EXPRESSION AND HORMONAL DYNAMICS DURING SEXUAL MATURATION IN PIKEPERCH (SANDER LUCIOPERCA)
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Abstract
This study examines the hormonal regulation and gene expression dynamics involved in the sexual maturation of pikeperch (Sander lucioperca). Sexual development in this species is governed by the hypothalamic–pituitary–gonadal (HPG) axis, which regulates gametogenesis through coordinated changes in gonadotropins, sex steroids, and reproductive gene expression. The article highlights the fluctuations of key hormones such as GnRH, FSH, LH, estradiol, testosterone, 11-ketotestosterone, and maturation-inducing steroids during different maturation stages. Additionally, stage-specific expression patterns of genes including gnrh, fshβ, lhβ, vtg, cyp19a1a, dmrt1, and mpr receptors are analyzed. Environmental factors such as temperature, photoperiod, nutrition, and stress are also discussed in relation to their impact on reproductive physiology. The findings contribute to a deeper understanding of pikeperch reproductive biology and provide practical insights for improving aquaculture breeding strategies and broodstock management.
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