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Effects of predator odor on anti-predation behavior and hypothalamic c-fos mRNA expression of Chinese mole shrew. Appl Anim Behav Sci 2022. [DOI: 10.1016/j.applanim.2022.105781] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
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2
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Zhao J, Li G, Lu W, Huang S, Zhang Z. Dominant and Subordinate Relationship Formed by Repeated Social Encounters Alters Gut Microbiota in Greater Long-Tailed Hamsters. MICROBIAL ECOLOGY 2020; 79:998-1010. [PMID: 31807860 DOI: 10.1007/s00248-019-01462-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/10/2019] [Accepted: 11/08/2019] [Indexed: 06/10/2023]
Abstract
Social stress can dramatically influence the health of animals via communication between gut microbiota and the HPA system. However, this effect has been rarely investigated among different social ranked animals after chronic repeated social encounters. In this study, we evaluated changes and differences in microbiota among control, dominant, and subordinate male greater long-tailed hamsters (Tscherskia triton) over 28 successive days of repeated social encounter. Our results indicated that as compared with the control group, short-term repeated social encounters significantly altered fecal microbiota of subordinate hamsters, while chronic repeated social encounters altered colonic mucosa-associated microbiota of both dominant and subordinate hamsters. Fecal microbiota showed a transition in composition and diversity on day 2 for the subordinate group but on day 4 for the control and dominant groups under repeated encounters. Compared with their baseline, genus Lactobacillus increased in both dominant and subordinate groups, while genus Bifidobacterium increased in the subordinate group and genus Adlercreutzia increased in the dominant group. Our results suggest that chronic repeated social encounter can alter diversity and composition of gut microbiota of hamsters in both feces and colonic mucosa, but the latter performed better in reflecting the effects of chronic stress on microbiota in this species. Future studies should focus on elucidating how these microbiota alterations may affect animal behavior and fitness.
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Affiliation(s)
- Jidong Zhao
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Guoliang Li
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Wei Lu
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Shuli Huang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China
- University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China
| | - Zhibin Zhang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents, Institute of Zoology, Chinese Academy of Sciences, Beijing, 100101, People's Republic of China.
- CAS Center for Excellence in Biotic Interactions, University of Chinese Academy of Sciences, Beijing, 100049, People's Republic of China.
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3
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CHEN Y, WANG D, LI N, HU X, REN F, HAO W, SONG Y, LIU X. Kinship analysis reveals reproductive success skewed toward overwintered Brandt's voles in semi‐natural enclosures. Integr Zool 2019; 14:435-445. [DOI: 10.1111/1749-4877.12330] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Affiliation(s)
- Yan CHEN
- State Key Laboratory for Biology of Plant Disease and Insect PestsInstitute of Plant Protection, Chinese Academy of Agricultural Sciences Beijing China
- College of Life Sciences, Sichuan University Chengdu China
| | - Dawei WANG
- State Key Laboratory for Biology of Plant Disease and Insect PestsInstitute of Plant Protection, Chinese Academy of Agricultural Sciences Beijing China
| | - Ning LI
- State Key Laboratory for Biology of Plant Disease and Insect PestsInstitute of Plant Protection, Chinese Academy of Agricultural Sciences Beijing China
| | - Xiangfa HU
- State Key Laboratory for Biology of Plant Disease and Insect PestsInstitute of Plant Protection, Chinese Academy of Agricultural Sciences Beijing China
| | - Fei REN
- State Key Laboratory for Biology of Plant Disease and Insect PestsInstitute of Plant Protection, Chinese Academy of Agricultural Sciences Beijing China
| | - Weili HAO
- State Key Laboratory for Biology of Plant Disease and Insect PestsInstitute of Plant Protection, Chinese Academy of Agricultural Sciences Beijing China
| | - Ying SONG
- State Key Laboratory for Biology of Plant Disease and Insect PestsInstitute of Plant Protection, Chinese Academy of Agricultural Sciences Beijing China
| | - Xiaohui LIU
- State Key Laboratory for Biology of Plant Disease and Insect PestsInstitute of Plant Protection, Chinese Academy of Agricultural Sciences Beijing China
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Wang D, Li N, Tian L, Ren F, Li Z, Chen Y, Liu L, Hu X, Zhang X, Song Y, Hut RA, Liu XH. Dynamic expressions of hypothalamic genes regulate seasonal breeding in a natural rodent population. Mol Ecol 2019; 28:3508-3522. [PMID: 31233652 DOI: 10.1111/mec.15161] [Citation(s) in RCA: 17] [Impact Index Per Article: 3.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/02/2019] [Revised: 05/22/2019] [Accepted: 06/04/2019] [Indexed: 12/31/2022]
Abstract
Seasonal breeding is a universal reproductive strategy in many animals. Hypothalamic genes, especially type 2 and 3 iodothyronine deiodinases (Dio2/3), RFamide-related peptide 3 (Rfrp-3), kisspeptin (Kiss-1) and gonadotropin-releasing hormone (GnRH), are involved in a photoperiodic pathway that encodes seasonal signals from day length in many vertebrate species. However, the seasonal expression patterns of these genes in wild mammals are less studied. Here, we present a four-year field investigation to reveal seasonal rhythm and age-dependent reproductive activity in male Brandt's voles (Lasiopodomys brandtii) and to detect relationships among seasonal expression profiles of hypothalamic genes, testicular activity, age and annual day length. From breeding season (April) to nonbreeding season (October), adult male voles displayed a synchronous peak in gonadal activity with annual day length around summer solstice, which was jointly caused by age structure shifts and age-dependent gonadal development patterns. Overwintered males maintained reproductive activity until late in the breeding season, whereas most newborn males terminated gonadal development completely, except for a minority of males born early in spring. Consistently, the synchronous and opposite expression profiles of Dio2/3 suggest their central function to decode photoperiodic signals and to predict the onset of the nonbreeding season. Moreover, changes in Dio2/3 signals may guide the actions of Kiss-1 and Rfrp-3 to regulate the age-dependent divergence of reproductive strategy in wild Brandt's vole. Our results provide evidence on how hypothalamic photoperiod genes regulate seasonal breeding in a natural rodent population.
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Affiliation(s)
- Dawei Wang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ning Li
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Lin Tian
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Fei Ren
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Zhengguang Li
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Yan Chen
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.,College of Life Sciences, Sichuan University, Chengdu, China
| | - Lan Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China.,College of Life Sciences, Sichuan University, Chengdu, China
| | - Xiangfa Hu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Xuechang Zhang
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Ying Song
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
| | - Roelof A Hut
- Chronobiology Unit, Groningen Institute for Evolutionary Life Sciences, University of Groningen, Groningen, The Netherlands
| | - Xiao-Hui Liu
- State Key Laboratory for Biology of Plant Diseases and Insect Pests, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, Beijing, China
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5
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Blondel DV, Wallace GN, Calderone S, Gorinshteyn M, St Mary CM, Phelps SM. Effects of population density on corticosterone levels of prairie voles in the field. Gen Comp Endocrinol 2016; 225:13-22. [PMID: 26342968 PMCID: PMC4684476 DOI: 10.1016/j.ygcen.2015.09.002] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/05/2015] [Revised: 08/12/2015] [Accepted: 09/01/2015] [Indexed: 11/30/2022]
Abstract
High population density is often associated with increased levels of stress-related hormones, such as corticosterone (CORT). Prairie voles (Microtus ochrogaster) are a socially monogamous species known for their large population density fluctuations in the wild. Although CORT influences the social behavior of prairie voles in the lab, the effect of population density on CORT has not previously been quantified in this species in the field. We validated a non-invasive hormone assay for measuring CORT metabolites in prairie vole feces. We then used semi-natural enclosures to experimentally manipulate population density, and measured density effects on male space use and fecal CORT levels. Our enclosures generated patterns of space use and social interaction that were consistent with previous prairie vole field studies. Contrary to the positive relationship between CORT and density typical of other taxa, we found that lower population densities (80 animals/ha) produced higher fecal CORT than higher densities (240/ha). Combined with prior work in the lab and field, the data suggest that high prairie vole population densities indicate favorable environments, perhaps through reduced predation risk. Lastly, we found that field animals had lower fecal CORT levels than laboratory-living animals. The data emphasize the usefulness of prairie voles as models for integrating ecological, evolutionary, and mechanistic questions in social behavior.
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Affiliation(s)
- Dimitri V Blondel
- Department of Biology, University of Florida, Gainesville, FL 32611, USA; Department of Integrative Biology, University of Texas at Austin, Austin, TX 78712, USA; Department of Evolutionary Anthropology, Duke University, Durham, NC 27708, USA.
| | - Gerard N Wallace
- Department of Integrative Biology, University of Texas at Austin, Austin, TX 78712, USA
| | - Stefanie Calderone
- Department of Biology, University of Florida, Gainesville, FL 32611, USA; Department of Integrative Biology, University of Texas at Austin, Austin, TX 78712, USA
| | - Marija Gorinshteyn
- Department of Biology, University of Florida, Gainesville, FL 32611, USA; Department of Integrative Biology, University of Texas at Austin, Austin, TX 78712, USA
| | - Colette M St Mary
- Department of Biology, University of Florida, Gainesville, FL 32611, USA
| | - Steven M Phelps
- Department of Integrative Biology, University of Texas at Austin, Austin, TX 78712, USA
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Shen W, Zhang XY, Liu DZ, Wang DH. Hormones orchestrated pre- and post-copulatory sexual traits in male Mongolian gerbils. Physiol Behav 2015; 143:90-6. [DOI: 10.1016/j.physbeh.2015.02.041] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/18/2014] [Revised: 02/16/2015] [Accepted: 02/24/2015] [Indexed: 01/13/2023]
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7
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Pan Y, Li M, Lieberwirth C, Wang Z, Zhang Z. Social defeat and subsequent isolation housing affect behavior as well as cell proliferation and cell survival in the brains of male greater long-tailed hamsters. Neuroscience 2014; 265:226-37. [DOI: 10.1016/j.neuroscience.2014.01.056] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/12/2013] [Revised: 01/28/2014] [Accepted: 01/29/2014] [Indexed: 02/08/2023]
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8
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Sociality and oxytocin and vasopressin in the brain of male and female dominant and subordinate mandarin voles. J Comp Physiol A Neuroethol Sens Neural Behav Physiol 2013; 200:149-59. [PMID: 24292210 DOI: 10.1007/s00359-013-0870-2] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/16/2013] [Revised: 11/14/2013] [Accepted: 11/16/2013] [Indexed: 12/12/2022]
Abstract
The dominant-subordinate hierarchy in animals often needs to be established via agonistic encounters and consequently affects reproduction and survival. Differences in brain neuropeptides and sociality among dominant and subordinate males and females remain poorly understood. Here we explore neuropeptide levels and sociality during agonistic encounter tests in mandarin voles. We found that dominant mandarin voles engaged in higher levels of approaching, investigating, self-grooming and exploring behavior than subordinates. Dominant males habituated better to a stimulus vole than dominant females. Dominant males displayed significantly less oxytocin-immunoreactive neurons in the paraventricular nuclei and more vasopressin-immunoreactive neurons in the paraventricular nuclei, supraoptic nuclei, and the lateral and anterior hypothalamus than subordinates. Dominant females displayed significantly more vasopressin-immunoreactive neurons in the lateral hypothalamus and anterior hypothalamus than subordinates. Sex differences were found in the level of oxytocin and vasopressin. These results indicate that distinct parameters related to central nervous oxytocin and vasopressin are associated with behaviors during agonistic encounters in a sex-specific manner in mandarin voles.
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9
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Wang D, Zhang J, Zhang Z. Effect of testosterone and melatonin on social dominance and agonistic behavior in male Tscheskia triton. Behav Processes 2011; 89:271-7. [PMID: 22206994 DOI: 10.1016/j.beproc.2011.12.010] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/21/2011] [Revised: 10/24/2011] [Accepted: 12/11/2011] [Indexed: 02/04/2023]
Abstract
Social dominance and agonistic behavior play important roles in animal societies. Melatonin and testosterone are closely related to social dominance and agonistic behavior in rodents, but interactions between both of them remain unknown. In this study we investigated the effects of testosterone and melatonin by manipulating photoperiod and castration on social dominance and agonistic behavior in male Tscheskia triton. Castration significantly decreases social dominance of both short- and long-day males, suggesting that testosterone benefits social dominance of males in both breeding and non-breeding seasons. In intact conditions, long-day males tended to dominate short-day males, suggesting that the effect of testosterone on social dominance was a little stronger than melatonin. However, castrated short-day males became dominant over their castrated long-day opponents meaning that high melatonin levels obviously benefit social dominance in males. Hormone implantation indicated that testosterone had no effect on non-breeding condition, but that melatonin was important during the breeding season. Our results indicate that both testosterone and melatonin are important in determining social dominance in male hamsters, and the effect of testosterone appears to be stronger than melatonin. Testosterone is responsible for aggression and social dominance in male hamsters during the breeding season, while melatonin regulates behavior during non-breeding, probably due to the different seasonal secretory patterns of the hormones.
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Affiliation(s)
- Dawei Wang
- State Key Laboratory of Integrated Management of Pest Insects and Rodents in Agriculture, Institute of Zoology, Chinese Academy of Sciences, Beijing, China
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10
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Wang D, Li N, Liu M, Huang B, Liu Q, Liu X. Behavioral evaluation of quinestrol as a sterilant in male Brandt's voles. Physiol Behav 2011; 104:1024-30. [PMID: 21763706 DOI: 10.1016/j.physbeh.2011.06.024] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2011] [Revised: 06/02/2011] [Accepted: 06/29/2011] [Indexed: 11/25/2022]
Abstract
The theoretical, ecological, physiological, and mathematical aspects of fertility control in mammals have already been well studied, but little attention has been given to the behavioral effects, especially in rodents. We investigated the effects of quinestrol, a synthetic estradiol analog, on social behavior and reproductive physiology in male Brandt's voles (Lasiopodomys brandtii). Over seven successive days, four concentration gradients of quinestrol (none, 0.001%, 0.003%, and 0.006%) were separately mixed into feed and provided to male Brandt's voles. Reproductive parameters, including the reproductive organ indexes, testosterone level and reproductive ability, were observed and collected 2 weeks after finished feeding treatment and again after 4 weeks. Dyadic social encounters and female preferences were then recorded for the control males (no quinestrol) and the highest concentration group (0.006%). Results showed that quinestrol reduced the consumption of feed. Physiological data revealed that quinestrol had also effectively reduced the reproductive organs indexes, testosterone levels, female pregnancy rates and litter size. This phenomenon was especially evident in the highest concentration group only after 2 weeks of feeding. Behavioral results showed that both frequency and duration of female preference were unbiased between control and treated males. In social conflict tests, control pairs (CC) had lower latency toward initial attack than treated pairs (TT) and pairs of one control and one treated male (CT). Among the three pairs, there was no evident difference in patterns of mutual attack and agonistic behavior. In CT pairs, sterile males have the same winning rate and agonistic behavior as control males. Our data revealed that quinestrol has anti-fertility capabilities with little behavioral side effects on Brandt's voles, which suggested quinestrol's potential as a sterilant for Brandt's voles. The palatability, however, should be improved before field practice.
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Affiliation(s)
- Dawei Wang
- Key Laboratory of Weed and Rodent Biology and Management, Institute of Plant Protection, Chinese Academy of Agricultural Sciences, 2 Yuanmingyuan West Road, Beijing, 100193, China
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Pan Y, Xu L, Young KA, Wang Z, Zhang Z. Agonistic encounters and brain activation in dominant and subordinate male greater long-tailed hamsters. Horm Behav 2010; 58:478-84. [PMID: 20471386 PMCID: PMC2917492 DOI: 10.1016/j.yhbeh.2010.05.001] [Citation(s) in RCA: 42] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 03/10/2010] [Revised: 04/28/2010] [Accepted: 05/04/2010] [Indexed: 11/17/2022]
Abstract
During an agonistic encounter test, dominant male greater long-tailed hamsters (Tscheskia triton) initiated attacks sooner and displayed higher levels of aggression and flank marking behavior than their subordinate counterparts. Accordingly, subordinate males exhibited more defensive behavior than dominant ones. Specific patterns of neuronal activation, measured by Fos-immunoreactive staining (Fos-ir), were found in the hamster brain following agonistic interactions. Increased Fos-ir was observed in the bed nucleus of the stria terminalis (BST), ventromedial hypothalamus (VMH), and medial (MeA) and anterior cortical (ACo) nuclei of the amygdala (AMYG) in both dominant and subordinate males. In contrast, dominant males had significantly higher Fos-ir densities in the medial preoptic area (MPOA) than subordinate males, whereas subordinate males expressed higher densities of Fos-ir in the anterior hypothalamus (AH) and central nucleus of the amygdala (CeA). Additionally, Fos-ir levels in the MPOA were significantly correlated with aggression and Fos-ir levels in the AH and CeA were correlated with defensive behavior. Together, our data indicate distinct patterns of neuronal activation associated with agonistic encounters in a behavior-specific manner in male greater long-tailed hamsters.
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Affiliation(s)
- Yongliang Pan
- State Key Laboratory of Integrated Management of Pest Insects and Rodents in Agriculture, Institute of Zoology, Chinese Academy of Sciences, Datun Road, Chaoyang District, Beijing 100101, PR China
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Xu L, Pan Y, Young KA, Wang Z, Zhang Z. Oxytocin and vasopressin immunoreactive staining in the brains of Brandt's voles (Lasiopodomys brandtii) and greater long-tailed hamsters (Tscherskia triton). Neuroscience 2010; 169:1235-47. [PMID: 20573572 DOI: 10.1016/j.neuroscience.2010.05.064] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/16/2010] [Revised: 05/24/2010] [Accepted: 05/26/2010] [Indexed: 10/19/2022]
Abstract
Immunoreactive (ir) staining of the neuropeptides oxytocin (OT) and vasopressin (AVP) was performed in the brains of Brandt's voles (Lasiopodomys brandtii) and greater long-tailed hamsters (Tscherskia triton)-two species that differ remarkably in social behaviors. Social Brandt's voles had higher densities of OT-ir cells in the medial preoptic area (MPOA) and medial amygdala (MeA) as well as higher densities of AVP-ir cells in the lateral hypothalamus (LH) compared to solitary greater long-tailed hamsters. In contrast, the hamsters had higher densities of OT-ir cells in the anterior hypothalamus (AH) and LH and higher densities of AVP-ir cells in the MPOA than the voles. OT-ir and AVP-ir fibers were also found in many forebrain areas with subtle species differences. Given the roles of OT and AVP in the regulation of social behaviors in other rodent species, our data support the hypothesis that species-specific patterns of central OT and AVP pathways may underlie species differences in social behaviors. However, despite a higher density of OT-ir cells in the paraventricular nucleus of the hypothalamus (PVN) in females than in males in both species, no other sex differences were found in OT-ir or AVP-ir staining. These data failed to support our prediction that a sexually dimorphic pattern of neuropeptide staining in the brain is more apparent in Brandt's voles than in greater long-tailed hamsters.
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Affiliation(s)
- L Xu
- State Key Laboratory of Integrated Management of Pest Insects and Rodents in Agriculture, Institute of Zoology, Chinese Academy of Sciences, Datun Road, Chaoyang District, Beijing 100101, PR China
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13
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Sex differences in the excretion of fecal glucocorticoid metabolites in the Syrian hamster. J Comp Physiol B 2010; 180:919-25. [DOI: 10.1007/s00360-010-0467-9] [Citation(s) in RCA: 21] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2009] [Revised: 03/07/2010] [Accepted: 03/08/2010] [Indexed: 10/19/2022]
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