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Evaluation of limnological dynamics in Nile tilapia farming tank

Aquaculture and Fisheries 2021年第5期6卷 485-494页

作者： Antonio Cesar Godoy Lucas Ulisses Rovigatti Chiavelli Jarred Hugh Oxford Rômulo Batista Rodrigues Igor de Oliveira Ferreira Arypes Scuteri Marcondes Claucia Aparecida Honorato Silva Dacley Neu Universidade Estadual de Maringá Av.Colombo5790Centro de Ciências ExatasDepartamento de QuímicaMaringáPRBrazil University of Georgia Poultry Science DepartmentAthensGAUSA alves 7712Porto AlegreRSBrazil Universidade Federal da Grande Dourados Faculdade de Ciências AgráriasRodovia Dourados-Itahumkm 12Cidade UniversitáriaDouradosMSBrazil

For fish farming,water is the limiting factor for good *** characteristics determine the health and the productivity of the fish and can indicate possible problems arising in the *** present study aimed to verify the nictemeral and vertical dynamics of limnological characteristics in a tilapia farming tank coated with geomembrane and with low water *** were carried out in a 24 hour on period of 18 days with an interval of three hours between the water *** order to determine the vertical dynamics,water samples were taken at three depths(5,35,and 70 cm)in the central region of the *** was found that the parameters analyzed showed changes in the *** oxygen and pH changed sharply in the 24-hour period(p$<0.05$),with values of 3.86 mg L$^{-1}$at 6:00 AM and 18.39 mg L$^{-1}$at 3:00 PM;and 8.0 at 06:00 AM and 9.65 mg L$^{-1}$at 6:00 PM,*** respect to the three layers of the tank,the difference between the values of dissolved oxygen in the epilimnion and the metalimnion(above 14 mg L$^{-1}$)is clear,while in the hypolimnion the concentration of this oxygen was 7.57 mg L$^{-1}$(p$<0.05$).Nitrite and phosphorus had similar behavior,with more pronounced values in *** is a strong correlation between temperature and depth of the tank($r=-0.85,~p=5.86\times 10^{-9}$),depth and dissolved oxygen($r=-0.77,p=9.97\times 10^{-6}$),temperature and ammonia($r=-0.82,~p=6.33\times 10^{-8}$),depth and ammonia($r=0.79,~p=4.79\times 10^{-7}$),and nitrite and dissolved oxygen($r=-0.72,~p=2.15\times 10^{-4}$).The principal component analysis showed that there was a separation between the strata epilimnion,metalimnion,and *** response surface analysis showed the interaction between depth,temperature and the variables dissolved oxygen,ammonia,and *** result of this study helps to illustrate the dynamics of a tilapia tank covered with geomembrane and low water renewal ove

关键词： Water quality Fish ponds nictemeral Principal component analysis Response surface

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