FISHERY BULLETIN: VOL. 77, NO. 4 



than those above Pt. Conception; perhaps here 

 fish can remain on the reefs despite winter 

 storms. Miller and Geibel (1973) noted a sharp 

 winter decrease in S. mystinus numbers on a reef 

 in Monterey Bay. Yet despite extensive tagging 

 at this site and intensive sampling and underwa- 

 ter observation of surrounding reefs during 

 winter, no tagged individuals were found at other 

 reefs (Miller and Houk see footnote 8). Factors 

 other than turbulence may account for a winter 

 exodus. Some rockfish species may leave inshore 

 reefs to spawn. If fish do leave the reef, the extent 

 of their movement is, in general, not known. 

 Moulton (1977) found that during winter rockfish 

 on Puget Sound reefs retreated only short dis- 

 tances, into slightly deeper water. 



The between site difference in mean fish length 

 found between Naples Reef and Haskels probably 

 reflects a difference in fishing pressure. The more 

 heavily fished site averaged smaller fish and 

 fewer mature ones because larger fish were selec- 

 tively angled, or have been subjected to fishing 

 effort for a longer period and are thus more likely 

 to be caught. 



As heavily fished sites contain primarily pre- 

 reproductive individuals (as, in general, does 

 Naples Reef), reproduction of mature fish at 

 lightly fished sites could account for much of the 

 recruitment for all areas. 



Based on data from mechanical and parasite 

 tags, olive rockfish off Santa Barbara exhibit very 

 restricted movements on shallow water reefs, but 

 may be somewhat more mobile around deeper 

 water oil platforms. The species' parochialism in 

 shallow water makes it susceptible to overexploi- 

 tation as interchange of individuals from other 

 reefs is rare. 



ACKNOWLEDGMENTS 



I thank Alfred W. Ebeling, Alice Alldredge, 

 Bruce Robison, and Elmer Noble for critically 

 reading the manuscript and their suggestions. 

 Norm Lammer provided technical help with boat- 

 ing operations. Fred Benko of Sea Landing 

 Sportfishing graciously allowed me space on par- 

 tyboats for sampling. I particularly thank par- 

 tyboat operators Chet Phelps, Irv Grisbeck, Frank 

 Hampton, George Kelly, and Dick Clift for making 

 sampling possible and pleasurable. 



Dave Laur, Lew Haldorson, Tony Hampton, 

 Merritt McCrea, Ken Du Mong, and Dennis Evans 

 assisted in specimen collections, and three 



anonymous reviewers made helpful suggestions. I 

 thank my wife, Regina Paull-Love, for typing the 

 manuscript and for her support and assistance, 

 and Sara Warschaw and Jessica Schulz for typing 

 successive drafts. 



This work was sponsored by NOAA, Office of 

 Sea Grant, U.S. Department of Commerce, under 

 grant no. 04-7-158-44121 (Project r/f-39) and NSF 

 Grant OCE 76-23301. 



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982 



