. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PEA CRAB DISTRIBUTION AND ABUNDANCE 485 two days prior to the tow a wire box which contained 10 scallops, each with an ovigerous female crab, was placed on the grass bed where the plankton tow was made. This was done to determine whether adult female crabs could survive in this area. They did survive and it is probably their zoeae which were captured in the sample since few zoeae were later found after removing this box of infected scallops. Surface salinity was generally higher near the inlets of Bogue Sound and de- creased
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. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. PEA CRAB DISTRIBUTION AND ABUNDANCE 485 two days prior to the tow a wire box which contained 10 scallops, each with an ovigerous female crab, was placed on the grass bed where the plankton tow was made. This was done to determine whether adult female crabs could survive in this area. They did survive and it is probably their zoeae which were captured in the sample since few zoeae were later found after removing this box of infected scallops. Surface salinity was generally higher near the inlets of Bogue Sound and de- creased toward the center (Fig. 3). Post-larval P. maculatus Inspection of 8120 scallops collected during all months from 1968 to 1971 re- vealed the post-larval life cycle of P. maculatus in Bogue Sound. All stages were more abundant near inlets and absent from center areas of the sound. Pre-swarniing crabs. The first crab instars were found in scallops abundantly in October and November near the inlets (Sites 1, 2, 3, 4, 5, 6, 11, 12, 13) and multiple infections were common. These crabs remained in scallops for several molts and ranged in carapace width from 1 to 6 mm. One hundred fifty-one pre- swarming crabs (60 female, 85 male) were collected. No females in this stage contained sperm in the seminal receptacles. 36 35 34 33 * 32 t 3I | =0 w 29 28 27 26 1 1 1 T. 0 June 1969 • Aug. 1969 * Sept. 1969 a June 1970 J L J L 13 12 10 8 4 3 West SAMPLING SITE East FIGURE 3. Surface salinity at plankton stations.. 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 work.. 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 Biolo