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Kriengwatana BP, Marshall CJ, Stevenson T, Monaghan P. Early life conditions reduce similarity between reproductive partners in HPA axis response to stress. Horm Behav 2024; 162:105508. [PMID: 38513527 DOI: 10.1016/j.yhbeh.2024.105508] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/01/2023] [Revised: 02/05/2024] [Accepted: 02/14/2024] [Indexed: 03/23/2024]
Abstract
Social environments modulate endocrine function, yet it is unclear whether individuals can become like their social partners in how they physiologically respond to stressors. This social transmission of hypothalamic-pituitary-adrenal (HPA) axis reactivity could have long-term consequences for health and lifespan of individuals if their social partners react to stressors with an exaggerated HPA axis response. We tested whether glucocorticoid levels in response to stress of breeding partners changes after breeding depending on whether partners had similar or dissimilar postnatal conditions. We manipulated postnatal conditions by mimicking early life stress in zebra finch chicks (Taeniopygia guttata) via postnatal corticosterone exposure. When they reached adulthood, we created breeding pairs where the female and male had experienced either the same or different early life hormonal treatment (corticosterone or control). Before and after breeding, we obtained blood samples within 3 min and after 10 min or 30 min of restraint stress (baseline, cort10, cort30). We found that corticosterone levels of individuals in response to restraint were affected by their own and their partner's early life conditions, but did not change after breeding. However, across all pairs, partners became more similar in cort30 levels after breeding, although differences between partners in cort10 remained greater in pairs with a corticosterone-treated female. Thus, we show that HPA axis response to stressors in adulthood can be modulated by reproductive partners and that similarity between partners is reduced when females are postnatally exposed to elevated glucocorticoids.
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Affiliation(s)
- Buddhamas P Kriengwatana
- Institute for Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Glasgow, UK.
| | - Christopher J Marshall
- Institute for Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Glasgow, UK.
| | - Tyler Stevenson
- Institute for Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Glasgow, UK.
| | - Pat Monaghan
- Institute for Biodiversity, Animal Health and Comparative Medicine, University of Glasgow, Glasgow, UK.
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2
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Santicchia F, Tranquillo C, Wauters LA, Palme R, Panzeri M, Preatoni D, Bisi F, Martinoli A. Physiological stress response to urbanisation differs between native and invasive squirrel species. THE SCIENCE OF THE TOTAL ENVIRONMENT 2024; 922:171336. [PMID: 38423339 DOI: 10.1016/j.scitotenv.2024.171336] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/31/2023] [Revised: 01/29/2024] [Accepted: 02/26/2024] [Indexed: 03/02/2024]
Abstract
Novel pressures derived from urbanisation can alter native habitats and ultimately impact wildlife. Coping with such human-driven changes might induce shifts in species phenotypic traits, such as physiological responses to anthropogenic stressors. Preadaptation to face those challenges has been suggested to favour settlement and spread of invasive alien species in urbanised areas which, consequently, might respond differently than ecologically similar native species to stressors posed by urbanisation. The activation of the hypothalamic-pituitary-adrenal (HPA) axis and the subsequent release of glucocorticoids (GCs) has been suggested to mediate responses to anthropogenic disturbance in vertebrates. Furthermore, intraspecific competition, in conjunction with stressors related to urbanisation, might affect invasive and native species physiological stress responses differently. Using a parallel pseudo-experimental study system we measured faecal glucocorticoid metabolite (FGM) concentrations of the native Eurasian red squirrel and the invasive alien Eastern grey squirrel along a rural-urban gradient and in relation to conspecific density. The two species responded differently to challenges posed by the synergic effect of urbanisation and intraspecific competition. Association of FGMs and conspecific density in native red squirrels varied between rural and suburban sites, potentially depending on differential HPA axis responses. In urban sites, this relationship did not differ significantly from that in rural and suburban ones. Conversely, invasive grey squirrels' FGMs did not vary in relation to conspecific density, nor differed along the rural-urban gradient. Improving knowledge about native and competing invasive species' physiological responses to anthropogenic stressors can support conservation strategies in habitats altered by man. Our findings suggested that the invasive squirrels might be preadapted to cope with these challenges in urbanised areas, potentially increasing their success under the future global change scenario.
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Affiliation(s)
- Francesca Santicchia
- Environment Analysis and Management Unit, Guido Tosi Research Group, Department of Theoretical and Applied Sciences, Università degli Studi dell'Insubria, via J. H. Dunant 3, 21100 Varese, Italy.
| | - Claudia Tranquillo
- Environment Analysis and Management Unit, Guido Tosi Research Group, Department of Theoretical and Applied Sciences, Università degli Studi dell'Insubria, via J. H. Dunant 3, 21100 Varese, Italy.
| | - Lucas A Wauters
- Environment Analysis and Management Unit, Guido Tosi Research Group, Department of Theoretical and Applied Sciences, Università degli Studi dell'Insubria, via J. H. Dunant 3, 21100 Varese, Italy; Evolutionary Ecology Group, Department of Biology, University of Antwerp, Campus Drie Eiken Universiteitsplein 1, 2610 Wilrijk, Belgium.
| | - Rupert Palme
- Unit of Physiology, Pathophysiology and Experimental Endocrinology, Department of Biomedical Sciences, University of Veterinary Medicine Vienna, Veterinärplatz 1, 1210 Vienna, Austria.
| | - Mattia Panzeri
- Environment Analysis and Management Unit, Guido Tosi Research Group, Department of Theoretical and Applied Sciences, Università degli Studi dell'Insubria, via J. H. Dunant 3, 21100 Varese, Italy
| | - Damiano Preatoni
- Environment Analysis and Management Unit, Guido Tosi Research Group, Department of Theoretical and Applied Sciences, Università degli Studi dell'Insubria, via J. H. Dunant 3, 21100 Varese, Italy.
| | - Francesco Bisi
- Environment Analysis and Management Unit, Guido Tosi Research Group, Department of Theoretical and Applied Sciences, Università degli Studi dell'Insubria, via J. H. Dunant 3, 21100 Varese, Italy.
| | - Adriano Martinoli
- Environment Analysis and Management Unit, Guido Tosi Research Group, Department of Theoretical and Applied Sciences, Università degli Studi dell'Insubria, via J. H. Dunant 3, 21100 Varese, Italy.
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Ruuskanen S. Early-life environmental effects on birds: epigenetics and microbiome as mechanisms underlying long-lasting phenotypic changes. J Exp Biol 2024; 227:jeb246024. [PMID: 38449325 DOI: 10.1242/jeb.246024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/08/2024]
Abstract
Although the long-lasting effects of variation in early-life environment have been well documented across organisms, the underlying causal mechanisms are only recently starting to be unraveled. Yet understanding the underlying mechanisms of long-lasting effects can help us predict how organisms will respond to changing environments. Birds offer a great system in which to study developmental plasticity and its underlying mechanisms owing to the production of large external eggs and variation in developmental trajectories, combined with a long tradition of applied, physiological, ecological and evolutionary research. Epigenetic changes (such as DNA methylation) have been suggested to be a key mechanism mediating long-lasting effects of the early-life environment across taxa. More recently, changes in the early-life gut microbiome have been identified as another potential mediator of developmental plasticity. As a first step in understanding whether these mechanisms contribute to developmental plasticity in birds, this Review summarizes how changes in early-life environment (both prenatal and postnatal) influence epigenetic markers and the gut microbiome. The literature shows how both early-life biotic (such as resources and social environment) and abiotic (thermal environment and various anthropogenic stressors) factors modify epigenetic markers and the gut microbiome in birds, yet data concerning many other environmental factors are limited. The causal links of these modifications to lasting phenotypic changes are still scarce, but changes in the hypothalamic-pituitary-adrenal axis have been identified as one putative pathway. This Review identifies several knowledge gaps, including data on the long-term effects, stability of the molecular changes, and lack of diversity in the systems studied, and provides directions for future research.
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Affiliation(s)
- Suvi Ruuskanen
- Department of Biological and Environmental Science, University of Jyväskylä, Survontie 9C, 40500 Jyväskylä, Finland
- Department of Biology, University of Turku, Vesilinnankatu 5, 20500 Turku, Finland
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4
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Siller Wilks SJ, Heidinger BJ, Westneat DF, Solomon J, Rubenstein DR. The impact of parental and developmental stress on DNA methylation in the avian hypothalamic-pituitary-adrenal axis. Mol Ecol 2024; 33:e17291. [PMID: 38343177 DOI: 10.1111/mec.17291] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2023] [Revised: 12/29/2023] [Accepted: 01/23/2024] [Indexed: 03/07/2024]
Abstract
The hypothalamic-pituitary-adrenal (HPA) axis coordinates an organism's response to environmental stress. The responsiveness and sensitivity of an offspring's stress response may be shaped not only by stressors encountered in their early post-natal environment but also by stressors in their parent's environment. Yet, few studies have considered how stressors encountered in both of these early life environments may function together to impact the developing HPA axis. Here, we manipulated stressors in the parental and post-natal environments in a population of house sparrows (Passer domesticus) to assess their impact on changes in DNA methylation (and corresponding gene expression) in a suite of genes within the HPA axis. We found that nestlings that experienced early life stress across both life-history periods had higher DNA methylation in a critical HPA axis gene, the glucocorticoid receptor (NR3C1). In addition, we found that the life-history stage when stress was encountered impacted some genes (HSD11B1, NR3C1 and NR3C2) differently. We also found evidence for the mitigation of parental stress by post-natal stress (in HSD11B1 and NR3C2). Finally, by assessing DNA methylation in both the brain and blood, we were able to evaluate cross-tissue patterns. While some differentially methylated regions were tissue-specific, we found cross-tissue changes in NR3C2 and NR3C1, suggesting that blood is a suitable tissue for assessing DNA methylation as a biomarker of early life stress. Our results provide a crucial first step in understanding the mechanisms by which early life stress in different life-history periods contributes to changes in the epigenome of the HPA axis.
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Affiliation(s)
- Stefanie J Siller Wilks
- Department of Ecology Evolution and Environmental Biology, Columbia University, New York, New York, USA
| | - Britt J Heidinger
- Biological Sciences Department, North Dakota State University, Fargo, North Dakota, USA
| | - David F Westneat
- Department of Biology, University of Kentucky, Lexington, Kentucky, USA
| | - Joseph Solomon
- Department of Ecology Evolution and Environmental Biology, Columbia University, New York, New York, USA
| | - Dustin R Rubenstein
- Department of Ecology Evolution and Environmental Biology, Columbia University, New York, New York, USA
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Menor-Campos DJ. Ethical Concerns about Fashionable Dog Breeding. Animals (Basel) 2024; 14:756. [PMID: 38473141 DOI: 10.3390/ani14050756] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 02/20/2024] [Accepted: 02/26/2024] [Indexed: 03/14/2024] Open
Abstract
The historical relationship between humans and dogs has involved selective breeding for various purposes, such as hunting, guarding, and service roles. However, over time, there has been a shift in preferences from functionality to aesthetics, which has influenced the diverse sizes, shapes, and coats of dog breeds. This review looks at fashionable dog breeding and questions the ethics of prioritising looks over health and behaviour. It aims to alert potential owners, breeders, and regulators to the importance of considering a dog's overall well-being, not just its appearance, which has resulted in fad breeding, leading to genetic disorders, health issues, and a loss of biodiversity. Ethical concerns arise from breeding brachycephalic breeds with respiratory conditions, inbreeding causing inherited disorders, and overbreeding popular breeds while shelter dogs remain unadopted. Additionally, the impact of cosmetic surgeries on popular dog breeds, as well as the neglect of behavioural traits in favour of physical characteristics and strict breeding practices are also considered. The current breeding model can have a negative impact on the emotional and cognitive well-being of dogs, resulting in issues such as aggression, anxiety, and other behavioural problems that can significantly reduce their overall quality of life. Unregulated breeding practices and the demand for rare breeds can lead to illegal breeding, compromising animal welfare. Prospective owners, veterinarians, kennel clubs, and legislators all need to play a responsible role in protecting animals.
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Affiliation(s)
- David J Menor-Campos
- Departamento de Medicina y Cirugía Animal, Universidad de Córdoba, 14005 Córdoba, Spain
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Dupont SM, Barbraud C, Chastel O, Delord K, Pallud M, Parenteau C, Weimerskirch H, Angelier F. How does maternal age influence reproductive performance and offspring phenotype in the snow petrel (Pagodroma nivea)? Oecologia 2023; 203:63-78. [PMID: 37833549 DOI: 10.1007/s00442-023-05451-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/03/2023] [Accepted: 09/11/2023] [Indexed: 10/15/2023]
Abstract
In wild vertebrates, the increase of breeding success with advancing age has been extensively studied through laying date, clutch size, hatching success, and fledging success. However, to better evaluate the influence of age on reproductive performance in species with high reproductive success, assessing not only reproductive success but also other proxies of reproductive performance appear crucial. For example, the quality of developmental conditions and offspring phenotype can provide robust and complementary information on reproductive performance. In long-lived vertebrate species, several proxies of developmental conditions can be used to estimate the quality of the produced offspring (i.e., body size, body condition, corticosterone levels, and telomere length), and therefore, their probability to survive. By sampling chicks reared by known-aged mothers, we investigated the influence of maternal age on reproductive performance and offspring quality in a long-lived bird species, the snow petrel (Pagodroma nivea). Older females bred and left their chick alone earlier. Moreover, older females had larger chicks that grew faster, and ultimately, those chicks had a higher survival probability at the nest. In addition, older mothers produced chicks with a higher sensitivity to stress, as shown by moderately higher stress-induced corticosterone levels. Overall, our study demonstrated that maternal age is correlated to reproductive performance (hatching date, duration of the guarding period and survival) and offspring quality (body size, growth rate and sensitivity to stress), suggesting that older individuals provide better parental cares to their offspring. These results also demonstrate that maternal age can affect the offspring phenotype with potential long-term consequences.
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Affiliation(s)
- Sophie M Dupont
- Laboratoire de Biologie des Organismes et des Ecosystèmes Aquatiques (BOREA), MNHN, CNRS UMR8067, SU, IRD207, UCN, UA, 97275, Schoelcher Cedex, Martinique, France.
- Institut du Littoral, Environnement et Sociétés (LIENSs), CNRS UMR7266, La Rochelle Université, 17000, La Rochelle, France.
| | - Christophe Barbraud
- Centre d'Etudes Biologiques de Chizé (CEBC), CNRS UMR7372, La Rochelle Université, 79360, Villiers-en-Bois, France
| | - Olivier Chastel
- Centre d'Etudes Biologiques de Chizé (CEBC), CNRS UMR7372, La Rochelle Université, 79360, Villiers-en-Bois, France
| | - Karine Delord
- Centre d'Etudes Biologiques de Chizé (CEBC), CNRS UMR7372, La Rochelle Université, 79360, Villiers-en-Bois, France
| | - Marie Pallud
- Centre d'Etudes Biologiques de Chizé (CEBC), CNRS UMR7372, La Rochelle Université, 79360, Villiers-en-Bois, France
| | - Charline Parenteau
- Centre d'Etudes Biologiques de Chizé (CEBC), CNRS UMR7372, La Rochelle Université, 79360, Villiers-en-Bois, France
| | - Henri Weimerskirch
- Centre d'Etudes Biologiques de Chizé (CEBC), CNRS UMR7372, La Rochelle Université, 79360, Villiers-en-Bois, France
| | - Frédéric Angelier
- Centre d'Etudes Biologiques de Chizé (CEBC), CNRS UMR7372, La Rochelle Université, 79360, Villiers-en-Bois, France
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Angelier F, Wingfield JC, Barbraud C, Parenteau C, Trouvé C, Chastel O. Ontogeny and individual heterogeneity of the corticosterone stress response in a wild altricial seabird, the snow petrel (Pagodroma nivea). Front Ecol Evol 2022. [DOI: 10.3389/fevo.2022.902202] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
In the current context of global change, there is evidence of a large inter-individual variability in the way animals physiologically respond to anthropogenic changes. In that context, the Hypothalamus-Pituitary-Adrenal (HPA) axis and the corticosterone stress response are of primary importance because they are thought to govern the ability of individuals to adjust to stress. Several studies have reported that this stress response is variable among adults and they have successfully linked this variability with abiotic and biotic factors. However, the inter-individual variability of the glucocorticoid stress response has rarely been examined during the developmental phase in wild vertebrates, and its potential ecological determinants remain unclear. In this study, we examined the ontogeny of the corticosterone stress response in an altricial seabird species (i.e., how corticosterone levels increase in response to a standardized stress protocol), the Snow petrel. We reported a strong heterogeneity of the corticosterone stress response at all ages in snow petrel chicks (11-, 20-, and 37-days old chicks). Although the magnitude of this corticosterone stress response decreases with the age of the chick, we also found that this corticosterone stress response was repeatable throughout the post-hatching developmental period (repeatability: r > 0.50 for stress-induced corticosterone levels after a 30-min restraint). Importantly, this glucocorticoid stress response was negatively associated with the body condition of the chicks (i.e., mass corrected for body size), and previous exposure to sampling was associated with a dampened corticosterone stress response. However, we did not find any link between parental traits (parental condition or parental corticosterone stress response), nest quality, hatching date, and the chick’s corticosterone stress response. Our study suggests that the corticosterone stress response is a consistent individual trait that is affected to some extent by post-natal conditions, and which differs among individuals very early in life.
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Zimmer C, Woods HA, Martin LB. Information theory in vertebrate stress physiology. Trends Endocrinol Metab 2022; 33:8-17. [PMID: 34750063 DOI: 10.1016/j.tem.2021.10.001] [Citation(s) in RCA: 13] [Impact Index Per Article: 6.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/01/2021] [Revised: 10/01/2021] [Accepted: 10/09/2021] [Indexed: 11/21/2022]
Abstract
Information theory has been applied productively across biology, but it has been used minimally in endocrinology. Here, we advocate for the integration of information theory into stress endocrinology. Presently, the majority of models of stress center on the regulation of hormone concentrations, even though what interests most endocrinologists and matters in terms of individual health and evolutionary fitness is the information content of hormones. In neuroscience, the free energy principle, a concept offered to explain how the brain infers current and future states of the environment, could be a guide for resolving how information is instantiated in hormones such as the glucocorticoids. Here, we offer several ideas and promising options for research addressing how hormones encode and cells respond to information in glucocorticoids.
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Affiliation(s)
- Cedric Zimmer
- Global Health and Infectious Disease Research Center, University of South Florida, FL 33612, USA; Laboratoire d'Ethologie Expérimentale et Comparée, LEEC, UR 4443, Université Sorbonne Paris Nord, 93430, Villetaneuse, France.
| | - H Arthur Woods
- University of Montana, Division of Biological Sciences, Missoula, MT 59812, USA
| | - Lynn B Martin
- Global Health and Infectious Disease Research Center, University of South Florida, FL 33612, USA
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9
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No trans-generational maternal effects of early-life corticosterone exposure on neophobia and antipredator behaviour in the house sparrow. J ETHOL 2021. [DOI: 10.1007/s10164-021-00712-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/21/2022]
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10
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Westrick SE, van Kesteren F, Boutin S, Lane JE, McAdam AG, Dantzer B. Maternal glucocorticoids have minimal effects on HPA axis activity and behavior of juvenile wild North American red squirrels. J Exp Biol 2021; 224:jeb.236620. [PMID: 33795416 DOI: 10.1242/jeb.236620] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/02/2020] [Accepted: 03/29/2021] [Indexed: 12/27/2022]
Abstract
As a response to environmental cues, maternal glucocorticoids (GCs) may trigger adaptive developmental plasticity in the physiology and behavior of offspring. In North American red squirrels (Tamiasciurus hudsonicus), mothers exhibit increased GCs when conspecific density is elevated, and selection favors more aggressive and perhaps more active mothers under these conditions. We tested the hypothesis that elevated maternal GCs cause shifts in offspring behavior that may prepare them for high-density conditions. We experimentally elevated maternal GCs during gestation or early lactation. We measured two behavioral traits (activity and aggression) in weaned offspring using standardized behavioral assays. Because maternal GCs may influence offspring hypothalamic-pituitary-adrenal (HPA) axis dynamics, which may in turn affect behavior, we also measured the impact of our treatments on offspring HPA axis dynamics (adrenal reactivity and negative feedback), and the association between offspring HPA axis dynamics and behavior. Increased maternal GCs during lactation, but not gestation, slightly elevated activity levels in offspring. Offspring aggression and adrenal reactivity did not differ between treatment groups. Male, but not female, offspring from mothers treated with GCs during pregnancy exhibited stronger negative feedback compared with those from control mothers, but there were no differences in negative feedback between lactation treatment groups. Offspring with higher adrenal reactivity from mothers treated during pregnancy (both controls and GC-treated) exhibited lower aggression and activity. These results suggest that maternal GCs during gestation or early lactation alone may not be a sufficient cue to produce substantial changes in behavioral and physiological stress responses in offspring in natural populations.
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Affiliation(s)
- Sarah E Westrick
- Department of Psychology, University of Michigan, Ann Arbor, MI48109-1043, USA
| | - Freya van Kesteren
- Department of Psychology, University of Michigan, Ann Arbor, MI48109-1043, USA
| | - Stan Boutin
- Department of Biological Sciences, University of Alberta, Edmonton, AB, Canada, T6G 2E9
| | - Jeffrey E Lane
- Department of Biology, University of Saskatchewan, Saskatoon, SK, Canada, S7N 5E2
| | - Andrew G McAdam
- Ecology and Evolutionary Biology, University of Colorado, Boulder, CO 80309-0334, USA
| | - Ben Dantzer
- Department of Psychology, University of Michigan, Ann Arbor, MI48109-1043, USA.,Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109-1085, USA
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Carr JA, Harris BN. The role of ecological tradeoffs in the evolution of endocrine function. Gen Comp Endocrinol 2020; 295:113509. [PMID: 32464139 DOI: 10.1016/j.ygcen.2020.113509] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/30/2022]
Affiliation(s)
- James A Carr
- Department of Biological Sciences, Texas Tech University, United States.
| | - Breanna N Harris
- Department of Biological Sciences, Texas Tech University, United States
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