No range-wide survey has been conducted for this species. A published estimate of 800 -1,000 (Carwardine 2002) is not based on a survey and is only a guess. Surveys off the coast of southern Africa yielded approximate densities of 4.69 sightings per 100 nautical miles within 5nm of the coast, with relatively fewer sightings further offshore (Best 1984). Griffin and Loutit (1988) stated that Heaviside’s dolphins were the cetaceans most frequently seen from the Namibian coast.
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