我国鲆鲽类生殖内分泌研究进展

鱼类的生殖和苗种繁育是鱼类养殖业持续健康发展的必要前提和关键技术基础之一,是海洋生物技术的重要研究领域.近年来,我国北方沿海鱼类繁殖生理主要围绕鲆鲽类“下丘脑-垂体-性腺轴”的组织结构特征、性腺发育规律、性类固醇激素、生殖相关功能基因内分泌调控机制等方面开展了较系统的研究.本文重点介绍主要养殖鲆鲽类“下丘脑-垂体-性腺轴”中表达的重要功能基因的研究进展,并综述了鲆鲽类生殖相关组织的结构及其内分泌系统特征、性腺发育的生理特性及其与环境因子和激素诱导的关系、性类固醇激素的表达变化规律及其与水温及光周期调控关系等.旨在为鲆鲽类生殖活动的精准调控和建立苗种繁育新技术提供参考.

Research Progress of Reproductive Physiology of Flatfish in China

The key to sustain the development of marine finfish aquaculture is to improve the understanding of reproductive physiology, which will pave the way for the successful breeding programs and larviculture. Recently, in China, northern coastal research institutes have made significant advances in the field of reproductive physiology in flatfish with focus on the hypothalamus- pituitary-gonadal axis (HPG axis), including histological characteristics, gonadal development, plasma sex steroids, and reproductive endocrine and regulatory mechanisms. This paper summarized the mechanisms of important functional genes in the HPG axis using Cynoglossus semilaevis and Paralichthys olivaceus as examples. Furthermore, we provided here a synoptic contents of some of these important advances related to the HPG axis, including the histology and endocrinology of secretory tissue cells, physiological characters of gonads, environmental factors, hormone-induced spawning, temperature, photoperiod and sex steroid levels, with emphasis on C. semilaevis, Verasper moseri and Kareius bicoloratus. This paper aims to provide the guidance for new breeding programs and laviculture in flatfish.