Swimming behavior of Dungeness crab,Cancer magister Dana, megalopae in still and moving water
Tóm tắt
In the Grays Harbor estuary, juvenile Dungeness crab (Cancer magister Dana) are found at higher densities in epibenthic shell deposits compared to open mud flat. Differences in predation rate between habitats have been suggested to be due to habitat preference and differential survival. Megalopae preferred shell over open space in still-water conditions. However, it is not known whether megalopae are able to select shell in flowing water since larval preference is known to differ between still and flowing water. Here we report the first experimental study of swimming behavior of Dungeness crab megalopae in a range of current velocities (0–40 cm s−1) equivalent to natural flow in Grays Harbor estuary. Experiments were conducted in daylight using a recirculating flume. Megalopae swimming speeds ranged from 8.5 cm s−1 (8 body lengths s−1) in still water to 44.8 cm s−1 (44 body lengths s−1) at flow speeds of 40 cm s−1, Neither swimming behavior nor sheltering behavior in shells showed any flow-related pattern. Megalopae spent a large proportion of time swimming against the current and made headway upstream against all current velocities tested. The results suggest that Dungeness crab megalopae are able to maneuver and actively search for settlement sites under current velocities found in natural habitats, including intertidal shell deposits, and support the hypothesis of active selection of shell by megalopae.
Tài liệu tham khảo
Armstrong, D. A., O. O. Iribarne, P. A. Dinnel, K. A. McGraw, A. Shaffer, R. Palacios, M. Fernandez, K. Feldman, andG. Williams. 1992. Mitigation of Dungeness crab,Cancer magister, losses due to dredging by development of intertidal shell habitat: Pilot study during 1991. FRI-UW-9205, University of Washington, Seattle, Washington.
Armstrong, D. A., K. A. McGraw, P. A. Dinnel, R. M. Thom, andO. O. Iribarne. 1991. Construction dredging impacts on Dungeness crab,Cancer magister, in Grays Habor, Washington and mitigation of losses by development of intertidal shell habitat. FRI-UW-9110, University of Washington, Seattle, Washington.
Botero, L. andJ. Atema. 1982. Behavior and substrata selection during larval settling in the lobsterHomarus americanus.Journal of Crustacean Biology 21:59–69.
Butman, C. A. 1986. Larval settlement of soft-sediment invertebrates: Some predictions based on an analysis of near-bottom velocity profiles, p. 487–513.In J. C. J. Nihoul (ed.), Marine Interfaces Ecohydrodynamics. Elsevier, New York.
Butman, C. A., J. P. Grassle, andC. M. Webb. 1988. Substrata choices made by marine larvae in still water and in a flume flow.Nature 333:771–773.
Calinski, M. D. andW. G. Lyons. 1983. Swimming behavior of the puerulus of the spiny lobster,Panulirus argus (Latreille, 1804) (Crustacea: Palinuridae).Journal of Crustacean Biology 3:329–335.
Castro, P.. 1978. Settlement and habitat selection in the larvae ofEchinoecus pentagonus (A. Milne Edwards), a brachyuran crab symbiotic with sea urchins.Journal of Experimental Marine Biology and Ecology 34:259–270.
Chia, F. S., J. Buckland-Nicks, andC. M. Young. 1984. Locomotion in marine invertebrate larvae: A review.Canadian Journal of Zoology 62:1205–1222.
Cobb, J. S., D. Wang, D. B. Campbell, andP. Rooney. 1989. Speed and direction of swimming of postlarvae of the American lobster.Transactions of the American Fisheries Society 118:82–86.
DeBrosse, G., S. Sulkin, andG. Jamieson. 1990. Intraspecific morphological variability in megalopae of three sympatric species of the genusCancer (Brachyura: Cancridae).Journal of Crustacean Biology 10:315–329.
Dinnel, P. A., D. A. Armstrong, andR. O. McMillan. 1986. Dungeness crab,Cancer magister, distribution, recruitment, growth, and habitat use in Lummi Bay, Washington. FRI-UW-8612, University of Washington, Seattle, Washington.
Dumbauld, G. R., D. A. Armstrong, andT. L. McDonald. 1993. Use of intertidal oyster shell as habitat enhancement to mitigate loss of subtidal juvenile Dungeness crab (Cancer magister) caused by dredging.Canadian Journal of Fisheries and Aquatic Science 50:381–390.
Eckman, J. E. 1983. Hydrodynamic processes affecting benthic recruitment.Limnology and Oceanography 28:241–257.
Eckman, J. E. 1987. The role of hydrodynamics in recruitment, growth, and survival ofArgopecten irradians (L.) andAnomia simplex (D’Orbigny) within eelgrass meadows.Journal of Experimental Marine Biology and Ecology 106:165–191.
Fernandez, M., O. O. Iribarne, andD. A. Armstrong. 1993. Habitat selection by young of the year Dungeness crab,Cancer magister, and predation risk in intertidal habitats.Marine Ecology Progress Series 92:171–177.
Hatfield, S. E. 1983. Intermolt staging and distribution of Dungeness crab,Cancer magister, megalopae, p. 85–96.In P. W. Wild and R. N. Tasto (eds.), Life history, environment, and mariculture studies of the Dungeness crab,Cancer magister, with emphasis on the central California fishery resource.Fisheries Bulletin 172.
Herrenkind, W. F. andM. J. Butler. 1986. Factors regulating postlarval settlment and juvenile microhabitat use by spiny lobsters,Panulirus argus.Marine Ecology Progress Series 34:23–30.
Jacoby, Ch. A. 1982. Behavioral responses of the larvae ofCancer magister Data (1852) to light, pressure, and gravity.Marine Behavior and Physiology 8:267–283.
Jamieson, G. andA. Phillips. 1988. Occurrence of Cancer crab (C. magister andC. oregonensis) megalopae off the west coast of Vancouver Island, British Columbia.Fishery Bulletin 86:525–542.
Jamieson, G., A. Phillips, and W. Huggett. 1989. Effects of ocean variability on the abundance of Dungeness crab (Cancer magister) megalopae, p. 305–325.In R. J. Beannish and G. A. McFarlane (eds.), Effects of Ocean Variability on Recruitment and an Evaluation of Parameters Used in Stock Assessment Models. Special Publication of Canadian Fisheries and Aquatic Sciences 108.
Luckenbach, M. W. andR. J. Orth. 1992. Swimming velocities and behavior of blue crab (Callinectes sapidus Rathbun) megalopac in still and flowing water.Estuaries 15:186–192.
McConnaughey, R. A. 1991. Factors affecting Dungeness crab (Cancer magister) year-class strength along the Washington coast. Ph.D. Dissertation, University of Washington, Seattle.
McMillan, R. O. 1991. Abundance, growth and habitat use by juvenile Dungeness crab,Cancer magister, in inland waters of Northern Puget Sound, Washington. MS Thesis. University of Washington, Seattle.
Miller, D. C. 1984. Mechanical post-capture particle selection by suspension- and deposit-feedingCorophium.Journal of Experimental Marine Biology and Ecology 82:59–76.
Nowell, A. R. andP. A. Jumars. 1984. Flow environments of aquatic benthos.Annual Review in Ecology and Systematics 15:303–328.
Nowell, A. R. andP. A. Jumars. 1987. Flumes: Theoretical and experimental considerations for simulation of benthic environments.Oceanography and Marine Biology Annual Review 25:91–112.
Pawlik, J. R., C. A. Butman, andV. R. Starczak. 1991. Hydrodynamic facilitation of gregarious settlement of a reef-building tube worm.Science 251:421–424.
Phillips, B. F. andL. Olsen. 1975. Swimming behavior of the puerulus larvae of the Western rock lobster.Australian Journal of Marine and Freshwater Research 26:415–417.
Reilly, P. N. 1983. Predation on Dungeness crab,Cancer magister, in central California, p. 155–164.In P. W. Wild and R. N. Tasto (eds.), Life History, Environment, and Mariculture Studies of the Dungeness Crab,Cancer magister, With Emphasis on the Central California Fishery Resource.Fisheries Bulletin 172.
Wright, L. D., R. A. Gammisch, andR. J. Byrne. 1990. Hydraulic roughness and mobility of three oyster-bed artificial substrata material.Journal of Coastal Research 6:868–878.