Zooplankton — Bary 
49 
Physiological adaptability probably plays a 
major part in deciding whether a species will 
survive such a transfer. For example, "In- 
tolerant” species, because they were appar- 
ently unable to adapt readily, show sharp re- 
ductions in numbers as coastal water is 
reached, while the more adaptable "Tolerant” 
species penetrated into it more freely (Figs. 
Fig. I 9 A, B. The distribution of the four planktonic groups in relation to temperature for A. January 1951; 
Stations 1-6. B. March 1951; Stations 320-343. 
INSET: November 1951; Stations 795-921. 
The break in temperatures across the subtropical convergence in B are drawn in conjunction with data from 
the surface thermograph trace, Figure Ab. The symbols for the planktonic groups, and the scale of abundance, 
are as in Figures 10-21. 
