Searchable abstracts of presentations at key conferences in endocrinology
Endocrine Abstracts (2010) 22 P46

ECE2010 Poster Presentations Adrenal (66 abstracts)

Profile of cortisol changes during early stages of development in rainbow trout

Gholam Reza Ghaedi 1 , Vahid Yavari 1 , Bahram Falahatkar 2 , Amir Parviz Salati 1 & Reza Sahraeian 1


1Khoramshahr Marine Science and Technology University, Khoramshahr, Islamic Republic of Iran; 2University of Guillan, Rasht, Islamic Republic of Iran.


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 cortisol biosynthesis was occurred. Cortisol level was increased to 3.01±0.14 at 2-week-old fish. Result of this study showed that cortisol biosynthesis could be observed in rainbow trout during the late stages of embryo development, before hatching will be started.

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