CONTENTS 



Page 



Introduction 1 



Survey area 1 



Methods and procedures 1 



Discussion 3 



Acknowledgments 4 



Literature cited 4 



Tables 



1. Data and hydrographic equipment used on the FRS Oregon //groundfish cruises 3 



2. Mean bimonthly surface and bottom temperatures (°C) for each survey area 3 



Figures 



1. Primary fishing area for the industrial bottomfish fishery in the northern Gulf of Mexico 2 



2. Bimonthly mean difference between surface and bottom water temperatures and associated wind 



roses east of the Mississippi River Delta 5 



3. Bimonthly mean difference between surface and bottom water temperatures and associated wind 



roses off the Mississippi River Delta 6 



4. Bimonthly mean difference between surface and bottom water temperatures and associated wind 



roses west of the Mississippi River Delta 7 



5. Bimonthly mean air temperature for each survey area 8 



6. Bimonthly mean surface and bottom salinity east of the Mississippi River Delta 8 



7. Bimonthly mean surface and bottom salinity off the Mississippi River Delta 9 



8. Bimonthly mean surface and bottom salinity west of the Mississippi River Delta 9 



9. Cruise 40, surface temperature (°C), October 1972 10 



10. Cruise 40, bottom temperature (°C), October 1972 11 



11. Cruise 42, surface temperature (°C), November 1972 12 



12. Cruise 42, bottom temperature (°C), November 1972 13 



13. Cruise 44, surface temperature (°C), April 1973 14 



14. Cruise 44, bottom temperature (°C), April 1973 15 



15. Cruise 48, surface temperature (°C), November 1973 16 



16. Cruise 48, bottom temperature (°C), November 1973 17 



17. Cruise 51, surface temperature (°C), June 1974 18 



18. Cruise 51, bottom temperature (°C), June 1974 19 



19. Cruise 51, surface salinity (ppt), June 1974 20 



20. Cruise 52, surface temperature (°C), August 1974 21 



21. Cruise 52, bottom temperature (°C), August 1974 22 



22. Cruise 52, surface salinity (ppt), August 1974 23 



23. Cruise 52, bottom salinity (ppt), August 1974 24 



24. Cruise 55, surface temperature (°C), November 1974 25 



25. Cruise 55, bottom temperature (°C), November 1974 26 



26. Cruise 55, surface salinity (ppt), November 1974 27 



27. Cruise 55, bottom salinity (ppt), November 1974 28 



28. Cruise 57, surface temperature (°C), March 1975 29 



29. Cruise 57, bottom temperature (°C), March 1975 30 



30. Cruise 57, surface salinity (ppt), March 1975 31 



31. Cruise 57, bottom salinity (ppt), March 1975 32 



32. Cruise 60, surface temperature (°C), July 1975 33 



33. Cruise 60, bottom temperature (°C), July 1975 34 



34. Cruise 60, surface salinity (ppt), July 1975 35 



35. Cruise 60, bottom salinity (ppt), July 1975 36 



36. Cruise 62, surface temperature (°C), November 1975 37 



37. Cruise 62, bottom temperature (°C), November 1975 38 



38. Cruise 62, surface salinity (ppt), November 1975 39 



iii 



