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Arakawa, H.; Arakawa, K.; Blanchard, D.C.; Blanchard, R.J. |
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A new test paradigm for social recognition evidenced by urinary scent marking behavior in C57BL/6J mice |
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2008 |
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Behavioural Brain Research |
Abbreviated Journal |
Behav. Brain. Res. |
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190 |
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1 |
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97-104 |
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Social recognition; Urine marking; Familiarity; Context recognition; C57BL/6J mice |
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Abstract |
Olfaction is a major sensory element in intraspecies recognition and communication in mice. The present study investigated scent marking behaviors of males of the highly inbred C57BL/6J (C57) strain in order to evaluate the ability of these behaviors to provide clear and consistent measures of social familiarity and response to social signals. C57 males engage in scent marking when placed in a chamber with a wire mesh partition separating them from a conspecific. Male mice (C57 or outbred CD-1 mice) showed rapid habituation of scent marking (decreased marking over trials) with repeated exposure at 24-h intervals, to a stimulus animal of the C57 or CD-1 strains, or to an empty chamber. Subsequent exposure to a genetically different novel mouse (CD-1 after CD-1 exposure, or CD-1 after C57 exposure) or to a novel context (different shaped chamber) produced recovery of marking, while responses to a novel but genetically identical mouse (C57 after C57 exposure) or to the empty chamber did not. This finding demonstrated that male mice differentiate familiar and novel conspecifics as expressed by habituation and recovery of scent marking, but neither C57 or CD-1 mice can differentiate new vs. familiar C57 males; likely due to similarities in their odor patterns. The data also indicate that scent marking can differentiate novel from familiar contexts. |
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Equine Behaviour @ team @ |
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4639 |
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Anderson, J.R.; Kuroshima, H.; Kuwahata, H.; Fujita, K. |
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Do squirrel monkeys (Saimiri sciureus) and capuchin monkeys (Cebus apella) predict that looking leads to touching? |
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2004 |
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Animal Cognition |
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Anim. Cogn. |
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7 |
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3 |
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185-192 |
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Animals; Association Learning; *Attention; Cebus/*psychology; Cognition; *Concept Formation; Cues; Fixation, Ocular; Humans; *Nonverbal Communication; Recognition (Psychology); Saimiri/*psychology; Social Behavior; Species Specificity |
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Squirrel monkeys (Saimiri sciureus) and capuchin monkeys (Cebus apella) were tested using an expectancy violation procedure to assess whether they use an actor's gaze direction, signaled by congruent head and eye orientation, to predict subsequent behavior. The monkeys visually habituated to a repeated sequence in which the actor (a familiar human or a puppet) looked at an object and then picked it up, but they did not react strongly when the actor looked at an object but then picked up another object. Capuchin monkeys' responses in the puppet condition were slightly more suggestive of expectancy. There was no differential responding to congruent versus incongruent look-touch sequences when familiarization trials were omitted. The weak findings contrast with a strongly positive result previously reported for tamarin monkeys. Additional evidence is required before concluding that behavior prediction based on gaze cues typifies primates; other approaches for studying how they process attention cues are indicated. |
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Department of Psychology, University of Stirling, FK9 4LA, Stirling, Scotland. jra1@stir.ac.uk |
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1435-9448 |
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PMID:15022054 |
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Equine Behaviour @ team @ |
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2540 |
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Agrillo, C.; Dadda, M.; Bisazza, A. |
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Quantity discrimination in female mosquitofish |
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2007 |
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Animal cognition |
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Anim. Cogn. |
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10 |
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1 |
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63-70 |
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Animals; Cognition; *Cyprinodontiformes; *Discrimination Learning; Female; Male; Mathematics; *Pattern Recognition, Visual |
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The ability in animals to count and represent different numbers of objects has received a great deal of attention in the past few decades. Cumulative evidence from comparative studies on number discriminations report obvious analogies among human babies, non-human primates and birds and are consistent with the hypothesis of two distinct and widespread mechanisms, one for counting small numbers (<4) precisely, and one for quantifying large numbers approximately. We investigated the ability to discriminate among different numerosities, in a distantly related species, the mosquitofish, by using the spontaneous choice of a gravid female to join large groups of females as protection from a sexually harassing male. In one experiment, we found that females were able to discriminate between two shoals with a 1:2 numerosity ratio (2 vs. 4, 4 vs. 8 and 8 vs. 16 fish) but failed to discriminate a 2:3 ratio (8 vs. 12 fish). In the second experiment, we studied the ability to discriminate between shoals that differed by one element; females were able to select the larger shoal when the paired numbers were 2 vs. 3 or 3 vs. 4 but not 4 vs. 5 or 5 vs. 6. Our study indicates that numerical abilities in fish are comparable with those of other non-verbal creatures studied; results are in agreement with the hypothesis of the existence of two distinct systems for quantity discrimination in vertebrates. |
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Department of General Psychology, University of Padova, via Venezia 8, 35131, Padova, Italy. christian.agrillo@unipd.it |
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1435-9448 |
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PMID:16868736 |
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refbase @ user @ |
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339 |
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