海南大学学报（自然科学版）2025，Vol.43Issue(1)：7-14,8.DOI:10.15886/j.cnki.hdxbzkb.2024031001
密度和饵料日投喂量对科斯塔氏直线脂鲤(Moenkhausia costae)养殖的影响
Effects of the stocking density and daily feeding amount on the cultivation of Moenkhausia costae
摘要
Abstract
In order to obtain the optimal farming density and daily feeding amount for the tropical freshwater ornamental fish Moenkhausia costae(M.costae),a recirculating aquaculture system was used,and the effects of the different stocking densities(0.5,1,and 1.5 individuals·L-1)and the different daily feeding amounts(3％,5％,and 7％of body weight)on the growth performance,feeding rate,and water quality indicators of M.costae were compared.The results indicated that the group with a stocking density of 0.5 individuals·L-1 and a daily feeding amount of 3％of the body weight exhibited the highest weight gain rate[WGR=(517.96±56.09)％],the specific growth rate[SGR=(3.03±0.15)％·d-1],and the lowest feed conversion ratio(FCR=1.08±0.02).Additionally,there were significant interactions between the stocking density and daily feeding amount and the FCR and feed intake(FI)of M.costae(P＜0.05).With the elevation of stocking density and feeding rate,FI,Ammonia nitrogen,and Nitrite increased.In the G9 group(stocking density of 1.5 individuals·L-1 and feeding rate of 7％),the highest concentrations of Ammonia nitrogen and Nitrite were observed,which was(0.56±0.07)mg·L-1 and(0.033±0.003)mg·L-1,respectively.The length-weight relationship was fitted with a power function,and the equation W=0.016 5L2.537 3(n=100,R2=0.987 3)was obtained.Under the conditions,the optimal farming density for M.costae was determined to be 0.5 individuals·L-1,with a suitable daily feeding amount of 3％of the body weight.Our findings provide the valuable information for the cultivation of M.costae,which are helpful for guiding the large-scale seed production.关键词
科斯塔氏直线脂鲤/养殖密度/日投喂量/生长性能/摄食率/水质Key words
Moenkhausia costae/stocking density/daily feeding amount/growth performance/feed intake/water quality分类
农业科技引用本文复制引用
何银加,於锋,许萱,邱达观,孔德璇,顾志峰..密度和饵料日投喂量对科斯塔氏直线脂鲤(Moenkhausia costae)养殖的影响[J].海南大学学报（自然科学版）,2025,43(1):7-14,8.基金项目
海南省自然科学基金(320QN207) （320QN207）
海南大学科研启动基金(KYQD(ZR)20061) （KYQD(ZR）
海南省院士创新平台建设项目(HD-YSZX-202011) （HD-YSZX-202011）
