apparently entered the Gulf through the Northeast 
Channel during the spring of 1976. 
ACKNOWLEDGMENTS 
I thank the many biologists and technicians of the 
Northeast Fisheries Center (NEFC), National Marine 
Fisheries Service, Woods Hole, Mass., who collected, 
analyzed, and plotted much of the raw temperature 
data; Joe Chase of the Woods Hole Oceanographic In- 
stitution for providing much of the lightship data; and J. 
B. Colton, M. D. Grosslein, R. Schlitz, and R. Wright of 
the NEFC for reviewing this manuscript. 
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