sampler, its use, and methods of calcu- 

 lating numbers of organisms were given 

 under methods in report for cruise 1 . 

 Counts are given by compartment for 

 major groups as indicated. 



4. Numbers and species of fish taken by trol- 

 ling, table 11 . The stage of gonad devel- 

 opment is based on International Council 

 classifications of gonad maturity for the 

 herring (International Council Rapports 

 et Proces-Verbaux des Reunions, Vol. 

 LXXIV, pp. 117, March 1931). The 

 scale is only a guide to general classifi- 

 cations and must be treated as such. 



Stage VI . Roe and milt running (spawning) . 



Stage VII. Spents. Ovaries slack with 



residual eggs . Testes baggy, 

 bloodshot. Doubtful cases are 

 indicated by quoting two stages 

 e.g. "St. l-II, St.VII-II, •■ etc. 



5. Numbers and species of fish taken by dip 

 net, table 12. There is shown, by family, 

 the genera and species taken. Numbers 

 of specimens from each station are given 

 in parentheses, followed by the approx- 

 imate size or size range of standard length, 

 in millimeters . 



This scale follows: 



Stage I . Virgin individuals . Very small 

 sexual organs close under ver- 

 tebral columm . 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 recovering 

 spents . Ovaries somewhat long- 

 er than half the length of ventral 

 cavity, about 1 cm . diameter . 

 Eggs small but visible to naked 

 eye . Milt whitish, somewhat 

 bloodshot, same size as ovaries, 

 but still thin and knife -shaped. 



Stage III. Sexual organs more swollen, 

 occupying about half of ventral 

 cavity. 



Stage IV . Ovaries and testes nearly filling 

 2/3 of ventral cavity. Eggs not 

 transparent, milt whitish, sv.ol- 

 len. 



Stage V . Sexual organs filling ventral 



cavity. Ovaries with some large 

 transparent eggs . Milt white, 

 not yet running. 



ACKNOWLEDGMENTS 



Acknowledgment is made to the following 

 agencies and individuals for contributions in 

 securing and processing the material present- 

 ed. To the Navy Hydrographic Office for their 

 cooperation in planning and executing the field 

 program and for processing the physical ocean- 

 ographic data . To the Office of Naval Research 

 and Dr. Sidney R. Caller in particular, for 

 help in planning and executing the field pro- 

 gram. To the Georgia Game and Fish Commis- 

 sion for their cooperation in the biological and 

 chemical studies; through Frank T. Knapp, 

 biologist and Joseph L. Moore, chemist. To 

 the Florida State Board of Conservation 

 (through the Marine Laboratory of the Univer- 

 sity 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 prepar- 

 ation of the salinity, temperature, and density 

 profiles which appear as figures 5-20. 



From our own staff special recognition is 

 due Frederick H . Berry for identification of 

 dip-net and stomach content material, and to 

 Hugh M. Fields for plankton organism counts. 

 We appreciate the assistance of other members 

 of the staff who aided in one way or another: 

 Charles P. Goodwin, Clyde C. Bryant, Herbiert 

 R. Gordy, Charlie B. Casper, and Elizabeth H. 

 Swindell. Acknowledgment is also made of the 

 excellent cooperation of crew members of the 

 M/V Theodore N. Gill , and Captain Mauritz C. 

 Fredricksen in particular. 



