How to assess fin damage in rainbow trout, Oncorhynchus mykiss?

Type Article
Date 2007-06
Language English
Author(s) Person Jeannine1, Le Bayon Nicolas1, Gros Sylvie1
Affiliation(s) 1 : IFREMER, Ctr Brest, UMR 1067, F-29280 Plouzane, France.
Source Aquatic Living Resources (0990-7440) (EDP Sciences), 2007-06 , Vol. 20 , N. 2 , P. 191-195
DOI 10.1051/alr:2007031
WOS© Times Cited 23
Keyword(s) Fin erosion, Oncorhynchus mykiss, Rainbow trout
Abstract Fin condition was examined in 100-500 g hatchery-reared rainbow trout sampled in a large range of environmental conditions of an experimental farm. A method that is simple to use, requires little training, and does not need costly sophisticated equipment or reference to a model is proposed to assess fin erosion (defined as a decrease in size and profile alteration of fins). A procedure to reliably measure the length of the longest ray present in two selected fins (dorsal and pectoral) is described. Fin general profile is assessed using five levels of erosion based on the precise rank of intact or eroded rays to limit subjective bias. The suitability of the two descriptors of fin erosion under laboratory, farm or field conditions is discussed.
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