. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 314 T. W. CRONIN AND C. A. KING 400 500 600 Wavelength (nm) 700 Figure 6. A comparison of the results of the four techniques. Dark solid line: scan technique. Light solid line: criterion technique. Dotted line: interpolation technique. Dashed line: Ramp technique. Mote, 1982; see also Cronin, 1985; Cronin and Forward, 1988). Most stomatopods also have the 8th cell in all om- matidia (Waterman, 1981; Marshall, 1988), and possess excellent sensitivity to ultraviolet (UV) wavelengths (Schiff, 1963; Cronin, 1989). The p
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 314 T. W. CRONIN AND C. A. KING 400 500 600 Wavelength (nm) 700 Figure 6. A comparison of the results of the four techniques. Dark solid line: scan technique. Light solid line: criterion technique. Dotted line: interpolation technique. Dashed line: Ramp technique. Mote, 1982; see also Cronin, 1985; Cronin and Forward, 1988). Most stomatopods also have the 8th cell in all om- matidia (Waterman, 1981; Marshall, 1988), and possess excellent sensitivity to ultraviolet (UV) wavelengths (Schiff, 1963; Cronin, 1989). The presence of UV recep- tors with sensitivity extending into the spectral range we studied was probably the cause of the large variation of sensitivity we observed at 400 nm. Stomatopods are brightly colored and display their colors prominently in intraspecinc and interspecific communication (Caldwell and Dingle, 1975). In Gono- dactylus oerstedii, colors are known to play a role in terri- torial behavior (Hazlett, 1979). Like many stomatopod species, G. oerstedii inhabits shallow, well-lit water, and is active during the daytime (Dominguez and Reaka, 1988). There is every reason to expect that the ability to recognize hue exists in some stomatopods, particularly in the gonodactyloids. In previous intracellular optical investigations of G. oerstedii, evidence has been found that only one long- wavelength spectral mechanism exists in the peripheral retina (Cronin, 1989). In contrast, the tiering of rhab- doms in four of the rows of the central band would be expected to produce up to four dichromatic, long-wave- length mechanisms there (Marshall, 1988). Forthese rea- sons, we selected the medial peripheral ocular region for this first study. Results clearly suggest a single receptor class that re- sponds identically to all four experimental approaches (Fig. 6). This function peaks near 540 nm, has a half bandwidth of 125 nm. and has the typical form of a spec- tral sensitivity funct
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