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Ferkin, M.; Combs, A.; delBarco-Trillo, J.; Pierce, A.; Franklin, S. |
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Meadow voles, Microtus pennsylvanicus , have the capacity to recall the “what”, “where”, and “when” of a single past event |
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2008 |
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Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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11 |
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1 |
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147-159 |
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Recollection for what, when, and where – Voles – Reproductive state – Postpartum estrus |
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Abstract Some non-human animals may possess the ability to recall the “what”, “where”, and “when” of a single past event. We tested the hypothesis that male meadow voles posses the capacity to recall the “what”, “where”, and “when” of a single past event associated with mate selection in two experiments. Briefly, male voles were allowed to explore an apparatus that contained two chambers. One chamber contained a day-20 pregnant female (24 h prepartum). The other chamber contained a sexually mature female that was neither pregnant nor lactating (REF female). Twenty-four hour after the exposure, the males were placed in the same apparatus, which was empty and clean. At this time, the pregnant female would have entered postpartum estrus (PPE), a period of heightened sexual receptivity. Males initially chose and spent significantly more time investigating the chamber that originally housed the pregnant female (now a PPE female) than the chamber that originally housed the REF female. Male voles also explored an apparatus containing a chamber with a PPE female and one chamber containing a REF female. Twenty-four hour later, males were placed into an empty and clean apparatus. The males did not display an initial choice and they spent similar amounts of time investigating the chamber that originally housed the PPE female (now a lactating female) and the chamber that originally housed the REF female. The results of these and additional experiments suggest that male voles may have the capacity to recall the “what”, “where”, and “when” of a single past event, which may allow males to remember the location of females who would currently be in heightened states of sexual receptivity. |
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Admin @ knut @ |
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4215 |
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Author |
Ferkin, M.H.; Pierce, A.A.; Sealand, R.O.; Delbarco-Trillo, J. |
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Title |
Meadow voles, Microtus pennsylvanicus, can distinguish more over-marks from fewer over-marks |
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Journal Article |
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2005 |
Publication |
Animal Cognition |
Abbreviated Journal |
Anim. Cogn. |
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8 |
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3 |
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182-189 |
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Animals; Arvicolinae/*psychology; *Discrimination Learning; Female; Intermediate Filament Proteins; Male; Mathematics; Sex Factors; *Smell |
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Is it possible that voles have a sense of number? To address this question, we determined whether voles discriminate between two different scent-marking individuals and identify the individual whose scent marks was on top more often than the other individual. We tested whether voles show a preference for the individual whose scent marks was on top most often. If so, the simplest explanation was that voles can make a relative size judgement-such as distinguishing an area containing more of one individual's over-marks as compared to less of another individual's over-marks. We found that voles respond preferentially to the donor that provided a greater number of over-marks as compared to the donor that provided a lesser number of over-marks. Thus, we concluded that voles might display the capacity for relative numerousness. Interestingly, female voles were better able than male voles to distinguish between small differences in the relative number of over-marks by the two scent donors. |
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Department of Biology, The University of Memphis, Ellington Hall, Memphis, TN 38152, USA. mhferkin@memphis.edu |
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1435-9448 |
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PMID:15580367 |
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Equine Behaviour @ team @ |
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2501 |
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