous compared to heterozygous individuals for the allele Orcu-DRB*4 were evident in initially lighter but not in heavier siblings, suggesting synergistic effects between an unfavourable MHC constitution and a light starting mass. Taken together, these effects might lead to notable differences in fitness among litter siblings, as a low body mass and a high endoparasite burden are key factors limiting young rabbits' survival during winter.
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Affiliation(s)
- Heiko G Rödel
- Laboratoire d'Ethologie Expérimentale et Comparée UR 4443, Université Sorbonne Paris Nord, 93430, Villetaneuse, France. .,Department of Animal Physiology, University of Bayreuth, 95440, Bayreuth, Germany.
| | - Claus Oppelt
- Department of Animal Physiology, University of Bayreuth, 95440, Bayreuth, Germany
| | - Anett Starkloff
- Department of Animal Physiology, University of Bayreuth, 95440, Bayreuth, Germany
| | - Nelly Prager
- Laboratoire d'Ethologie Expérimentale et Comparée UR 4443, Université Sorbonne Paris Nord, 93430, Villetaneuse, France
| | - Emilie Long
- Laboratoire d'Ethologie Expérimentale et Comparée UR 4443, Université Sorbonne Paris Nord, 93430, Villetaneuse, France
| | - Anna-Theresa Rüdiger
- Department of Animal Physiology, University of Bayreuth, 95440, Bayreuth, Germany
| | - Martin W Seltmann
- Department of Animal Physiology, University of Bayreuth, 95440, Bayreuth, Germany.,Department of Biology, University of Turku, 20014, Turku, Finland
| | - Raquel Monclús
- Laboratoire d'Ethologie Expérimentale et Comparée UR 4443, Université Sorbonne Paris Nord, 93430, Villetaneuse, France
| | - Robyn Hudson
- Instituto de Investigaciones Biomédicas, Universidad Nacional Autónoma de México, 04510, Mexico City, Mexico
| | - Chantal Poteaux
- Laboratoire d'Ethologie Expérimentale et Comparée UR 4443, Université Sorbonne Paris Nord, 93430, Villetaneuse, France
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Physiological Stress Integrates Resistance to Rattlesnake Venom and the Onset of Risky Foraging in California Ground Squirrels. Toxins (Basel) 2020; 12:toxins12100617. [PMID: 32992585 PMCID: PMC7601495 DOI: 10.3390/toxins12100617] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2020] [Revised: 09/22/2020] [Accepted: 09/23/2020] [Indexed: 12/17/2022] Open
Abstract
Using venom for predation often leads to the evolution of resistance in prey. Understanding individual variation in venom resistance is key to unlocking basic mechanisms by which antagonistic coevolution can sustain variation in traits under selection. For prey, the opposing challenges of predator avoidance and resource acquisition often lead to correlated levels of risk and reward, which in turn can favor suites of integrated morphological, physiological and behavioral traits. We investigate the relationship between risk-sensitive behaviors, physiological resistance to rattlesnake venom, and stress in a population of California ground squirrels. For the same individuals, we quantified foraging decisions in the presence of snake predators, fecal corticosterone metabolites (a measure of “stress”), and blood serum inhibition of venom enzymatic activity (a measure of venom resistance). Individual responses to snakes were repeatable for three measures of risk-sensitive behavior, indicating that some individuals were consistently risk-averse whereas others were risk tolerant. Venom resistance was lower in squirrels with higher glucocorticoid levels and poorer body condition. Whereas resistance failed to predict proximity to and interactions with snake predators, individuals with higher glucocorticoid levels and in lower body condition waited the longest to feed when near a snake. We compared alternative structural equation models to evaluate alternative hypotheses for the relationships among stress, venom resistance, and behavior. We found support for stress as a shared physiological correlate that independently lowers venom resistance and leads to squirrels that wait longer to feed in the presence of a snake, whereas we did not find evidence that resistance directly facilitates latency to forage. Our findings suggest that stress may help less-resistant squirrels avoid a deadly snakebite, but also reduces feeding opportunities. The combined lethal and non-lethal effects of stressors in predator–prey interactions simultaneously impact multiple key traits in this system, making environmental stress a potential contributor to geographic variation in trait expression of toxic predators and resistant prey.
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