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Kareklas K, Teles MC, Nunes AR, Oliveira RF. Social zebrafish: Danio rerio as an emerging model in social neuroendocrinology. J Neuroendocrinol 2023; 35:e13280. [PMID: 37165563 DOI: 10.1111/jne.13280] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/29/2022] [Revised: 04/14/2023] [Accepted: 04/17/2023] [Indexed: 05/12/2023]
Abstract
The fitness benefits of social life depend on the ability of animals to affiliate with others and form groups, on dominance hierarchies within groups that determine resource distribution, and on cognitive capacities for recognition, learning and information transfer. The evolution of these phenotypes is coupled with that of neuroendocrine mechanisms, but the causal link between the two remains underexplored. Growing evidence from our research group and others demonstrates that the tools available in zebrafish, Danio rerio, can markedly facilitate progress in this field. Here, we review this evidence and provide a synthesis of the state-of-the-art in this model system. We discuss the involvement of generalized motivation and cognitive components, neuroplasticity and functional connectivity across social decision-making brain areas, and how these are modulated chiefly by the oxytocin-vasopressin neuroendocrine system, but also by reward-pathway monoamine signaling and the effects of sex-hormones and stress physiology.
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Affiliation(s)
| | - Magda C Teles
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
- ISPA-Instituto Universitário, Lisbon, Portugal
| | | | - Rui F Oliveira
- Instituto Gulbenkian de Ciência, Oeiras, Portugal
- ISPA-Instituto Universitário, Lisbon, Portugal
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2
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Neves CN, Pillay N. Sociability, but not spatial memory, is correlated with regional brain volume variation in the striped mouse Rhabdomys spp. Behav Brain Res 2022; 417:113567. [PMID: 34508770 DOI: 10.1016/j.bbr.2021.113567] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/01/2021] [Revised: 08/25/2021] [Accepted: 08/26/2021] [Indexed: 11/02/2022]
Abstract
Local environmental conditions associated with different geographic areas may elicit variations in behavioural responses in animals, leading to concomitant differences in functional brain region volumes. We investigated the behavioural correlates of hippocampus and amygdala volumes in three sister taxa of the murid rodent genus Rhabdomys, occurring in different environments. We used a Barnes maze to test spatial memory, dyadic encounters to test social behaviour, and histological brain sections to calculate hippocampus and amygdala volumes. Arid-occurring R. pumilio made fewer errors and had shorter latencies in locating the escape tunnel compared to moist grassland-occurring R. d. dilectus and R. d. chakae in two probe trials, 48 and 96 h after the last learning trial. R. pumilio was more amicable than the R. dilectus subspecies in intra-specific dyadic encounters. R. pumilio had larger hippocampus and amygdala volumes than the other species. Smaller amygdala volumes were correlated with longer latencies in females for probe trial 1, but males showed similar latencies regardless of taxon. Higher amicability scores were correlated with larger amygdala volumes in all taxa. Higher amicability scores were correlated with larger hippocampus volumes in R. pumilio and R. d. chakae but smaller hippocampus volumes in R. d. dilectus. Correlative relationships between spatial memory and amygdala volume appeared 48 h, but not 96 h, after the last learning trial. Local environmental conditions may influence spatial navigation, but social correlates drive regional brain size within cryptic striped mouse taxa.
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Affiliation(s)
- Candice Nikita Neves
- School of Animal, Plant, and Environmental Sciences, University of the Witwatersrand, 1 Jan Smuts Ave, Private Bag 3, Johannesburg 2050, South Africa
| | - Neville Pillay
- School of Animal, Plant, and Environmental Sciences, University of the Witwatersrand, 1 Jan Smuts Ave, Private Bag 3, Johannesburg 2050, South Africa.
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3
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Abstract
[Figure: see text].
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4
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Schneider N, Greenstreet E, Deoni SCL. Connecting inside out: Development of the social brain in infants and toddlers with a focus on myelination as a marker of brain maturation. Child Dev 2021; 93:359-371. [PMID: 34463347 PMCID: PMC9290142 DOI: 10.1111/cdev.13649] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2020] [Revised: 06/15/2021] [Accepted: 07/05/2021] [Indexed: 12/03/2022]
Abstract
Early childhood is a sensitive period for learning and social skill development. The maturation of cerebral regions underlying social processing lays the foundation for later social‐emotional competence. This study explored myelin changes in social brain regions and their association with changes in parent‐rated social‐emotional development in a cohort of 129 children (64 females, 0–36 months, 77 White). Results reveal a steep increase in myelination throughout the social brain in the first 3 years of life that is significantly associated with social‐emotional development scores. These findings add knowledge to the emerging picture of social brain development by describing neural underpinnings of human social behavior. They can contribute to identifying age‐/stage‐appropriate early life factors in this developmental domain.
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Affiliation(s)
- Nora Schneider
- Brain Health Department, Nestlé Institute of Health Science, Nestlé Research, Société des Produits Nestlé SA, Switzerland
| | | | - Sean C L Deoni
- Advanced Baby Imaging Lab, Rhode Island Hospital, Providence, Rhode Island, USA.,Department of Pediatrics, Warren Alpert Medical School at Brown University, Providence, Rhode Island, USA.,Department of Radiology, Warren Alpert Medical School at Brown University, Providence, Rhode Island, USA
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5
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Romero-Diaz C, Xu C, Campos SM, Herrmann MA, Kusumi K, Hews DK, Martins EP. Brain transcriptomic responses of Yarrow's spiny lizard, Sceloporus jarrovii, to conspecific visual or chemical signals. GENES BRAIN AND BEHAVIOR 2021; 20:e12753. [PMID: 34036739 DOI: 10.1111/gbb.12753] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2020] [Revised: 05/20/2021] [Accepted: 05/24/2021] [Indexed: 11/24/2022]
Abstract
Species with multimodal communication integrate information from social cues in different modalities into behavioral responses that are mediated by changes in gene expression in the brain. Differences in patterns of gene expression between signal modalities may shed light on the neuromolecular mechanisms underlying multisensory processing. Here, we use RNA-Seq to analyze brain transcriptome responses to either chemical or visual social signals in a territorial lizard with multimodal communication. Using an intruder challenge paradigm, we exposed 18 wild-caught, adult, male Sceloporus jarrovii to either male conspecific scents (femoral gland secretions placed on a small pebble), the species-specific push-up display (a programmed robotic model), or a control (an unscented pebble). We conducted differential expression analysis with both a de novo S. jarrovii transcriptome assembly and the reference genome of a closely related species, Sceloporus undulatus. Despite some inter-individual variation, we found significant differences in gene expression in the brain across signal modalities and the control in both analyses. The most notable differences occurred between chemical and visual stimulus treatments, closely followed by visual stimulus versus the control. Altered expression profiles could explain documented aggression differences in the immediate behavioral response to conspecific signals from different sensory modalities. Shared differentially expressed genes between visually- or chemically-stimulated males are involved in neural activity and neurodevelopment and several other differentially expressed genes in stimulus-challenged males are involved in conserved signal-transduction pathways associated with the social stress response, aggression and the response to territory intruders across vertebrates.
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Affiliation(s)
| | - Cindy Xu
- School of Life Sciences, Arizona State University, Tempe, Arizona, USA
| | - Stephanie M Campos
- Center for Behavioral Neuroscience, Neuroscience Institute, Georgia State University, Atlanta, Georgia, USA
| | - Morgan A Herrmann
- School of Life Sciences, Arizona State University, Tempe, Arizona, USA
| | - Kenro Kusumi
- School of Life Sciences, Arizona State University, Tempe, Arizona, USA
| | - Diana K Hews
- Department of Biology, Indiana State University, Terre Haute, Indiana, USA
| | - Emília P Martins
- School of Life Sciences, Arizona State University, Tempe, Arizona, USA
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6
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Beery AK, Shambaugh KL. Comparative Assessment of Familiarity/Novelty Preferences in Rodents. Front Behav Neurosci 2021; 15:648830. [PMID: 33927601 PMCID: PMC8076734 DOI: 10.3389/fnbeh.2021.648830] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2021] [Accepted: 03/19/2021] [Indexed: 12/26/2022] Open
Abstract
Sociality-i.e., life in social groups-has evolved many times in rodents, and there is considerable variation in the nature of these groups. While many species-typical behaviors have been described in field settings, the use of consistent behavioral assays in the laboratory provides key data for comparisons across species. The preference for interaction with familiar or novel individuals is an important dimension of social behavior. Familiarity preference, in particular, may be associated with more closed, less flexible social groups. The dimension from selectivity to gregariousness has been used as a factor in classification of social group types. Laboratory tests of social choice range from brief (10 minutes) to extended (e.g., 3 hours). As familiarity preferences typically need long testing intervals to manifest, we used 3-hour peer partner preference tests to test for the presence of familiarity preferences in same-sex cage-mates and strangers in rats. We then conducted an aggregated analysis of familiarity preferences across multiple rodent species (adult male and female rats, mice, prairie voles, meadow voles, and female degus) tested with the same protocol. We found a high degree of consistency within species across data sets, supporting the existence of strong, species-typical familiarity preferences in prairie voles and meadow voles, and a lack of familiarity preferences in other species tested. Sociability, or total time spent near conspecifics, was unrelated to selectivity in social preference. These findings provide important background for interpreting the neurobiological mechanisms involved in social behavior in these species.
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Affiliation(s)
- Annaliese K Beery
- Department of Integrative Biology, University of California, Berkeley, Berkeley, CA, United States.,Neuroscience Program, Departments of Psychology and Biology, Smith College, Northampton, MA, United States
| | - Katharine L Shambaugh
- Neuroscience Program, Departments of Psychology and Biology, Smith College, Northampton, MA, United States
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Grecias L, Hebert FO, Alves VA, Barber I, Aubin-Horth N. Host behaviour alteration by its parasite: from brain gene expression to functional test. Proc Biol Sci 2020; 287:20202252. [PMID: 33171082 PMCID: PMC7735270 DOI: 10.1098/rspb.2020.2252] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2020] [Accepted: 10/16/2020] [Indexed: 01/04/2023] Open
Abstract
Many parasites with complex life cycles modify their intermediate hosts' behaviour, presumably to increase transmission to their final host. The threespine stickleback (Gasterosteus aculeatus) is an intermediate host in the cestode Schistocephalus solidus life cycle, which ends in an avian host, and shows increased risky behaviours when infected. We studied brain gene expression profiles of sticklebacks infected with S. solidus to determine the proximal causes of these behavioural alterations. We show that infected fish have altered expression levels in genes involved in the inositol pathway. We thus tested the functional implication of this pathway and successfully rescued normal behaviours in infected sticklebacks using lithium exposure. We also show that exposed but uninfected fish have a distinct gene expression profile from both infected fish and control individuals, allowing us to separate gene activity related to parasite exposure from consequences of a successful infection. Finally, we find that selective serotonin reuptake inhibitor-treated sticklebacks and infected fish do not have similarly altered gene expression, despite their comparable behaviours, suggesting that the serotonin pathway is probably not the main driver of phenotypic changes in infected sticklebacks. Taken together, our results allow us to predict that if S. solidus directly manipulates its host, it could target the inositol pathway.
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Affiliation(s)
- Lucie Grecias
- Département de Biologie et Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada
| | - Francois Olivier Hebert
- Département de Biologie et Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada
| | - Verônica Angelica Alves
- Département de Biologie et Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada
| | - Iain Barber
- School of Animal, Rural and Environmental Sciences, Nottingham Trent University, Nottingham, UK
| | - Nadia Aubin-Horth
- Département de Biologie et Institut de Biologie Intégrative et des Systèmes (IBIS), Université Laval, Québec, Canada
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Yost RT, Robinson JW, Baxter CM, Scott AM, Brown LP, Aletta MS, Hakimjavadi R, Lone A, Cumming RC, Dukas R, Mozer B, Simon AF. Abnormal Social Interactions in a Drosophila Mutant of an Autism Candidate Gene: Neuroligin 3. Int J Mol Sci 2020; 21:E4601. [PMID: 32610435 PMCID: PMC7370170 DOI: 10.3390/ijms21134601] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/18/2020] [Revised: 06/25/2020] [Accepted: 06/26/2020] [Indexed: 12/20/2022] Open
Abstract
Social interactions are typically impaired in neuropsychiatric disorders such as autism, for which the genetic underpinnings are very complex. Social interactions can be modeled by analysis of behaviors, including social spacing, sociability, and aggression, in simpler organisms such as Drosophila melanogaster. Here, we examined the effects of mutants of the autism-related gene neuroligin 3 (nlg3) on fly social and non-social behaviors. Startled-induced negative geotaxis is affected by a loss of function nlg3 mutation. Social space and aggression are also altered in a sex- and social-experience-specific manner in nlg3 mutant flies. In light of the conserved roles that neuroligins play in social behavior, our results offer insight into the regulation of social behavior in other organisms, including humans.
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Affiliation(s)
- Ryley T. Yost
- Department of Biology, Faculty of Science, Western University, London, ON N6A 5B7, Canada; (R.T.Y.); (J.W.R.); (L.P.B.); (M.S.A.); (R.H.); (A.L.); (R.C.C.)
| | - J. Wesley Robinson
- Department of Biology, Faculty of Science, Western University, London, ON N6A 5B7, Canada; (R.T.Y.); (J.W.R.); (L.P.B.); (M.S.A.); (R.H.); (A.L.); (R.C.C.)
| | - Carling M. Baxter
- Animal Behaviour Group, Department of Psychology, Neuroscience and Behaviour (PNB) McMaster University, Hamilton, ON L8S 4K1, Canada; (C.M.B.); (A.M.S.); (R.D.)
| | - Andrew M. Scott
- Animal Behaviour Group, Department of Psychology, Neuroscience and Behaviour (PNB) McMaster University, Hamilton, ON L8S 4K1, Canada; (C.M.B.); (A.M.S.); (R.D.)
| | - Liam P. Brown
- Department of Biology, Faculty of Science, Western University, London, ON N6A 5B7, Canada; (R.T.Y.); (J.W.R.); (L.P.B.); (M.S.A.); (R.H.); (A.L.); (R.C.C.)
| | - M. Sol Aletta
- Department of Biology, Faculty of Science, Western University, London, ON N6A 5B7, Canada; (R.T.Y.); (J.W.R.); (L.P.B.); (M.S.A.); (R.H.); (A.L.); (R.C.C.)
| | - Ramtin Hakimjavadi
- Department of Biology, Faculty of Science, Western University, London, ON N6A 5B7, Canada; (R.T.Y.); (J.W.R.); (L.P.B.); (M.S.A.); (R.H.); (A.L.); (R.C.C.)
| | - Asad Lone
- Department of Biology, Faculty of Science, Western University, London, ON N6A 5B7, Canada; (R.T.Y.); (J.W.R.); (L.P.B.); (M.S.A.); (R.H.); (A.L.); (R.C.C.)
| | - Robert C. Cumming
- Department of Biology, Faculty of Science, Western University, London, ON N6A 5B7, Canada; (R.T.Y.); (J.W.R.); (L.P.B.); (M.S.A.); (R.H.); (A.L.); (R.C.C.)
| | - Reuven Dukas
- Animal Behaviour Group, Department of Psychology, Neuroscience and Behaviour (PNB) McMaster University, Hamilton, ON L8S 4K1, Canada; (C.M.B.); (A.M.S.); (R.D.)
| | - Brian Mozer
- Office of Research Integrity, Office of the Assistant Secretary for Health, Rockville, MD 20889, USA;
| | - Anne F. Simon
- Department of Biology, Faculty of Science, Western University, London, ON N6A 5B7, Canada; (R.T.Y.); (J.W.R.); (L.P.B.); (M.S.A.); (R.H.); (A.L.); (R.C.C.)
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9
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Cunningham CB. Functional genomics of parental care of insects. Horm Behav 2020; 122:104756. [PMID: 32353447 DOI: 10.1016/j.yhbeh.2020.104756] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 10/30/2019] [Revised: 04/01/2020] [Accepted: 04/06/2020] [Indexed: 12/19/2022]
Abstract
Parental care was likely the first step most lineages made towards sociality. However, the molecular mechanisms that generate parental care are not broadly characterized. Insects are important as an evolutionary independent group from classic models of parental care, such as, house mice. They provide an opportunity to test the generality of our understanding. With this review, I survey the functional genomics of parental care of insects, summarize several recent advances in the broader framework for studying and understanding parental care, and finish with suggested priorities for further research. Although there are too few studies to draw definitive conclusions, I argue that natural selection appears to be rewiring existing gene networks to produce parental care, that the epigenetic mechanisms influencing parental care are not well understood, and, as an interesting early consensus, that genes strongly associated with carer/offspring interactions appear biased towards proteins that are secreted. I summarize the studies that have functionally validate candidate genes and highlight the increasing need to perform this work. I finish with arguments for both conceptual and practical changes moving forward. I argue that future work can increase the use of predictive frameworks, broaden its definition of conservation of mechanism to gene networks rather than single genes, and increase the use of more established comparative methods. I further highlight the practical considerations of standardizing analyses and reporting, increasing the sampling of both carers and offspring, better characterizing gene regulatory networks, better characterizing taxonomically restricted genes and any consistent role they have underpinning parental care, and using factorial designs to disentangle the influence of multiple variables on the expression of parental care.
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10
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Larsen PA, Matocq MD. Emerging genomic applications in mammalian ecology, evolution, and conservation. J Mammal 2019. [DOI: 10.1093/jmammal/gyy184] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/22/2023] Open
Affiliation(s)
- Peter A Larsen
- Department of Veterinary and Biomedical Sciences, University of Minnesota, Saint Paul, MN, USA
| | - Marjorie D Matocq
- Department of Natural Resources and Environmental Science; Program in Ecology, Evolution, and Conservation Biology, University of Nevada, Reno, NV, USA
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11
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Horton BM, Ryder TB, Moore IT, Balakrishnan CN. Gene expression in the social behavior network of the wire-tailed manakin (Pipra filicauda) brain. GENES BRAIN AND BEHAVIOR 2019; 19:e12560. [PMID: 30756473 DOI: 10.1111/gbb.12560] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/06/2018] [Revised: 01/22/2019] [Accepted: 02/10/2019] [Indexed: 12/16/2022]
Abstract
The vertebrate basal forebrain and midbrain contain a set of interconnected nuclei that control social behavior. Conserved anatomical structures and functions of these nuclei have now been documented among fish, amphibians, reptiles, birds and mammals, and these brain regions have come to be known as the vertebrate social behavior network (SBN). While it is known that nuclei (nodes) of the SBN are rich in steroid and neuropeptide activity linked to behavior, simultaneous variation in the expression of neuroendocrine genes among several SBN nuclei has not yet been described in detail. In this study, we use RNA-seq to profile gene expression across seven brain regions representing five nodes of the vertebrate SBN in a passerine bird, the wire-tailed manakin Pipra filicauda. Using weighted gene co-expression network analysis, we reconstructed sets of coregulated genes, showing striking patterns of variation in neuroendocrine gene expression across the SBN. We describe regional variation in gene networks comprising a broad set of hormone receptors, neuropeptides, steroidogenic enzymes, catecholamines and other neuroendocrine signaling molecules. Our findings show heterogeneous patterns of brain gene expression across nodes of the avian SBN and provide a foundation for future analyses of how the regulation of gene networks may mediate social behavior. These results highlight the importance of region-specific sampling in studies of the mechanisms of behavior.
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Affiliation(s)
- Brent M Horton
- Department of Biology, Millersville University, Millersville, Pennsylvania
| | - Thomas B Ryder
- Migratory Bird Center, Smithsonian Conservation Biology Institute, Front Royal, Virginia
| | - Ignacio T Moore
- Department of Biological Sciences, Virginia Tech, Blacksburg, Virginia
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12
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13
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14
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Kasper C, Colombo M, Aubin-Horth N, Taborsky B. Brain activation patterns following a cooperation opportunity in a highly social cichlid fish. Physiol Behav 2018; 195:37-47. [DOI: 10.1016/j.physbeh.2018.07.025] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/12/2018] [Revised: 07/21/2018] [Accepted: 07/25/2018] [Indexed: 11/24/2022]
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15
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Dantzer B, Rubenstein DR. Introduction to Symposium: The Developmental and Proximate Mechanisms Causing Individual Variation in Cooperative Behavior. Integr Comp Biol 2017; 57:560-565. [PMID: 28957528 DOI: 10.1093/icb/icx093] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Nearly all animals interact with members of their own species at some point during their lives. These behavioral interactions range from courtship, mating, and parental care to the complex cooperative behavior among related or unrelated individuals in group-living species. A number of theoretical models have attempted to explain how cooperation can evolve through natural selection. Although tremendously influential in animal behavior research, these traditional models have largely ignored individual variation in cooperative behavior and its underlying developmental and proximate mechanisms. However, a set of emerging models suggest that the evolution of cooperation can be heavily influenced by the degree of individual variation in cooperative behavior, as well as the complexity of the underlying mechanisms. Yet, while theoreticians argue the importance of studying individual variation in cooperation and the mechanisms underlying it, empiricists have not focused upon these aspects. The main objectives of our symposium at the 2017 meeting of the Society for Integrative and Comparative Biology is to establish new research avenues to study variation in cooperative behavior using both proximate and ultimate explanations and to produce a road map to study the developmental and proximate mechanisms in generating individual variation in cooperative behavior. This symposium brought together empiricists and theoreticians investigating cooperative behavior in diverse taxa and across multiple levels of analysis. Here we briefly describe the rationale for this symposium and why we thought it was needed as well as provide a brief overview of the contributions.
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Affiliation(s)
- Ben Dantzer
- Department of Psychology, University of Michigan, Ann Arbor, MI 48109, USA.,Department of Ecology and Evolutionary Biology, University of Michigan, Ann Arbor, MI 48109, USA
| | - Dustin R Rubenstein
- Department of Ecology, Evolution and Environmental Biology, Columbia University, New York, NY 10027, USA.,Center for Integrative Animal Behavior, Columbia University, New York, NY 10027, USA
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16
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Shared sociogenetic basis of honey bee behavior and human risk for autism. Proc Natl Acad Sci U S A 2017; 114:9502-9504. [PMID: 28851832 DOI: 10.1073/pnas.1712292114] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/18/2022] Open
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17
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Reddon AR, O'Connor CM, Nesjan E, Cameron J, Hellmann JK, Ligocki IY, Marsh-Rollo SE, Hamilton IM, Wylie DR, Hurd PL, Balshine S. Isotocin neuronal phenotypes differ among social systems in cichlid fishes. ROYAL SOCIETY OPEN SCIENCE 2017; 4:170350. [PMID: 28573041 PMCID: PMC5451842 DOI: 10.1098/rsos.170350] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 04/12/2017] [Accepted: 04/20/2017] [Indexed: 06/07/2023]
Abstract
Social living has evolved numerous times across a diverse array of animal taxa. An open question is how the transition to a social lifestyle has shaped, and been shaped by, the underlying neurohormonal machinery of social behaviour. The nonapeptide neurohormones, implicated in the regulation of social behaviours, are prime candidates for the neuroendocrine substrates of social evolution. Here, we examined the brains of eight cichlid fish species with divergent social systems, comparing the number and size of preoptic neurons that express the nonapeptides isotocin and vasotocin. While controlling for the influence of phylogeny and body size, we found that the highly social cooperatively breeding species (n = 4) had fewer parvocellular isotocin neurons than the less social independently breeding species (n = 4), suggesting that the evolutionary transition to group living and cooperative breeding was associated with a reduction in the number of these neurons. In a complementary analysis, we found that the size and number of isotocin neurons significantly differentiated the cooperatively breeding from the independently breeding species. Our results suggest that isotocin is related to sociality in cichlids and may provide a mechanistic substrate for the evolution of sociality.
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Affiliation(s)
- Adam R. Reddon
- Department of Biology, McGill University, Montreal, Quebec, Canada
- Department of Psychology, Neuroscience and Behaviour, McMaster University, Hamilton, Ontario, Canada
| | - Constance M. O'Connor
- Department of Psychology, Neuroscience and Behaviour, McMaster University, Hamilton, Ontario, Canada
- Wildlife Conservation Society Canada, Thunder Bay, Ontario, Canada
| | - Erin Nesjan
- Department of Biological Sciences, University of Alberta, Edmonton, Alberta, Canada
| | - Jason Cameron
- Department of Psychology, University of Alberta, Edmonton, Alberta, Canada
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Jennifer K. Hellmann
- Department of Evolution, Ecology, and Organismal Biology, The Ohio State University, Columbus, OH, USA
- Department of Animal Biology, University of Illinois, Urbana-Champaign, IL, USA
| | - Isaac Y. Ligocki
- Department of Evolution, Ecology, and Organismal Biology, The Ohio State University, Columbus, OH, USA
- Department of Neurobiology, Physiology and Behavior, University of California Davis, Davis, CA, USA
| | - Susan E. Marsh-Rollo
- Department of Psychology, Neuroscience and Behaviour, McMaster University, Hamilton, Ontario, Canada
| | - Ian M. Hamilton
- Department of Evolution, Ecology, and Organismal Biology, The Ohio State University, Columbus, OH, USA
- Department of Mathematics, The Ohio State University, Columbus, OH, USA
| | - Douglas R. Wylie
- Department of Psychology, University of Alberta, Edmonton, Alberta, Canada
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Peter L. Hurd
- Department of Psychology, University of Alberta, Edmonton, Alberta, Canada
- Neuroscience and Mental Health Institute, University of Alberta, Edmonton, Alberta, Canada
| | - Sigal Balshine
- Department of Psychology, Neuroscience and Behaviour, McMaster University, Hamilton, Ontario, Canada
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