Journal ArticleDOI
Stimulation of gonadotropin release and of ovarian development, by the administration of a gonadoliberin agonist and of dopamine antagonists, in female silver eel pretreated with estradiol.
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TLDR
The results suggest that a double neuroendocrine mechanism (a lack of GnRH production and a dopaminergic inhibition of Gn RH action) is involved in the prepubertal blockage of eel gonadotropic function before the reproductive migration.About:
This article is published in General and Comparative Endocrinology.The article was published on 1988-04-01. It has received 115 citations till now. The article focuses on the topics: Gonadotropin & Agonist.read more
Citations
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Journal ArticleDOI
Neuroendocrinology of reproduction in teleost fish.
TL;DR: Although precise information as to the physiological effects of KiSS1 in fish, notably on GnRH neurons and gonadotropin release, is still limited, KiSS neurons may emerge as the "gatekeeper" of puberty and reproduction in fish as in mammals.
Journal ArticleDOI
Control of puberty in farmed fish
Geir Lasse Taranger,Manuel Carrillo,Rüdiger W. Schulz,Pascal Fontaine,Silvia Zanuy,Alicia Felip,Finn-Arne Weltzien,Sylvie Dufour,Ørjan Karlsen,Birgitta Norberg,Eva Andersson,Tom Hansen +11 more
TL;DR: Puberty comprises the transition from an immature juvenile to a mature adult state of the reproductive system, i.e. the individual becomes capable of reproducing sexually for the first time, which implies functional competence of the brain-pituitary-gonad (BPG) axis.
Journal ArticleDOI
Perspectives on fish gonadotropins and their receptors.
TL;DR: Recombinant fish GtHs were produced for carp, seabream, channel and African catfish, goldfish, eel, tilapia, zebrafish, Manchurian trout and Orange-spotted grouper, where FSHR expression in Leydig cells explains the strong steroidogenic activity of FSH in certain fish species.
Journal ArticleDOI
Techniques in finfish larviculture in Taiwan
TL;DR: Developments and advanced techniques of finfish larviculture in Taiwan are discussed, including utilization of the green water technique in rearing larvae and of ozone-disinfected recirculating water in weaning larvae.
Journal ArticleDOI
Neuroendocrine control by dopamine of teleost reproduction
Sylvie Dufour,Marie-Emilie Sébert,Marie-Emilie Sébert,Finn-Arne Weltzien,Finn-Arne Weltzien,Karine Rousseau,Catherine Pasqualini +6 more
TL;DR: This work has shown that sex steroid feedbacks target DA hypophysiotropic system, as well as the other components of the brain-pituitary gonadotrophic axis, GnRH and gonADotrophins, which may have contributed to their large diversity of reproductive cycles.
References
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Journal ArticleDOI
Cellular and dynamic aspects of oocyte growth in teleosts
Robin A. Wallace,Kelly Selman +1 more
TL;DR: Teleosts offer examples of virtually every conceivable type of ovarian physiology and provide a wealth of experimental material for exploring the cellular and hormonal mechanisms which regulate oocyte recruitment and growth throughout ovarian recrudescence.
Journal ArticleDOI
Receptor activity and turnover of dopamine and noradrenaline after neuroleptics.
TL;DR: The most potent and specific neuroleptics seemed to influence mainly the brain DA mechanisms, both functionally and chemically.
Book ChapterDOI
6 The Functional Morphology of Teleost Gonads
TL;DR: This chapter discusses the functional morphology of teleost gonads and a two cell-type model involving thecal and granulosa cell layers has been proposed for the production of these two steroids for the first time in lower vertebrates.
Journal ArticleDOI
Effects of pimozide and des Gly10,[D-Ala6]luteinizing hormone-releasing hormone ethylamide on serum gonadotropin concentrations, germinal vesicle migration, and ovulation in female goldfish, Carassius auratus.
John P. Chang,R.E. Peter +1 more
TL;DR: In gravid female goldfish held at 10-12 degrees, a single injection of des Gly10,[D-Ala6]luteinizing hormone-releasing hormone ethylamide (LHRH-A) increased serum gonadotropin (GtH) concentrations, but did not stimulate germinal vesicle migration or ovulation, while injection of a dopamine antagonist, pimozide (PIM), increased serum GtH levels.
Book ChapterDOI
3 The Brain and Neurohormones in Teleost Reproduction
TL;DR: This chapter discusses the input of information to the neurohormonal system, and describes how the brain might integrate neurohormone output to regulate reproductive activity, and suggests the pineal and/or eyes are the presumed route of input of photoperiod information.