. Commercial fisheries review. Fisheries; Fish trade. 42. 40° 39° 1 I I 1 r- III 1—r STATIONS HYDROGRAPHIC PLANKTON a HYDROGRAPHIC i I I -40 -39 73' 72 71 70' 69' 68' 67' 66° 65' 64' Plankton Operations Twenty-one 1-meter, 15-minute net tows (5 minutes at 20 meters, 10 meters, and at surface) were made during cruise (see chart). Larval herring obtained at 15 stations ranged from 6 mm. to 20 mm. with a mean of 11 mm. Hydrographic Operations Fifty-seven BT casts were made, surface salinities collected, and related weather con- ditions recorded. The temperatures ranged from C. (Sta. 31) to
. Commercial fisheries review. Fisheries; Fish trade. 42. 40° 39° 1 I I 1 r- III 1—r STATIONS HYDROGRAPHIC PLANKTON a HYDROGRAPHIC i I I -40 -39 73' 72 71 70' 69' 68' 67' 66° 65' 64' Plankton Operations Twenty-one 1-meter, 15-minute net tows (5 minutes at 20 meters, 10 meters, and at surface) were made during cruise (see chart). Larval herring obtained at 15 stations ranged from 6 mm. to 20 mm. with a mean of 11 mm. Hydrographic Operations Fifty-seven BT casts were made, surface salinities collected, and related weather con- ditions recorded. The temperatures ranged from C. (Sta. 31) to ° C. (Sta. 50) at surface, and from 4,1° C. (Sta. 56 at 100 meters) to ° C. (Sta. 4 at 40 meters and Sta. 53 at 75 meters) on the bottom. The lowest temperature was ° Cat station 6 at 75 meters (bottom was C. at 225 meters). Surface salinities ranged from o/oo at station #55 to o/oo at station 50. 'Rorqual' Studies Zooplankton Distribution The Rorqual cruised the waters off Cape Ann, Mass., to Eastport, Me., from Sept. 30- Oct. 10, 1968, to investigate the distribution of zooplankton and to monitor seasonal hydro- graphic conditions. (Cruise 8-68.). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original United States. National Marine Fisheries Service; U. S. Fish and Wildlife Service; United States. Bureau of Commericial Fisheries. [Washington] : National Marine Fisheries Service; [for sale by the Supt. of Docs. , U. S. Govt. Print. Off. ]
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