Allopregnanolone Promotes Success in Food Competition in Subordinate Male Rats

2013 ◽  
Vol 68 (1) ◽  
pp. 15-23 ◽  
Author(s):  
Magnus Löfgren ◽  
Sara K. Bengtsson ◽  
Maja Johansson ◽  
Torbjörn Bäckström
Keyword(s):  
Food Competition ◽  
Male Rats ◽  
Subordinate Male

Juvenilized play fighting in subordinate male rats

1992 ◽  
Vol 18 (6) ◽  
pp. 449-457 ◽  
Author(s):  
Sergio M. Pellis ◽  
Vivien C. Pellis
Keyword(s):  
Male Rats ◽  
Subordinate Male ◽  
Play Fighting

Serotonin, but not dopamine, metabolites are increased in selected brain regions of subordinate male rats in a colony environment

1991 ◽  
Vol 568 (1-2) ◽  
pp. 61-66 ◽  
Author(s):  
D. Caroline Blanchard ◽  
Panrapee Cholvanich ◽  
Robert J. Blanchard ◽  
Daniel W. Clow ◽  
Ronald P. Hammer ◽  
...  
Keyword(s):  
Brain Regions ◽  
Male Rats ◽  
Subordinate Male ◽  
Dopamine Metabolites

REM sleep deprivation and food competition in male rats

1981 ◽  
Vol 26 (2) ◽  
pp. 245-247 ◽  
Author(s):  
Robert A. Hicks ◽  
Claire Hirshfield ◽  
Virginia Humphrey ◽  
Andrea Lauber ◽  
Janice Giampaoli ◽  
...  
Keyword(s):  
Sleep Deprivation ◽  
Rem Sleep ◽  
Food Competition ◽  
Male Rats ◽  
Rem Sleep Deprivation

The effects of d-amphetamine on food competition in male rats

1987 ◽  
Vol 27 (4) ◽  
pp. 707-714 ◽  
Author(s):  
Johnny A. Mitchell ◽  
Ronald M. Lewis ◽  
Marvin C. Wilson
Keyword(s):  
Food Competition ◽  
Male Rats

scholarly journals Novel Competition test for food rewards reveals stable dominance status in rats

2020 ◽  
Author(s):  
Diana F Costa ◽  
Marta A Moita ◽  
Cristina Márquez
Keyword(s):  
Home Cage ◽  
Social Rank ◽  
Food Competition ◽  
Social Hierarchy ◽  
Male Rats ◽  
Agonistic Interactions ◽  
Dominance Status ◽  
Social Hierarchies ◽  
Social Tasks ◽  
Stable Pairs

ABSTRACTSocial hierarchy is a potent modulator of behavior in many species, including humans, that is typically established through overt agonistic interactions between individuals in the group. Once established, social ranks are maintained through subtler interactions allowing the redirection of energy away from agonistic interactions towards other needs. Most of the available tasks for assessing social rank in rodents allow the study of the mechanisms by which social hierarches are formed but fail to assess the maintenance of established hierarchies between stable pairs of animals, which might rely on distinct neurobiological mechanisms. Here we present and validate a novel trial-based dominancy assay, the modified Food Competition test, where established social hierarchies can be identified in the home cage of non-food deprived pairs of male rats. In this task, we introduce a small conflict in the home cage, where access to a new feeder containing palatable pellets can only be gained by one animal at a time. We found that this subtle conflict triggered asymmetric social interactions and resulted in higher consumption of food by one of the animals in the pair. To assess the reliability of the observed asymmetries as reflecting dominance relationships we investigated the behavior of same rat dyads in multiple social tasks adapted from social hierarchy studies. We found a positive correlation in dominance indices across most tests used. Our findings reveal stable dominance status in pair housed rats and provide a novel tool for the evaluation of established social hierarchies, the modified Food Competition test, that is robust and easy to implement, thus expanding the set of tasks available to study dominance in the lab.

Some subordinates are more equal than others: Play fihgting amongst adult subordinate male rats

1993 ◽  
Vol 19 (5) ◽  
pp. 385-393
Author(s):  
Serlio M. Pells ◽  
Vivien C. Pells ◽  
Mario M. McKenna
Keyword(s):  
Male Rats ◽  
Subordinate Male

scholarly journals Novel competition test for food rewards reveals stable dominance status in adult male rats

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Diana F. Costa ◽  
Marta A. Moita ◽  
Cristina Márquez
Keyword(s):  
Social Interactions ◽  
Home Cage ◽  
Social Rank ◽  
Food Competition ◽  
Male Rats ◽  
Agonistic Interactions ◽  
Dominance Status ◽  
Social Hierarchies ◽  
Stable Pairs ◽  
Early Phases

AbstractSocial hierarchy is a potent modulator of behavior, that is typically established through overt agonistic interactions between individuals in the group. Once established, social ranks are maintained through subtler interactions allowing the redirection of energy away from agonistic interactions towards other needs. The available tasks for assessing social rank in rats allow the study of the mechanisms by which social hierarches are formed in early phases but fail to assess the maintenance of established hierarchies between stable pairs of animals, which might rely on distinct neurobiological mechanisms. Here we present and validate a novel trial-based dominancy assay, the modified Food Competition test, where established social hierarchies can be identified in the home cage of non-food deprived pairs of male rats. In this task, we introduce a small conflict in the home cage, where access to a new feeder containing palatable pellets can only be gained by one animal at a time. We found that this subtle conflict triggered asymmetric social interactions and resulted in higher consumption of food by one of the animals in the pair, which reliably predicted hierarchy in other tests. Our findings reveal stable dominance status in pair-housed rats and provide a novel tool for the evaluation of established social hierarchies, the modified Food Competition test, that is robust and easy to implement.

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