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JOHN L. ROBERTS 



Department of Zoology 

 University of Massachusetts 

 Amherst, MA 01003 



Department of Zoology 

 San Diego State University 

 San Diego, CA 92182 



JEFFREY B. Graham 



THERMAL BEHAVIORAL RESPONSES OF 



THE SPECKLED SANDDAB, 



CITHARICHTHYS STIGMAEUS: 



LABORATORY AND FIELD INVESTIGATIONS 



The speckled sanddab, Citharichthys stigmaeus, is 

 a small bothid flatfish that is common in southern 

 CaliforniaiFord 1965; Stephens etal. 1974). These 

 authors and Helly' have suggested that tempera- 

 ture may have a significant effect on localized 

 population abundances and distributions of speck- 

 led sanddabs. No studies to date, however, have 

 examined in detail the relationship between 

 temperature and fish behavior and distribution. 

 We designed this work to study the speckled 

 sanddab population in King Harbor, Redondo 

 Beach, Calif. This harbor (Figure 1), which re- 

 ceives the thermal effluent from an electricity 

 generating station as well as cold upwelled water 

 from the adjacent Redondo Submarine Canyon, 

 contains a highly diversified thermal environ- 

 ment (Stephens 1972). 



'Helly, J. J., Jr. 1974. The effects of temperature and tem- 

 perature selection on the seasonality of the bothid flatfish, 

 Citharichthys stigmaeus. Honors Thesis, Occidental Coll., 

 Los Ang., 34 p. 



FKSHERY BULLETIN: VOL. 76. NO 4. 1979. 



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