养殖光唇鱼生长的初步研究

以浙江新昌县人工育成的光唇鱼为试养对象,研究了2010世代(4～15月龄)及2009世代(16～27月龄)光唇鱼的雌雄间生长差异、生长特性及体型变化等。结果表明:雌雄鱼在全长、体高、体宽及体重上存在极显著差异,2010世代及2009世代光唇鱼的生长速度均为雌鱼明显快于雄鱼。2010世代光唇鱼全长与体高、体宽及体重的相关关系分别为Lt=0.268+4.932Hb(r=0.9568)、Lt=0.236+9.014D(r=0.9941)、W=8×10-3Lt3.087(r=0.9921);2009世代光唇鱼全长与体高、体宽及体重的相关关系分别为Lt=1.255+4.726Hb(r=0.9613)、Lt=1.364+8.281D(r=0.9534)、W=7×10-3Lt3.179(r=0.9623);2010世代光唇鱼4-8月间生长速度较快,2009世代光唇鱼6-8月的繁殖季节生长速度较慢;雌雄鱼体型上存在差异,2010世代及2009世代光唇鱼的全长/体高、全长/体宽、体高/体宽、全长/头长、头高/体高及尾柄长/尾柄高6个指标各月间差异极显著,全长/头高各月间差异不显著。研究亮点:光唇鱼为浙江省土著溪流性鱼类,有较高的经济价值,目前相关其生长的研究尚未见报道。本文通过对养殖光唇鱼周年生长的研究,发现光唇鱼雌鱼生长速度明显快于雄鱼,可能适合单雌养殖;并通过对不同养殖模式下光唇鱼生长的比较,发现网箱养殖方式可能更适合该鱼的规模化养殖。

Primary study on the growth of Acrossocheilus fasciatus in cultivation

Growth characteristics of generation 2010(4 to 15 months after hatching) and generation 2009(16 to 27 months after hatching) A.fasciatus were studied in Xinchang of Zhejiang province,including the male and female growth difference,growth feature and the change in body shape.The results show that there are quite significant differences on the total length(L_t),body height(H_b),body width(D) and body weight(W) between male and female,the growth rate of female is faster both generation 2010 and generation 2009 in this species.The growth equation of generation 2010 and generation 2009 A.fasciatus are L_t=0.268+4.932H_b(r=0.9568),L_t=0.236+9.014D(r=0.9941),W=8×10-3L_t3.087(r=0.9921) and L_t=1.255+4.726H_b(r=0.961),L_t=1.364+8.281D(r=0.9534),W=7×10-3L_t3.179(r=0.9623),respectively.The generation 2010 A.fasciatus has a fast growth rate from April to August,whereas generation 2009 A.fasciatus grows slow from June to August in breeding period.During the whole growth process,there is difference on the body shape between male and female.There are quite significant differences on the total Length/body height,total length/body width,body height/body width,total length/head length,head height/body height and caudal peduncle length/caudal peduncle height indexes of generation 2010 and generation 2009 A.fasciatus each month,while the total length/head height index has no significant difference in the same case.