Puberty is an important reproductive event that has not been studied in brook trout in the Southern Hemisphere. The present study describes the histological development of gonads and variations in the levels of oestradiol-17β (E₂), testosterone (T) and 11-ketotestosterone (11-KT) during the first year of male and female brook trout. The study started when the trout were at an age of 8 months (n = 10) and continued until they were 15 months. Of the males, 60% attained puberty at an age of 14 months. The peak of the gonadosomatic index in males was observed at 15 months of age (3.0 ± 0.9%). Female fish did not achieve maturation during their first year and ovarian development did not progress beyond the vesicular oocyte stage within the study period.

Item Type:	Refereed Article
Keywords:	maturation
Research Division:	Biological Sciences
Research Group:	Zoology
Research Field:	Animal developmental and reproductive biology
Objective Division:	Expanding Knowledge
Objective Group:	Expanding knowledge
Objective Field:	Expanding knowledge in the biological sciences
UTAS Author:	Fatima, S (Miss Shafaq Fatima)
UTAS Author:	Adams, M (Dr Mark Adams)
UTAS Author:	Wilkinson, R (Dr Ryan Wilkinson)
ID Code:	98884
Year Published:	2014
Web of Science® Times Cited:	2
Deposited By:	Sustainable Marine Research Collaboration
Deposited On:	2015-03-05
Last Modified:	2018-03-18
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