FISHERY BULLETIN: VOL 77. NO 3 



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• GRID STATIONS 



+ TRANSECT STATIONS 



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Figure l.— New York Bight with stations for oblique net tows for zooplankton ignd) and chlorophyll, nutrient, and hydrographic 



measurements igrid and transect). 



or 223 yLtm mesh were added to the sampling array 

 in 1975. These nets were 20 cm in diameter and 

 mounted as pairs on a bongo sampler rigged with a 

 flowmeter in one mouth. The 20 cm sampler was 

 attached to the towing wire immediately above 

 the 60 cm frame, and the entire array was towed 

 obliquely at 3.5 kn (6.5 km/h) from near bottom to 

 surface, except at stations exceeding 200 m where 

 tows were from 200 m to the surface. The samples 

 from the two nets on the 20 cm frame were com- 

 bined before preservation. 



From 8 to 19 of the 20 grid stations (Figure 1) 

 were sampled for zooplankton during the 11 

 cruises of the survey (Table 1). Samples were not 

 available for every station because of gear failure, 

 adverse weather, or contamination by algae or 

 sediments. At all grid and transect stations (Fig- 

 ure 1) XBT's and nonmetallic sampling bottles 



were used to obtain temperature, salinity, nutri- 

 ent, and chlorophyll data at discrete depths. 



Samples were analyzed separately for chaetog- 

 naths, copepods, and "other" zooplankton ( i.e., all 

 taxa other than chaetognaths and copepods). We 

 used only samples from 253 \xm. and 223 /itm mesh 

 nets to estimate the abundance of copepods and 

 other zooplankton in 1975 but had to rely on 333 

 /nm mesh nets for abundance estimates in 1974. In 

 the separate analyses of copepods and other 

 zooplankton, we removed aliquots from a sample 

 with a piston pipette until a total of 500 or more 

 individuals were identified and counted. We 

 counted chaetognaths only in collections from 333 

 /xm mesh nets , which retained most size classes of 

 these large-bodied animals. We used a Folson 

 plankton splitter to subsample collections with 

 large numbers of chaetognaths until a total of 200 



670 



