Stress-induced facilitation of the cortisol response in 17α-hydroxylase deficient XX mas−1/mas−1 carp (Cyprinus carpio)

摘要: Abstract Facilitation of the stress response results from a reduction inhibitory effects circulating corticosteroids, allowing an animal to respond novel stressor. In this study, existence facilitated cortisol in normal (STD) and 17α-hydroxylase deficient XX mas −1 / (E5) carp was investigated. E5 had previously been characterized as having low stress. Fish were subjected either feeding or daily-acute stress, 45 until 140 days post-hatch (dph) then net-confinement stressor at 141 dph. Growth fish reduced both cortisol-fed groups, but STD only affected by Cortisol no effect on significantly inhibited subsequent contrast, stressor, while response. accompanied significant enlargement head-kidney tissue (which contains steroidogenic interrenal tissue) fish. To our knowledge is first report stress-induced facilitation lower vertebrate.