7. When tagged anteriorly, juvenile menha- 

 den with distended intestines suffer higher 

 rates of mortality than do those with flaccid 

 intestines. 



8. By most methods of anterior insertion of 

 tags in juveniles, mean length about 

 100 mm, adult and juvenile tags cause about 

 the same total tag loss; however, adult tags 

 cause high rates of tagging mortality, and 

 juvenile tags cause high rates of tag shed- 

 ding. 



9. Juvenile menhaden can be successfully 

 tagged using juvenile tags and the pectoral 

 method, which eliminates the high rate of 

 tag shedding. 



10. Adult and juvenile tags can be efficiently 

 and economically recovered on magnets 

 from dried fish scrap at menhaden process- 

 ing plants. 



LITERATURE CITED 



AASEN, O.. K. P. ANDERSEN, J. GULLAND. K. POPP 

 MADSEX, and D. SAHRHAGE. 



1961. ICES herring tagging experiments in 1957 

 and 1958. Cons. Perm. Int. Explor. Mer, Rapp. 

 P.-V. Reun. 152:1-50. 



BAYLIFF, W. H., and E. F. KLIMA. 



1962. Live-box experiments with anchovetas, 

 Cetengraulix mysticetns in the Gulf of Panama. 

 Inter-Am. Trop. Tuna Coram., Bull. 6:333-446. 



CALIFORNIA DIVISION OF FISH AND GAME. 



1945. Results of tagging experiments in California 

 waters on the sardine (Surdinops caeritlea). Calif. 

 Div. Fish Game, Fish Bull. 61, 90 p. 

 CARLSON. F. T., and J. W. REINTJES. 



1972. Suitability of internal tags for Atlantic men- 

 haden. Fish. Bull.. U.S. 70:514-517. 



DAHLGREN, E. H. 



1936. Further developments in the tagging of the 

 Pacific herring, Cltipea pallasii. J. Cons. 11:229- 

 247. 



DRAGESUND, O., and P. HOGNESTAD. 



1960. Smasildunderokelsene og smasildfisket 

 1959/60. Fisken Havet 3. 12 p. 

 FRIDRIKSSON, A., and O. AASEN. 



1950. The Norwegian-Icelandic herring tagging 

 experiments. Rep. Norw. Fish. Mar. Invest. 9(11). 

 43 p. 



FRY, D. H., JR., and P. M. ROEDEL. 



1949. Tagging experiments on the Pacific Mackeral 

 U'lieitHiatophortiH diego). Calif. Dep. Fish Game. 

 Fish Bull. 73. 64 p. 



JANSSEN, J. F., JR., and J. A. APLIX. 



1945. The effect of internal tags upon sardines. In 

 Results of tagging experiments in California 

 waters on the sardine (Surdinops cae ruled), p. 

 43-62. Calif. Div. Fish Game, Fish Bull. 61. 



JEFFERTS, K. B., P. K. BERGMAN, and H. F. FISCUS. 

 1963. A coded wire identification system for 



macro-organisms. Nature (Lond) 198:460-462. 



NEWMAN, G. G. 



1970. Stock assessment of the pilchard Sardhiops 

 oeellata at Walvis Bay, South West Africa. S. Afr. 

 Div. Sea Fish. Invest. Rep. 85: 1-13. 



PARKER, R. O., JR. 



1972. An electronic detector system for recovering 

 internally tagged menhaden, genus Brevoortia. 

 U.S. Dep. Comma', NOAA Tech. Rep. NMFS 

 SSRF-654, 7 p. 



REINTJES, J. W. 



1963. An initial inquiry into a photoelectric device 

 to detect menhaden marked with fluorescent pig- 

 ments. Int. Comm. Northwest Atl. Fish., Spec. 

 Publ. 4:362-368. 



ROUNSEFELL, G. A., and E. H. DAHLGREN. 



1933. Tagging experiments on the Pacific herring 

 Clupea pallasii. J. Cons. 8:371-384. 



ft GPO 796-650 



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