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Søren Bondrup-nielsen - One of the best experts on this subject based on the ideXlab platform.

  • Emigration of meadow voles, Microtus pennsylvanicus : the effect of sex ratio
    Oikos, 1992
    Co-Authors: Søren Bondrup-nielsen
    Abstract:

    Exposure to testosterone has been suggested to serve as a trigger for dispersal of female mammals. In male biased litters there is a high probability that a female will be positioned in utero next to one or two males, and hence be exposed to the testosterone produced by the adjacent males. Sex ratio in litters of grey-sided voles, Clethrionomys rufocanus, successfully explain a major portion of the variation in dispersal behaviour of females of this species, thus providing indirect evidence that exposure to testosterone predisposes the females to disperse. Meadow voles, Microtus pennsylvanicus, were raised under laboratory conditions, and the emigration tendency of the young was tested using outdoor enclosures with exit gates

Theresa M. Lee - One of the best experts on this subject based on the ideXlab platform.

  • Female meadow voles (Microtus pennsylvanicus) demonstrate same-sex partner preferences.
    Journal of comparative psychology (Washington D.C. : 1983), 2003
    Co-Authors: Karen J. Parker, Theresa M. Lee
    Abstract:

    Female meadow voles (Microtus pennsylvanicus) are territorial during warm months but demonstrate social tolerance under low temperatures. In spring, females nest together and some pairs participate in communal nursing and rearing of young. Because communal nursing involves significant cooperation, selective pair-bonds may develop between 2 nestmates. Using a choice apparatus, the authors determined that (a) captive females demonstrated partner preferences for a nestmate; (b) partner preferences were enduring and persisted after dyadic separation; and (c) following the loss of a nestmate, females did not develop preferences for a new nestmate, even after extended cohabitation. Data support the hypothesis that captive meadow voles develop selective and enduring same-sex social bonds that may, under free-living conditions, facilitate communal nesting and cooperative rearing of young.

  • paternal behavior is associated with central neurohormone receptor binding patterns in meadow voles Microtus pennsylvanicus
    Behavioral Neuroscience, 2001
    Co-Authors: Karen J. Parker, Lisa F Kinney, Katie M Phillips, Theresa M. Lee
    Abstract:

    Paternal and nonpaternal voles (Microtus) have different arginine-vasopressin (AVP) and oxytocin (OT) receptor patterns in the extended amygdala, a neural pathway associated with parental behavior, Using receptor autoradiography, the authors examined whether AVP and OT receptor patterns were associated with facultative paternal behavior in either sexually and parentally inexperienced or experienced meadow voles (Microtus pennsylvanicus). Experienced, in contrast to intexperienced, males had less AVP binding in the lateral septum (LS), more AVP binding in the anterior olfactory nucleus (AON), and more OT binding in the AON, bed nucleus of the stria terminalis, LS, and lateral amygdala. Thus, specific AVP receptor patterns, which co-occur with paternal care in consistently paternal vales also may he associated with paternal care (when present) in typically nonpaternal species. This study also demonstrated a possible relationship between OT receptor patterns and paternal state in male mammals.

Martin Kavaliers - One of the best experts on this subject based on the ideXlab platform.

  • Plasma Testosterone Levels Are Related to Various Aspects of Locomotor Activity in Wild-Caught Male Meadow Voles (Microtus pennsylvanicus)
    Physiology & behavior, 1998
    Co-Authors: T.s Perrot-sinal, Duncan G. L. Innes, Martin Kavaliers, Klaus-peter Ossenkopp
    Abstract:

    Abstract PERROT-SINAL, T. S., D. INNES, M. KAVALIERS AND K.-P. OSSENKOPP. Plasma testosterone levels are related to various aspects of locomotor activity in wild-caught male meadow voles (Microtus pennsylvanicus) . Physiol Behav 64(1) 31–36, 1998. The relationship between plasma testosterone levels and locomotor activity in wild-caught sexually mature male meadow voles ( Microtus pennsylvanicus ) was assessed in the laboratory. Several aspects of locomotor activity were monitored for 1 h on two consecutive days using the automated Digiscan activity monitoring system. Plasma testosterone levels were determined immediately following the second day of activity monitoring. Significant Pearson correlations were obtained between plasma testosterone levels and total distance traveled [ r (10) = 0.55, p r (10) = 0.55, p

  • Spatial water maze learning using celestial cues by the meadow vole, Microtus pennsylvanicus
    Behavioural brain research, 1994
    Co-Authors: Martin Kavaliers, Liisa A.m. Galea
    Abstract:

    The Morris water maze is widely used to evaluate to evaluate the spatial learning ability of rodents under laboratory settings. The present study demonstrates that reproductive male meadow voles, Microtus pennsylvanicus, are able to acquire and retain a spatial water maze task using celestial cues. Voles were able to acquire a modified outdoor Morris water maze task over 4 trials per day, whereby they had to learn and remember the location of a submerged hidden platform, using the position of the sun and associated celestial cues. Their proficiency on this task was related to the availability of the celestial cues, with voles displaying significantly poorer spatial navigation on overcast than clear days and when the testing time (and position of the sun and associated celestial cues) was shifted from morning to afternoon. These findings with meadow voles support the ecological relevance of the water maze task.

Klaus-peter Ossenkopp - One of the best experts on this subject based on the ideXlab platform.

  • Plasma Testosterone Levels Are Related to Various Aspects of Locomotor Activity in Wild-Caught Male Meadow Voles (Microtus pennsylvanicus)
    Physiology & behavior, 1998
    Co-Authors: T.s Perrot-sinal, Duncan G. L. Innes, Martin Kavaliers, Klaus-peter Ossenkopp
    Abstract:

    Abstract PERROT-SINAL, T. S., D. INNES, M. KAVALIERS AND K.-P. OSSENKOPP. Plasma testosterone levels are related to various aspects of locomotor activity in wild-caught male meadow voles (Microtus pennsylvanicus) . Physiol Behav 64(1) 31–36, 1998. The relationship between plasma testosterone levels and locomotor activity in wild-caught sexually mature male meadow voles ( Microtus pennsylvanicus ) was assessed in the laboratory. Several aspects of locomotor activity were monitored for 1 h on two consecutive days using the automated Digiscan activity monitoring system. Plasma testosterone levels were determined immediately following the second day of activity monitoring. Significant Pearson correlations were obtained between plasma testosterone levels and total distance traveled [ r (10) = 0.55, p r (10) = 0.55, p

Karen J. Parker - One of the best experts on this subject based on the ideXlab platform.

  • Female meadow voles (Microtus pennsylvanicus) demonstrate same-sex partner preferences.
    Journal of comparative psychology (Washington D.C. : 1983), 2003
    Co-Authors: Karen J. Parker, Theresa M. Lee
    Abstract:

    Female meadow voles (Microtus pennsylvanicus) are territorial during warm months but demonstrate social tolerance under low temperatures. In spring, females nest together and some pairs participate in communal nursing and rearing of young. Because communal nursing involves significant cooperation, selective pair-bonds may develop between 2 nestmates. Using a choice apparatus, the authors determined that (a) captive females demonstrated partner preferences for a nestmate; (b) partner preferences were enduring and persisted after dyadic separation; and (c) following the loss of a nestmate, females did not develop preferences for a new nestmate, even after extended cohabitation. Data support the hypothesis that captive meadow voles develop selective and enduring same-sex social bonds that may, under free-living conditions, facilitate communal nesting and cooperative rearing of young.

  • paternal behavior is associated with central neurohormone receptor binding patterns in meadow voles Microtus pennsylvanicus
    Behavioral Neuroscience, 2001
    Co-Authors: Karen J. Parker, Lisa F Kinney, Katie M Phillips, Theresa M. Lee
    Abstract:

    Paternal and nonpaternal voles (Microtus) have different arginine-vasopressin (AVP) and oxytocin (OT) receptor patterns in the extended amygdala, a neural pathway associated with parental behavior, Using receptor autoradiography, the authors examined whether AVP and OT receptor patterns were associated with facultative paternal behavior in either sexually and parentally inexperienced or experienced meadow voles (Microtus pennsylvanicus). Experienced, in contrast to intexperienced, males had less AVP binding in the lateral septum (LS), more AVP binding in the anterior olfactory nucleus (AON), and more OT binding in the AON, bed nucleus of the stria terminalis, LS, and lateral amygdala. Thus, specific AVP receptor patterns, which co-occur with paternal care in consistently paternal vales also may he associated with paternal care (when present) in typically nonpaternal species. This study also demonstrated a possible relationship between OT receptor patterns and paternal state in male mammals.