North American Journal of Fisheries Management 22:223–228, 2002 American Fisheries Society 2002 Predation by Captive Wild Brook Trout on Calcein-Marked versus Nonmarked Atlantic
other fish species marked with the fluorochrome dye calcein exhibit a green fluorescence in fin rays and other calcified structures under specific optical conditions. To determine whether brook trout Salvelinus fontinalis would preferentially prey upon calcein-marked individ-uals, we introduced calc...
| Main Authors: | , , , , |
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| Format: | Text |
| Language: | English |
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| Online Access: | http://citeseerx.ist.psu.edu/viewdoc/summary?doi=10.1.1.534.6914 http://www.fws.gov/northeast/fisherycenter/pdfs/Mohleretal2002.pdf |
| Summary: | other fish species marked with the fluorochrome dye calcein exhibit a green fluorescence in fin rays and other calcified structures under specific optical conditions. To determine whether brook trout Salvelinus fontinalis would preferentially prey upon calcein-marked individ-uals, we introduced calcein-marked and nonmarked At-lantic salmon fry simultaneously to captive wild brook trout in four controlled indoor raceway trials. Each trial consisted of 2 brook trout and 100 each of calcein-marked and nonmarked Atlantic salmon fry; no indi-viduals were used in more than one trial. At the ter-mination of each 3-d trial, predators were removed from raceways, and surviving Atlantic salmon fry were ex-amined with a calcein detection device to tally numbers of marked and nonmarked individuals. In individual tri- |
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