. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 194 PHILIP G. MURPHY. FIGURE 1. Map of California and Oregon showing locations of sampling sites. Graph of mean March to June and November to January surface temperatures shows a thermal break at Point Conception and anomalous conditions near Monterey Bay (after Sverdrup, Johnson, and Fleming, 1942, p. 724). other is found higher on intertidal rock surfaces. Giesel (1970) has suggested that phenotypic plasticity alone does not account for these niorphs, but that pre- dation pressure may select them from a continuum of shell
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. 194 PHILIP G. MURPHY. FIGURE 1. Map of California and Oregon showing locations of sampling sites. Graph of mean March to June and November to January surface temperatures shows a thermal break at Point Conception and anomalous conditions near Monterey Bay (after Sverdrup, Johnson, and Fleming, 1942, p. 724). other is found higher on intertidal rock surfaces. Giesel (1970) has suggested that phenotypic plasticity alone does not account for these niorphs, but that pre- dation pressure may select them from a continuum of shell types during each post- larval generation. Therefore, to assure as representative a sample of genotypes as possible, approximately equal numbers of specimens were collected at each site from stalked barnacle beds and from higher zones on the same rocks, except at YAC where the barnacle beds were not sampled. Because it is difficult to identify small limpets to species, only specimens longer than 5 mm were collected. Otherwise, no conscious selection of any size class or shell pattern was made. Limpets were brought alive to the laboratory and then kept at -76° C until electrophoretic Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Marine Biological Laboratory (Woods Hole, Mass. ); Marine Biological Laboratory (Woods Hole, Mass. ). Annual report 1907/08-1952; Lillie, Frank Rattray, 1870-1947; Moore, Carl Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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