Taylor and Hoemg: Effect of tag anchor location on Chionoecetes opilio 



329 



The loglinear model approach we used is quite gen- 

 eral and allows any number of covariates (such as size 

 at the time of tagging) to be properly accounted for. 

 For those who prefer a regression approach to data 

 analysis, the same analyses can be cast as logit models 

 (see Fienberg 1980, chap. 6). 



The laboratory study by Hurley et al. (1990) sug- 

 gested that tag insertion frequently results in exten- 

 sive necrosis of the tissue and carapace around the 

 anchor. This was not seen in the field data. We spec- 

 ulate that the decreased levels of necrosis in the field- 

 tagged animals may be due to the lower water tem- 

 peratures in Conception Bay (-1.2 to -0.5°C in the 

 Bay versus 4-6 °C in the laboratory study). 



Acknowledgments 



We wish to thank P. O'Keefe for assistance in the field 

 and laboratory, D. Collins for drawing the figure, and 

 G.P. Ennis and the anonymous reviewers for helpful 

 comments on the manuscript. 



Citations 



Fienberg, S.E. 



1980 The analysis of cross-classified categorical data, 2d ed. 

 MIT Press, Cambridge. 

 Hurley, G.V., R.W. Elner, D.M. Taylor, and R.F.J. Bailey 

 1990 Evaluation of snow crab tags retainable through molt- 

 ing. In Parker, N.C., et al. (eds.), Fish-marking techniques, 

 p. 84-93. Am. Fish. Soc. Symp. Ser. 7. Am. Fish. Soc, 

 Bethesda, MD. 

 McBride, J. 



1982 Tanner crab tag development and tagging experiments 

 1978-1982. In Proceedings of the international symposium 

 on the genus Chionoecetes, p. 383-403. Lowell Wakefield Fish. 

 Symp. Ser., May 3-6, 1982. Alaska Sea Grant Rep. 82-10, 

 Fairbanks. 

 Restrepo, V.R., and J.M. Hoenig 



1988 Munro's method for estimating intermolt periods of trop- 

 ical decapods is robust. Bull. Mar. Sci. 42:488-492. 

 Taylor, D.M. 



1982 A recent development in tagging studies on snow crab, 

 Chionoecetes opilio, in Newfoundland— Retention of tags 

 through ecdysis. In Proceedings of the international sym- 

 posium on the genus Chionoecetes, 405-417. Lowell Wakefield 

 Fish. Symp. Ser., May 3-6, 1982. Alaska Sea Grant Rep. 

 82-10, Fairbanks. 

 Taylor, D.M., and J.M. Hoenig 



1990 Growth per molt of male snow crab Chionoecetes opilio 

 from Conception and Bonavista Bays, Newfoundland. Fish. 

 Bull., U.S. 88:753-760. 



