Role of DHEA in Mediating Seasonal Aggression in male Siberian Hamsters ( Phodopus sungorus )
نویسندگان
چکیده
As we start a new school year I would like to take this opportunity to welcome back the many students, staff, research associates and faculty associated with the Center for the Integrative Study of Animal Behavior (CISAB). To those of you who are new to CISAB and the Indiana University community, I would like to extend a special welcome to you and I would also like to express my excitement about serving as the next director of CISAB. This year, CISAB, the original brainchild of Drs. Ellen Ketterson and Bill Timberlake, whose extraordinary vision and considWHAT’S INSIDE ————————————— REU Abstracts
منابع مشابه
The role of androgens in the mediation of seasonal territorial aggression in male Siberian hamsters (Phodopus sungorus).
Testosterone (T) mediates aggression in a wide range of species. In some species, however, aggressive behavior persists or increases during the non-breeding season when T levels are relatively low. Animals that do not display a positive correlation between aggression and gonadal steroids suggest the need for further investigation of alternative neuroendocrine mechanisms mediating seasonal aggre...
متن کاملAggressive encounters differentially affect serum dehydroepiandrosterone and testosterone concentrations in male Siberian hamsters (Phodopus sungorus).
The gonadal hormone testosterone (T) regulates aggression across a wide range of vertebrate species. Recent evidence suggests that the adrenal prohormone dehydroepiandrosterone (DHEA) may also play an important role in regulating aggression. DHEA can be converted into active sex steroids, such as T and estradiol (E(2)), within the brain. Previous studies show that circulating DHEA levels displa...
متن کاملAdrenal hormones mediate melatonin-induced increases in aggression in male Siberian hamsters (Phodopus sungorus).
Among the suite of seasonal adaptations displayed by nontropical rodents, some species demonstrate increased territorial aggression in short compared with long day lengths despite basal levels of testosterone. The precise physiological mechanisms mediating seasonal changes in aggression, however, remain largely unknown. The goal of the present study was to examine the role of melatonin, as well...
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Aggression is an essential social behavior that promotes survival and reproductive fitness across animal systems. While research on the neuroendocrine mechanisms underlying this complex behavior has traditionally focused on the classic neuroendocrine model, in which circulating gonadal steroids are transported to the brain and directly mediate neural circuits relevant to aggression, recent stud...
متن کاملShort-day increases in aggression are independent of circulating gonadal steroids in female Siberian hamsters (Phodopus sungorus).
Among the suite of adaptations displayed by seasonally-breeding rodents, individuals of most species display reproductive regression and concomitant decreases in gonadal steroids during the winter. In addition, some species display increased aggression in short "winter-like" days compared with long "summer-like" day lengths. For example, male Syrian and Siberian hamsters held in short days expr...
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