APPENDIX 



Table A. -- Condition of pins and opercula following tagging 

 Nickel Pins 



1/ 



Pin Condition 



Operculum Condition Remarks 



82 



43 



59 



31 



57 



57 



58 



58 



No corrosion 



Minor surface corrosion at 



operculum. 



Minor surface corrosion at 



operculum. 



Minor surface corrosion at 



operculum. 



Moderate surface corrosion 



at operculum. 



Moderate surface corrosion 



at operculum. 



Hollowed at operculum. 



Lost in tank. 

 Extensive surface corro- 

 sion at operculum. Abraded 

 by inner disc. 

 Moderate surface corro- 

 sion at operculum. Abraded 

 by outer disc. 

 Extensive surface corro- 

 sion at operculum. 



Moderate surface corro- 

 sion at operculum. 



Moderate surface corro- 

 sion at operculum. Pin 

 pitted near head on shank. 



Good 

 Good 



Good 



Good 



Ulcerated, both 

 sides. 



Good 



Minor sore, both 

 sides. 



Minor ulceration 

 externally. Inner 

 disc grown over. 

 Moderate ulceration 

 externally. Inner 

 disc grown over. 

 Severe ulceration 

 externally. Inner 

 disc grown over. 

 Severe ulceration 

 externally. Moderate 

 ulceration internally. 

 Moderate ulceration 

 both sides. 



Black granular tissue 

 around pin. 



Black granular tissue 

 around pin. 



Black granular tissue 

 around pin. 



Black granular tissue 

 around pin. 



Tight tag, dropped off 

 operculum. 



Black granular tissue 

 around pin. 



Loose tag. 



Loose tag. 



Dead in tank several 



days. 



Part of tag broken 



off. 



— / Days on fish refers to elapsed time between the day the fish was tagged and the day it died. 



