Sean A. Taylor

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Male-induced estrus was examined in montane (Microtus montanus), meadow (M. pennsylvanicus), prairie (M. ochrogaster), and pine (M. pinetorum) voles. Duration of male contact needed for receptivity, effects of parity, and vaginal cytology were assessed. Among nulliparous females, montane voles attained receptivity with less male contact than prairie voles.(More)
Koren, Phys. Rev. Lett. 65, 2708 (1990). 11. C. J. Stevens et al., Phys. Rev. Lett. 78, 2212 (1997) and references therein. 12. J. L. W. Siders, R. N. Jacobs, C. W. Siders, S. A. Trugman, S. A. Taylor, in Ultrafast Phenomena XI, T. Elsaesser et al., Eds. (Springer, Berlin, 1998), pp. 365–367. 13. R. A. Kaindl, F. Eickemeyer, M. Woerner, T. Elsaesser, Appl.(More)
This study was designed to determine testes masses, total number of spermatozoa ejaculated per copulatory episode, and the pattern of sperm numbers in successive ejaculates in prairie voles (Microtus ochrogaster), montane voles (M. montanus), pine voles (M. pinetorum), and meadow voles (M. pennsylvanicus). Prairie voles displayed mean totals of 2.7(More)
Male prairie vole preferences for estrous versus diestrous females and associated stimuli were investigated. The role of sexual experience in engendering preferences proved more complex than reported for other species. Naive males did not display preferences. Neither males receiving sexual experience through monogamous cohabitation, nor males housed with(More)
The level of particulate contamination in small volume injections has been examined using the light blockage (HIAC) and electrical sensing zone (Coulter counter) techniques, the HIAC system being found to be the more suitable. Particle counts on the same batch of injection showed a large and variable difference between the HIAC and the Coulter counter(More)
We permitted male prairie and montane voles (Microtus ochrogaster and M. montanus) five thrusts, without ejaculation, with a female at variable times after a 1st male ejaculated. In both prairie and montane voles, there were fewer sperm, in relation to control conditions, in the female's tract 1 hr after ejaculation if the female received thrusts(More)
Commercially available sterile needles and syringes have been examined for particulate contamination using the Hiac light blockage technique. The number of particles delivered was small compared with the total number permitted for large volume parenterals. Where syringes are used in particle counting techniques, the contribution of particles should be taken(More)
This study was designed to delineate the course of sexual satiation in prairie voles (Microtus ochrogaster). Fourteen male-female pairs were allowed to copulate freely for 24 hr under continuous observation. Copulations occurred predominantly during the first few hours and decreased in frequency thereafter. The mean number of ejaculations per pair was 5.6(More)
Low temperatures cause a decrease in the absorption and movement of water in plants (1, 2, 3, 9, 10). This reduction is less in species native to cool environments than in species which normally grow in warm ones (10). This has been attributed to the combined effects of decreased permeability of the root membranes and the increased viscosity of the water.(More)