International Journal of Oceanography

Research Article

Environmental Influences on South African Fish Catch: South Coast Transition

Table 2

Pairwise cross-correlations (upper) and multivariate statistics at 0-1 yr lead time. Variables are: Sal1: mode-1 salinity 0–200 m, Temp1: mode-1 temperature 0–200 m, Z3: mode-3 850 hPa geopotential height, Rain: rainfall over South Africa and Agulhas Current, SALa: Salinity 0–200 m Agulhas Current, SSHa: sea surface height Agulhas Current, Ua: zonal component of Agulhas Current, Va: meridional component of Agulhas Current, Tugl: Tugela River outflow, Nino3: central Pacific SST. Most influential variable is Salinity in the Agulhas Current (SAL a).


Cross-correlation of variable with fish catch

	Sal1	−0.38	Temp1	+0.34
	Z3	+0.26	Tugl	−0.44
	Rain	−0.40	SALa	−0.55
	SSHa	+0.28	Ua	+0.37
	Va	+0.30	Nino3	+0.29

Regression model summary output

	Multiple R		0.73
	Adj R Sq		0.46
	St. Error		0.73
	Sample		31

	df	SS	MS	F

Regression	4	15.99	4.00	7.42
Residual	26	14.01	0.54

	Coeff	St Error	t Stat	P val

Temp1	0.47	0.17	2.72	0.01
SALa	–0.53	0.16	–3.24	0.00
Ua	0.34	0.20	1.67	0.11
Z3	0.36	0.22	1.66	0.11