南海区驯养条石鲷亲鱼的初次性成熟和产卵  

First maturation and spawning of cultured Oplegnathus fasciatus broodstock in the South China Sea

作　　者：区又君[1] 李加儿[1] 林锋 

机构地区：[1]中国水产科学研究院南海水产研究所,农业部南海渔业资源开发利用重点实验室,广东广州510300 [2]广东省饶平县江海特种养殖种苗服务中心,广东饶平515700

出　　处：《南方水产科学》2014年第5期82-86,共5页South China Fisheries Science

基　　金：广东省海洋渔业科技推广专项(A200901D01);中国水产科学研究院水产种质资源与养殖技术重点开放实验室基金课题(2007A014)

摘　　要：2008年4月初在广东省饶平县对2006年5月人工孵化和培育的2龄条石鲷（Oplegnathus fasciatus）成熟亲鱼进行激素诱导,研究和观察条石鲷亲鱼初次性成熟的繁殖生物学。结果显示,在南海区全人工养殖的条石鲷亲鱼初次性成熟年龄为2龄,成熟亲鱼的最小型为全长245 mm、体质量610 g,最大个体为全长300 mm、体质量1 450 g;产卵季节为4月10日～7月15日,产卵盛期为4月中旬至6月下旬;为升温产卵型鱼类,产卵温度为20.0～28.8℃,适宜的产卵温度为20.7～27.6℃;雌、雄亲鱼发育同步,个体大小和成熟年龄差别不大;雌鱼属于一年一次分批产卵类型,产卵期超过3个月;24尾初次性成熟雌性亲鱼的总产卵量为3 180.0×10^4粒,日最高产卵量为341.5×10^4粒;其产卵量和受精卵质量与水温的变化关系密切,受精卵的浮卵率随温度的变化而变化,在水温相对衡定时,浮卵率相对稳定并维持在80%～95%的较高水平;受精卵平均卵径为（0.860±0.023）mm,油球径为（0.191±0.009）mm。In early April of 2008, we carried out hormone inducement in 2-year-old Oplegnathusfasciatus broodstocks hatched in May of 2006 in Raoping of Guangdong Province, so as to investgate their reproductive biology for first maturation. Results show that in the South China Sea, it took 2 years for the first maturation with biological minimum size of 245 mm in total length and 610 g in weight, maximum size being 300 mm and 1 450 g for the O.fasciatus broodstocks by complete artificial breeding. Spawning season was from April 10 to July 15 with the peak period from middle April to late June. Being a thermo-dependent spawning type, the breeding temperature of the fish ranged from 20. 0～ 28. 8 ℃ with suitable temperature of 20. 7 - 27. 6 ℃. Development was synchronous for both sexes and no significant difference was found in size and mature age. Being an annual spawning multiplicity species, the breeding season of the fish lasted over three months, with total fecundity of 3 180. 0 ×10^4and maximum daily value of 341.5 × 10^4. Significant correlation was found among fecundity, quality of fertilized eggs and water temperature. When temperature was stable, the floating rate of eggs maintained at higher level of 80% -95%. Average diameter of fertilized eggs was （0. 860 ±0.023 ） mm and that of oil globule was （0. 191 ±0. 009） mm.

关 键 词：条石鲷 南海区 驯养 初次性成熟 产卵 

分 类 号：S965.2[农业科学—水产养殖]