野生重口裂腹鱼[Schizothorax(Racoma) davidi(Sauvage)]的性腺发育观察与人工繁殖研究  

STUDY ON GONAD DEVELOPMENT AND PRELIMINARY ARTIFICIAL PROPAGATION OF WILD SCHIZOTHORAX (RACOMA) DAVIDI (SAUVAGE)

作　　者：彭淇[1] 吴彬[1] 陈斌[1] 冯健[1] 

机构地区：[1]广西大学水产研究所,南宁530004

出　　处：《海洋与湖沼》2013年第3期651-655,共5页Oceanologia Et Limnologia Sinica

基　　金：广西科技厅基金资助计划项目;2008-6-1-1号

摘　　要：对野生重口裂腹鱼[Schizothorax(Racoma) davidi(Sauvage)]的性腺发育观察与人工繁殖进行了研究。结果表明,重口裂腹鱼雄鱼3龄达到性成熟,而雌鱼5龄以上方达到性成熟,其性腺指数随着年龄增加而显著上升(P<0.05);雌鱼性腺指数、绝对怀卵量和卵径随着年龄和体重增加明显上升(P<0.05orP<0.01)。对24尾5、6龄雌、雄重口裂腹鱼采用二针注射法进行人工催产实验,平均采卵数为1.33万粒和2.02万粒,采精量为25.4ml和34.8ml。其平均卵子受精率和受精卵出膜时间分别为74.2%和77.1%、203h和227h[水温(16.2±0.9)℃],6龄雌鱼受精卵的卵径、卵重均明显高于5龄雌鱼,6龄雌鱼的受精卵孵化率为41.9%,明显高于5龄雌鱼的30.6%(P<0.05orP<0.01),选用年龄较大的雌鱼作为亲鱼,是保证人工繁殖获得良好效果的关键。We studied the gonad development and preliminary artificial propagation of wild Schizothorax （Racoma） davidi （Sauvage） in experiment. We discovered that the 3-year.male.fish reached sexual maturation, but for female fish, it was 5-year.fish; the index of sexual gland in the fish increased apparently along with the age （P〈0.05）, the absolutely fe- cundity and egg size of female fish increased with age and weight obviously （P〈0.05 or P〈0.01）. A test of artificial hasten parturition was proceeded to 24 brood stocks of 5-year.fish or 6-year.fish with twice injection method; the two brood stocks produces 13300 and 20200 eggs, 25.4mL and 34.8mL seminal fluids in average, the egg hatching rate 74.2% and 77.1%, insemination egg hatching time 203h and 227h [water temperature （16.2±0.9）℃], respectively. The egg size and egg weight that fertilized in brood stocks of age 6 are larger than those of age 5 obviously. The hatching rate of 6-year.fish was 41.9% greater than 30.6% of brood stocks of age 5 （P〈0.05 or P〈0.01）. Therefore, choosing elder female fish as brood stock is important in artificial operation of fish reproduction.

关 键 词：重口裂腹鱼 性腺 繁殖 人工繁殖 

分 类 号：S963.73[农业科学—水产养殖]