Institution of Oceanography, University of Cali- 

 fornia at San Diego, La Jolla). Alec MacCall 

 (California Department of Fish and Game, La 

 Jolla) gave helpful suggestions regarding the 

 interpretation of the results. 



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RICHER, W E. 



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SMITH, R E. 



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john r. hunter 

 Carol a. kimbrell 



Southwest Fisheries Center La Jolla Laboratory 

 National Marine Fisheries Service, NOAA 

 P.O. Box 721 

 La Jolla, CA 92038 



DEPTH DISTRIBUTION AND SEASONAL AND 

 DIEL MOVEMENTS OF RATFISH, 



HYDROLAGUS COLLIEI, IN 

 PUGET SOUND, WASHINGTON' 



The ratfish, Hydrolagus colliei, inhabits the 

 coastal waters of North America from Alaska to 

 the Gulf of California (Hart 1973). One aspect of 

 the biology of this species which has attracted 

 attention is its vision physiology It is generally 

 accepted that most deepwater fish, regardless of 

 phylogenetic position, have retinal pigments with 

 maximum absorption at about 490 nm or less 

 (Munz 1971; Lythgoe 1972). For example, H. 

 affinis, the species of chimaeroid found in deep 

 water of the western Atlantic, has retinal pig- 

 ments with maximum absorbance at 477 nm ( Den- 

 ton and Nicol 1964). In contrast, a shallow-water 

 species of chimaeroid ( Callorhinchus callorhyn- 

 chus) found off Chile has retinal pigments with 



'Contribution No. 514 College of Fisheries, University of 

 Washington, Seattle, Wash. 



816 



FISHERY BULLETIN; VOL. 78, NO. 3, 1980. 



