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Skeletal anomaly assessment in diploid and triploid juvenile Atlantic salmon ( Salmo salar L.) and the effect of temperature in freshwater.
- Source :
-
Journal of Fish Diseases . Apr2016, Vol. 39 Issue 4, p449-466. 18p. - Publication Year :
- 2016
-
Abstract
- Triploid Atlantic salmon tend to develop a higher prevalence of skeletal anomalies. This tendency may be exacerbated by an inadequate rearing temperature. Early juvenile all-female diploid and triploid Atlantic salmon were screened for skeletal anomalies in consecutive experiments to include two size ranges: the first tested the effect of ploidy (0.2-8 g) and the second the effect of ploidy, temperature (14 °C and 18 °C) and their interaction (8-60 g). The first experiment showed that ploidy had no effect on skeletal anomaly prevalence. A high prevalence of opercular shortening was observed (average prevalence in both ploidies 85.8%) and short lower jaws were common (highest prevalence observed 11.3%). In the second experiment, ploidy, but not temperature, affected the prevalence of short lower jaw (diploids > triploids) and lower jaw deformity (triploids > diploids, highest prevalence observed 11.1% triploids and 2.7% diploids) with a trend indicating a possible developmental link between the two jaw anomalies in triploids. A radiological assessment ( n = 240 individuals) showed that at both temperatures triploids had a significantly ( P < 0.05) lower number of vertebrae and higher prevalence of deformed individuals. These findings (second experiment) suggest ploidy was more influential than temperature in this study. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 01407775
- Volume :
- 39
- Issue :
- 4
- Database :
- Academic Search Index
- Journal :
- Journal of Fish Diseases
- Publication Type :
- Academic Journal
- Accession number :
- 113528264
- Full Text :
- https://doi.org/10.1111/jfd.12438