中国紫蛤的栖息环境及肥满度研究

Study on natural habitat and condition factor of Hiatula chinensis

摘要: 以中国紫蛤（Hiatula chinensis）为研究对象，调查其自然产区饶平县大埕湾的环境条件，研究其生殖腺发育、肥满度的季节变化等。结果显示，大埕湾产区的中国紫蛤垂直分布于潮间带的低潮区至5 m水深以内区域，年水温变化范围16.3~29.0 ℃，盐度变化范围18.5~33.7，底质以粒径63~250 m的细砂质为主。中国紫蛤的肥满度变化范围5.74%~21.66%。由肥满度的变化规律结合性腺发育情况推断，中国紫蛤一年中有1个繁殖期，为7~9月。满1龄的贝可达性成熟。

Abstract: We investigated the habitat (Dacheng Bay, Raoping County), gonadal development and seasonal change of condition factor of Chinese sanguin (Hiatula chinensis). The results show that H.chinensis is vertically distributedfrom the low intertidal zone to the 5 m below the surface water of Dacheng Bay. The range of water temperature is 16.3~29.0 ℃ and that of salinity is 18.5~33.7; the sediment is mainly the fine sand with granule diameter of 63~250 m. The condition factor of H.chinensis ranges from 5.74% to 21.66%. According to the changing rule of condition factor and the gonad development, H.chinensis has one reproductive period per year, from July to September, andmatured gonad can be found in the one-year old individuals.