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Russian Journal of Developmental Biology

, Volume 49, Issue 2, pp 108–116 | Cite as

Condition of Sex Glands in the Young of the Current Year of Rainbow Trout Subjected to Surfagon Injections

  • E. D. Pavlov
  • E. V. Ganzha
  • Vo Thi Ha
  • Nguyen Anh Tien
  • D. S. Pavlov
Morphogenesis
  • 8 Downloads

Abstract

Condition of sex glands and thyroid and steroid hormone levels in the blood are assessed in the young of the current year of rainbow trout cultivated in the high-mountain area of South Vietnam and subjected to injections of surfagon (synthetic analogue of gonadotropin-releasing hormone). In the conditions of the trout hatchery (Vietnam), gonads of the young of the current year are characterized by substantial anomalies, including an appearance (in addition to females and males) of hermaphrodite and sterile individuals. A single injection of surfagon 1 month after hatching leads to stabilization of the development of sex glands and decrease of the proportion of sterile individuals (from 41 to 22%). This study is the first attempt of the assessment of the effect of the injection of gonadotropin-releasing hormone analogue on the development of sex glands in the early ontogeny of fishes.

Keywords

rainbow trout Parasalmo mykiss Vietnam surfagon sex glands testosterone estradiol triiodthyronin thyroxine 

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Copyright information

© Pleiades Publishing, Inc. 2018

Authors and Affiliations

  • E. D. Pavlov
    • 1
  • E. V. Ganzha
    • 1
  • Vo Thi Ha
    • 2
  • Nguyen Anh Tien
    • 3
  • D. S. Pavlov
    • 1
  1. 1.Severtsov Institute of Ecology and EvolutionRussian Academy of SciencesMoscowRussia
  2. 2.Coastal DepartmentRussian–Vietnamese Tropical Research and Technological CenterNha TrangVietnam
  3. 3.Research Institute of Aquaculture no. 3Nha TrangVietnam

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