WURSIG and WURSIG: BEHAVIOR AND ECOLOGY OF THE DUSKY DOLPHIN 



42' 20 S 



CAMP 



10 km 



_L. 



8000 



9000 



10000 



IIOOO 



12000 



13000 



FIGURE 1— Map of Golfo San Jose on Peninsula Valdes, Argentina (a). The bay is about 750 km^ in area, with a 7 km wide mouth 

 opening to the Atlantic. The lined area in the southeast portion of the bay represents the study area. The crosshatched subsection is 

 shown in detail in b. It is a depth contour map of one-fourth of the study area. Margin numbers represent meter distances relative to a 

 zero location on land. Crosses form 1 km squares. "Cliff Hut" and "Camp" are the locations from which most observations were made. 

 Depth contours are in meters at mean low water ( MLW). The usual distance for good observation of a moving dolphin group was at least 

 3 km. At a normal tide height of 5 m above MLW, water depth of 40 m was 1 km from Cliff Hut, and thus clearly visible. The map is from 

 a larger area map which was by courtesy of Roger Payne, New York Zoological Society; Oliver Brazier, Woods Hole Oceanographic 

 Institute; and Russ Charif, Harvard University. 



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