Refining the Occurrence of Viral Encephalopathy and Retinopathy, Photobacteriosis, and Vibriosis in Connection with Seawater Physicochemical Parameters: A Five-Year Case Study Abstract Author Spinos, Efthimios University of Aegean, Department of Marine Sciences, Mytilene Lesvos 81100 Greece Author Katselis, Georgios University of Patras, Department of Fisheries and Aquaculture, Messolonghi, 30200 Greece Author Valsamidis, Michail Aggelos University of Aegean, Department of Marine Sciences, Mytilene Lesvos 81100 Greece Author White, Daniella Mari University of Aegean, Department of Marine Sciences, Mytilene Lesvos 81100 Greece Author Bakopoulos, Vasileios University of Aegean, Department of Marine Sciences, Mytilene Lesvos 81100 Greece text Mediterranean Marine Science 2024 2024-02-05 25 1 14 27 http://dx.doi.org/10.12681/mms.34893 journal article 10.12681/mms.34893 1108-393X 12552264

Table 2. Statistically significant coefficients of the harmonic multiple regression (HREG) models for physicochemical variables, presence/absence of diseases, and the annual and semi-annual frequency residuals between farms. N=3652, where T=temperature, TSD=standard deviation of T, S=salinity (psu), SSD=standard deviation of salinity, O=dissolved oxygen (mg/ml), OSD=standard deviation of oxygen, pH=pH, pHSD=standard deviation of pH, VAO1=Vibriosis, PHDP=Photobacteriosis, VER=Viral Encephalopathy & Retinopathy.

		Period (T i ) in days, xi=(2πt/T i )
	T	365.25		182.62				t-test results
Xt	a	Cos(x1)	Sin(x1)	Cos(x2)	Sin(x2)	r2	P	Fish farm
T	19.88	-3.26	-4.59	-0.45	0.10	0.95	0.000	B<A
TSD	0.66	-0.21	-0.10	0.13		0.28	0.000	B>A
S	38.54	-0.56	-0.34	0.19	0.19	0.67	0.000	B<A
SSD	0.19	-0.04		0.01		0.05	0.730	B=A
O	6.06	0.25	0.36	0.02	-0.02	0.96	0.000	B>A
OSD	0.05		-0.01	0.00	-0.02	0.22	0.390	B=A
pH	7.76	0.02	0.05	0.02	0.01	0.70	0.000	B<A
pHSD	0.01	-0.002	-0.002	0.001	0.003	0.12	0.890	B=A
VAO1	0.12	-0.03	0.10	0.03	0.05	0.07	0.910	B=A
PHDP	0.25	-0.19		0.08	0.08	0.15	0.950	B=A
VER	0.16	0.06	-0.28	-0.17	-0.08	0.46	0.960	B=A