DAGG ET AL.: DISTRIBUTION OF COPEPOD NAUPLII 



salinity were vertically stratified (Fig. 3b, 3c). 

 The same pattern was seen in the chlorophyll a 

 distributions (Fig. 4) and the nitrate distributions 

 (Fig. 5). 



Correspondence between chlorophyll a concen- 

 tration and naupliar abundance was computed; 

 the correlation coefficient for a linear regression 

 of chlorophyll concentration on naupliar abun- 

 dance for all 5 cruises in = 269) was 0.39, signifi- 

 cant at the 1% level. However, analysis of covari- 

 ance showed that the relationship between 



chlorophyll and naupliar concentration was sig- 

 nificantly different between cruises, and there- 

 fore the data from the 5 cruises should not be 

 pooled. Although a significant relationship be- 

 tween chlorophyll concentration and naupliar 

 concentration typically exists, it is not consistent 

 from cruise to cruise. Regression parameters and 

 correlation coefficients for each cruise are shown 

 in Table 4. Pairwise tests indicate that the slope 

 of the regression for cruise V was significantly 

 different from all the others, cruise IV was differ- 



I 



• CHLOROPHYLL a (ug/liter) 



2.0 3 4.0 10 2.0 



Figure 4. — The vertical distribution of chlorophyll a at the stations represented in Figure 2. 



NITRATE (ug-at/liter) 



Figure 5. — The vertical distribution of nitrate at the stations represented in Figure 2. 



325 



