5. Numbers of plankton organisms per cubic 

 meter of water (continuous plankton 

 sampler ), table 12. Description of 

 this sampler, its use, and methods of 

 calculating numbers of organisms were 

 given under methods in report for 

 cruise 1. Counts are given by compart- 

 ment for major groups as indicated. 



6. List of the species of fish in dip-net , 

 trolling, and stomach contents collec - 

 tions (D-dip net; T-trolling; S-stomach 

 contents ), table 13- The species are 

 listed in alphabetical order, followed 

 by symbols indicating method of capture. 



7. Numbers and species of fish taken by 

 trolling , table Ik. The stage of gonad 

 development is based on International 

 Council classifications of gonad matu- 

 rity for the herring (international 

 Councils Rapports et Proces-Verbaux des 

 Reunions, Vol. LXXIV, pp. 117, March 

 1931 ) • The scale is only a guide to 

 general classifications and must be 

 treated as such. 



This scale follows : 



cavity. Eggs not trans- 

 parent, milt whitish, 

 swollen. 



Stage V. Sexual organs filling 



ventral cavity. Ovaries 

 with some large trans- 

 parent eggs. Milt white, 

 not yet running. 



Stage VI. Roe and milt running 

 (spawning) . 



Stage VII. Spents. Ovaries slack 

 with residual eggs. 

 Testes baggy, bloodshot. 

 Doubtful cases are indi- 

 cated by quoting two 

 stages e.g. "St. I-II, 

 St. VII- II," etc. 



Numbers and species of fish taken by 

 dip net , table 15- There is shown, by 

 family, the genera and species taken. 

 Numbers of specimens from each station 

 are given in parentheses, followed by 

 the approximate size of size range of 

 standard length, in millimeters. 



Stage I. Virgin individuals. Very 

 small sexual organs close 

 under vertebral column. 

 Wine-coloured torpedo- 

 shaped ovaries about 2-3 

 cm. long and 2-3 mm. thick. 

 Eggs invisible to naked 

 eye. Whitish or grayish 

 brown knife-shaped testes 

 2-3 cm. long and 2-3 mm. 

 broad. 



Stage II. Maturing virgins or re- 

 covering spents. Ovaries 

 somewhat longer than half 

 the length of ventral- 

 cavity ; about 1 cm. dia- 

 meter. Eggs 3mall but 

 visible to naked eye. Milt 

 whitish, somewhat blood- 

 shot, same size as ovaries, 

 but still thin an! knife - 

 shaped . 



Stage III. Sexual organs more swollen, 

 occupying about half of 

 ventral cavity. 



Stags TV. Ovaries and testes nearly 

 filling 2/3 of ventral 



. ACKNOWLEDGMENTS 



Acknowledgment is made to the follow- 

 ing agencies and individuals for contribur 

 tions in securing and processing the 

 material presented. To the Navy Hydro- 

 graphic Office for their cooperation in 

 planning and executing the field program 

 and for processing the physical oceano- 

 graphic data. To the Office of Naval 

 Research, and Dr. Sidney R. Galler in 

 particular, for help in planning and 

 executing the field program. To the 

 Georgia Game and Fish Commission for their 

 cooperation in the biological and chemical 

 studies; through Frank T. Knapp, biologist, 

 and Joseph E. Moore, chemist (now a member 

 of Fish and Wildlife Service staff). To 

 the Florida State Board of Conservation 

 (through the Marine Laboratory of the Uni- 

 versity of Miami) for their cooperation 

 in the biological studies, through George 

 F. Arata, Jr., biologist. To Dean F. 

 Bumpus of the Woods Hole Oceanographic 

 Institution for preparation of the salinity, 

 temperature, and density profiles which 

 appear as figures 5-lt>- 



From our own staff special recognition 



