. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CASTRATING TREMATODE OF WHELKS 265. Figure 3. Whelks. Biucinimi unilutiiin. with the shell removed. The gonad (g) is clearly distinct from the digestive gland (dg) in the uninfecied female (A) and male (B) because of different coloration, whereas these organs are less easily distinguished in the infected female (Cl and male (D) because of similar coloration (light grey). Note the strong atrophy of the penis (p) of the infected male (D). ; August: n= 18. t= , P < ). Penis mass was markedly smaller for infec
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. CASTRATING TREMATODE OF WHELKS 265. Figure 3. Whelks. Biucinimi unilutiiin. with the shell removed. The gonad (g) is clearly distinct from the digestive gland (dg) in the uninfecied female (A) and male (B) because of different coloration, whereas these organs are less easily distinguished in the infected female (Cl and male (D) because of similar coloration (light grey). Note the strong atrophy of the penis (p) of the infected male (D). ; August: n= 18. t= , P < ). Penis mass was markedly smaller for infected males (Fig. 7). Neophasis sp. infections in whelks in ilie laboratory Whelks sampled from the laboratory in November 1995. after 12 months in captivity, had larval Neophasis sp. in of females (3/15) and 0% of males (0/15). In one of the three infected females, larval Neophasis sp. had invaded the gills and mucus gland tissues, a condition never ob- served in the whelks collected in May and August 1994 from the field. In January 1996. after 15 months in the laboratory. of females (4/23) and of males (1/22) were infected. The prevalence of Neophasis sp. in the laboratory whelks (dissected in November 1995 and Janu- ary 1996) tended to be greater for females than males, but not significantly so (Fisher exact probability test, P = ). For females, the prevalence in the laboratory was similar to that in the tield sampling (G = , n = 261, P = ), but was lower for males (Fisher exact probability test, P = ). Five whelks died during captivity, and three of. 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 R
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
