Cold temperature delays ovarian development of largemouth bass by inhibiting sex hormone release, angiogenesis, apoptosis and autophagy during out-of-season reproduction.

Cold temperature is an effective method of achieving out-of-season reproduction and obtaining fry in the autumn. This study investigated the effects of low-temperature (12-16 °C) environment on the out-of-season reproduction of largemouth bass, particularly the delayed effects on ovarian development. During the period of delayed out-of-season reproduction, there was a significant reduction in the levels of serum sex hormones (FSH and LH) and their respective receptors (FSHR and LHCGR). Exposure to cold temperature significantly reduced the expression of gonadal development genes (IGF-1, GDF9, and CDC2) (P<0.05) and diminished the vascular network on the ovarian membrane, as confirmed by angiogenesis-related analyses. In lipid metabolism, AMH mRNA levels decreased overall, while HSD3B, FABP1, APOA1, and APOC2 initially increased before declining. Serum VTG levels decreased gradually with a slight increase post-spawning. These findings suggested that cold temperature delay ovarian development in largemouth bass by impacting sex hormone synthesis, angiogenesis, and lipid deposition. This insight enhances our understanding of out-of-season reproduction and guides the development of more effective reproductive techniques.

• Publication year

  2024

• Venue

  Comparative biochemistry and physiology. Part A, Molecular & integrative physiology

• Publication date

  2024-12-01

• Fields of study

  Biology, Medicine, Environmental Science

• Identifiers
  DOI 10.1016/j.cbpa.2024.111795PMID 39709163
• External record

  Open on Semantic Scholar

• Source metadata

  Semantic Scholar, PubMed

• No claims are published for this paper.

• No concepts are published for this paper.

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