养殖密度对玫瑰(鱼比)脂鲤生长、摄食及养殖水环境的影响
Effects of stocking density on the growth,feeding and aquaculture water environment of Hyphessobrycon rosaceus
廖睿 1孔德璇 1朱妍云 1Hebert Ely VASQUEZ 2郑兴 2於锋 2顾志峰3
作者信息
- 1. 海南大学海洋生物与水产学院,海南 海口 570228
- 2. 海南大学海洋生物与水产学院,海南 海口 570228;海南大学三亚南繁研究院,海南 三亚 572000
- 3. 海南大学海洋生物与水产学院,海南 海口 570228;海南大学三亚南繁研究院,海南 三亚 572000;海南大学淡水渔业海南省工程研究中心,海南 海口 570228;海南大学海南省热带水生生物技术重点实验室,海南 海口 570228
- 折叠
摘要
为探究养殖密度对玫瑰(鱼比)脂鲤生长、摄食及养殖水体的影响,将体质量为(0.63±0.17)g、体长为(29.41±2.23)mm的玫瑰(鱼比)脂鲤放于水族缸中,分别设置 1 500、2 250、3 000、3 750、4 500、5 250、6 000尾/m3 7 个养殖密度(D1～D7 组),观测其生长及水质指标,试验周期为30 d.结果显示:试验过程中D6 组和D7 组玫瑰(鱼比)脂鲤的存活率分别在第 12 天和第 9 天低于 60%,因此停止后续试验.试验结束,D5 组存活率为(97.78±1.11)%,其他组均为 100%.经 30 d养殖,D2 组的体质量相对增长率(WGR)和体质量特定生长率(SGR)分别为(59.91±16.79)%和(1.55±0.35)%/d,显著高于其他组(P<0.05),D5 组的体质量特定生长率(SGR)最低,为(0.36±0.09)%/d.饲料系数随养殖密度的提高呈先下降后上升趋势,D2 组饲料系数最低,为 1.96±0.55,D5 组的饲料系数(10.17±2.64)显著高于其他组(P<0.05).水质指标受养殖密度影响明显较大,试验最后,随养殖密度的增加,氨氮质量浓度呈上升趋势,亚硝酸盐氮呈先下降后上升的趋势.试验结束时,D5 组硝酸盐氮质量浓度[(33.95±4.61)mg/L]显著高于其他组(P<0.05),D2 组的硝酸盐氮质量浓度最低,为(13.66±4.14)mg/L.研究表明,养殖密度对玫瑰(鱼比)脂鲤的生长性能、摄食状态以及水质有显著影响,其最适的养殖密度为D2(2 250 尾/m3),最适养殖密度下的体长(L)和体质量(W)的回归方程为WD2=1.61×10-5×LD23.13(R2=0.78).
Abstract
To investigate the effects of stocking density on the growth,feeding,and water quality of Hyphessobrycon rosaceus,individuals with an average body weight of(0.63±0.17)g and an average body length of(29.41±2.23)mm were placed in aquariums with seven different stocking densities(D1-D7):1 500,2 250,3 000,3 750,4 500,5 250,and 6 000 fish/m3,with a trial period of 30 days,during which growth and water quality indicators were observed.The results showed as follows:The survival rates of H.rosaceus in groups D6 and D7 fell below 60%on days 12 and 9,respectively,leading to the termination of those groups.At the end of the experiments,the survival rate of group D5 was(97.78±1.11)%,while all other groups had a survival rate of 100%.After 30 days of culture,the weight gain rate[WGR,(59.91±16.79)%]and specific growth rate[SGR,(1.55±0.35)%/d]of group D2 were significantly higher than those of the other groups(P<0.05),while the SGR of group D5[(0.36±0.09)%/d]was the lowest.With the increase of stocking density,the feed conversion ratio(FCR)initially decreased and then increased,with the lowest FCR(1.96±0.55)in group D2,and the highest FCR(10.17±2.64)in group D5,significantly higher than in other groups(P<0.05).At the end of the experiment,the concentration of ammonia nitrogen increased with stocking density,while nitrite nitrogen first decreased and then increased.The accumulated nitrate-nitrogen concentration in group D5[(33.95±4.61)mg/L]was significantly higher than other groups at the end of the experiment(P<0.05),while the accumulated nitrate nitrogen content was the lowest in group D2[(13.66±4.14)mg/L].The study indicated that stocking density significantly affected the growth performance,feeding status,and water quality of H.rosaceus,with the optimal stocking density being D2(2 250 fish/m3).The regression equation for body length(L)and body weight(W)at the optimal stocking density is WD2=1.61×10-5×LD23.13(R2=0.78).
关键词
玫瑰(鱼比)脂鲤/养殖密度/生长/摄食量/养殖水环境Key words
Hyphessobrycon rosaceus/stocking density/growth/feed intake/aquaculture water environment引用本文复制引用
出版年
2025
国家科技期刊平台
NSTL
万方数据