کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10301390 540791 2008 8 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The implications of stress on male mating behavior and success in a sexually dimorphic polygynous mammal, the grey seal
موضوعات مرتبط
علوم زیستی و بیوفناوری بیوشیمی، ژنتیک و زیست شناسی مولکولی علوم غدد
پیش نمایش صفحه اول مقاله
The implications of stress on male mating behavior and success in a sexually dimorphic polygynous mammal, the grey seal
چکیده انگلیسی
Studies on primates and other taxa have shown that the physiological response of an individual to stress reflects their social status. We combined behavioral observations with measures of stress to test the hypothesis that stress is an important physiological determinant of mating behavior and success in the male grey seal. Known-age males (N = 19) were studied during the breeding seasons of 2004 and 2005 at Sable Island, Canada. The stressor was a capture and restraint period of 35 min and serial samples of cortisol and testosterone were taken as measures of stress. The mean baseline concentrations of cortisol and testosterone were 9.7 ± 0.5 ug/dl and 6.2 ± 0.6 ng/mL, respectively. The baseline cortisol concentration was negatively correlated with the duration of time a male spent at a site (r = − 0.507, P = 0.027), which was a strong correlate of mating success (r = 0.659, P = 0.002). All males experienced an increase in the concentration of cortisol during the restraint period (79.1 ± 8.4%; CV = 46.1%). The percentage rise in cortisol during restraint was correlated with the mean duration of time spent at a site (r = 0.544, P = 0.016) and thus success. The concentration of testosterone also increased during the restraint period (32.8 ± 9.7%). This might be an adaptive response to maintaining the ability to reproduce while under stress. Our study indicates that stress is an important determinant of success in male grey seals. More successful males might exhibit an adaptive response to stress by maintaining low concentrations of cortisol during breeding.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Hormones and Behavior - Volume 53, Issue 1, January 2008, Pages 241-248
نویسندگان
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