The effect of methyltestosterone (MT) on sex differentiation and growth in juvenile yellow perch (Perca flavescens)

Othman R 1 , Ron XJ 1 , Yao H 1 , O'Bryant P 1 , Rapp D 1 , Pei JC 2 Show all authors , Wu HJ 3 , Wang HP 4

Affiliations 

  • 1 Ohio Center for Aquaculture Research and Development, The Ohio State University South Centers, 1864 Shyville Road, OH, 45661, Piketon, USA
  • 2 School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China
  • 3 School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan, 430074, People's Republic of China. hjwu88@163.com
  • 4 Ohio Center for Aquaculture Research and Development, The Ohio State University South Centers, 1864 Shyville Road, OH, 45661, Piketon, USA. wang.900@osu.edu
Fish Physiol Biochem, 2022 Feb;48(1):161-171.
PMID: 35039993 DOI: 10.1007/s10695-021-01038-0

Abstract

A study was conducted to evaluate the gonad differentiation of juvenile yellow perch (YP, Perca flavencens) and determine the latest labile period related to hormone treatment. Juvenile fish were subjected to two dietary concentrations of methyltestosterone (MT; 20 and 50 mg/kg feed) for 60 days in three (3) age groups of 38-, 46-, and 67-days post-hatching (dph), where control group were fed with standard commercial feed. Following a 10-month on-growing period, sex phenotypes were determined by gross and histological gonad morphology. Results showed the juvenile YP responded to the exogenous hormone when it was applied at 38 dph for both 20 and 50 mg/kg feed resulting in 100% males. At 46 dph, only 50 mg/kg feed resulted in 100% males. Both MT-treated at 38 and 46 dph significantly differed (P 

* Title and MeSH Headings from MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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