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Male and female meadow voles Microtus pennsylvanicus respond differently to scent marks from the top- middle-, and bottom-scent donors of an over-mark

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Current Zoology 2011年第4期57卷 441-448页

作者： Michael H. FERKIN Nicholas J. HOBBS Benjamin D. FERKIN Adam C.FERKIN Daniel A. FERKIN Department of Biological Sciences The University of Memphis Ellington Hall Memphis TN 38152 USA

Previous studies have shown that individuals responded preferentially to the mark of the top-scent donor relative to that of the bottom-scent donor of an over-mark. However, terrestrial mammals are likely to encounter over-marks consisting of the scent marks of more than two same-sex conspecifics in the intersections of runways, near the nests of sexually receptive female conspecifics, and inside and along the borders of the territories of conspecifics. We determined how meadow voles, Microtus pennsylvanicus, respond to the marks of the top-, middle-, and bottom-scent donors of an over-mark. We tested the hypothesis that voles exposed to an over-mark will respond preferentially to the scent marks that were deposited more recently, the scent marks that were on top or near the top of the over-mark, compared to the scent marks that were deposited earlier or near the bot- tom of the over-mark. voles spent more time investigating the mark of the top-scent donor than that of the either the middle- or bottom-scent donor. However, males but not female voles spent more time investigating the middle-scent mark than the bot- tom-scent mark. We also tested the hypothesis that voles evaluate and respond to over-marks differently from single scent marks. voles spent more time investigating the marks of the top-, middle-, and bottom-scent donors compared to scent marks that were not part of the over-mark. voles can distinguish among the overlapping scent marks of three scent donors and sex differences exist in the values they appear to attach to each of these scent marks [Current Zoology 57 （4）： 441-448, 2011 ].

关键词： Over-marks voles Scent marks Olfactory communication

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Large manipulative experiments reveal complex effects of food supplementation on population dynamics of Brandt's voles

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Science China(Life Sciences) 2017年第8期60卷 911-920页

作者： Baofa Yin Guoliang Li Xinrong Wan Guozhen Shang Wanhong Wei Zhibin Zhang State Key Laboratory of Integrated Management of Pest Insects and Rodents Institute of ZoologyChinese Academy of Sciences College of Bioscience and Biotechnology Yangzhou University

Although food supplementation is well known to increase population density,there is still debate on the causative effects of food supplementation on reproduction,survival,and *** manipulative experiments,which exclude any confounding effects of dispersal and predation,are essential for clarifying the *** this study,we investigated the effects of food supplementation on Brandt's vole population dynamics and plant community in eight large enclosures(0.48 ha each) from2010 to *** supplementation showed significant positive effects on population density due to increases in recruitment;however,it showed a complex effect on survival of voles:positive in non-breeding seasons,but negative in breeding *** addition,food supplementation increased the quality of plants(as reflected by increased crude protein content),but decreased the quantity of less preferred plants in experimental ***,food seems to have direct positive effects on small rodents through improvement of food supply and indirect negative effects through food-induced density-dependent effects,and may have long-term effects on rodents through altering plant community composition and abundance.

关键词： demographic parameters direct and indirect effects food quantity and quality food supplementation plant communitycomposition population dynamics recruitment survival voles

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Relationship between El Nino /South Oscillation(ENSO) and population outbreaks of some lemmings and voles in Europe

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Chinese Science Bulletin 2001年第13期46卷 1067-1074页

作者： ZHANG ZhibinNational Key Laboratory of Integrated Management of Pest Insects and Rodents in Agriculture, Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China (e-mail: zhangzb@***) Chinese Acad Sci Inst Zool Natl Key Lab Integrated Management Pest Insect & Beijing 100080 Peoples R China

Ecologists have been puzzled by population cycles of lemmings and voles for the over 70 years. At present, our understanding and explanation to this phenomenon remain controversial. Recently, El Nino/South Oscillation has attracted attention of ecologists on its links with population outbreaks of terrestrial animals. This paper aims to investigate the statistical relationship between outbreaks of microtine rodents and ENSO events by scanning available literature. During 1862-1894, outbreaks of Norway lemmings in Norway tended to occur in the Southern Oscillation Index (SOI) peak years or 1 year after the SOI peak years with an approximate significance level (p = 0.057). During 1885-1931, outbreaks of voles in France tended to occur 1 year before the SOI peak years (p = 0.01). During 1946-1993, outbreaks of lemmings and voles in North Finland tended to occur 1 year before the SOI peak years with a significant level (p = 0.022); the peaks of population abundance corresponded well to the SOI trough years

关键词： lemmings voles microtine Europe population outbreaks El Nino/South Oscillation (ENSO) Southern Oscillation Index (SOI)

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Spontaneous emergence of overgrown molar teeth in a colony of Prairie voles(Microtus ochrogaster)

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International Journal of Oral Science 2015年第1期7卷 23-26页

作者： Andrew H Jheon Michaela Prochazkova Michael Sherman Devanand S Manoli Nirao M Shah Lawrence Carbone Ophir Klein Department of Orofacial Sciences and Program in Craniofacial and Mesenchymal Biology University of California San Francisco (UCSF) Department of Anthropology and Human Genetics Faculty of Science Charles University in Prague Laboratory Animal Resource Center UCSF Department of Psychiatry UCSF Department of Anatomy UCSF

Continuously growing incisors are common to all rodents, which include the Microtus genus of voles. However, unlike many rodents, voles also possess continuously growing molars. Here, we report spontaneous molar defects in a population of Prairie voles （Microtus ochrogaster）. We identified bilateral protuberances on the ventral surface of the mandible in several voles in our colony. In some cases, the protuberances broke through the cortical bone. The mandibular molars became exposed and infected, and the maxillary molars entered the cranial vault. Visualisation upon soft tissue removal and microcomputed tomography （microCT） analyses confirmed that the protuberances were caused by the overgrowth of the apical ends of the molar teeth. We speculate that the unrestricted growth of the molars was due to the misregulation of the molar dental stem cell niche. Further study of this molar phenotype may yield additional insight into stem cell regulation and the evolution and development of continuously growing teeth.

关键词： continuously growing teeth molar phenotype mutation stem cell regulation voles

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Impact of climate change on the small mammal community of the Yukon boreal forest

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Integrative Zoology 2019年第6期14卷 528-541页

作者： Charles J.KREBS Rudy BOONSTRA BScott GILBERT Alice J.KENNEY Stan BOUTIN Department of Zoology University of British ColumbiaVancouverBritish ColumbiaCanada Department of Biological Sciences University of Toronto ScarboroughTorontoOntarioCanada Renewable Resources Management Program Yukon CollegeWhitehorseYukonCanada Department of Biological Sciences University of AlbertaEdmontonAlbertaCanada

Long-term monitoring is critical to determine the stability and sustainability of wildlife populations,and if change has occurred,*** have followed population density changes in the small mammal community in the boreal forest of the southern Yukon for 46 years with density estimates by live trapping on 3-5 unmanipulated grids in spring and *** community consists of 10 species and was responsible for 9%of the energy flow in the herbivore component of this ecosystem from 1986 to 1996,but this increased to 38%from 2003 to *** mammals,although small in size,are large in the transfer of energy from plants to predators and *** species form the bulk of the *** was a shift in the dominant species from the 1970s to the 2000s,with Myodes rutilus increasing in relative abundance by 22%and Peromyscus maniculatus decreasing by 22%.From 2007 to 2018,Myodes comprised 63%of the catch,Peromyscus 20%,and Microtus species 17%.Possible causes of these changes involve climate change,which is increasing primary production in this boreal forest,and an associated increase in the abundance of 3 rodent predators,marten(Martes americana),ermine(Mustela ermine)and coyotes(Canis latrans).Following and understanding these and potential future changes will require long-term monitoring studies on a large scale to measure metapopulation *** small mammal community in northern Canada is being affected by climate change and cannot remain sta*** will be critically dependent on food-web interactions that are species-specific.

关键词： community change long-term study population cycles trophic dynamics voles

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Evolutionary diversity as a catalyst for biological discovery

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Integrative Zoology 2018年第6期13卷 616-633页

作者： Zachary V.JOHNSON Larry J.YOUNG School of Biological Sciences Georgia Institute of TechnologyAtlantaGeorgiaUSA Center for Translational Social Neuroscience Silvio O.Conte Center for Oxytocin and Social CognitionDepartment of Psychiatry and Behavioral SciencesYerkes National Primate Research CenterEmory UniversityAtlantaGeorgiaUSA

The tremendous diversity of animal behaviors has inspired generations of scientists from an array of biological *** complement investigations of ecological and evolutionary factors contributing to behavioral evolution,modern sequencing,gene editing,computational and neuroscience tools now provide a means to discover the proximate mechanisms upon which natural selection acts to generate behavioral *** behaviors are motivated behaviors that can differ tremendously between closely related species,suggesting phylogenetic plasticity in their underlying biological *** addition,convergent evolution has repeatedly given rise to similar forms of social behavior and mating systems in distantly related *** behavioral divergence and convergence provides an entry point for understanding the neurogenetic mechanisms contributing to behavioral *** argue that the greatest strides in discovering mechanisms contributing to social behavioral diversity will be achieved through integration of interdisciplinary comparative approaches with modern tools in diverse species *** review recent advances and future potential for discovering mechanisms underlying social behavioral variation;highlighting patterns of social behavioral evolution,oxytocin and vasopressin neuropeptide systems,genetic/transcriptional“toolkits,”modern experimental tools,and alternative species systems,with particular emphasis on Microtine rodents and Lake Malawi cichlid fishes.

关键词： cichlids oxytocin and vasopressin social behavior toolkits voles

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Small mammal community response to early meadow–forest succession

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Forest Ecosystems 2017年第3期4卷 211-220页

作者： Linas Bal?iauskas Au?ra ?epukien? Laima Bal?iauskien? Nature Research Centre

Background： With farmland afforestation becoming common policy in many European Union countries, we studied how early forest succession（from meadow to young stand） influences small mammal species composition, diversity,abundance and biomass. Despite numerous investigations into forest succession, almost no attention has been given to the small mammal community change in the early-successional forest ecosystems, starting with the pre-forest habitat and ending with stand formation and the establishment of tree dominance. We compared small mammal communities in meadows at the initial stage of regrowth（with saplings less than 10 cm in height）, in young forest（5–10 years old） and more advanced forest（15–20 years） in both cases of human-induced forest succession, where the trees had been planted, and natural forest succession, where natural regrowth of meadows had ***： The greatest diversity of small mammal species was recorded in the meadow（H = 2.95）, with a lower diversity found in the young forest（H = 2.61） and even lower in the advanced forest（H = 2.04）, the last habitat being the most monodominantic. The order of species dominance from Microtus sp.（M. arvalis, M. agrestis）, Myodes glareolus, Apodemus flavicollis, Sorex araneus, A. agrarius in the meadow changed to M. glareolus, S. araneus, M. arvalis,M. agrestis in the young forest and to M. glareolus, A. flavicollis, S. araneus in the advanced forest. The lowest relative abundance of small mammals was recorded in the meadow（18.19 ± 2.27 ind. Per 100 trap-days）, with Microtus voles being the most abundant. Relative abundance was higher in the young forest（22.72 ± 2.25 ind. Per 100 trap-days）,with Myodes glareolus being the most abundant（7.59 ± 0.96 ind. Per 100 trap-days） and at its highest in the advanced forest（23.91 ± 2.77 ind. Per 100 trap-days）, again with M. glareolus being the most abundant（15.54 ± 2.35 ind. Per100 trap-days）.Conclusions： Thus, our analysis suggests that that during early meadow-f

关键词： Afforestation voles Mice Diversity Abundance Biomass

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