. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. —I— 18 I iO I 22 Figure 22. Geographic variation in gill raker number in A. affinis. A := Gulf of Guinea; B ^ Caribbean; C ;= Indian Ocean; D = Pacific (Chile); E = Pacific (Cali- fornia); F = NW Atlantic (NW Atlantic pocket). Numbers refer to sample size. concentrations occnning from 170 m to 400 m. With the possible exception of the Gulf of Guinea, there are no indications of marked geographic variation in depth dis- tribution, although Appendix C indicates slightly shallower daytime depths off Cali- fornia than in
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. —I— 18 I iO I 22 Figure 22. Geographic variation in gill raker number in A. affinis. A := Gulf of Guinea; B ^ Caribbean; C ;= Indian Ocean; D = Pacific (Chile); E = Pacific (Cali- fornia); F = NW Atlantic (NW Atlantic pocket). Numbers refer to sample size. concentrations occnning from 170 m to 400 m. With the possible exception of the Gulf of Guinea, there are no indications of marked geographic variation in depth dis- tribution, although Appendix C indicates slightly shallower daytime depths off Cali- fornia than in the tropical Atlantic. Geo<irap]uc variation. Five separate populations could be recognized and are identified and statistically defined in Figures 22 and 23 and Table 2. Regression sample sizes are small in the Atlantic. Figure 23 indicates positional variation in body depth even though there is no sig- nificant difference in slope. Argyropelecus gigas Norman Figure 24 Argyropelecus gigas Norman, 1930: 302 (Iiolo- type BMNH ; Gulf of Guinea; not seen); Jespersen, 1934: 15 (fig.); Fowler, 1936: 1208; Parr, 1937: 49; Maul, 1949a: 17 (fig.); 1949b: 13; Koefoed, 1961: 3; Schultz, 1961: 600 (fig.); 1964: 241 (fig.); Blache, 1964: 71 (fig.); Backus et al, 1965: 129; Bright and Paquegnat, 1969: 28. 3 0 B D 2D. B Q SL Figure 23. Geographic variation in the regression of body depth (BD) on standard length (SL) in A. affinis. A (California); B = Pacific (Chile); C = NW Atlantic; D = Gulf of Guinea; E = Indian Ocean. =: Pacific. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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