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Visual pigments in the early life stages of Pacific northwest marine fishes

Lyle L. Britt1,2, Ellis R. Loew3,* and William N. McFarland1,4


1 School of Aquatic and Fishery Sciences, University Washington, Seattle, WA 98195, USA
2 NOAA, NMFS, Alaska Fisheries Science Center, 7600 Sand Point Way NE, Seattle, WA 98115, USA,
3 Department of Biomedical Sciences, Veterinary College, Cornell University, Ithaca, NY 14853, USA and
4 Friday Harbor Laboratories, 620 University Road, Friday Harbor, WA 98250, USA



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  		Fig. 1. Spectral absorbance curves from the four single-cone photoreceptor cell types found in the dwarf wrymouth, Lyconectes aleutensis. Each absorbance curve was normalized to the {lambda}max of the best-fitting template curve (filled circles connected by a solid line). {lambda}max of visual pigments of cones sensitive in the yellow (P570), green (P512), violet (P406) and ultraviolet (P360) regions of the spectrum are indicated (arrows). The noise in each recording is typical of that obtained for all the other species examined.

 


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  		Fig. 2. Frequency distribution for all of the single-cone photoreceptor {lambda}max values sampled from all 22 species. Five classes of single-cone photoreceptors were categorized based upon the observed frequency distribution.

 

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© The Company of Biologists Ltd 2001