摘要
为了探索混养罗非鱼对对虾养殖水体水质因子及浮游植物群落结构的影响,于2011年6-8月在对虾养殖场选取一口池塘,设置24个围隔进行凡纳滨对虾与吉丽罗非鱼混养实验。实验分为6组(A、B、C、D、E、F组),F组为对照组不放养罗非鱼。对养殖水体相关水质理化因子和浮游植物群落结构进行跟踪调查,结果显示:(1)养殖期间DO含量各组之间无显著性差异;各组围隔亚硝氮和氨氮的含量养殖前期接近,养殖后期则有较大差异,其中实验C、D组显著低于A、B、E组和对照F组(P<0.05);COD和TOC含量对照组均小于实验组,实验组中养殖后期A、B组含量大于C、D、E组;TN、TP的增加量为A组最高,F组最低,实验组之间A、E组增加量高于B、C、D三组;(2)围隔中共鉴定出浮游植物4门36种,优势度较高,优势种单一,优势种基本上为小型种类;叶绿素a含量为实验组高于对照组,而实验组之间A、B组高于其它三组。结果表明虾池中混养适当密度的罗非鱼有利于改善水质,调节浮游植物的种类及数量。
Litopenaeus vannamei-GILI tilapia enclosure polyculture experiment was conducted in Dianbai, Maoming city, Guangdong province from June to August, 2011. Selecting an experiment pond, and setting up 24 enclosures. These enclosures were divided into six groups （A, B, C, D, E, F）, each group has four parallels, among these groups F was control group, not stocking tilapia. During aquaculture time, investigations of water quality factors and phytoplankton community were conducted . The results showed as follows： （1） Throughout the culture period, dissolved oxygen content was close in all groups. Nitrite and ammonia concentration showed an increasing trend in each group, and among them, C and D groups were significantly lower than A, B, E and F groups （ P 〈 0.05 ）. The concentration of COD and TOC were experimental groups higher than control groups. In the experimental groups, A and B groups were higher than C, D and E groups. As for the increase amount of TN and TP, group A is highest, control group F is lowest, while in experimental groups, A and E were higher than B, C and D groups. （2） 36 phytoplankton species were identified during the culture period. Dominant species is single and prominent. Experimental groups Chlorophyll a content were higher than control group, and between the experimental groups, A and B were higher than other three groups. These results indicate that polyculture appropriate density of tilapia in shrimp ponds is conducive to improving water quality, and can regulate and control the type and quantity of phytoplankton.
出处
《上海海洋大学学报》
CAS
CSCD
北大核心
2013年第5期698-705,共8页
Journal of Shanghai Ocean University
基金
十二五国家科技支撑计划项目(2011BAD13B03)
国家自然科学基金(30800851)
广东省科技计划项目(粤科函财字[2009]627号)
关键词
凡纳滨对虾
吉丽罗非鱼
水质因子
浮游植物
群落结构
Litopenaeus vannamei
GILl tilapia
water quality factors
phytoplankton
community structure
