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Brain Control Reproduction by the Endocrine System of Female Blue Gourami (Trichogaster trichopterus)

by 1,2
1
MIGAL–Galilee Research Institute, POB 831, Kiryat Shmona 1101602, Israel
2
Faculty of Sciences, Tel-Hai Academic College, Upper Galilee 1220800, Israel
Biology 2020, 9(5), 109; https://doi.org/10.3390/biology9050109
Received: 17 April 2020 / Revised: 19 May 2020 / Accepted: 19 May 2020 / Published: 21 May 2020
Blue gourami belongs to the Labyrinithici fish and the Anabantiform order. It is characterized by a specific organ located above its gills for the respiration of atmospheric oxygen. This specific adaptation to low oxygen levels affects reproduction that is controlled by the brain, which integrates different effects on reproduction mainly through two axes—the gonadotropic brain pituitary gonad axis (BPG) and the hypothalamic-pituitary-somatotropic axis (HPS axis), including the interactions between them. This brain control reproduction of the Anabantoidei suborder summarizes information that has been published on the hormones involved in controlling the reproduction system of a model female blue gourami fish (Trichogaster trichopterus), including unpublished data. In the whole-brain transcriptome of blue gourami, 17 transcription genes change during vitellogenesis in the brain. The hormones involved in reproduction in blue gourami described in the present paper include: Kisspeptin 2 (Kiss 2) and its receptors 1 and 2 (KissR 1 and 2); gonadotropin-releasing hormone 1, 2 and 3 (GnRH1, 2 and 3); GnRH receptor; pituitary adenylate cyclase-activating polypeptide (PACAP) and its related peptide (PRP); somatolactin (SL); follicle-stimulating hormone (FSH); luteinizing hormone (LH); growth hormone (GH); prolactin (PRL), 17β-estradiol (E2); testosterone (T); vitellogenesis (VTL); and 17α,20β- dihydroxy-4-pregnen-3-one (17,20P). A proposed quality model is presented regarding the brain control oogenesis in blue gourami that has a Labyrinth organ about which relatively little information has been published. This paper summarizes the complex various factors involved in the interactions between external and internal elements affecting the brain of fish reproduction in the Anabantiform order. It is suggested to study in the future the involvement of receptors of hormones, pheromones, and genome changes in various organs belonging to the reproduction system during the reproduction cycles about which little is known. View Full-Text
Keywords: Anabantidae; hormone receptors; Trichogaster; vitellogenesis; yolk accumulation; gonadotropic brain pituitary gonad axis Anabantidae; hormone receptors; Trichogaster; vitellogenesis; yolk accumulation; gonadotropic brain pituitary gonad axis
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MDPI and ACS Style

Degani, G. Brain Control Reproduction by the Endocrine System of Female Blue Gourami (Trichogaster trichopterus). Biology 2020, 9, 109. https://doi.org/10.3390/biology9050109

AMA Style

Degani G. Brain Control Reproduction by the Endocrine System of Female Blue Gourami (Trichogaster trichopterus). Biology. 2020; 9(5):109. https://doi.org/10.3390/biology9050109

Chicago/Turabian Style

Degani, Gad. 2020. "Brain Control Reproduction by the Endocrine System of Female Blue Gourami (Trichogaster trichopterus)" Biology 9, no. 5: 109. https://doi.org/10.3390/biology9050109

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