PROMOTING ACCESS TO AFRICAN RESEARCH

African Zoology

Log in or Register to get access to full text downloads.

Remember me or Register



DOWNLOAD FULL TEXT Open Access  DOWNLOAD FULL TEXT Subscription or Fee Access

A comparison of three techniques for fluorochrome marking of juvenile Clarias gariepinus otoliths

Reece Wartenberg, Anthony J. Booth, Olaf L.F. Weyl

Abstract


Intramuscular injection of the antibiotic oxytetracycline (OTC) has been the only method previously employed for chemically marking C. gariepinus otoliths for ageing studies. This study compared intramuscular injection, immersion, and dietary  incorporation methods of administering OTC to determine the most effective technique. No differences in either growth or mortality were found between experimental groups while intramuscular injection of OTC was found to be superior to either mass immersion or dietary inclusion of OTC when marking Clarias gariepinus otoliths.


Key words: African sharptooth catfish, oxytetracycline, fluorochrome marking.




http://dx.doi.org/10.3377/004.046.0119
AJOL African Journals Online