In order to understand the growth characteristics of Varasper variegates under industrial farming conditions, an one-year experiment was conducted on juvenile Varasper variegates with the water temperature being 9 ~ 22.5 ℃, and the body weight and length were measured and analyzed. The results showed that after one year artificial rearing, the mean body weight and mean body length of the 5-month-old juveniles increased from (22.11±1.03)g and (9.29±0.16)cm to (647.97±12.54)g and (36.15±0.36)cm, respectively. There was a linear relationship between the total length and month age: L=1.492x+2.35, R2=0.966, with the body length increasing by 2.44 cm averagely per month and an instantaneous length growing ratio of 0.12. There was a power function relationship between body weight and month age: Wgc=9.380e0.264x, R2=0.960, with the body weight increasing by 56.92 g averagely per month and an instantaneous weight growing rate of 0.31.The length-weight relationship was Wwl=0.030x2.971, R2=0.967, the power was close to 3, showing that body weight was positively related to the cube of body length and the juvenile fish was of isometric growth. Under industrial farming conditions, the body weight gain, relative weight growth rate, instantaneous weight growing rate of juvenile Verasper variegatus were in line with the changing of water temperature, and the weight of juvenile fish grew more rapidly at the water temperature of 16~18℃; while the growth indices and growth constant reflecting growth stage of juvenile fish, showed no regularity, and the body weight was significantly negative related to body length, showing the juvenile Verasper variegatus were at allometric growth stage.
YAN Junli1
,
2
,
CHEN Siqing1
,
WANG Zhenjie1
,
2
,
YAN Jingping1
,
CHANG Qing1
,
LIU Changlin1
,
HU Jiancheng
. A preliminary study on juvenile growth performance of Verasper variegates under industrial aquaculture[J]. Fishery Modernization, 2017
, 44(1)
: 15
-20
.
DOI: 10.3969/j.issn.1007-9580.2017.01.004