TABLE III 



ESTIMATED DAYTIME FISH CONCENTRATIONS AT THREE DEPTH 

 INTERVALS IN TOW ID WITH THE B^ MPS, AREA BRAVO, NOVEMBER 1965 



SAMPLE DEPTH (m) TOTAL FISH CATCH FISH/1000 m^ 



Shallow 600-0 2 0.4 



Middle 800-600 17 4.6 



Deep 1000-800 96 29.6 



The invertebrates that were separated and enumerated in the open 

 net oblique hauls taken by the GILLISS between the surface and about .110 m 

 show great variability in numbers between the day and night collections with 

 no apparent pattern. The invertebrates taken in the oblique open net hauls by 

 the SANDS between the surface and about 140 m tend to be more numerous in 

 the night tows than in the day tows. This is particularly true of the crustaceans 

 in general except that the numbers of carideans seem to remain about the same. 

 The siphonophores, enumerated as numbers of nectophores, vary widely but seem 

 in general to be more numerous in the night hauls. The most striking feature 

 about the numbers of invertebrates in Tow 1-D taken by the GILLISS in the 

 daytime, is that virtually all siphonophores were taken in the shallow sample, 

 600 m to the surface. The numbers of crustaceans in haul 1-D varied with no 

 real pattern, though identification of the material to species would probably 

 disclose definite depth distributional patterns. 



C, Other Western Atlantic Stations 



Investigations were carried out at three other stations in the western 

 North Atlantic Ocean, outside of Area Bravo (Figure 1). Stations 2 #4 and 8 

 were both at the edge of the Sargasso Sea. Station 9 was not far off the coast 

 in the main part of the Gulf Stream. 



Oceanographic conditions in the vicinity of Station 8 were quite 

 similar to those in Area Bravo. The hydrographic cast was not successful at 

 Station 9, so little information was obtained about the oceanographic conditions 

 there. 



Four net hauls were taken by the USNS LYNCH at the site of 

 2 #4 (Figure 1) using the MPS. Only Tow 2 #4, an oblique open night 



17 



