香鱼电照循环流水养成及人工采卵技术研究

Study on the Electricity Light of Plecoglossus altivelis According to Circulating Water Cultivation and Artificial Gather Eggs Technology

摘要: 为研究通过人为控制香鱼性腺发育，2011~2012年在福井县内水面综合中心开展了循环流水电照培养香鱼亲鱼试验。试验结果表明：2011年和2012年通过循环流水电照培养获得成熟的雌性亲鱼487和580尾；雄性亲鱼108和131尾。用干导法人工授精，受精率95.30%和80.67%；发眼率47.18%和48.15%，孵化率均为80.00%，获得孵化仔鱼317万和351万尾。本研究表明香鱼亲鱼在人工培养关键技术确立及成熟应用。人工电照培养亲鱼采卵的授精率、发眼率及仔鱼孵化率不如天然捕获亲鱼，但是能解决天然亲鱼由于气候等自然条件原因造成亲鱼数量及采卵不稳定因素，且具有人为控制育苗规模及提前开展人工育苗的优势。

Abstract: To artificially control gonad development of Plecoglossus altivelis, water recirculating and electric lighting were used to cultivate sweetfish broodstock in surface comprehensive center of Fukui prefecture in 2011-2012. The result showed: 487 and 580 mature females, 108 and 131 males were obtained respectively. In 2011 and 2012, 3.17 and 3.51 million hatching larvae were gained using a wet artificial method in 2011 and 2012, with fertilization success of 95.30% and 80.67%, eyed eggs of 47.18% and 48.15%, and common hatching rate of 80.00%. This study shows the es-tablishment and mature application of key technologies in artifically cultivating sweetfish broodstock. Fertilization rate, eyed larvae rate and hatching rate by artificial electric lighting are inferior to natural capture; however, it can solve the problem which brings many difficulties to natural capture, such as the instability of broodstock number and eggs collecting caused by climate and other natural conditions, and has advantages in artificially controlling breeding scale and time to carry out breeding plan in advance.