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MacLeod KJ, English S, Ruuskanen SK, Taborsky B. Stress in the social context: a behavioural and eco-evolutionary perspective. J Exp Biol 2023; 226:jeb245829. [PMID: 37529973 PMCID: PMC10445731 DOI: 10.1242/jeb.245829] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/03/2023]
Abstract
The social environment is one of the primary sources of challenging stimuli that can induce a stress response in animals. It comprises both short-term and stable interactions among conspecifics (including unrelated individuals, mates, potential mates and kin). Social stress is of unique interest in the field of stress research because (1) the social domain is arguably the most complex and fluctuating component of an animal's environment; (2) stress is socially transmissible; and (3) stress can be buffered by social partners. Thus, social interactions can be both the cause and cure of stress. Here, we review the history of social stress research, and discuss social stressors and their effects on organisms across early life and adulthood. We also consider cross-generational effects. We discuss the physiological mechanisms underpinning social stressors and stress responses, as well as the potential adaptive value of responses to social stressors. Finally, we identify outstanding challenges in social stress research, and propose a framework for addressing these in future work.
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Affiliation(s)
| | - Sinead English
- School of Biological Sciences, University of Bristol, Bristol, BS8 1TQ, UK
| | - Suvi K. Ruuskanen
- Department of Biological and Environmental Science, University of Jyväskylä, Survontie 9 C, FI-40014, Finland
- Department of Biology, University of Turku, Turku, FI-20014, Finland
| | - Barbara Taborsky
- Division of Behavioural Biology, Institute of Ecology and Evolution, University of Bern, 3012 Bern, Switzerland
- Institute for Advanced Study, 14193 Berlin, Germany
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2
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Levell ST, Bedgood SA, Travis J. Plastic maternal effects of social density on reproduction and fitness in the least killifish, Heterandria formosa. Ecol Evol 2023; 13:e10074. [PMID: 37214609 PMCID: PMC10196423 DOI: 10.1002/ece3.10074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2022] [Revised: 04/13/2023] [Accepted: 04/21/2023] [Indexed: 05/24/2023] Open
Abstract
Environmental parental effects, also known as transgenerational plasticity, are widespread in plants and animals. Less well known is whether those effects contribute to maternal fitness in the same manner in different populations. We carried out a multigenerational laboratory experiment with females drawn from two populations of the least killifish, Heterandria formosa, to assess transgenerational plasticity in reproductive traits in response to differences in social density and its effects on maternal fitness. In the first and second generations, increased density decreased reproductive rate and increased offspring size in females from both populations. There were complicated patterns of transgenerational plasticity on maternal fitness that differed between females from different populations. Females from a population with historically low densities whose mothers experienced lower density had higher fitness than females whose mothers experienced higher density, regardless of their own density. The opposite pattern emerged in females from the population with historically high densities: Females whose mothers experienced higher density had higher fitness than females whose mothers experienced lower density. This transgenerational plasticity is not anticipatory but might be considered adaptive in both populations if providing those "silver spoons" enhances offspring fitness in all environments.
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Affiliation(s)
| | - Samuel A. Bedgood
- Department of Integrative BiologyOregon State UniversityCorvallisOregonUSA
| | - Joseph Travis
- Department of Biological ScienceFlorida State UniversityTallahasseeFloridaUSA
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3
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Kim SY, Chiara V, Álvarez-Quintero N, Velando A. Mitochondrial DNA content in eggs as a maternal effect. Proc Biol Sci 2022; 289:20212100. [PMID: 35042411 PMCID: PMC8767187 DOI: 10.1098/rspb.2021.2100] [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: 09/22/2021] [Accepted: 12/13/2021] [Indexed: 01/28/2023] Open
Abstract
The transmission of detrimental mutations in animal mitochondrial DNA (mtDNA) to the next generation is avoided by a high level of mtDNA content in mature oocytes. Thus, this maternal genetic material has the potential to mediate adaptive maternal effects if mothers change mtDNA level in oocytes in response to their environment or body condition. Here, we show that increased mtDNA abundance in mature oocytes was associated with fast somatic growth during early development but at the cost of increased mortality in three-spined sticklebacks. We also examined whether oocyte mtDNA and sperm DNA damage levels have interacting effects because they can determine the integrity of mitochondrial and nuclear genes in offspring. The level of oxidative DNA damage in sperm negatively affected fertility, but there was no interacting effect of oocyte mtDNA abundance and sperm DNA damage. Oocyte mtDNA level increased towards the end of the breeding season, and the females exposed to warmer temperatures during winter produced eggs with increased mtDNA copies. Our results suggest that oocyte mtDNA level can vary according to the expected energy demands for offspring during embryogenesis and early growth. Thus, mothers can affect offspring development and viability through the context-dependent effects of oocyte mtDNA abundance.
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Affiliation(s)
- Sin-Yeon Kim
- Grupo Ecoloxía Animal, Torre CACTI, Centro de Investigación Mariña, Universidade de Vigo, 36310 Vigo, Spain
| | - Violette Chiara
- Grupo Ecoloxía Animal, Torre CACTI, Centro de Investigación Mariña, Universidade de Vigo, 36310 Vigo, Spain
| | - Náyade Álvarez-Quintero
- Grupo Ecoloxía Animal, Torre CACTI, Centro de Investigación Mariña, Universidade de Vigo, 36310 Vigo, Spain
| | - Alberto Velando
- Grupo Ecoloxía Animal, Torre CACTI, Centro de Investigación Mariña, Universidade de Vigo, 36310 Vigo, Spain
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4
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Perez MF, Shamalnasab M, Mata-Cabana A, Della Valle S, Olmedo M, Francesconi M, Lehner B. Neuronal perception of the social environment generates an inherited memory that controls the development and generation time of C. elegans. Curr Biol 2021; 31:4256-4268.e7. [PMID: 34358445 DOI: 10.1016/j.cub.2021.07.031] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/05/2021] [Revised: 06/29/2021] [Accepted: 07/13/2021] [Indexed: 12/31/2022]
Abstract
An old and controversial question in biology is whether information perceived by the nervous system of an animal can "cross the Weismann barrier" to alter the phenotypes and fitness of their progeny. Here, we show that such intergenerational transmission of sensory information occurs in the model organism, C. elegans, with a major effect on fitness. Specifically, that perception of social pheromones by chemosensory neurons controls the post-embryonic timing of the development of one tissue, the germline, relative to others in the progeny of an animal. Neuronal perception of the social environment thus intergenerationally controls the generation time of this animal.
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Affiliation(s)
- Marcos Francisco Perez
- Systems Biology Program, Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, Barcelona 08003, Spain
| | - Mehrnaz Shamalnasab
- Université de Lyon, ENS de Lyon, Université de Claude Bernard, CNRS UMR 5239, INSERM U1210, Laboratory of Biology and Modelling of the Cell, 46 Allée d'Italie, Site Jacques Monod, 69007 Lyon, France
| | - Alejandro Mata-Cabana
- Departamento de Genética, Facultad de Biología, Universidad de Sevilla, Seville, Spain
| | - Simona Della Valle
- Systems Biology Program, Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, Barcelona 08003, Spain
| | - María Olmedo
- Departamento de Genética, Facultad de Biología, Universidad de Sevilla, Seville, Spain
| | - Mirko Francesconi
- Université de Lyon, ENS de Lyon, Université de Claude Bernard, CNRS UMR 5239, INSERM U1210, Laboratory of Biology and Modelling of the Cell, 46 Allée d'Italie, Site Jacques Monod, 69007 Lyon, France.
| | - Ben Lehner
- Systems Biology Program, Centre for Genomic Regulation (CRG), The Barcelona Institute of Science and Technology, Dr. Aiguader 88, Barcelona 08003, Spain; Universitat Pompeu Fabra (UPF), Barcelona, Spain; Institució Catalana de Recerca i Estudis Avançats (ICREA), Pg. Lluis Companys 23, Barcelona 08010, Spain.
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5
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Rousseau K, Prunet P, Dufour S. Special features of neuroendocrine interactions between stress and reproduction in teleosts. Gen Comp Endocrinol 2021; 300:113634. [PMID: 33045232 DOI: 10.1016/j.ygcen.2020.113634] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/25/2020] [Revised: 09/10/2020] [Accepted: 09/20/2020] [Indexed: 02/08/2023]
Abstract
Stress and reproduction are both essential functions for vertebrate survival, ensuring on one side adaptative responses to environmental changes and potential life threats, and on the other side production of progeny. With more than 25,000 species, teleosts constitute the largest group of extant vertebrates, and exhibit a large diversity of life cycles, environmental conditions and regulatory processes. Interactions between stress and reproduction are a growing concern both for conservation of fish biodiversity in the frame of global changes and for the development of sustainability of aquaculture including fish welfare. In teleosts, as in other vertebrates, adverse effects of stress on reproduction have been largely documented and will be shortly overviewed. Unexpectedly, stress notably via cortisol, may also facilitate reproductive function in some teleost species in relation to their peculiar life cyles and this review will provide some examples. Our review will then mainly address the neuroendocrine axes involved in the control of stress and reproduction, namely the corticotropic and gonadotropic axes, as well as their interactions. After reporting some anatomo-functional specificities of the neuroendocrine systems in teleosts, we will describe the major actors of the corticotropic and gonadotropic axes at the brain-pituitary-peripheral glands (interrenals and gonads) levels, with a special focus on the impact of teleost-specific whole genome duplication (3R) on the number of paralogs and their potential differential functions. We will finally review the current knowledge on the neuroendocrine mechanisms of the various interactions between stress and reproduction at different levels of the two axes in teleosts in a comparative and evolutionary perspective.
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Affiliation(s)
- Karine Rousseau
- Muséum National d'Histoire Naturelle, Research Unit BOREA, Biology of Aquatic Organisms and Ecosystems, CNRS, IRD, SU, UCN, UA, Paris, France
| | - Patrick Prunet
- INRAE, UR1037, Laboratoire de Physiologie et de Génomique des Poissons (LPGP), Rennes, France
| | - Sylvie Dufour
- Muséum National d'Histoire Naturelle, Research Unit BOREA, Biology of Aquatic Organisms and Ecosystems, CNRS, IRD, SU, UCN, UA, Paris, France.
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6
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Vortkamp I, Barraquand F, Hilker FM. Ecological Allee effects modulate optimal strategies for conservation in agricultural landscapes. Ecol Modell 2020. [DOI: 10.1016/j.ecolmodel.2020.109208] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
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7
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Sau A, Saha B, Bhattacharya S. An extended stochastic Allee model with harvesting and the risk of extinction of the herring population. J Theor Biol 2020; 503:110375. [PMID: 32593680 DOI: 10.1016/j.jtbi.2020.110375] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2019] [Revised: 06/10/2020] [Accepted: 06/12/2020] [Indexed: 11/28/2022]
Abstract
Overexploitation of commercially beneficial fish is a serious ecological problem around the world. The growth profiles of most of the species are likely to follow density regulated theta-logistic model irrespective of any taxonomy group [Sibly et al., Science, 2005]. Rapid depletion of population size may cause reduced fitness, and the species is exposed to Allee phenomena. Here sustainability is addressed by modelling the herring population as a stochastic process and computing the probability of extinction and expected time to extinction. The models incorporate an Allee effect, crowding effect which reduce birth and death rates at large populations, and two possible choices of harvesting models viz. linear harvesting and nonlinear harvesting. A seminal attempt is made by Saha [Saha et al., Ecol. Model, 2013] for this economically beneficial fish, but ignored the vital phenomena of harvesting. Moreover, in this model, the demographic stochasticity is introduced through the white-noise term, which has certain limitations when harvesting is introduced into the system. White noise is appropriate for such a system where immigration and emigration are allowed, but a harvesting model is rational for a closed system. The demographic stochasticity is introduced by replacing an ordinary differential equation model with a stochastic differential equation model, where the instantaneous variance in the SDE is derived directly from the birth and death rates of a birth-death process. The modelling parameters are fit to data of the herring populations collected from Global Population Dynamics Database (GPDD), and the risk of extinction of each population is computed under different harvesting protocols. A threshold for handling times is computed beneath which the risk of extinction is high. This is proposed as a recommendation to management for sustainable harvesting.
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Affiliation(s)
- Anurag Sau
- Agricultural and Ecological Research Unit, Indian Statistical Institute, 203, B.T Road, Kolkata 700108, India
| | - Bapi Saha
- Govt. College of Engg. & Textile Technology, Berhampore, 4 Cantonment Road, PIN-742101, India
| | - Sabyasachi Bhattacharya
- Agricultural and Ecological Research Unit, Indian Statistical Institute, 203, B.T Road, Kolkata 700108, India.
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8
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Wassink L, Huerta B, Li W, Scribner K. Interaction of egg cortisol and offspring experience influences stress-related behaviour and physiology in lake sturgeon. Anim Behav 2020. [DOI: 10.1016/j.anbehav.2020.01.001] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023]
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9
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Horváth G, Rodríguez‐Ruiz G, Martín J, López P, Herczeg G. Maternal diet affects juvenile Carpetan rock lizard performance and personality. Ecol Evol 2019; 9:14476-14488. [PMID: 31938534 PMCID: PMC6953655 DOI: 10.1002/ece3.5882] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Revised: 10/14/2019] [Accepted: 11/03/2019] [Indexed: 11/07/2022] Open
Abstract
Differences in both stable and labile state variables are known to affect the emergence and maintenance of consistent interindividual behavioral variation (animal personality or behavioral syndrome), especially when experienced early in life. Variation in environmental conditions experienced by gestating mothers (viz. nongenetic maternal effects) is known to have significant impact on offspring condition and behavior; yet, their effect on behavioral consistency is not clear. Here, by applying an orthogonal experimental design, we aimed to study whether increased vitamin D3 content in maternal diet during gestation (vitamin-supplemented vs. vitamin control treatments) combined with corticosterone treatment (corticosterone-treated vs. corticosterone control treatments) applied on freshly hatched juveniles had an effect on individual state and behavioral consistency of juvenile Carpetan rock lizards (Iberolacerta cyreni). We tested the effect of our treatments on (a) climbing speed and the following levels of behavioral variation, (b) strength of animal personality (behavioral repeatability), (c) behavioral type (individual mean behavior), and (d) behavioral predictability (within-individual behavioral variation unrelated to environmental change). We found higher locomotor performance of juveniles from the vitamin-supplemented group (42.4% increase), irrespective of corticosterone treatment. While activity personality was present in all treatments, shelter use personality was present only in the vitamin-supplemented × corticosterone-treated treatment and risk-taking personality was present in corticosterone control treatments. Contrary to our expectations, behavioral type was not affected by our treatments, indicating that individual quality can affect behavioral strategies without affecting group-level mean behavior. Behavioral predictability decreased in individuals with low climbing speed, which could be interpreted as a form of antipredator strategy. Our results clearly demonstrate that maternal diet and corticosterone treatment have the potential to induce or hamper between-individual variation in different components of boldness, often in interactions.
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Affiliation(s)
- Gergely Horváth
- Behavioural Ecology GroupDepartment of Systematic Zoology and EcologyEötvös Loránd UniversityBudapestHungary
| | | | - José Martín
- Department of Evolutionary EcologyMuseo Nacional de Ciencias NaturalesCSICMadridSpain
| | - Pilar López
- Department of Evolutionary EcologyMuseo Nacional de Ciencias NaturalesCSICMadridSpain
| | - Gábor Herczeg
- Behavioural Ecology GroupDepartment of Systematic Zoology and EcologyEötvös Loránd UniversityBudapestHungary
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10
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Köhnke M, Malchow H. Wave pinning in competition-diffusion models in variable environments. J Theor Biol 2019; 461:204-214. [DOI: 10.1016/j.jtbi.2018.10.048] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/22/2018] [Revised: 09/05/2018] [Accepted: 10/24/2018] [Indexed: 11/25/2022]
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11
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Rozen-Rechels D, Dupoué A, Meylan S, Decencière B, Guingand S, Le Galliard JF. Water restriction in viviparous lizards causes transgenerational effects on behavioral anxiety and immediate effects on exploration behavior. Behav Ecol Sociobiol 2018. [DOI: 10.1007/s00265-018-2443-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
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12
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Polich RL, Bodensteiner BL, Adams CIM, Janzen FJ. Effects of augmented corticosterone in painted turtle eggs on offspring development and behavior. Physiol Behav 2018; 183:1-9. [PMID: 29031544 DOI: 10.1016/j.physbeh.2017.10.004] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2017] [Revised: 08/31/2017] [Accepted: 10/04/2017] [Indexed: 01/09/2023]
Abstract
Maternal stressors can play an integral role in offspring development and ultimate behaviors in many vertebrates. Increased circulating stress avoidance hormones can be reflected in elevated concentrations in ova, thus providing a potential mechanism for maternal stress to be transmitted to offspring even in taxa without parental care. In this study, we assessed the potential impacts of augmented stress avoidance hormones on offspring development and anti-predator behaviors in a freshwater turtle, Chrysemys picta. We exposed C. picta eggs to biologically relevant amounts of the stress avoidance hormone, corticosterone, as a proxy for maternal stressors. We allowed the eggs to incubate in the field, then measured offspring phenotypes, conducted performance trials, and simulated nest emergence in a field experiment. Exogenous corticosterone reduced survivorship to hatch, but did not affect incubation duration, offspring size, overwinter survival, or size after hibernation. In performance trials, this hormone treatment reduced the frequency of righting, yet enhanced the righting speed of neonates. Regardless, these performance differences did not detectably alter survivorship in the nest emergence experiment. These results lend insight into the potential effects of maternal stress levels on offspring phenotypes, as well as the robustness of offspring fitness to altered levels of maternal stress in freshwater turtles.
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Affiliation(s)
- Rebecca L Polich
- Department of Human Physiology, Gonzaga University, Spokane, WA, USA.
| | - Brooke L Bodensteiner
- Department of Biological Sciences, Virginia Polytechnic University and State University, Blacksburg, VA, USA.
| | - Clare I M Adams
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA, USA.
| | - Fredric J Janzen
- Department of Ecology, Evolution, and Organismal Biology, Iowa State University, Ames, IA, USA.
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13
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Effects of maternal cortisol treatment on offspring size, responses to stress, and anxiety-related behavior in wild largemouth bass (Micropterus salmoides). Physiol Behav 2017; 180:15-24. [PMID: 28782525 DOI: 10.1016/j.physbeh.2017.08.001] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/09/2017] [Revised: 08/02/2017] [Accepted: 08/02/2017] [Indexed: 01/19/2023]
Abstract
Cortisol, the main glucocorticoid stress hormone in teleost fish, is of interest as a mediator of maternal stress on offspring characteristics because it plays an organizational role during early development. The present study tested the hypothesis that maternal exposure to cortisol treatment prior to spawn affects offspring phenotype using wild largemouth bass (Micropterus salmoides). Baseline and stress-induced cortisol concentrations, body size (i.e. length and mass), and behavior (i.e. anxiety, exploration, boldness, and aggression) were assessed at different offspring life-stages and compared between offspring of control and cortisol-treated females. Cortisol administration did not affect spawning success or timing, nor were whole-body cortisol concentrations different between embryos from cortisol-treated and control females. However, maternal cortisol treatment had significant effects on offspring stress responsiveness, mass, and behavior. Compared to offspring of control females, offspring of cortisol-treated females exhibited larger mass right after hatch, and young-of-the-year mounted an attenuated cortisol response to an acute stressor, and exhibited less thigmotaxic anxiety, exploratory behavior, boldness and aggression. Thus, offspring phenotype was affected by elevated maternal cortisol levels despite the absence of a significant increase in embryo cortisol concentrations, suggesting that a mechanism other than the direct deposition of cortisol into eggs mediates effects on offspring. The results of the present raise questions about the mechanisms through which maternal stress influences offspring behavior and physiology, as well as the impacts of such phenotypic changes on offspring fitness.
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14
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Wang Y, Li S, Zeng Z, Liang L, Du W. Maternal food availability affects offspring performance and survival in a viviparous lizard. Funct Ecol 2017. [DOI: 10.1111/1365-2435.12903] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022]
Affiliation(s)
- Yang Wang
- Key Laboratory of Animal Ecology and Conservation Biology Institute of Zoology Chinese Academy of Sciences Beijing100101 China
- University of Chinese Academy of Science Beijing China
| | - Shu‐Ran Li
- Key Laboratory of Animal Ecology and Conservation Biology Institute of Zoology Chinese Academy of Sciences Beijing100101 China
- University of Chinese Academy of Science Beijing China
| | - Zhi‐Gao Zeng
- Key Laboratory of Animal Ecology and Conservation Biology Institute of Zoology Chinese Academy of Sciences Beijing100101 China
| | - Liang Liang
- Key Laboratory of Animal Ecology and Conservation Biology Institute of Zoology Chinese Academy of Sciences Beijing100101 China
- University of Chinese Academy of Science Beijing China
| | - Wei‐Guo Du
- Key Laboratory of Animal Ecology and Conservation Biology Institute of Zoology Chinese Academy of Sciences Beijing100101 China
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15
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Guida L, Awruch C, Walker TI, Reina RD. Prenatal stress from trawl capture affects mothers and neonates: a case study using the southern fiddler ray (Trygonorrhina dumerilii). Sci Rep 2017; 7:46300. [PMID: 28401959 PMCID: PMC5388872 DOI: 10.1038/srep46300] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2016] [Accepted: 03/14/2017] [Indexed: 12/14/2022] Open
Abstract
Assessing fishing effects on chondrichthyan populations has predominantly focused on quantifying mortality rates. Consequently, sub-lethal effects of capture stress on the reproductive capacity of chondrichthyans are largely unknown. We investigated the reproductive consequences of capture on pregnant southern fiddler rays (Trygonorrhina dumerilii) collected from Swan Bay, Australia, in response to laboratory-simulated trawl capture (8 h) followed immediately by air exposure (30 min). Immediately prior to, and for up to 28 days post trawling, all females were measured for body mass (BM), sex steroid concentrations (17-β estradiol, progesterone, testosterone) and granulocyte to lymphocyte (G:L) ratio. At parturition, neonates were measured for total length (TL), BM and G:L ratio. Trawling reduced maternal BM and elevated the G:L ratio for up to 28 days. Trawling did not significantly affect any sex steroid concentrations relative to controls. Neonates from trawled mothers were significantly lower in BM and TL than control animals, and had an elevated G:L ratio. Our results show that capture of pregnant T. dumerilii can influence their reproductive potential and affect the fitness of neonates. We suggest other viviparous species are likely to be similarly affected. Sub-lethal effects of capture, particularly on reproduction, require further study to improve fisheries management and conservation of chondrichthyans.
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Affiliation(s)
- L Guida
- School of Biological Sciences, Monash University, Clayton, Victoria 3800, Australia
| | - C Awruch
- CESIMAR (Centro Para el Estudio de Sistemas Marinos) - CENPAT- CONICET, Puerto Madryn, Chubut U9120ACD, Argentina.,School of Biological Sciences, University of Tasmania, Hobart, Tasmania 7001, Australia
| | - T I Walker
- School of Biological Sciences, Monash University, Clayton, Victoria 3800, Australia
| | - R D Reina
- School of Biological Sciences, Monash University, Clayton, Victoria 3800, Australia
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16
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Belanger C, Peiman K, Vera-Chang M, Moon T, Cooke S. Pumpkinseed sunfish ( Lepomis gibbosus) from littoral and limnetic habitats differ in stress responsiveness independent of environmental complexity and presence of conspecifics. CAN J ZOOL 2017. [DOI: 10.1139/cjz-2016-0202] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
In the face of a changing world, there has been increasing interest in the behavioural and physiological responses of wild animals to stressors. Many factors can influence stress responsiveness, but two that have not been extensively studied during the stress-induced phase are environmental complexity and the presence of conspecifics. Using wild pumpkinseed sunfish (Lepomis gibbosus (L., 1758)) collected from limnetic and littoral sites, we tested whether glucose and cortisol were affected by environmental complexity and the density of conspecifics during the period of maximum response following a standardized air stressor. Overall, environmental complexity and conspecific density did not have a significant effect on maximum stress. However, in the environmental complexity experiment, fish collected from the littoral site had significantly higher concentrations of maximum glucose and cortisol, and tended to have higher glucose and cortisol responsiveness, than limnetic fish. This indicates that although the collection site did not affect a fish’s baseline values, intraspecific variation in site use is associated with divergent sensitivity of the hypothalamic–pituitary–interrenal axis to stressors. The importance of capture location on maximal response from stressors represents a potential sampling bias and source of variation, and may be even more pronounced in species that are habitat specialists.
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Affiliation(s)
- C.B. Belanger
- Fish Ecology and Conservation Physiology Laboratory, Department of Biology and Institute of Environmental Science, Carleton University, 1125 Colonel By Drive, Ottawa, ON K1S 5B6, Canada
| | - K.S. Peiman
- Fish Ecology and Conservation Physiology Laboratory, Department of Biology and Institute of Environmental Science, Carleton University, 1125 Colonel By Drive, Ottawa, ON K1S 5B6, Canada
| | - M.N. Vera-Chang
- Department of Biology and Centre for Advanced Research in Environmental Genomics, University of Ottawa, Ottawa, ON K1N 6N5, Canada
| | - T.W. Moon
- Department of Biology and Centre for Advanced Research in Environmental Genomics, University of Ottawa, Ottawa, ON K1N 6N5, Canada
| | - S.J. Cooke
- Fish Ecology and Conservation Physiology Laboratory, Department of Biology and Institute of Environmental Science, Carleton University, 1125 Colonel By Drive, Ottawa, ON K1S 5B6, Canada
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17
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Capelle PM, Semeniuk CAD, Sopinka NM, Heath JW, Love OP. Prenatal Stress Exposure Generates Higher Early Survival and Smaller Size without Impacting Developmental Rate in a Pacific Salmon. ACTA ACUST UNITED AC 2017; 325:641-650. [PMID: 28101914 DOI: 10.1002/jez.2058] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2016] [Revised: 12/21/2016] [Accepted: 12/31/2016] [Indexed: 12/28/2022]
Abstract
Prenatal exposure to elevated glucocorticoids can act as a signal of environmental stress, resulting in modifications to offspring phenotype. While "negative" phenotypic effects (i.e., smaller size, slower growth) are often reported, recent research coupling phenotype with other fitness-related traits has suggested positive impacts of prenatal stress. Using captive Chinook salmon (Oncorhynchus tshawytscha), we treated eggs with biologically relevant cortisol levels-low (300 ng mL-1 ), high (1,000 ng mL-1 ), or control (0 ng mL-1 )-to examine the early-life impacts of maternally transferred stress hormones on offspring. Specifically, we measured early survival, rate of development, and multiple measures of morphology. Low and high cortisol dosing of eggs resulted in significantly higher survival compared to controls (37% and 24% higher, respectively). Fish reared from high dose eggs were structurally smaller compared to control fish, but despite this variation in structural size, exposure to elevated cortisol did not impact developmental rate. These results demonstrate that elevations in egg cortisol can positively influence offspring fitness through an increase in early survival while also altering phenotype at a critical life-history stage. Overall, these results suggest that exposure to prenatal stress may not always produce apparently negative impacts on offspring fitness and further proposes that complex phenotypic responses should be examined in relevant environmental conditions.
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Affiliation(s)
- Pauline M Capelle
- Department of Biological Sciences, University of Windsor, Windsor, Canada
| | - Christina A D Semeniuk
- Great Lakes Institute for Environmental Research, University of Windsor, Windsor, Canada
| | - Natalie M Sopinka
- Great Lakes Institute for Environmental Research, University of Windsor, Windsor, Canada
| | - John W Heath
- Yellow Island Aquaculture Ltd, Heriot Bay, BC, V0P 1H0, Canada
| | - Oliver P Love
- Department of Biological Sciences, University of Windsor, Windsor, Canada.,Great Lakes Institute for Environmental Research, University of Windsor, Windsor, Canada
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Sopinka NM, Capelle PM, Semeniuk CAD, Love OP. Glucocorticoids in Fish Eggs: Variation, Interactions with the Environment, and the Potential to Shape Offspring Fitness. Physiol Biochem Zool 2016; 90:15-33. [PMID: 28051944 DOI: 10.1086/689994] [Citation(s) in RCA: 34] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/04/2022]
Abstract
Wild and captive vertebrates face multiple stressors that all have the potential to induce chronic maternal stress (i.e., sustained, elevated plasma glucocorticoids), resulting in embryo exposure to elevated maternally derived glucocorticoids. In oviparous taxa such as fish, maternally derived glucocorticoids in eggs are known for their capacity to shape offspring phenotype. Using a variety of methodologies, scientists have quantified maternally derived levels of egg cortisol, the primary glucocorticoid in fishes, and examined the cascading effects of egg cortisol on progeny phenotype. Here we summarize and interpret the current state of knowledge on egg cortisol in fishes and the relationships linking maternal stress/state to egg cortisol and offspring phenotype/fitness. Considerable variation in levels of egg cortisol exists across species and among females within a species; this variation is hypothesized to be due to interspecific differences in reproductive life history and intraspecific differences in female condition. Outcomes of experimental studies manipulating egg cortisol vary both inter- and intraspecifically. Moreover, while exogenous elevation of egg cortisol (as a proxy for maternal stress) induces phenotypic changes commonly considered to be maladaptive (e.g., smaller offspring size), emerging work in other taxa suggests that there can be positive effects on fitness when the offspring's environment is taken into account. Investigations into (i) mechanisms by which egg cortisol elicits phenotypic change in offspring (e.g., epigenetics), (ii) maternal and offspring buffering capacity of cortisol, and (iii) factors driving natural variation in egg cortisol and how this variation affects offspring phenotype and fitness are all germane to discussions on egg glucocorticoids as signals of maternal stress.
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19
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Taylor JJ, Sopinka NM, Wilson SM, Hinch SG, Patterson DA, Cooke SJ, Willmore WG. Examining the relationships between egg cortisol and oxidative stress in developing wild sockeye salmon (Oncorhynchus nerka). Comp Biochem Physiol A Mol Integr Physiol 2016; 200:87-93. [DOI: 10.1016/j.cbpa.2016.06.012] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/05/2015] [Revised: 06/03/2016] [Accepted: 06/08/2016] [Indexed: 02/02/2023]
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20
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Siviter H, Charles Deeming D, Rosenberger J, Burman OHP, Moszuti SA, Wilkinson A. The impact of egg incubation temperature on the personality of oviparous reptiles. Anim Cogn 2016; 20:109-116. [PMID: 27599495 PMCID: PMC5274644 DOI: 10.1007/s10071-016-1030-1] [Citation(s) in RCA: 35] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2016] [Revised: 08/19/2016] [Accepted: 08/23/2016] [Indexed: 11/29/2022]
Abstract
Personality traits, defined as differences in the behavior of individual animals of the same species that are consistent over time and context, such as ‘boldness,’ have been shown to be both heritable and be influenced by external factors, such as predation pressure. Currently, we know very little about the role that early environmental factors have upon personality. Thus, we investigated the impact of incubation temperature upon the boldness on an oviparous reptile, the bearded dragon (Pogona vitticeps). Eggs, from one clutch, were incubated at two different average temperatures within the normal range. After hatching the lizards were raised under the same environmental conditions. Novel object and novel environment tests were used to assess personality. Each test was repeated in both the short term and the long term. The results revealed that incubation temperature did impact upon ‘boldness’ but only in the short term and suggests that, rather than influencing personality, incubation temperature may have an effect on the development of behavioral of oviparous reptiles at different stages across ontogeny.
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Affiliation(s)
- Harry Siviter
- School of Life Sciences, University of Lincoln, Lincoln, LN6 7DL, UK
| | - D Charles Deeming
- School of Life Sciences, University of Lincoln, Lincoln, LN6 7DL, UK
| | - Joanna Rosenberger
- Institute of Animal Breeding, Division of Poultry Breeding, Wroclaw University of Environmental and Life Sciences, Wrocław, Poland
| | - Oliver H P Burman
- School of Life Sciences, University of Lincoln, Lincoln, LN6 7DL, UK
| | - Sophie A Moszuti
- School of Life Sciences, University of Lincoln, Lincoln, LN6 7DL, UK
| | - Anna Wilkinson
- School of Life Sciences, University of Lincoln, Lincoln, LN6 7DL, UK.
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21
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McCormick MI. Protogyny in a tropical damselfish: females queue for future benefit. PeerJ 2016; 4:e2198. [PMID: 27413641 PMCID: PMC4933090 DOI: 10.7717/peerj.2198] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/21/2016] [Accepted: 06/09/2016] [Indexed: 11/20/2022] Open
Abstract
Membership of the group is a balance between the benefits associated with group living and the cost of socially constrained growth and breeding opportunities, but the costs and benefits are seldom examined. The goal of the present study was to explore the trade-offs associated with group living for a sex-changing, potentially protogynous coral reef fish, the Ambon damselfish, Pomacentrus amboinensis. Extensive sampling showed that the species exhibits resource defence polygyny, where dominant males guard a nest site that is visited by females. P. amboinensis have a longevity of about 6.5 years on the northern Great Barrier Reef. While the species can change sex consistent with being a protogynous hermaphrodite, it is unclear the extent to which the species uses this capability. Social groups are comprised of one reproductive male, 1-7 females and a number of juveniles. Females live in a linear dominance hierarchy, with the male being more aggressive to the beta-female than the alpha-female, who exhibits lower levels of ovarian cortisol. Surveys and a tagging study indicated that groups were stable for at least three months. A passive integrated transponder tag study showed that males spawn with females from their own group, but also females from neighbouring groups. In situ behavioural observations found that alpha-females have priority of access to the nest site that the male guarded, and access to higher quality foraging areas. Male removal studies suggest that the alpha-females can change sex to take over from the male when the position becomes available. Examination of otolith microstructure showed that those individuals which change sex to males have different embryonic characteristics at hatching, suggesting that success may involve a component that is parentally endowed. The relative importance of parental effects and social organisation in affecting the importance of female queuing is yet to be studied, but will likely depend on the strength of social control by the dominant members of the group.
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Affiliation(s)
- Mark I McCormick
- ARC Centre of Excellence for Coral Reef Studies, and Department of Marine Biology and Aquaculture, James Cook University , Townsville , Queensland , Australia
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22
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Jeffrey JD, Gilmour KM. Programming of the hypothalamic-pituitary-interrenal axis by maternal social status in zebrafish (Danio rerio). ACTA ACUST UNITED AC 2016; 219:1734-43. [PMID: 27045091 DOI: 10.1242/jeb.138826] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Accepted: 03/17/2016] [Indexed: 01/02/2023]
Abstract
The present study examined the effects of maternal social status, with subordinate status being a chronic stressor, on development and activity of the stress axis in zebrafish embryos and larvae. Female zebrafish were confined in pairs for 48 h to establish dominant/subordinate hierarchies; their offspring were reared to 144 h post-fertilization (hpf) and sampled at five time points over development. No differences were detected in maternal cortisol contribution, which is thought to be an important programmer of offspring phenotype. However, once zebrafish offspring began to synthesize cortisol de novo (48 hpf), larvae of dominant females exhibited significantly lower baseline cortisol levels than offspring of subordinate females. These lower cortisol levels may reflect reduced hypothalamic-pituitary-interrenal (HPI) axis activity, because corticotropin-releasing factor (crf) and cytochrome p450 side chain cleavage enzyme (p450scc) mRNA levels also were lower in larvae from dominant females. Moreover, baseline mRNA levels of HPI axis genes continued to be affected by maternal social status beyond 48 hpf. At 144 hpf, stress-induced cortisol levels were significantly lower in offspring of subordinate females. These results suggest programming of stress axis function in zebrafish offspring by maternal social status, emphasizing the importance of maternal environment and experience on offspring stress axis activity.
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Affiliation(s)
- Jennifer D Jeffrey
- Department of Biology, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
| | - Kathleen M Gilmour
- Department of Biology, University of Ottawa, Ottawa, Ontario, Canada K1N 6N5
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23
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24
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Guillaume AS, Monro K, Marshall DJ. Transgenerational plasticity and environmental stress: do paternal effects act as a conduit or a buffer? Funct Ecol 2015. [DOI: 10.1111/1365-2435.12604] [Citation(s) in RCA: 73] [Impact Index Per Article: 8.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022]
Affiliation(s)
- Annie S. Guillaume
- School of Biological Sciences Monash University Melbourne Victoria 3800 Australia
| | - Keyne Monro
- School of Biological Sciences Monash University Melbourne Victoria 3800 Australia
| | - Dustin J. Marshall
- School of Biological Sciences Monash University Melbourne Victoria 3800 Australia
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25
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Bonin MC, Boström-Einarsson L, Munday PL, Jones GP. The Prevalence and Importance of Competition Among Coral Reef Fishes. ANNUAL REVIEW OF ECOLOGY EVOLUTION AND SYSTEMATICS 2015. [DOI: 10.1146/annurev-ecolsys-112414-054413] [Citation(s) in RCA: 40] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Although competition is recognized as a core ecological process, its prevalence and importance in coral reef fish communities have been debated. Here we compile and synthesize the results of 173 experimental tests of competition from 72 publications. We show that evidence for competition is pervasive both within and between species, with 72% of intraspecific tests and 56% of interspecific tests demonstrating a demographically significant consequence of competition (e.g., a decrease in recruitment, survival, growth, or fecundity). We highlight several factors that can interact with the effects of competition and make it more difficult to detect in field experiments. In light of this evidence, we discuss the role of competition in shaping coral reef fish communities and competition's status as one of several processes that contribute to species coexistence. Finally, we consider some of the complex ways that climate change may influence competition, and we provide suggestions for future research.
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Affiliation(s)
- Mary C. Bonin
- Australian Research Council Center of Excellence for Coral Reef Studies and College of Marine and Environmental Sciences, James Cook University, Townsville, Queensland 4811, Australia
| | - Lisa Boström-Einarsson
- Australian Research Council Center of Excellence for Coral Reef Studies and College of Marine and Environmental Sciences, James Cook University, Townsville, Queensland 4811, Australia
| | - Philip L. Munday
- Australian Research Council Center of Excellence for Coral Reef Studies and College of Marine and Environmental Sciences, James Cook University, Townsville, Queensland 4811, Australia
| | - Geoffrey P. Jones
- Australian Research Council Center of Excellence for Coral Reef Studies and College of Marine and Environmental Sciences, James Cook University, Townsville, Queensland 4811, Australia
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26
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Maternal intraguild predation risk affects offspring anti-predator behavior and learning in mites. Sci Rep 2015; 5:15046. [PMID: 26449645 PMCID: PMC4598869 DOI: 10.1038/srep15046] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2015] [Accepted: 09/08/2015] [Indexed: 11/08/2022] Open
Abstract
Predation risk is a strong selective force shaping prey morphology, life history and behavior. Anti-predator behaviors may be innate, learned or both but little is known about the transgenerational behavioral effects of maternally experienced predation risk. We examined intraguild predation (IGP) risk-induced maternal effects on offspring anti-predator behavior, including learning, in the predatory mite Phytoseiulus persimilis. We exposed predatory mite mothers during egg production to presence or absence of the IG predator Amblyseius andersoni and assessed whether maternal stress affects the anti-predator behavior, including larval learning ability, of their offspring as protonymphs. Protonymphs emerging from stressed or unstressed mothers, and having experienced IGP risk as larvae or not, were subjected to choice situations with and without IG predator traces. Predator-experienced protonymphs from stressed mothers were the least active and acted the boldest in site choice towards predator cues. We argue that the attenuated response of the protonymphs to predator traces alone represents optimized risk management because no immediate risk existed. Such behavioral adjustment could reduce the inherent fitness costs of anti-predator behaviors. Overall, our study suggests that P. persimilis mothers experiencing IGP risk may prime their offspring to behave more optimally in IGP environments.
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27
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Sopinka NM, Hinch SG, Healy SJ, Harrison PM, Patterson DA. Egg cortisol treatment affects the behavioural response of coho salmon to a conspecific intruder and threat of predation. Anim Behav 2015. [DOI: 10.1016/j.anbehav.2015.03.011] [Citation(s) in RCA: 25] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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28
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Eaton L, Edmonds EJ, Henry TB, Snellgrove DL, Sloman KA. Mild maternal stress disrupts associative learning and increases aggression in offspring. Horm Behav 2015; 71:10-5. [PMID: 25840012 DOI: 10.1016/j.yhbeh.2015.03.005] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/26/2014] [Revised: 03/17/2015] [Accepted: 03/24/2015] [Indexed: 01/22/2023]
Abstract
Maternal stress has been shown to affect behaviour of offspring in a wide range of animals, but this evidence has come from studies that exposed gestating mothers to acute or severe stressors, such as restraint or exposure to synthetic stress hormones. Here we show that exposure of mothers to even a mild stressor reduces associative learning and increases aggression in offspring. Female guppies were exposed to routine husbandry procedures that produced only a minimal, non-significant, elevation of the stress hormone cortisol. In contrast to controls, offspring from mothers that experienced this mild stress failed to learn to associate a colour cue and food reward, and showed a greater amount of inter-individual variation in behaviour compared with control offspring. This mild stress also resulted in offspring that were more aggressive towards their own mirror image than controls. While it is possible that these results could represent the transmission of beneficial maternal characteristics to offspring born into unpredictable environments, the potential for mild maternal stress to affect offspring performance also has important implications for research into the trans-generational effects of stress.
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Affiliation(s)
- L Eaton
- Institute of Biomedical and Environmental Health Research, School of Science and Sport, University of the West of Scotland, Paisley, Scotland PA1 2BE, UK.
| | - E J Edmonds
- Institute of Biomedical and Environmental Health Research, School of Science and Sport, University of the West of Scotland, Paisley, Scotland PA1 2BE, UK
| | - T B Henry
- School of Life Sciences, Heriot-Watt University, Edinburgh, Scotland EH14 4AS, UK; Center for Environmental Biotechnology, University of Tennessee, Knoxville, TN 37996, USA; Department of Forestry, Wildlife and Fisheries, University of Tennessee, Knoxville, TN 37996 USA
| | - D L Snellgrove
- WALTHAM Centre for Pet Nutrition, Freeby Lane, Waltham-on-the-Wolds, LE14 4RT, Leicestershire, UK
| | - K A Sloman
- Institute of Biomedical and Environmental Health Research, School of Science and Sport, University of the West of Scotland, Paisley, Scotland PA1 2BE, UK
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29
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Jeffrey JD, Hasler CT, Chapman JM, Cooke SJ, Suski CD. Linking Landscape-Scale Disturbances to Stress and Condition of Fish: Implications for Restoration and Conservation. Integr Comp Biol 2015; 55:618-30. [PMID: 25931612 DOI: 10.1093/icb/icv022] [Citation(s) in RCA: 35] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Humans have dramatically altered landscapes as a result of urban and agricultural development, which has led to decreases in the quality and quantity of habitats for animals. This is particularly the case for freshwater fish that reside in fluvial systems, given that changes to adjacent lands have direct impacts on the structure and function of watersheds. Because choices of habitat have physiological consequences for organisms, animals that occupy sub-optimal habitats may experience increased expenditure of energy or homeostatic overload that can cause negative outcomes for individuals and populations. With the imperiled and threatened status of many freshwater fish, there is a critical need to define relationships between land use, quality of the habitat, and physiological performance for resident fish as an aid to restoration and management. Here, we synthesize existing literature to relate variation in land use at the scale of watersheds to the physiological status of resident fish. This examination revealed that landscape-level disturbances can influence a host of physiological properties of resident fishes, ranging from cellular and genomic levels to the hormonal and whole-animal levels. More importantly, these physiological responses have been integrated into traditional field-based monitoring protocols to provide a mechanistic understanding of how organisms interact with their environment, and to enhance restoration. We also generated a conceptual model that provides a basis for relating landscape-level changes to physiological responses in fish. We conclude that physiological sampling of resident fish has the potential to assess the effects of landscape-scale disturbances on freshwater fish and to enhance restoration and conservation.
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Affiliation(s)
- Jennifer D Jeffrey
- *Department of Natural Resources and Environmental Sciences, University of Illinois, W-503 Turner Hall, 1102 S Goodwin Avenue, Urbana, IL 61801, USA; Fish Ecology and Conservation Physiology Laboratory, Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6; Institute of Environmental Science, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6
| | - Caleb T Hasler
- *Department of Natural Resources and Environmental Sciences, University of Illinois, W-503 Turner Hall, 1102 S Goodwin Avenue, Urbana, IL 61801, USA; Fish Ecology and Conservation Physiology Laboratory, Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6; Institute of Environmental Science, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6
| | - Jacqueline M Chapman
- *Department of Natural Resources and Environmental Sciences, University of Illinois, W-503 Turner Hall, 1102 S Goodwin Avenue, Urbana, IL 61801, USA; Fish Ecology and Conservation Physiology Laboratory, Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6; Institute of Environmental Science, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6
| | - Steven J Cooke
- *Department of Natural Resources and Environmental Sciences, University of Illinois, W-503 Turner Hall, 1102 S Goodwin Avenue, Urbana, IL 61801, USA; Fish Ecology and Conservation Physiology Laboratory, Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6; Institute of Environmental Science, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6 *Department of Natural Resources and Environmental Sciences, University of Illinois, W-503 Turner Hall, 1102 S Goodwin Avenue, Urbana, IL 61801, USA; Fish Ecology and Conservation Physiology Laboratory, Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6; Institute of Environmental Science, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6
| | - Cory D Suski
- *Department of Natural Resources and Environmental Sciences, University of Illinois, W-503 Turner Hall, 1102 S Goodwin Avenue, Urbana, IL 61801, USA; Fish Ecology and Conservation Physiology Laboratory, Department of Biology, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6; Institute of Environmental Science, Carleton University, 1125 Colonel By Drive, Ottawa, Ontario, Canada K1S 5B6
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30
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Chen B, Li S, Ren Q, Tong X, Zhang X, Kang L. Paternal epigenetic effects of population density on locust phase-related characteristics associated with heat-shock protein expression. Mol Ecol 2015; 24:851-62. [DOI: 10.1111/mec.13072] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2014] [Revised: 01/02/2015] [Accepted: 01/07/2015] [Indexed: 12/28/2022]
Affiliation(s)
- Bing Chen
- State Key Laboratory of Integrated Management of Pest Insects and Rodents; Institute of Zoology; Chinese Academy of Sciences; Beijing 100101 China
| | - Shaoqin Li
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory; College of Plant Science and Technology; Huazhong Agricultural University; Wuhan 430070 China
| | - Qiang Ren
- State Key Laboratory of Integrated Management of Pest Insects and Rodents; Institute of Zoology; Chinese Academy of Sciences; Beijing 100101 China
- Hubei Insect Resources Utilization and Sustainable Pest Management Key Laboratory; College of Plant Science and Technology; Huazhong Agricultural University; Wuhan 430070 China
| | - Xiwen Tong
- State Key Laboratory of Integrated Management of Pest Insects and Rodents; Institute of Zoology; Chinese Academy of Sciences; Beijing 100101 China
| | - Xia Zhang
- Beijing Institute of Life Sciences; Chinese Academy of Sciences; Beijing 100101 China
| | - Le Kang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents; Institute of Zoology; Chinese Academy of Sciences; Beijing 100101 China
- Beijing Institute of Life Sciences; Chinese Academy of Sciences; Beijing 100101 China
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31
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Skaalsvik TH, Bolla SL, Thornqvist PO, Babiak I. Quantitative characteristics of Atlantic halibut (Hippoglossus hippoglossus L.) egg quality throughout the reproductive season. Theriogenology 2015; 83:38-47. [DOI: 10.1016/j.theriogenology.2014.07.043] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/19/2014] [Revised: 07/02/2014] [Accepted: 07/05/2014] [Indexed: 11/27/2022]
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32
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Patterson JT, Green CC. Diet-Induced Fatty Acid Variation in Critical Tissues of a Spawning Estuarine Fish and Consequences for Larval Fitness. Physiol Biochem Zool 2014; 87:612-22. [DOI: 10.1086/678080] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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33
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Messmer V, Blowes SA, Jones GP, Munday PL. Experimental evaluation of diversity–productivity relationships in a coral reef fish assemblage. Oecologia 2014; 176:237-49. [DOI: 10.1007/s00442-014-2992-9] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/17/2013] [Accepted: 06/04/2014] [Indexed: 11/29/2022]
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34
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Mommer BC, Bell AM. Maternal experience with predation risk influences genome-wide embryonic gene expression in threespined sticklebacks (Gasterosteus aculeatus). PLoS One 2014; 9:e98564. [PMID: 24887438 PMCID: PMC4041765 DOI: 10.1371/journal.pone.0098564] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2014] [Accepted: 05/05/2014] [Indexed: 12/04/2022] Open
Abstract
There is growing evidence for nongenetic effects of maternal experience on offspring. For example, previous studies have shown that female threespined stickleback fish (Gasterosteus aculeatus) exposed to predation risk produce offspring with altered behavior, metabolism and stress physiology. Here, we investigate the effect of maternal exposure to predation risk on the embryonic transcriptome in sticklebacks. Using RNA-sequencing we compared genome-wide transcription in three day post-fertilization embryos of predator-exposed and control mothers. There were hundreds of differentially expressed transcripts between embryos of predator-exposed mothers and embryos of control mothers including several non-coding RNAs. Gene Ontology analysis revealed biological pathways involved in metabolism, epigenetic inheritance, and neural proliferation and differentiation that differed between treatments. Interestingly, predation risk is associated with an accelerated life history in many vertebrates, and several of the genes and biological pathways that were identified in this study suggest that maternal exposure to predation risk accelerates the timing of embryonic development. Consistent with this hypothesis, embryos of predator-exposed mothers were larger than embryos of control mothers. These findings point to some of the molecular mechanisms that might underlie maternal effects.
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Affiliation(s)
- Brett C. Mommer
- Department of Animal Biology, School of Integrative Biology, University of Illinois, Urbana, Illinois, United States of America
- * E-mail:
| | - Alison M. Bell
- Department of Animal Biology, School of Integrative Biology, University of Illinois, Urbana, Illinois, United States of America
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35
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Murphy AD, Goedert D, Morris MR. Maternal effects are long-lasting and influence female offspring's reproductive strategy in the swordtail fish Xiphophorus multilineatus. J Evol Biol 2014; 27:1613-22. [DOI: 10.1111/jeb.12414] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2014] [Revised: 04/14/2014] [Accepted: 04/15/2014] [Indexed: 11/29/2022]
Affiliation(s)
- A. D. Murphy
- Department of Biological Sciences; Ohio University; Athens OH USA
| | - D. Goedert
- Department of Biological Sciences; Ohio University; Athens OH USA
| | - M. R. Morris
- Department of Biological Sciences; Ohio University; Athens OH USA
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36
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Stress hormones in relation to breeding status and territory location in colonial king penguin: a role for social density? Oecologia 2014; 175:763-72. [DOI: 10.1007/s00442-014-2942-6] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2013] [Accepted: 04/02/2014] [Indexed: 01/28/2023]
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37
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Johnson DW, Grorud-Colvert K, Sponaugle S, Semmens BX. Phenotypic variation and selective mortality as major drivers of recruitment variability in fishes. Ecol Lett 2014; 17:743-55. [PMID: 24674603 DOI: 10.1111/ele.12273] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/26/2013] [Revised: 01/31/2014] [Accepted: 02/24/2014] [Indexed: 11/29/2022]
Abstract
An individual's phenotype will usually influence its probability of survival. However, when evaluating the dynamics of populations, the role of selective mortality is not always clear. Not all mortality is selective, patterns of selective mortality may vary, and it is often unknown how selective mortality compares or interacts with other sources of mortality. As a result, there is seldom a clear expectation for how changes in the phenotypic composition of populations will translate into differences in average survival. We address these issues by evaluating how selective mortality affects recruitment of fish populations. First, we provide a quantitative review of selective mortality. Our results show that most of the mortality during early life is selective, and that variation in phenotypes can have large effects on survival. Next, we describe an analytical framework that accounts for variation in selection, while also describing the amount of selective mortality experienced by different cohorts recruiting to a single population. This framework is based on reconstructing fitness surfaces from phenotypic selection measurements, and can be employed for either single or multiple traits. Finally, we show how this framework can be integrated with models of density-dependent survival to improve our understanding of recruitment variability and population dynamics.
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Affiliation(s)
- Darren W Johnson
- Marine Biology Research Division, Scripps Institution of Oceanography, UC San Diego, La Jolla, CA, 92023, USA
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38
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Stratmann A, Taborsky B. Antipredator defences of young are independently determined by genetic inheritance, maternal effects and own early experience in mouthbrooding cichlids. Funct Ecol 2014. [DOI: 10.1111/1365-2435.12224] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/03/2023]
Affiliation(s)
- Ariane Stratmann
- Behavioural Ecology; Institute of Ecology and Evolution; University of Bern; Wohlenstrasse 50A CH-3032 Hinterkappelen Switzerland
- Division of Animal Welfare; Veterinary Public Health Institute; University of Bern; Burgerweg 22 CH-3052 Zollikofen Switzerland
| | - Barbara Taborsky
- Behavioural Ecology; Institute of Ecology and Evolution; University of Bern; Wohlenstrasse 50A CH-3032 Hinterkappelen Switzerland
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39
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Viblanc VA, Saraux C, Malosse N, Groscolas R. Energetic adjustments in freely breeding‐fasting king penguins: does colony density matter? Funct Ecol 2014. [DOI: 10.1111/1365-2435.12212] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Vincent A. Viblanc
- Université de Strasbourg IPHC 23 rue Becquerel 67087 Strasbourg France
- CNRS UMR 7178 67087 Strasbourg France
- Centre d'Ecologie Fonctionnelle et Evolutive Equipe Ecologie Comportementale UMR 5175 CNRS 1919 route de Mende 34293 Montpellier France
| | - Claire Saraux
- Université de Strasbourg IPHC 23 rue Becquerel 67087 Strasbourg France
- CNRS UMR 7178 67087 Strasbourg France
- Laboratoire Ressources Halieutiques de Sète Institut Français de Recherche pour l'Exploitation de la Mer Station de Sète Avenue Jean Monnet BP 171 34203 Sète Cedex France
| | - Nelly Malosse
- Université de Strasbourg IPHC 23 rue Becquerel 67087 Strasbourg France
- CNRS UMR 7178 67087 Strasbourg France
| | - René Groscolas
- Université de Strasbourg IPHC 23 rue Becquerel 67087 Strasbourg France
- CNRS UMR 7178 67087 Strasbourg France
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40
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Jensen N, Allen RM, Marshall DJ. Adaptive maternal and paternal effects: gamete plasticity in response to parental stress. Funct Ecol 2013. [DOI: 10.1111/1365-2435.12195] [Citation(s) in RCA: 55] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/28/2022]
Affiliation(s)
- Natasha Jensen
- School of Biological Sciences University of Queensland Brisbane Queensland 4072 Australia
| | - Richard M. Allen
- Department of Oceanography Dalhousie University Halifax Nova Scotia B3H 4R2 Canada
- Department of Ocean Sciences Memorial University St. John's Newfoundland A1C 5S7 Canada
| | - Dustin J. Marshall
- School of Biological Sciences Monash University Melbourne Victoria 3800 Australia
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41
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A test of maternal programming of offspring stress response to predation risk in threespine sticklebacks. Physiol Behav 2013; 122:222-7. [PMID: 23628383 DOI: 10.1016/j.physbeh.2013.04.004] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2012] [Revised: 04/16/2013] [Accepted: 04/19/2013] [Indexed: 12/19/2022]
Abstract
Non-genetic maternal effects are widespread across taxa and challenge our traditional understanding of inheritance. Maternal experience with predators, for example, can have lifelong consequences for offspring traits, including fitness. Previous work in threespine sticklebacks showed that females exposed to simulated predation risk produced eggs with higher cortisol content and offspring with altered anti-predator behavior. However, it is unknown whether this maternal effect is mediated via the offspring glucocorticoid stress response and if it is retained over the entire lifetime of offspring. Therefore, we tested the hypothesis that maternal exposure to simulated predation risk has long-lasting effects on the cortisol response to simulated predation risk in stickleback offspring. We measured circulating concentrations of cortisol before (baseline), 15 min after, and 60 min after exposure to a simulated predation risk. We compared adult offspring of predator-exposed mothers and control mothers in two different social environments (alone or in a group). Relative to baseline, offspring plasma cortisol was highest 15 min after exposure to simulated predation risk and decreased after 60 min. Offspring of predator-exposed mothers differed in the cortisol response to simulated predation risk compared to offspring of control mothers. In general, females had higher cortisol than males, and fish in a group had lower cortisol than fish that were by themselves. The buffering effect of the social environment did not differ between maternal treatments or between males and females. Altogether the results show that while a mother's experience with simulated predation risk might affect the physiological response of her adult offspring to a predator, sex and social isolation have much larger effects on the stress response to predation risk in sticklebacks.
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42
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Ceballos-Osuna L, Carter HA, Miller NA, Stillman JH. Effects of ocean acidification on early life-history stages of the intertidal porcelain crab Petrolisthes cinctipes. J Exp Biol 2013; 216:1405-11. [DOI: 10.1242/jeb.078154] [Citation(s) in RCA: 49] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
SUMMARY
Intertidal zone organisms naturally experience daily fluctuations in pH, presently reaching values beyond what is predicted for open ocean surface waters from ocean acidification (OA) by the year 2100, and thus present an opportunity to study the pH sensitivity of organisms that are presumably adapted to an acidified environment. The intertidal zone porcelain crab, Petrolisthes cinctipes, was used to study physiological responses to low pH in embryonic, larval and newly recruited juvenile life-history stages. In these crabs, embryonic development occurs in the pH-variable intertidal zone (pH 6.9–9.5), larvae mature in the more stable pelagic environment (pH 7.9–8.2), and juvenile crabs settle back into the pH-variable intertidal zone. We examined survival, cardiac performance, energetics and morphology in embryonic, larval and juvenile crabs exposed to two pH conditions (pH 7.9 and 7.6). Embryos and larvae were split by brood between the pH treatments for 9 days to examine brood-specific responses to low pH. Hatching success did not differ between pH conditions, but ranged from 30% to 95% among broods. Larval survival was not affected by acidification, but juvenile survival was reduced by ~30% after longer (40 days) exposure to low pH. Embryonic and larval heart rates were 37% and 20% lower at low pH, and there was a brood-specific response in embryos. Embryos did not increase in volume under acidified conditions, compared with a 15% increase in ambient conditions. We conclude that sustained exposure to low pH could be detrimental to P. cinctipes embryos and larvae despite the fact that embryos are regularly exposed to naturally fluctuating hypercapnic water in the intertidal zone. Importantly, our results indicate that early life-history stage responses to OA may be brood specific through as yet undetermined mechanisms.
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Affiliation(s)
- Lina Ceballos-Osuna
- Romberg Tiburon Center, San Francisco State University, 3150 Paradise Drive, Tiburon, CA 94920, USA
| | - Hayley A. Carter
- Romberg Tiburon Center, San Francisco State University, 3150 Paradise Drive, Tiburon, CA 94920, USA
| | - Nathan A. Miller
- Romberg Tiburon Center, San Francisco State University, 3150 Paradise Drive, Tiburon, CA 94920, USA
| | - Jonathon H. Stillman
- Romberg Tiburon Center, San Francisco State University, 3150 Paradise Drive, Tiburon, CA 94920, USA
- Department of Integrative Biology, University of California, Berkeley, Valley Life Sciences Building no. 3140, Berkeley, CA 94720-3140, USA
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43
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Leips J, Helen Rodd F, Travis J. The adaptive significance of population differentiation in offspring size of the least killifish, Heterandria formosa. Ecol Evol 2013; 3:948-60. [PMID: 23610636 PMCID: PMC3631406 DOI: 10.1002/ece3.509] [Citation(s) in RCA: 16] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/05/2012] [Revised: 01/20/2013] [Accepted: 01/22/2013] [Indexed: 11/05/2022] Open
Abstract
We tested the hypothesis that density-dependent competition influences the evolution of offspring size. We studied two populations of the least killifish (Heterandria formosa) that differ dramatically in population density; these populations are genetically differentiated for offspring size, and females from both populations produce larger offspring when they experience higher social densities. To look at the influences of population of origin and relative body size on competitive ability, we held females from the high-density population at two different densities to create large and small offspring with the same genetic background. We measured the competitive ability of those offspring in mesocosms that contained either pure or mixed population treatments at either high or low density. High density increased competition, which was most evident in greatly reduced individual growth rates. Larger offspring from the high-density population significantly delayed the onset of maturity of fish from the low-density population. From our results, we infer that competitive conditions in nature have contributed to the evolution of genetically based interpopulation differences in offspring size as well as plasticity in offspring size in response to conspecific density.
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Affiliation(s)
- Jeff Leips
- Department of Biological Sciences, University of Maryland Baltimore County 1000 Hilltop Circle, Baltimore, MD, 21250, USA ; Department of Biological Science, Florida State University Tallahassee, Florida, 32306, USA
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44
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Bassar RD, Lopez-Sepulcre A, Reznick DN, Travis J. Experimental Evidence for Density-Dependent Regulation and Selection on Trinidadian Guppy Life Histories. Am Nat 2013; 181:25-38. [DOI: 10.1086/668590] [Citation(s) in RCA: 81] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022]
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45
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Affiliation(s)
- M. J. Sheriff
- Institute of Arctic Biology; University of Alaska Fairbanks; Fairbanks; AK; USA
| | - O. P. Love
- Department of Biological Sciences; University of Windsor; Windsor; ON; Canada
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46
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Maddams JC, McCormick MI. Not all offspring are created equal: variation in larval characteristics in a serially spawning damselfish. PLoS One 2012; 7:e48525. [PMID: 23155389 PMCID: PMC3498294 DOI: 10.1371/journal.pone.0048525] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2011] [Accepted: 10/01/2012] [Indexed: 11/21/2022] Open
Abstract
The way organisms allocate their resources to growth and reproduction are key attributes differentiating life histories. Many organisms spawn multiple times in a breeding season, but few studies have investigated the impact of serial spawning on reproductive allocation. This study investigated whether resource allocation was influenced by parental characteristics and prior spawning history in a serial spawning tropical damselfish (Pomacentrus amboinensis). The offspring attributes of isolated parents of known characteristics were monitored over a 6-week breeding period in the field. Smaller females produced larvae of longer length and larger energy reserves at hatching. This finding is contrary to several other studies that found larger females produce offspring of greater quality. We found that resource allocation in the form of reproductive output was not influenced by the number of spawning events within the breeding season, with larger females producing the greatest number of offspring. Larval characteristics changed as spawning progressed. There was a general decline in length of larvae produced, with an increase in the size of the larval yolk-sac, for all females regardless of size as spawning progressed. This trend was accentuated by the smallest females. This change in larval characteristics may reflect a parental ability to forecast unfavourable conditions as the season progresses or a mechanism to ensure that some will survive no matter what conditions they encounter. This study highlights the importance of accounting for temporal changes in reproductive allocation in studies of reproductive trade-offs and investigations into the importance of parental effects.
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Affiliation(s)
- Jessica Claire Maddams
- School of Marine and Tropical Biology, James Cook University, Townsville, Queensland, Australia.
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47
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Love OP, McGowan PO, Sheriff MJ. Maternal adversity and ecological stressors in natural populations: the role of stress axis programming in individuals, with implications for populations and communities. Funct Ecol 2012. [DOI: 10.1111/j.1365-2435.2012.02040.x] [Citation(s) in RCA: 152] [Impact Index Per Article: 12.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Affiliation(s)
- Oliver P. Love
- Department of Biological Sciences; University of Windsor; 401 Sunset Avenue; Windsor; Ontario; N9B 3P4; Canada
| | - Patrick O. McGowan
- Department of Biological Sciences; University of Toronto Scarborough; 1265 Military Trail; Toronto; Ontario; M1C 1A4; Canada
| | - Michael J. Sheriff
- Institute of Arctic Biology; University of Alaska Fairbanks; 902 N. Koyukuk Dr; Fairbanks; Alaska; 99775; USA
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48
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Régnier T, Bolliet V, Gaudin P, Labonne J. Female effects on offspring energetic status and consequences on early development in yolk feeding brown trout (Salmo trutta). ACTA ACUST UNITED AC 2012; 317:347-58. [PMID: 22777730 DOI: 10.1002/jez.1728] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
Energetic status can be defined as the interaction between energy stores and metabolic rate. In salmonids, it is variable and influences the timing of emergence, and therefore may have strong effects on both juvenile and maternal fitness. The aim of this study is to (i) describe the ontogeny of energy use for different brown trout clutches to understand how such a variability of energetic status is developed at the end of incubation and (ii) to estimate maternal influences over offspring physiological processes. Using individual measures of total mass and metabolism throughout ontogeny combined with a hierarchical Bayesian modeling approach, we successfully described clutch-specific (i) metabolic trajectories, (ii) use of yolk resources and the building of new tissues throughout ontogeny. Our results show that females laying large eggs have offspring with lower metabolic costs and higher yolk conversion efficiencies. Females also influence within clutch variance of metabolic and yolk consumption rates leading to potential developmental variations. These results are discussed with regard to their consequences on early life history through the critical period of emergence.
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Affiliation(s)
- Thomas Régnier
- INRA-UMR ECOBIOP, Pôle d'Hydrobiologie INRA, Saint Pée sur Nivelle, France.
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49
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McGhee KE, Pintor LM, Suhr EL, Bell AM. Maternal exposure to predation risk decreases offspring antipredator behaviour and survival in threespined stickleback. Funct Ecol 2012; 26:932-940. [PMID: 22962510 DOI: 10.1111/j.1365-2435.2012.02008.x] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/01/2023]
Abstract
1. Adaptive maternal programming occurs when mothers alter their offspring's phenotype in response to environmental information such that it improves offspring fitness. When a mother's environment is predictive of the conditions her offspring are likely to encounter, such transgenerational plasticity enables offspring to be better-prepared for this particular environment. However, maternal effects can also have deleterious effects on fitness.2. Here, we test whether female threespined stickleback fish exposed to predation risk adaptively prepare their offspring to cope with predators. We either exposed gravid females to a model predator or not, and compared their offspring's antipredator behaviour and survival when alone with a live predator. Importantly, we measured offspring behaviour and survival in the face of the same type of predator that threatened their mothers (Northern pike).3. We did not find evidence for adaptive maternal programming; offspring of predator-exposed mothers were less likely to orient to the predator than offspring from unexposed mothers. In our predation assay, orienting to the predator was an effective antipredator behaviour and those that oriented, survived for longer.4. In addition, offspring from predator-exposed mothers were caught more quickly by the predator on average than offspring from unexposed mothers. The difference in antipredator behaviour between the maternal predator-exposure treatments offers a potential behavioural mechanism contributing to the difference in survival between maternal treatments.5. However, the strength and direction of the maternal effect on offspring survival depended on offspring size. Specifically, the larger the offspring from predator-exposed mothers, the more vulnerable they were to predation compared to offspring from unexposed mothers.6. Our results suggest that the predation risk perceived by mothers can have long-term behavioural and fitness consequences for offspring in response to the same predator. These stress-mediated maternal effects can have nonadaptive consequences for offspring when they find themselves alone with a predator. In addition, complex interactions between such maternal effects and offspring traits such as size can influence our conclusions about the adaptive nature of maternal effects.
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Affiliation(s)
- Katie E McGhee
- School of Integrative Biology, University of Illinois, Urbana, Illinois, U.S.A
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50
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Dantzer B, Swanson EM. Mediation of vertebrate life histories via insulin-like growth factor-1. Biol Rev Camb Philos Soc 2011; 87:414-29. [PMID: 21981025 DOI: 10.1111/j.1469-185x.2011.00204.x] [Citation(s) in RCA: 71] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/29/2022]
Abstract
Life-history traits describe parameters associated with growth, size, survival, and reproduction. Life-history variation is a hallmark of biological diversity, yet researchers commonly observe that one of the major axes of life-history variation after controlling for body size involves trade-offs among growth, reproduction, and longevity. This persistent pattern of covariation among these specific traits has engendered a search for shared mechanisms that could constrain or facilitate production of variation in life-history strategies. Endocrine traits are one candidate mechanism that may underlie the integration of life history and other phenotypic traits. However, the vast majority of this research has been on the effects of steroid hormones such as glucocorticoids and androgens on life-history trade-offs. Here we propose an expansion of the focus on glucocorticoids and gonadal hormones and review the potential role of insulin-like growth factor-1 (IGF-1) in shaping the adaptive integration of multiple life-history traits. IGF-1 is a polypeptide metabolic hormone largely produced by the liver. We summarize a vast array of research demonstrating that IGF-1 levels are susceptible to environmental variation and that IGF-1 can have potent stimulatory effects on somatic growth and reproduction but decrease lifespan. We review the few studies in natural populations that have measured plasma IGF-1 concentrations and its associations with life-history traits or other characteristics of the organism or its environment. We focus on two case studies that found support for the hypothesis that IGF-1 mediates adaptive divergence in suites of life-history traits in response to varying ecological conditions or artificial selection. We also examine what we view as potentially fruitful avenues of research on this topic, which until now has been rarely investigated by evolutionary ecologists. We discuss how IGF-1 may facilitate adaptive plasticity in life-history strategies in response to early environmental conditions and also how selection on loci controlling IGF-1 signaling may mediate population divergence and eventual speciation. After consideration of the interactions among androgens, glucocorticoids, and IGF-1 we suggest that IGF-1 be considered a suitable candidate mechanism for mediating life-history traits. Finally, we discuss what we can learn about IGF-1 from studies in free-ranging animals. The voluminous literature in laboratory and domesticated animals documenting relationships among IGF-1, growth, reproduction, and lifespan demonstrates the potential for a number of new research questions to be asked in free-ranging animals. Examining how IGF-1 mediates life-history traits in free-ranging animals could lead to great insight into the mechanisms that influence life-history variation.
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Affiliation(s)
- Ben Dantzer
- Department of Zoology, Michigan State University, East Lansing, MI 48824, USA.
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