摘要:

AbstractThe short‐term effects on testosterone (T) levels of (a) taking blood samples, (h) fighting in one's own home cage, and (c) fighting in another male's home cage were examined in eight alpha male guinea pigs, each living together with two females and two subordinate males in their home cages for 4 months. Every male was given two 5‐minute agonistic encounters, one in his home cage and one in another male's home cage. After the encounter, intruder males were returned to their home cages. Three blood samples were taken 10 minutes before and 5 and 45 minutes after the agonistic encounters (sampling times were designated as 0, 20, and 60 minutes, respectively). One week before the agonistic encounters were conducted, blood samples were taken from each male on the same time schedule (0, 20, and 60 minutes). The main findings were as follows: (1) the animals showed an increase in T‐levels after an agonistic encounter in their home cages and a decline in T‐levels after an agonistic encounter in the home cages of other alpha males' irrespective of being the winner or the loser and the degree of escalation during the encounter; (2) the smaller the differences in T‐titers between both opponents 10 minutes before the encounter, the more escalated the agonistic

ISSN:0096-140X    

DOI:10.1002/1098-2337(1984)10:4<285::AID-AB2480100402>3.0.CO;2-8

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1984

数据来源: WILEY

摘要:

AbstractMale Mongolian gerbils show an increase in infanticide and pup‐cannibalism after 24‐hr food deprivation, suggesting that food acquisition is a function of this activity. Dominant animals show high levels of infanticide, but subordinate animals are inhibited from this activity. An increase in infanticide is seen when males from a single sex group are isolated; this increase resembles that observed when a male is separated from his pregnant mate [Elwood, 1980]. These results suggest a mechanism whereby males are normally brought into a noninfanticidal state during cohabitation with their pregnant mates owing to subordination by the latter. In this manner males are able to utilize strange pups as food but avoid harming their own offspr

ISSN:0096-140X    

DOI:10.1002/1098-2337(1984)10:4<293::AID-AB2480100403>3.0.CO;2-A

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1984

数据来源: WILEY

摘要:

AbstractFemale hamsters were allowed to attack a series of target hamsters until they reached a criterion of attack satiation. Following delays of 0, 24, or 48 hr they were then presented with a novel “probe” target. Attacks on the probe target were reduced to 26% of baseline at 0 delay and had returned to 71% of baseline by 48 hr. The number of attacks necessary to achieve satiation criterion increased then decreased over the three test occasions, suggesting that habituationlike processes may contribute to, but cannot wholly account for, the satiation eff

ISSN:0096-140X    

DOI:10.1002/1098-2337(1984)10:4<303::AID-AB2480100404>3.0.CO;2-D

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1984

数据来源: WILEY

摘要:

AbstractThe effect of fear on two types of aggression in rats was investigated by adding a cat stimulus to a colony in which the dominant male was attacking an intruder (offensive aggression), or, to a tube test situation in which defensive biting was measured before and during tail shock. The cat completely abolished offense in the colony; when the cat was presented and removed before a strange rat was placed in the colony, attack on the intruder was also reduced. In contrast, defensive biting was unchanged or even slightly potentiated by the presence of the cat, demonstrating a separation of the effects of fear on offensive and defensive aggression.

ISSN:0096-140X    

DOI:10.1002/1098-2337(1984)10:4<309::AID-AB2480100405>3.0.CO;2-T

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1984

数据来源: WILEY

摘要:

AbstractSignificantly more male mice having cohabited and mated with intact females subsequently displayed intraspecific fighting behavior after castration than males having cohabited with noncycling (ovariectomized) females. Also, intact males that failed to achieve a criterion for aggression during three screening tests subsequently showed a marked increase in fighting after having had copulatory experience relative to males that lived with ovariectomized females. Lastly, spontaneously aggressive males copulated more frequently than nonfighters.

ISSN:0096-140X    

DOI:10.1002/1098-2337(1984)10:4<317::AID-AB2480100406>3.0.CO;2-V

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1984

数据来源: WILEY

ISSN:0096-140X    

DOI:10.1002/1098-2337(1984)10:4<325::AID-AB2480100408>3.0.CO;2-U

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1984

数据来源: WILEY

ISSN:0096-140X    

DOI:10.1002/1098-2337(1984)10:4<327::AID-AB2480100409>3.0.CO;2-L

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1984

数据来源: WILEY

ISSN:0096-140X    

DOI:10.1002/1098-2337(1984)10:4<333::AID-AB2480100410>3.0.CO;2-L

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1984

数据来源: WILEY

ISSN:0096-140X    

DOI:10.1002/1098-2337(1984)10:4<::AID-AB2480100401>3.0.CO;2-H

出版商:Wiley Subscription Services, Inc., A Wiley Company    

年代:1984

数据来源: WILEY