Journal of Tropical Oceanography ›› 2011, Vol. 30 ›› Issue (4): 85-91.doi: 10.11978/j.issn.1009-5470.2011.04.085cstr: 32234.14.j.issn.1009-5470.2011.04.085

• Marine biology • Previous Articles    

Water quality and survival rate for intensive culture of white leg shrimp,  Litopenaeus vannamei, under different cultural density in tropic area of China

ZHANG Lü-ping, HU Chao-qun, SHEN Qi, REN Chun-hua   

  1. Key Laboratory of Marine Bio-resources Sustainable Utilization, LMB, South China Sea Institute of Oceanology, CAS, Guangzhou
    510301, China
  • Received:2009-11-25 Revised:2010-04-21 Online:2011-09-05 Published:2011-09-08

Abstract:

This paper reports characters of nine water quality parameters, such as pH, dissolved oxygen (DO), total alkali (TA),
chemical oxygen demand (COD), biological  oxygen demand (BOD), hydrogen sulfide (H2S), nitrogen of nitrite (NO2-NT),
nitrogen of ammonia (NH4-NT), and concentration of live Vibrio (CLV), under different cultural density of Litopenaeus van-
namei in a typical outdoor intensive shrimp farm located in Hainan province, a tropic area of China. The relationship between
each parameter of water quality and the number of dead shrimp was explored. Statistical analysis suggested that the signifi-
cantly related water parameters  to shrimp mortality are DO, NH4-NT, NO2-NT, H2S, and CLV. There are typical linear regres-
sion relationships between these parameters of water quality and shrimp mortality. The other four water parameters, including
pH value, total alkali, COD, and BOD, do not significantly affect shrimp mortality. The survival rates are 80.44%, 75.16%, 51.74%,
and 44.43% under four cultural densities of 70, 100, 120, and 150 PL·m−2
, respectively. The appropriate cultural density of Litopenaeus vannamei for the outdoor intensive system in a tropic area is suggest to be 70-100 PL·m−2
.

Key words: Litopenaeus vannamei, intensive culture, cultural density, water quality parameters, survival rate