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<br />. REFERENCE NUMBER: <br />CITATION: <br /> <br />009 <br /> <br />Muth, R. T., and T.P. Nesler. 1989. Marking Colorado squawfish <br />embryos and newiy hatched lalVae with tetracycline. Southwestern <br />Naturalist 34(3):432-436. <br /> <br />SPECIES AND LIFE STAGE: <br /> <br />CS, CS_LARVAE <br /> <br />TOPICS: <br /> <br />Culture Techniq~ Research <br /> <br />COLORADO SQUA WFISH, MARKING, TETRACYCLINE, <br />REARING <br /> <br />KEYWORDS: <br /> <br />SUMMARY: Techniques were, developed for mass marking 5-day-old larvae of Colorado squawfish by . <br />inoorporation of tetracycline hydrochloride (TC) in otoliths though immersion in TC solutioDS. <br />Best results were found when S-day-old squawtish were immersed 4 to 12 h in a solution of 350 <br />mg TC/l. TC was retained for at least 77 days after treatmenL <br /> <br />Colorado squawfish eggs were obtained from Dexter Hatchery. Eggs were immersed in a 0.2% <br />solution of formalin for about 20 min to treat against fungal infectioDS. Six days after hatching <br />lanae were fed twice daily with live Anemia nauplli and Tetra Min Fry dieL <br /> <br />. <br /> <br />. <br /> <br />A-9 <br />