ftble 15. — Humbers of fish larvae per 100 m.3 of water. Continental Shelf 

 off Cape Canaveral Area, from plankton samples (oblique or 

 surface tow, half -meter net), T. N. GUI crulees 1953-54, by- 

 depth of vater and by season 



[ Individual valuec are counts for separate samples] 



0-20 fathoms 



Table I6. —Numbers of copepods per 100 m.^ of water. Continental Shelf off 

 Cape Canaveral Area. frcxD plankton saioples (oblique or surface 

 tow, half-meter net), T. N. Gill cruises I953-5I*, by depth of 



water and by season 



[Individual values are counts for separate samples] 



0-gO fathoms 



50,000 

 45,000 

 40,000 

 35,000 

 30,000 



-£ 25,000 



20,000 



1 5,000 



10,000 



5,000 



— 0-100 fathoms 

 ■ — 0-20 fathoms 

 20-100 fathoms 



Choetognaths 



Winter 



Spring 



Summer 



Fall 



Figure 10. — Numbers of copepods and chaetognaths per 

 100 m.3 of water. Continental Shelf off Cape Canaveral 

 Area, from plankton samples. T. N. Gill cruises 1953-54, 

 average values by depth of water and season. 



species occurred in all three seasons; spring, 

 summer, and fall samples. Three species 

 were found only in surface to 20 fathoms, and 

 16 species occurred only in 20 to 100 fathoms 

 (table 17). 



CHAETOGNATHS 



Numbers of chaetognaths per 100 m.3 of 

 water strained (table 18) ranged from 10 to 

 17,000. Average numbers for samples in 

 surface to 20 fathoms increased from a low 

 in the winter (2,237.5) through the spring 

 (2,715.0) and summer (5,574.4) to a high in 

 the fall (7,883.3). In 20 to 100 fathoms the 

 low was in the spring (792.5), with the winter 

 next (1,250.0), then the summer (1,868.3), 

 and the high in the fall (4,150.0). Average 

 spring and summer values in surface to 20 

 fathoms (2,715.0 and 5,574.4) were about 

 three times those for 20 to 100 fathoms 

 (792.5 and 1,868.3), and winter and fall values 

 in surface to 20 fathoms (2,237.5 and 7,883.3) 

 were a little less than twice those in 20 to 

 100 fathoms (1,250.0 and 4,150.0). For the 

 area as a whole similar low average values 

 (1,908.3 and 1,946.0) occurred in the winter 

 and spring; the average value doubled in the 

 summer (4,092.0); and by the fall the value 

 was approximately three times (6,390.0) those 

 of the winter and spring (table 18 and fig. 10). 



Pierce and Wass (1962) presented their 

 identifications and interpretations of occur- 

 rences of the adult forms of chaetognaths in 

 plankton samples from T. N. Gill cruises in 



30 



