FISHERY BULLETIN: VOL. 73, NO. 4 



1.0 and Y is not a simple percentage of X If /3 is a 

 constant, then the log ^q of the two measures will be 

 linearly related: 



Log io(iO = Logio(a) + /3Log io(X). (2) 



In the sections which follow, we will show that in 

 most cases j8 9^ 1.0 and equation (2) is adequate for 

 describing the linear relationship between log 

 transformed measures of biomass. 



METHODS 



The station locations where samples were 

 collected are shown in Figure 1 (symbol key given 

 in Table 1). At many of these stations, more than 

 one sample was collected. A single symbol may 

 represent a number of collections as indicated in 

 Table 1. Not shown are the stations of Gosnold 140, 

 a cruise to the coastal upwelling region off Peru. 



Collections were made with 70-cm or 100-cm 

 diameter ring nets, 70-cm diameter Bongo nets 



(McGowan and Brown 1966), or the 50x 50 cm net 

 (Be et al. 1971), all equipped with a flowmeter 

 (Table 1). In shallow regions, Buzzards Bay, 

 Atlantis II 52 (continental Atlantic shelf), Gosnold 

 140 (Peru Current), Gosnold 166 (New York Bight), 

 tows were made to near the bottom. In deeper 

 waters, oblique tows were generally made to below 

 300 m. 



Ring net collections were generally split with a 

 plankton splitter (McEwen et al. 1954). One-half 

 was preserved in 10% buffered Formalin^ for 

 displacement volume analysis and the other half 

 was frozen in a chest freezer for wet weight, dry 

 weight, and carbon analyses (re Bermuda Table 1: 

 Menzel and Ryther (1961) do not state how this 

 half was stored prior to analysis). A similar 

 procedure was carried out for Bongo net collec- 

 tions; one of the paired samples was preserved in 

 Formalin while the other was frozen. 



^Reference to trade names does not imply endorsement by the 

 National Marine Fisheries Service, NOAA. 



100* 



9Cf .,„„„„.. 80- 70- 60- 



Figure 1. -Location of zooplankton collection sites. For symbols, see Table 1. 



50' 



778 



