798 



Fishery Bulletin 97(4), 1999 



124°30' 124°20' 124°10' 124° 



41''10' 



40°50' 



40°40' 



40°30' 



41°10' 



40°50' 



40°40' 



40°30' 



124°30' 



124°20' 124=10' 



S 10 nautical miles 



10 



IS 20 kilometers 



Figure 11 



Total area trawled within each reporting block as a 

 percentage of the total block area. Area trawled was 

 calculated from the product of mean annual fishing 

 effort 1 1990-94 1 from logbook data, typical vessel speed 

 (5.5 km/h), and a typical trawl door to trawl door width 

 of 85 m. "No trawl" areas within 5.6 km (3 nmii of 

 shore are not included in the total area calculations. 



innumerable questions on the current status of the 

 fishery. Don Pearson of the NMFS Tiburon Labora- 

 tory was extremely helpful in providing California 

 Department of Fish and Game commercial trawl log- 

 book data for the Eureka region. Tone Nichols, formerly 

 of the Pacific Fisheries Environmental Laboratory, as- 

 sisted with earlier versions of several of the figures. 

 This paper benefited greatly from comments provided 

 by Paul Dayton. Ed DeMartini, Mary Yoklavich, Mark 

 Zimmerman, and three anonymous reviewers. 



Acknowledgements 



This work was performed while the senior author 

 held a National Research Council (NOAA/NMFS/ 

 Pacific Fisheries Environmental Laboratory) Re- 

 search Associateship. The Office of Naval Research 

 (ONR Grant N00014-97-F0022 to M. E. Field) spon- 

 sored the sidescan-sonar surveys conducted off Eu- 

 reka during the STRATAFORM program. Larry 

 Quirollo of the California Department of Fish and 

 Game provided a great deal of insight into the his- 

 tory of the Eureka trawl fishery as well as answered 



Literature cited 



Able, K. W., D. C. Twitchell, C. G. Grimes, and R. S. Jones. 



1987. Sidescan sonar as a tool for detection of demersal fish 

 habitats. Fish. Bull. 85:725-744. 

 Alexander, C. R., and A. M. Simoneau. 



1999. Spatial variability in sedimentary processes on the 

 Eel continental slope. Mar. Geology 154:243-254. 

 Auster, P. J., and R. W. Langton. 



1999. The effects of fishing on fish habitat. In L.R. 

 Benaka, (ed. I, Fish habitats: essential fish habitat and re- 

 habilitation, p. 150-187. Am. Fish. Soc. Symp. 22, 

 Bethesda, MD. 



