Expression of the kisspeptin/gonadotropin-releasing hormone (GnRH) system in the brain of female Chinese sucker (Myxocyprinus asiaticus) at the onset of puberty

Su, Shiping; Li, Qingqing; Li, Xilei; Rong, Chaozhen; Xie, Qiming

doi:10.1007/s10695-019-00717-3

Cited by 2 publications

(1 citation statement)

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“…Changes in external environmental factors act as signals to stimulate the reproductive endocrine system of fish and affect the brain‐pituitary‐gonad axis, which in turn induces the production of kisspeptin and gonadotropin‐releasing hormone in the hypothalamus. Kisspeptin (Kiss), a member of the RF‐amide family, is known to be the main driver of the onset of puberty and reproductive control, when paired with its receptor (G‐protein coupled receptor 54, GPR54) (Beck et al, 2012; Filby et al, 2008; Shahjahan et al, 2010; Su et al, 2020). In addition, kisspeptin occurs in multiple forms (Kiss 1 and Kiss 2) in various fish.…”

Section: Introductionmentioning

confidence: 99%

Annual changes in ovarian development stages of farmed female red‐spotted grouper, Epinephelus akaara, and inducing sexual maturity using photoperiod manipulation

Kim

Choi

Lee

et al. 2022

J World Aquaculture Soc

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This study aimed to investigate the correlation between melatonin and the reproductive mechanism of farmed female red‐spotted groupers, Epinephelus akaara. Through the reproductive cycle experiment, the sexual maturity period was determined to be from June to July, following which the spawning season occurred in August. In addition, kiss1, kiss2, and GPR54 mRNA expression levels peaked in January, whereas that of sbGnRH mRNA remained at high levels from January to May and decreased during the sexual maturity and spawning seasons. During the day–night cycle, a nocturnal rhythm of AANAT2 mRNA expression was observed in the brain, and AANAT2 mRNA expression showed a seasonal pattern with increased expression during summer compared with that in winter. A correlation between melatonin and reproduction‐related genes could not be observed via melatonin administration, and sexual maturity was observed to be more induced under long photoperiod conditions compared with short photoperiod conditions. These results indicate that the reproductive mechanism of the farmed female red‐spotted grouper is related to changes in photoperiod and melatonin, and further research is needed to clarify the reproductive mechanism. Our findings provide basic information for identifying the reproductive mechanisms of farmed E. akaara.

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