Explorations in the Gulf of Maine, July and August, 1912, by the U.S. Fisheries schooner Grampus. Oceanography and notes on the plankton

No. 2. — Explorations in the Gulf of Maine, July and August, 1912, by the V. S. Fisheries Schooner Grampus. Oceanography and Notes on the Plankton. By Henry B. Bigelow. CONTENTS. Bav The cruise .... Equipment and methods Oceanography Surface temperature Temperature sections . Temperature at 25 fathoms Bottom temperatures . Temperature profiles Seasonal changes in Massachusetts Salinity ..... Surface salinity Salinity at intermediate depths Salinity at 25 fathoms Salinity at 50 fathoms Bottom salinity Salinity profiles Density Color .... Transparency Circulation in the Gulf of Maine Tidal currents Surface and bottom currents Circulation as shown by temperature and salinity Comparison with previous records of temperature and General considerations ..... Preliminary notes on the macroplankton . List of fishes ....... Larval and postlarval stages Adult stages ...... List of copepods ...... Distribution of the more important plankton species Calanus finmarchicus ..... Euchaeta norvegica ..... Anamalocera pattersoni .... salinity 32 35 42 43 48 54 55 56 58 62 62 64 6S 70 70 71 76 81 82 83 83 85 87 92 95 98 107 107 111 115 117 117 118 118