Endocrine Abstracts

Whole-body cortisol content was measured in oocyte, embryo and larvae of rainbow trout by extraction and RIA. The cortisol content of oocyte was 2.55±0.06 ng/ml that probably has a mathernal origin. After fertilization cortisol level decreased to 1.84±0.07 ng/ml, then reached to the lowest level (0.30±0.06 ng/ml) by day 10 where it remained unchanged until eyed stage on day 18. After that cortisol increased at hatching to 0.60±0.06 ng/ml, suggested that cor...