400 
Fishery Bulletin 109(4) 
Acknowledgments 
We thank Coastal Carolina University and the George- 
town County Environmental Protection Society for pro- 
viding us with the RV Brooks McIntyre. Additionally, 
we acknowledge the National Science Foundation GK-12 
Grant, Professional Association of Diving Instructors 
Foundation, and the Slocum-Lunz Foundation for provid- 
ing us with additional funds. We also thank S. Gilman 
and K. Walters for their insightful comments on the 
manuscript. Lastly, we thank N. Simuro, M. K. Maxwell, 
M. Evans, R. Kercher, S. Pratt, B. Fishman, S. George, 
D. Young, C. Smith, J. Hord, J. Stevens, and many other 
volunteers who assisted us. 
Literature cited 
Anderson, E. D. 
1990. Estimates of large shark catches in the Western 
Atlantic and Gulf of Mexico, 1960-1986. NOAA Tech. 
Rep. NMFS 90, 518 p. 
Baum, J. K., and R. A. Myers. 
2004. Shifting baselines and the decline of pelagic sharks 
in the Gulf of Mexico. Ecol. Lett. 7:135-145. 
Bonfil, R. 
1994. Overview of world elasmobranch fisheries. FAO 
Fish. Tech. Paper No. 341, 119 p. FAO, Rome. 
Brill, R., P. Bushnell, L. Smith, C. Speaks, R. Sundaram, E. 
Stroud, and J. Wang. 
2009. The repulsive and feeding deterrent effects of elec- 
tropositive metals on juvenile sandbar sharks ( Carcha - 
rhinus plumbeus). Fish. Bull. 107:298-307. 
Conrath, C. L., J. Gelsleichter, and J. A. Musick. 
2002. Age and growth of the smooth dogfish ( Mustelus 
canis) in the northwest Atlantic Ocean. Fish. Bull. 
100:674-682. 
Dame, R. F., T. Chrzanowski, K. Bildstein, B. Kjerfve, H. Mckel- 
lar, D. Nelson, J. Spurrier, S. Stancyk, H. Stevenson, J. Vern- 
berg, and R. Zingmark. 
1986. The outwelling hypothesis and North Inlet, South 
Carolina. Mar. Ecol. Prog. Ser. 33:217-229. 
Givois, V., and G. S. Pollack. 
2000. Sensory habituation of auditory receptor neu- 
rons: implications for sound localization. J. Exp. Biol. 
203:2529-2537. 
Guttridge T. L„ S. H. Gruber, K. S. Gledhill, D. P. Croft, D. W. 
Sims, and J. Krause. 
2009. Social preferences in juvenile lemon sharks, 
Negaprion brevirostris. Anim. Behav. 78:543—548. 
Hammock, M. F., J. A. Musick, and J. A. Colvocoresses. 
1985. Life history of spiny dogfish off the northeastern 
United States. T. Am. Fish. Soc. 114:367-376. 
Jordan, L. K. 
2008. Comparative morphology of stingray lateral 
line canal and electrosensory systems. J. Morphol. 
269:1325-1339. 
Jordan, L. K., S. M. Kajiura, and M. S. Gordon. 
2009. Functional consequences of structural differences 
in stingray sensory systems. Part II: electrosensory 
system. J. Exp. Biol. 212:3044-3050. 
Kaimmer, S., and A. W. Stoner. 
2008. Field investigation of rare-earth metal as a deter- 
rent to spiny dogfish in the Pacific halibut fishery. Fish. 
Res. 94:43-47. 
Kalmijn, A. J. 
1982. Electric and magnetic field detection in elasmo- 
branch fishes. Science 218:916-918. 
Killam, K. A., and G. R. Parsons. 
1989. Age and growth of the blacktip shark, Carcharhi- 
nus limbatus, near Tampa Bay, Florida. Fish. Bull. 
87:845-857. 
Klimley, A. P., S. C. Beavers, T. H. Curtis, and S. J. Jorgensen. 
2002. Movements and swimming behavior of three spe- 
cies of sharks in La Jolla Canyon, California. Environ. 
Biol. Fishes 63:117-135. 
Major, P. F. 
1978. Predator prey interactions in two schooling fishes, 
Caranx ignobilis and Stolephorus purpureus. Anim. 
Behav. 26:760-777. 
McKinnell, S., and M. P. Seki. 
1998. Shark bycatch in the Japanese high seas squid 
driftnet fishery in the North Pacific Ocean. Fish. Res. 
39:127-138. 
Megalofonou, P., C. Yannopoulos, D. Damalas, G. De Metrio, 
M. Deflorio, and J. M. de la Serna. 
2005. Incidental catch and estimated discards of pelagic 
sharks from the swordfish and tuna fisheries in the 
Mediterranean Sea. Fish. Bull. 103:620-634. 
Murray, R. W. 
1962. The response of the ampullae of Lorenzini of 
elasmobranchs to electrical stimulation. J. Exp. Biol. 
39:119-128. 
Musick, J. A., S. Branstetter, and J. A. Colvocoresses. 
1993. Trends in shark abundance from 1974 to 1991 for 
the Chesapeake Bight region of the U.S. mid-Atlantic 
coast. NOAA Tech. Rep. NMFS 115, 18 p. 
Myrberg, A. A., Jr., A. Banner, and J. D. Richard. 
1969. Shark attraction using a video-acoustic 
system. Mar. Biol. 2:264-276. 
Myrberg, A. A., Jr., C. R. Gordon, and A. P. Klimley. 
1978. Rapid withdrawal from a sound source by open-ocean 
sharks. J. Acoust. Soc. Am. 64:1289-1297. 
O’Connell, C. P., D. C. Abel, P. H. Rice, E. M. Stroud, and N. C. 
Simuro. 
2010. Responses of the southern stingray ( Dasyatis 
americana ) and the nurse shark (Ginglymostoma cir- 
ratum) to permanent magnets. Mar. Freshw. Behav. 
Phys. 43:63-73. 
O’Connell, C. P., D. C. Abel, S. H. Gruber, E. M. Stroud, and 
P. H. Rice. 
2011. Response of juvenile lemon sharks, Negaprion 
brevirostris, to a magnetic barrier simulating a beach 
net. Ocean Coast. Manage. 54:225-230. 
Parsons, G. R. 
1985. Growth and age estimation of the Atlantic 
sharpnose shark, Rhizoprionodon terraenovae : a com- 
parison of techniques. Copeia 1985:80-85. 
Patchineelam, S. M., B. Kjerfve, and L. R. Gardner. 
1999. A preliminary sediment budget for the Winyah Bay 
estuary. South Carolina, USA. Mar. Geo. 162:133-144. 
Poisson, F. 
2011. Catch, bycatch of sharks, and incidental catch 
of sea turtles in the reunion-based longline swordfish 
fishery (Southwest Indian Ocean) between 1997 and 
2000, p. 163-165. In Global change: mankind-marine 
environment interactions; proceedings of the 13 th French- 
Japanese oceanography symposium, September 4-8, 
2008, Marseilles and Paris. 
