. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 228 Bulletin Museum of Comparative Zoology, Vol. 140, No. 5. Figure 37. Strata map with depth zones corresponding to Figures 34 to 36. another around 180 mm, and has a total size-range of 70 to 230 mm FL. The length- frequency diagram for the spring (Fig. 38) is similar to the one for winter. The curve is bimodal with one peak at around 100 mm and another at around 140 mm, but with many larger individuals. The total size-range is from 70 to 210 mm FL. These data for the winter and spring months indicate that two- and
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. 228 Bulletin Museum of Comparative Zoology, Vol. 140, No. 5. Figure 37. Strata map with depth zones corresponding to Figures 34 to 36. another around 180 mm, and has a total size-range of 70 to 230 mm FL. The length- frequency diagram for the spring (Fig. 38) is similar to the one for winter. The curve is bimodal with one peak at around 100 mm and another at around 140 mm, but with many larger individuals. The total size-range is from 70 to 210 mm FL. These data for the winter and spring months indicate that two- and possibly three-year classes are concentrated in deep water dur- ing these seasons. Thus, there seem to be wide dispersal and independent movement of size-classes in the warmer months, and a concentration of a large part of the popu- lation in deep water in the colder months. The seasonal distribution of Stromateus maculatus (=Stromateus brasiliensis) off the southern Atlantic coast of South America parallels in some respects that just described for P. triacanthus in the western North Atlantic. T. J. Hart (1946) described the main features of the sea- sonal movements of S. maculatus on the Patagonian shelf as follows: a double trend of seasonal movement - inshore in spring and summer with maximum con- centration, offshore in autumn and winter with maximum dispersal; and, a meridional movement southward in summer and north- ward in winter. The latter aspect is similar to that of P. triacanthus, but, unlike the pattern of S. maculatus, maximum dispersal of P. triacanthus seems to occur in summer and autumn with maximum concentration in a restricted region occurring in the winter and early spring. A number of fishes with warm-water af-. 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 o
Size: 1798px × 1389px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
