Table 5. 



-Combined return of tags from undersize and legal-size king crab that escaped 

 from each 1974 experiment during various soak intervals. 



Table 6.— Combined return of tags from undersize and legal-size king crab that escaped from each 1975 experi- 

 ment during various soak intervals. 



Standard pots 



Pyramid pots 



Free release No bait Herring baited pot Baited pot (dead crab) Radical design Typical design 



Days 

 soaked 



!Z 3 



Z P z 



o *- 



Z « Z 3 



365 128 35— — — — — — — — — ______ 



1 _ _ _ 49 12 24 37 11 30 43 11 26 87 35 40 20 12 60 



2 _ _ _ 75 25 33 _ _ _ — — — 50 20 40 36 7 19 



3 ___ 56 14 25 48 16 33 — — — 38 16 42 36 9 25 



4 _ _ _ 64 15 23 _ _ — 75 26 35 48 18 38 48 14 29 

 7 _ _ _ 103 30 29 88 34 39 70 20 29 — — ——— — 



10 _ _ _ 67 20 30 _ _ _ — _ _ _ _ _ 39 10 26 



15 ___57 22 39— — — — — — ______ 



16 _ _ _ ^ _28_ 21 ^ — _-^ --_ — _-^ _80 _23 _29 _58 ^1 ?f 



Total 605 166 173 61 188 57 303 112 237 66 



Average 



27.4 



35.3 



30.3 



37.0 



27.8 



king crab enter derelict jwts and, until this is deter- 

 mined, the impact of lost pwts upon the Alaska king crab 

 population is uncertain. 



ACKNOWLEDGMENTS 



Guy Powell, and Rod Kaiser, Alaska Department of 

 Fish and Game, Kodiak, were instrumental in the suc- 

 cess of these experiments by reviewing experimental 

 plans. Powell supervised the recovery of our crab tags. 

 Ray Spagnola, master of the chartered crab vessel Tam- 

 my, and his crew contributed substantially to the field 

 operations. Robert Loghry and Craig Forrest, Biological 

 Technicians with the National Marine Fisheries Service, 

 Auke Bay, Alaska, participated in all of the field studies. 

 Rene Cerda, visiting scientist from the University of 

 Valparaiso, Chile, participated during 1975. 



LITERATURE CITED 



HANCOCK, D. A. 



1974. Attraction and avoidance in marine invertebrates — their 

 possible role in developing an artificial bait. J. Cons. 35:328-331. 

 HIPKINS, F. W. 



1974. A trapping system for harvesting sablefish. U.S. Dep. Com- 

 mer., NOAA, Natl. Mar. Fish. Serv., Fish. FacU-7, 20 p. 

 POWELL. G. C. 



1964. Fishing mortality and movements of adult male king crabs, 

 Paralithodes camtschatica (Tilesius), released seaward from 

 Kodiak Island. Alaska. Trans. Am. Fish. Soc. 93:295-300. 

 REARDEN, J. 



1976. Alaska's king crab fishery. Alaska 42(3):4-6, 71-72, 74-76. 

 SOKAL, R. R., and F. J. Rohlf 



1969. Biometry. W. H. Freeman and Co., San Francisco, Calif., 

 776 p. 

 STEVENS, W. L. 



1951. Asymptotic regression. Biometrics 7:247-267. 



11 



