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 @entity19694 . Known-age males (N=19) were studied during the breeding seasons of 2004 and 2005 at @entity7543 Island, Canada. The stressor was a capture and restraint period of 35 min and serial samples of @entity701 and @entity251 were taken as measures of stress. The mean baseline concentrations of @entity701 and @entity251 were 9.7+/-0.5 ug/dl and 6.2+/-0.6 ng/mL, respectively. The baseline @entity701 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 @entity701 during the restraint period (79.1+/-8.4%; CV=46.1%). The percentage rise in @entity701 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 @entity251 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 @entity19694 . More successful males might exhibit an adaptive response to stress by maintaining low concentrations of @entity701 during breeding.

The implications of stress on male mating behavior and success in a sexually dimorphic polygynous mammal, the XXXX .

@entity19694 :: ('9711', 'Species') :: ['grey seals', 'grey seal'] @entity251 :: ('MESH:D013739', 'Chemical') :: ['testosterone'] @entity7543 :: ('36722', 'Species') :: ['Sable'] @entity701 :: ('MESH:D006854', 'Chemical') :: ['cortisol']
@entity19694 :: (9711,Species) :: ['grey seal']
