CONTENTS 



Page 



Introduction 1 



Review of menhaden tagging 1 



Methods of handling experimental fish and recovering tags 2 



Experimental tagging 3 



Experimental tag recovery 10 



Conclusions 10 



Literature cited 11 



Figures 



No. Page 



1. Adult tag about to be inserted with the tagging gun into the body 

 cavity of a yearling menhaden 2 



2. Tag recovery locations in a typical menhaden reduction plant 3 



3. Rotating grate and two 2-pole magnets installed in a transfer chute 



of a menhaden reduction plant 3 



4. Juvenile tag being inserted with the modified tagging gun in the 

 pectoral position. The tag is injected posteriorly from the origin of the 

 left pectoral fin 9 



Tables 



No. Page 



1. Experiment 1; effects of an antibiotic and a disinfectant on the 

 mortality and shedding in groups of 50 adult fish 4 



2. Experiment 2; effects of tagging location and direction of insertion 



on the mortality and shedding in groups of 50 adult fish 4 



3. Experiment 3; effects on the mortality and shedding of tagging with 

 scalpel and forceps, tagging gun, and tagging gun and forceps in 

 groups of 50 adult fish 5 



4. Experiment 4; effects of tag coatings on the mortality and shedding 

 from adult fish 5 



5. Experiment 5; effects of tag coatings and different taggers on the 

 mortality and shedding in groups of 20 adult fish 6 



in 



