similar. Two Hardy Plankton Recorders were 

 lost this year when the towing wire parted; 

 one on cruise no. 57 on February 26, and the 

 other on cruise no. 58 on March 30. Both 

 instruments were being towed at 10 meters. 

 Positions of drift bottle releases and recover- 

 ies for 1955 may be found in Bumpus and Day 

 (1957). 



LABORATORY EXAMINATION OF SAMPLES 



One-Meter Net Tows and Hardy Plankton 

 Recorder 



Analysis of the data taken with the 1-meter 

 net and Hardy Plankton Recorder during this 

 year was carried out in the same manner 

 as that presented in the first report (Marak 

 and Colton, 1961). Figures 1-4 show the loca- 

 tions of 1 -meter net tows and tables 6-9 

 give the data collected. The locations of 

 individual gauze sections exposed by the Hardy 

 Plankton Recorder are shown in figures 5-12 

 and the data obtained from these sections are 

 given in tables 10-13. The section equivalent 

 varied slightly with individual recorders and 

 among distances covered (see tables 14-17). 

 Because of the loss of Hardy Plankton Re- 

 corders on cruise no. 57 and cruise no. 58, 

 data are lacking for part of these cruises. 

 Actual locations of 1-meter tows and refer- 

 ence gauze sections are given in tables 2-5. 



Temperature and Salinity 



Surface temperatures were used in the 

 graphic presentation in this report as they 

 were generally found to be indicative of 

 temperatures in the depths of water studied 

 (surface and 10 meters). Figures 13-16 show 

 the distribution of surface temperature with 

 observed values rounded off to the nearest 

 whole °F. In areas of rapid temperature 



change (southern and southeast edge of Georges 

 Bank) some isotherms were omitted to avoid 

 confusion. Figures 1-4 show the distribution 

 of surface salinity with observed figures 

 rounded off to the nearest 0.5 °/ ao . Actual tem- 

 perature and salinity figures may be found in 

 tables 2-5. 



Drift Bottles 



A detailed analysis of the data obtained from 

 the drift bottles released on these cruises 

 made during the spring of 1955 has been 

 reported by Day (1958). 



LITERATURE CITED 



BUMPUS, DEAN F., and C. GODFREY DAY 



1957. Drift bottle records for Gulf of Maine 

 and Georges Bank, 1931-56. U.S. Fish 

 and Wildlife Service, Special Scientific 

 Report--Fisheries No. 242, 61 p. 



DAY, C. GODFREY 



1958. Surface circulation in the Gulf of 

 Maine as deduced from drift bottles. 

 U.S. Fish and Wildlife Service, Fishery 

 Bulletin 141, vol. 58, p. 443-472. 



HARDY, A. C. 



1936. The continuous plankton recorder. 

 Discovery Reports, vol. 11, p. 457-510. 

 1939. Ecological investigations with the 

 continuous plankton recorder: object, 

 plan and methods. Hull Bulletins of 

 Marine Ecology, vol. 1, no. 1, p. 1-57. 



MARAK, R. R., and J. B. COLTON, JR. 



1961. Distribution of fish eggs and larvae 

 temperature, and salinity in Georges 

 Bank-Gulf of Maine area, 1953. U.S. 

 Fish and Wildlife Service, Special Scien- 

 tific Report—Fisheries No. 398, 61 p. 



