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  • 1
    Electronic Resource
    Electronic Resource
    Springer
    Behavior genetics 14 (1984), S. 1-19 
    ISSN: 1573-3297
    Keywords: Mice ; alcohol ; selective breeding ; pharmacogenetics ; biometrical genetics
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract A classical Mendelian cross was derived from Long-Sleep (LS) and Short-Sleep (SS) mice, lines selectively bred for differences in response to hypnotic doses of ethanol (ETOH). Biometrical genetic procedures applied to the selection phenotype, namely, duration of the ETOH-induced loss of the righting reflex, suggest that a simple additive genetic system controls this depressant response. Sex differences were present in the Mendelian cross generations that had the longest duration responses. An estimate of the number of loci differentiated by the selection was nine. Blood ethanol levels at the time of regaining the righting reflex in the seven genotypes of the Mendelian cross showed that the selection operated solely by changing tissue sensitivity to ethanol.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    Behavior genetics 24 (1994), S. 493-496 
    ISSN: 1573-3297
    Keywords: Mice ; cross-transferring ; sibling reunion ; analgesia ; kin recognition mechanisms
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract The kin selection theory predicts that individuals would behave differently toward one another, depending on their genetic relatedness. Kin discrimination has been demonstrated in mice from social behavior, and previous familiarity, as well as familiarity with the partner's phenotype, has been postulated to represent proximate mechanisms. It has already been demonstrated that siblings' reunion resulted in a decrease in pain sensitivity that is mediated by endogenous opioids. In this study, using a cross-transferring design, it is shown that genetic relatedness with the male partner, independently of postnatal association, is responsible for changes in nociceptive threshold. Conversely, previous association till weaning has no effect on pain sensitivity. These data suggest that endogenous opioids activity and social behavior represent indices of different processes: the recognition of related animals and the discrimination of familiar (and also usually related) subjects, respectively.
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Behavior genetics 26 (1996), S. 463-470 
    ISSN: 1573-3297
    Keywords: Mice ; agonistic behavior ; aggression ; homogeneous set ; standard tester ; social behavior
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract Though social behavior has not been overlooked by behavior geneticists, the number of studies is small when compared to those on individual traits. One reason for the neglect may be the difficulty of making connections between genes and social behaviors, which by definition involve the interaction of two or more organisms. Fuller and Hahn (1976) addressed this issue and described three means of establishing social groups that would facilitate genetic analysis. We survey the literature on agonistic behavior in mice from 1976 through 1994 and describe interesting uses of those three methods. One of those methods (the standard tester design) often employs a “noninteractive” social partner. We present data showing that the standard tester design may be more valuable when using an evocative and interactive standard tester.
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Behavior genetics 25 (1995), S. 361-366 
    ISSN: 1573-3297
    Keywords: Mice ; aggression ; isolation-induced aggression ; predatory aggression ; selected lines ; genetic variation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract Male mice differing in their genetically determined disposition for isolation-induced intermale aggression were compared on behaviors related to predatory aggression. An ongoing sequence of selective breeding established high-aggressive (Turku Aggressive: TA) and low-aggressive (Turku Non-Aggressive: TNA) lines from an outbred Swiss albino foundation stock. The parental strain, designated the Normal (N) strain, has been kept as a control line and is bred without regard to aggressiveness. Testing consisted of dropping a live cricket into the home cage of the individually housed experimental mice. Results showed that the TA males displayed shorter latencies to attack and spent more time in chasing, attacking, and consuming crickets than did TNA and N males. The TNA males displayed significantly less predatory aggression than both the TA and N males. When brothers of the males tested for predatory aggression were tested for intermale aggression, a similarly significant effect of breeding line was obtained for the latency to attack. Testing consisted of placing an intact male mouse into the cage of the male to be tested. The results suggest that there may be parallels in genetic variation between intermale and predatory attacking.
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  • 5
    ISSN: 1573-3297
    Keywords: Mice ; ultrasonic calls ; infants ; individual differences ; signatures
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract Infant house mice, Mus musculus, produce ultrasonic calls that reliably lead to retrieval by adult mice. While individual differences in calls have been demonstrated both among and within species, the influences of age and sex on call characteristics have not been systematically investigated in mice. This study examined the influences of age, sex, and genotype (inbred versus hybrid) on the rate, length, and frequency characteristics of the calls of 486 male and female mice from 2 to 12 days of age. Rate of calling followed a shallow inverted U-shaped function across days. Call lengths decreased and call frequency characteristics increased, in a linear manner, with age. Females emitted fewer calls, with a smaller bandwidth, at some ages than males. Hybrid pups produced more calls of greater length and a lower frequency than inbred pups. These results indicate the presence of cues that could allow adult mice to behave differentially toward pups as a function of their age and sex.
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  • 6
    ISSN: 1573-3297
    Keywords: Mice ; ultrasounds ; ultrasonic calls ; infants ; diallel cross ; individual differences
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Psychology
    Notes: Abstract Ultrasonic calls produced by young mice reliably elicit investigation and retrieval by adults. While there are large individual differences in the characteristics of these calls, little work has been done to partition that variation. We completed a 4 × 4 diallel cross and Hayman analyses on several characteristics of these cries. The major result was the detection of directional dominance toward a higher rate of calling, longer calls, and calls of lower overall frequency with a greater bandwidth. Within the context of biometrical genetic theory, we conclude that calls with such characteristics may have important fitness value. Extending this idea, we propose that within the population sampled for this study (the animals of the four inbred strains and 12 F1 hybrid groups), the calls most effectively eliciting investigation and retrieval would be calls with the average hybrid values of the diallel cross.
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