Effects of stocking density and exchanging water frequency on growth and inner quality of Whitmania pigra.
- Author:
Meng-Meng LI
1
;
Qiao-Sheng GUO
1
;
Hong-Zhuan SHI
1
;
Jia WANG
1
;
Dao-Xin DAI
1
;
Shi-Meng YAN
1
;
Heng-Ji QI
1
;
Xin LU
1
;
Li-Tao LIU
1
Author Information
- Publication Type:Journal Article
- Keywords: Whitmania pigra; anti-oxidative enzyme; digestive enzyme activity; exchanging water frequency; growth; stocking density
- From: China Journal of Chinese Materia Medica 2016;41(6):995-1000
- CountryChina
- Language:Chinese
- Abstract: The effects of stocking density and exchanging water frequency on growth, digestive enzyme activity, anti-oxidative enzyme and inner quality of Whitmania pigra Whitman were evaluated with corresponding measures. The results showed that the eventual biomass, specific growth rate, gained weight rate, activities of amylase, lipase, protease, SOD, CAT, and ALP correlated positively with stocking density and negatively with exchanging water frequency (P<0.05). Exchanging water frequency had negative correlation with ammonia nitrogen, nitrite, and hydrogen sulfide while revealed positive correlation with dissolved oxygen in the water. Stocking density and exchanging water frequency showed no significant effects on the contents of moisture, total ash, and acid-insoluble ash. It suggested that the optimum stocking density was 7.5 million per hectare and the appropriate exchanging water interval was 72 h.
