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Dr. Bradley G. Stevens

Address: University of Maryland Eastern Shore, Living Marine Resources Cooperative Science Center, Carver Hall, Dept. of Natural Sciences, Princess Anne, MD  21853

Email:  bgstevens@umes.edu

Education
University of Washington, Ph.D. 1982 (Fisheries)
College of Charleston, SC, M.S.  1977 (Marine Biology)
University of Cincinnati, OH, B.S. 1973 (Biology)

Positions Held
Professor of Environmental Science & Distinguished Research Scientist,
Living Marine Resources Cooperative Science Center, University of Maryland Eastern Shore 2009-Present
Associate Professor, SMAST, University of Massachusetts, Dartmouth,  2006-2009
Affiliate Professor, Univ. of Alaska Fairbanks, 2001-2008
Adjunct Professor, Univ. of Alaska Anchorage, 1989-2006
Visiting Faculty, Tokyo Science University, Japan, Jan.-Dec. 1996
Research Fishery Biologist, NMFS/NOAA, Kodiak Laboratory, 1984-2006
Research Assistant Professor, Old Dominion University, 1983-1984

Major Research Interests
1) Invertebrate Fisheries:  Reproductive biology of crustaceans and mollusks; growth, feeding behavior, early life history, settlement behavior and habitat selection of postlarvae.  Cultivation and enhancement of crustaceans, especially crabs.  Effects of climate change on reproduction and recruitment.
2) In-situ Technology: Use of submersibles, ROV's, and sonar to study behavioral ecology. 
3) Fishing Impacts: Bycatch, discard mortality, and impacts of derelict fishing gear. 
4) Deep Sea Research: I have led two cruises with the submersible Alvin to study ecology of Gulf of Alaska Seamounts, in 1999 and 2002.  I have designed and built five video camera sleds for undersea research. 

Recent Projects and other Experience
Editorial Board Member, Journal of Shellfish Research (2008-present)
Hosted a session on Crustacean Management at the National Shellfisheries Association 2009 Meeting.
Convened and edited The Alaska Crab Stock Enhancement Workshop, Kodiak, AK, March 2006
Completed 4-month assignment to the NOAA Undersea Research Program (2003).
Chief Scientist for Gulf of Alaska Seamount Exploration (GOASEX) project, funded by NOAA Office of Ocean Exploration, using DSV Alvin, July 1999 and 2002.
Have designed and built 5 video camera sleds; BRAD-5 (Benthic Resource Assessment Device).
Have made >60 submersible dives including Delta, Alvin, Pisces IV.
In 2003 I discovered the oldest known ship wreck site in Alaska (1860), and the only known wreck from the Russian Colonial Period (1860), and assisted its archaeological survey.

Recent Grants
Improving conservation of New England whelks (2009) Saltonstall-Kennedy (NOAA), $220,000
Surveying the population structure of Nantucket Bay Scallops (UMass, $9495)
Settlement behavior and habitat selection for blue king crab (2005); NPRB $172,000
Development of cultivation techniques for blue king crab (2003); NPRB, $85,962
Ecology of deep-sea crabs on Gulf of Alaska Seamounts (2002); NOAA OE (undisclosed)
Timing of aggregation and hatching for Tanner crab (2001); NURP $182,000

Selected Publications
Stevens, B. G. In press.  Effects of epizootic shell disease on American lobsters, Homarus americanus. Diseases of Aquatic Organisms 0:1-10.

Stevens, B. G. 2009. Hardening of red king crab shells after molting. Crustacean Biology 29:157-160.

Tapella, F., M. C. Romero, B. G. Stevens, and L. Buck. 2009. Substrate preferences and redistribution of blue king crab Paralithodes platypus glaucothoe and first crab on natural substrates in the laboratory. Journal of Experimental Marine Biology and Ecology 372:31-35.

Stevens, B. G., K. M. Swiney, and C. L. Buck. 2008. Thermal effects on embryo development and hatching for blue king crab Paralithodes platypus held in the laboratory, and a method for predicting dates of hatching. Journal of Shellfish Research 27:1-10.

Stevens, B. G., S. Persselin and J. Matweyou. 2008. Survival of blue king crab larvae, Paralithodes platypus, in cultivation: Effects of diet, temperature, and density. Aquaculture Research 39: 390-397.

Stevens, B. G. and K. M. Swiney. 2006. Growth of female red king crabs Paralithodes camtshaticus during pubertal, primiparous, and multiparous molts. Alaska Fisheries Research Bulletin 12(2): 263-270.

Stevens, B. G., and K. Swiney. 2007. Hatch timing, incubation period, and reproductive cycle for primiparous and multiparous red king crab Paralithodes camtschaticus. J. Crust. Biol. 27:37-48.

Stevens, B. G. 2006. Timing and duration of larval hatching for blue king crab Paralithodes platypus, held in the laboratory. J. Crust. Biol. 26(4):495-502.

Stevens, B. G. 2006. Embryonic development and morphometry in the blue king crab, Paralithodes platypus, studied by image and cluster analysis. J. Shellfish Res. 25(2):569-576.

Stevens, B. G., and K. M. Swiney. 2005. Post-settlement effects of habitat type and predator size on cannibalism of glaucothoe and juveniles of red king crab Paralithodes camtschaticus. J. Exp. Mar. Biol. Ecol. 321:1-11.

Stevens, B. G., J. E. Munk, and P. E. Cummiskey. 2004. Utilization of log piling structures as artificial habitats for red king crabs, Paralithodes camtschaticus. J. Shellfish Res. 23:221-226.

Stevens, B. G. 2003. Settlement, substrate preference, and survival of red king crab Paralithodes camtschaticus (Tilesius, 1815) glaucothoe on natural substrata in the laboratory. J. Exp. Mar. Biol. Ecol. 283:63-78.

Stevens, B. G. 2003. Timing of aggregation and larval release by Tanner crabs, Chionoecetes bairdi, in relation to tidal current patterns. Fisheries Research. 65:201-216.

Loher, T., Armstrong, D.A.., and B.G. Stevens. Growth of juvenile red king crab (Paralithodes camtschaticus) in Bristol Bay (Alaska) elucidated from field sampling and analysis of trawl survey data. Fishery Bulletin. 99: 572-599.

Stevens, B. G., I. Vining, S. Byersdorfer, and W. E. Donaldson. 2000. Ghost fishing by Tanner crab (Chionoecetes bairdi) pots off Kodiak, Alaska: pot density and catch per trap as determined from sidescan sonar and pot recovery data. Fish. Bull. 98:389-399.

Stevens, B. G., and J. Kittaka. 1998. Postlarval settling behavior, substrate preference, and time to metamorphosis for red king crab Paralithodes camtschaticus. Mar. Ecol. Prog. Ser. 167:197-206.

Stevens, B. G., J. A. Haaga, and W. E. Donaldson. 1994. Aggregative mating of Tanner crabs Chionoecetes bairdi. Can. J. Fish. Aquat. Sci. 51:1273-1280.

Stevens, B. G., W. E. Donaldson, J. A. Haaga, and J. E. Munk. 1993. Morphometry and maturity of male Tanner crabs, Chionoecetes bairdi, grasping pubescent and multiparous females in shallow and deepwater environments. Can. J. Fish. Aquat. Sci. 50:1504-1516.

Stevens, B. G. 1990. Survival of king and Tanner crabs captured by commercial sole trawls. Fish. Bull. 88:731-744.

Stevens, B. G. 1990. Temperature-dependent growth of juvenile red king crab, Paralithodes camtschatica, and its effects on size-at-age and subsequent recruitment in the eastern Bering Sea. Can. J. Fish. Aquat. Sci. 47:1307-1317.

 

CREST | REU | PSM | GEOScience
NOAA LMRCSC
Carver Hall
University of Maryland Eastern Shore
Princess Anne, MD 21853
410-651-6023

The Living Marine Resources Cooperative Science Center is supported by the 
National Oceanic and Atmospheric Administration (NOAA)
 Award number: NA11SEC4810002