Abstract
Abstract The immobility reaction in Triturus cristatus carnifex was analyzed in behavioural and endocrine aspects in relation to captivity. The behavioural effect consisted in a decrement of immobility latency in males. In females testosterone (T) and estradiol (E) plasma levels were lowered, while in males the T/E ratio was enhanced and E lowered. Captivity also abolished the correlation between hormonal and behavioural values.
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