. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Systematics am) Biology of Peprili s • Horn 225 FREQUENCY , ^^ N= 8825 J. OVER 1000 Figure 34. Summer (July and August) distribution of the butterfish, Peprilus triacanthus, off the northeastern coast of the United States, 1963-o5. Data compiled from R/V ALBATROSS IV groundfish survey cruises of the U. S. Bureau of Com- mercial Fisheries, Woods Hole, Massachusetts. Number of fish per stratum is the cumulative total catch per stratum for the three-year period. Length-frequency is of the total catch calculated from the
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Systematics am) Biology of Peprili s • Horn 225 FREQUENCY , ^^ N= 8825 J. OVER 1000 Figure 34. Summer (July and August) distribution of the butterfish, Peprilus triacanthus, off the northeastern coast of the United States, 1963-o5. Data compiled from R/V ALBATROSS IV groundfish survey cruises of the U. S. Bureau of Com- mercial Fisheries, Woods Hole, Massachusetts. Number of fish per stratum is the cumulative total catch per stratum for the three-year period. Length-frequency is of the total catch calculated from the sample length-frequency; N = total catch of all strata for the three-year period. Strata map courtesy of Marvin D. Grosslein. The greatest numbers of individuals were collected in stratum nine (Fig. 37), in waters of less than 110 m in depth. The species was collected over an area in which the mean bottom temperatures ranged from ° to °C and in waters ranging from 33 to 250 m in depth. The winter distribution (Fig. 36) is different from that of either the summer or the autumn. The winter collections made in the same region and with reason- ably the same fishing effort, indicate that the species has a more restricted horizontal distribution during this season. The dis- tribution is entirely south of the Gulf of Maine and in deep water. No fish were collected in the shallowest strata. The greatest numbers of individuals were cap- tured in stratum seven (Fig. 37), in which the depth range is 112 to 183 m. Con- siderable numbers were collected in deeper water near the edge of the continental shelf. Collections were made over an area in which the mean bottom temperatures ranged from ° to °C. The spring distribution (no map, data for 1968 only) is similar to the winter distri- bution. The greatest numbers of individuals were collected in deep water along the edge of the continental shelf. The fish was. Please note that these images are extracted from scanned page
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Keywords: ., bookauthorharvarduniversity, bookcentury1900, booksubjectzoology
