Figure S1. Hovmöller plots for the offshore Agulhas Current region showing the latitudinally-averaged sea surface temperature (°C) from the shelf break (500m isobath) to 40.0°E, between latitudes 20.0°S and 33.0°S, for the two time periods January 1989 to December 1996, and January 2002 to December 2008.

Figure S2. Average overall catch per unit effort (fish/hr of diving ±1SE) of GP at each of two sites (Ballito, Scottburgh) and two time periods (1989-1997, 2002-2007).

Figure S3. Average species diversity (±1SD) and species evenness (±1SD) per 100 individuals shot by GP at each of Ballito and Scottburgh over the two time periods 1989-1997 and 2002-2007.

Table S1. Summary of model terms and statistics for minimal generalised linear models (GLMs).

Table S2. Results for general linear models examining variation in the overall number of fish speared by GP on each day of diving as a function of spear-fishing effort (time spent diving) and time period (1989-1997, 2002-2007) at each of the two dive sites (Ballito, Scottburgh).

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