Zhang Jian-Xu, Rao Xiao-Ping, Sun Lixing, Wang Da-Wei, Liu Dingzhen, Zhao Chenghua
State Key Laboratory of Integrated Management of Pest Insects and Rodents in Agriculture, Institute of Zoology, Chinese Academy of Sciences, Beijing 100080, China.
Physiol Behav. 2008 Mar 18;93(4-5):1071-7. doi: 10.1016/j.physbeh.2008.01.017. Epub 2008 Jan 31.
This study investigated the impact of long-term paternal presence (cohabitation) on several physiological parameters such as body weight, adrenal weight, cortisol of parents, and the survival of pups compared with brief daily encounters (isolation) of male-female pairs in golden hamsters (Mesocricetus auratus). We showed that females were affected more by cohabitation as evidenced by increased body and adrenal weights, elevated cortisol concentrations, and heavier uteri and spleens as compared with cohabiting male and isolated females. Furthermore, we found that tetradecanoic and hexadecanoic acids of the flank glands were sexually dimorphic, for which they were putative female pheromones. These two compounds were suppressed in females and elevated in males by cohabitation, suggesting that cohabitation impaired sex chemosignals. Overall, we concluded that housing females and males together had deleterious effects on adults and the survival of their pups in the golden hamster.
本研究调查了长期父本存在（同居）对金黄地鼠（Mesocricetus auratus）若干生理参数的影响，如体重、肾上腺重量、亲本的皮质醇水平以及幼崽的存活率，并将其与雌雄配对的每日短暂接触（隔离）进行比较。我们发现，与同居雄性和隔离雌性相比，同居对雌性的影响更大，表现为体重和肾上腺重量增加、皮质醇浓度升高以及子宫和脾脏更重。此外，我们发现胁腺中的十四烷酸和十六烷酸具有性别二态性，它们被认为是雌性信息素。同居会使雌性体内的这两种化合物受到抑制，而雄性体内则会升高，这表明同居会损害性化学信号。总体而言，我们得出结论，将雌性和雄性饲养在一起对金黄地鼠的成年个体及其幼崽的存活具有有害影响。
