. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. * S. 3. Overwinter 4. Oviposition Figure 2. Diagram of the proposed conceptual model of the migratory behavior of female blue crabs. The model is divided into two phases, a down-estuary phase (Phase I) and a spawning phase (Phase 11). (1) From late spring to early fall, adult crabs mate in the brackish regions of the estuary (dark crabs represent males; light crabs represent females). (2) Following insemination, female crabs migrate seaward using selective tidal-stream transport (STST) on nocturnal ebb tides. Male crabs rema
. The Biological bulletin. Biology; Zoology; Biology; Marine Biology. * S. 3. Overwinter 4. Oviposition Figure 2. Diagram of the proposed conceptual model of the migratory behavior of female blue crabs. The model is divided into two phases, a down-estuary phase (Phase I) and a spawning phase (Phase 11). (1) From late spring to early fall, adult crabs mate in the brackish regions of the estuary (dark crabs represent males; light crabs represent females). (2) Following insemination, female crabs migrate seaward using selective tidal-stream transport (STST) on nocturnal ebb tides. Male crabs remain in low-salinity areas. (3) After reaching euhaline regions, female crabs cease STST and may overwinter near the mouth of the estuary. (4) Spawning is initiated by the attachment of the egg mass (sponge) to the underside of the abdomen. About 10-12 days following extrusion of the sponge, female crabs with late-stage eggs migrate to the mouth of the estuary and possibly into coastal waters using STST on nocturnal ebb tides. (5) At the entrance to the estuary, larvae are released near the time of high tide at night. Shortly after larval release, female crabs reenter the estuary using STST on flood tides. Since some female crabs are capable of producing more than one brood, steps 4-6 may be repeated several times during a single 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 Richard, 1892-; Redfield, Alfred Clarence, 1890-1983. Woods Hole, Mass. : Marine Biological Laboratory
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Keywords: ., bookauthorlilliefrankrat, booksubjectbiology, booksubjectzoology
