Dietary Calcein Marking of Shovelnose Sturgeon and the Effect of Sunlight on Mark Retention

Autor: Dale C. Honeyfield, Thomas A. Bell, Greg A. Kindschi, Jerre W. Mohler
Rok vydání: 2011
Předmět:
Zdroj: North American Journal of Aquaculture. 73:129-134
ISSN: 1548-8454
1522-2055
DOI: 10.1080/15222055.2011.559869
Popis: Calcein, a fluorochrome dye, is a potential fish-marking agent that has not been evaluated in sturgeon. Shovelnose sturgeon Scaphirhynchus platorynchus (average weight, 9.7 g) were fed calcein, immersed in a calcein bath, or left unmarked to determine calcein mark intensity. In the first study, six treatments were evaluated in a two-by-three factorial arrangement. Feed was formulated with 2.0 g of SE-MARK/kg either as powder or in an encapsulated form. Sturgeon were fed the test diets for 5, 10, or 15 d. They readily ate feed containing powdered or encapsulated calcein. Sturgeon fed powdered calcein had more brilliant marks than those fed encapsulated calcein (8.27 versus 4.66 lm; P < 0.03) 6 months postexposure. Fish fed calcein for 15 d (11.26 lm) were more brilliant (P < 0.002) than fish fed for either 5 d (3.02 lm) or 10 d (5.11 lm). Post hoc comparison of the three treatment groups showed that sturgeon fed powdered calcein for 15 d (14.06 lm) were brighter (P < 0.01) than fish fed encapsulat...
Databáze: OpenAIRE
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