Yochum et al. A comparison of methods for evaluating mortality of discarded Cancer magister 
139 
approach more closely mimic actual fishing stressors 
and a more natural environment after release, and re¬ 
duce handling (transporting the animals from the fish¬ 
ing vessel to the laboratory and maintaining them in 
tanks). For the Oregon Dungeness crab fisheries, these 
approaches, used together, provided a more comprehen¬ 
sive evaluation of what affects survival of discarded 
crab. In both studies, sample size is highlighted as a 
critical consideration when applying the RAMP ap¬ 
proach to a low-impact fishery. 
Acknowledgments 
We are grateful for the ride-along opportunities pro¬ 
vided by R. Carel, B. Eder, D. Lemon, and A. Pazar, 
and for the assistance provided by the crews of the 
FVs Delma Atm, Maggie, and Timmy Boy. We thank 
J. Ainsworth, K. Buisman, D. Hall, J. Hoenig, P. Iseri, 
K. Jacobson, A. Levings, B. Milano, M. Osterhoudt, D. 
Phillips, M. Vance, and the Oregon Dungeness Crab 
Commission for their contribution to this research. 
Funding for this project was provided by the Mamie 
Markham Research Award and the National Marine 
Fisheries Service Bycatch Reduction Engineering Pro¬ 
gram (award NA12NMF4720249). 
Literature cited 
Barber, J. S., and J. S. Cobb. 
2007. Injury in trapped Dungeness crabs ( Cancer magis¬ 
ter). ICES J. Mar. Sci.64:464-472. 
Barkley, A. S., and S. X. Cadrin. 
2012. Discard mortality estimation of yellowtail flounder 
using reflex action mortality predictors. Trans. Am. 
Fish. Soc. 141:638-644. 
Barrento, S., A. Marques, S. Pedro, P. Vaz-Pires, and M. L. 
Nunes. 
2008. The trade of live crustaceans in Portugal: space for 
technological improvements. ICES J. Mar. Sci. 65:551- 
559. 
Benaka, L. R., L. Sharpe., L. Anderson., K. Brennan, J. E. 
Budrick, C. Lunsford, E. Meredith, M. S. Mohr, and C. 
Villafana. 
2014. Fisheries release mortality: identifying, prioritizing, 
and resolving data gaps. NOAA Tech. Memo. NMFS-F/ 
SPO-142, 55 p. 
Benoit, H. P, T. Hurlbut, and J. Chasse. 
2010. Assessing the factors influencing discard mortality 
of demersal fishes using a semi-quantitative indicator of 
survival potential. Fish. Res. 106:436-447. 
Bergmann, M., and P. G. Moore. 
2001. Survival of decapod crustaceans discarded in the 
Nephrops fishery of the Clyde Sea area, Scotland. ICES 
J. Mar. Sci. 58:163-171. 
Bergmann, M., A. C. Taylor, and P. G. Moore. 
2001. Physiological stress in decapod crustaceans (Mu- 
nida rugosa and Liocarcinus depurator ) discarded in 
the Clyde Nephrops fishery. J. Exp. Mar. Biol. Ecol. 
259:215-229. 
Bower, S. D., A. J. Danylchuk, J. W. Brownscombe, J. D. 
Thiem, and S. J. Cooke. 
2016. Evaluating effects of catch-and-release angling on 
peacock bass {Cichla ocellaris) in a Puerto Rican reser¬ 
voir: a rapid assessment approach. Fish. Res. 175:95- 
102 . 
Brownscombe, J. W., L. Nowell, E. Samson, A. J. Danylchuk, 
and S. J. Cooke. 
2014. Fishing-related stressors inhibit refuge-seeking 
behavior in released subadult great barracuda. Trans. 
Am. Fish. Soc. 143:613-617. 
Brownscombe, J. W., L. P. Griffin, T. Gagne, C. R. Haak, S. J. 
Cooke, and A. J. Danylchuk. 
2015. Physiological stress and reflex impairment of recre- 
ationally angled bonefish in Puerto Rico. Environ. Biol. 
Fish. 98:2287-2295. 
Burton, C. 
2001. Transport of live crustaceans. Shellfish News 
11:18-19. 
Campbell, M. D., J. Tolan, R. Strauss, and S. L. Diamond. 
2010. Relating angling-dependent fish impairment to 
immediate release mortality of red snapper ( Lutjanus 
campechanus). Fish. Res. 106:64-70. 
Danylchuk, A. J., C. D. Suski, J. W. Mandelman, K. J. Mur- 
chie, C. R. Haak, A. M. L. Brooks, and S. J. Cooke. 
2014. Hooking injury, physiological status and short-term 
mortality of juvenile lemon sharks (Negaprion beviros- 
tris) following catch-and-release recreational angling. 
Conserv. Physiol. 2:cot036. 
Davis, M. W. 
2007. Simulated fishing experiments for predicting de¬ 
layed mortality rates using reflex impairment in re¬ 
strained fish. ICES J. Mar. Sci. 64:1535-1542. 
Davis, M. W., and M. L. Ottmar. 
2006. Wounding and reflex impairment may be predictors 
for mortality in discarded or escaped fish. Fish. Res. 
82:1-6. 
Diamond, S. L., and M. D. Campbell. 
2009. Linking “sink or swim” indicators to delayed mor¬ 
tality in red snapper by using a condition index. Mar. 
Coast. Fish. 1:107-120. 
Didier, A. J., Jr. 
2002. The Pacific coast Dungeness crab fishery, 10 p. [Re¬ 
port submitted to the Committee on Commerce, Science, 
and Transportation of the United States Senate and 
Committee on Resources of the United States House of 
Representatives.] Pac. States Mar. Fish. Comm., Glad¬ 
stone, OR. [Available from website.] 
Donaldson, M. R., S. G. Hinch, G. D. Raby, D. A. Patterson, A. 
P. Farrell, and S. J. Cooke. 
2012. Population-specific consequences of fisheries-related 
stressors on adult sockeye salmon. Physiol. Biochem. 
Zool. 85:729-739. 
Durkin, J. T., K. D. Buchanan, and T. H. Blahm. 
1984. Dungeness crab leg loss in the Columbia River es¬ 
tuary. Mar. Fish. Rev. 46(11:22-24. 
Fernandez, M. 
1999. Cannibalism in Dungeness crab Cancer magister: 
effects of predator-prey size ratio, density, and habitat 
type. Mar. Ecol. Prog. Ser. 182:221-230. 
Gallagher, A. J., J. E. Serafy, S. J. Cooke, and N. 
Hammerschlag. 
2014. Physiological stress response, reflex impairment, 
and survival of five sympatric shark species following 
experimental capture and release. Mar. Ecol. Prog. Ser. 
496:207-218. 
