FISHERY BULLETIN: VOL. 87. NO. 4, 1989 



SIMPLE, STATIC 





V 





o^o 



SIMPLE, SLIDING 



<^4. CP 



o o 



Figure 7. — Average number of sightings of dolpliin scliools per 1° square during the last 200 



a) simple, static, b) simple, sliding, 



872 



