Skeletal anomaly assessment in diploid and triploid juvenile Atlantic salmon (Salmo salar L.) and the effect of temperature in freshwater

Amoroso, G., Adams, M.B., Ventura, T., Carter, C.G., and Cobcroft, J.M. (2016) Skeletal anomaly assessment in diploid and triploid juvenile Atlantic salmon (Salmo salar L.) and the effect of temperature in freshwater. Journal of Fish Diseases, 39 (4). pp. 449-466.

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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 (0.2-8g) and the second the effect of ploidy, temperature (14 degrees C and 18 degrees C) and their interaction (8-60g). 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.

Item ID: 50037
Item Type: Article (Research - C1)
ISSN: 0140-7775
Keywords: aquaculture, Atlantic salmon, lower jaw deformity, opercular shortening, triploid, vertebral deformities
Funders: Collaborative Research Network (CRN) Program, Institute of Marine and Antarctic Studies (IMAS), University of Tasmania (UTAS), University of the Sunshine Coast (USC)
Projects and Grants: UTAS Tasmania Graduate Research scholarship, USC CRN Research Fellowship
Date Deposited: 30 Aug 2017 15:31
FoR Codes: 30 AGRICULTURAL, VETERINARY AND FOOD SCIENCES > 3005 Fisheries sciences > 300501 Aquaculture @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830102 Aquaculture Fin Fish (excl. Tuna) @ 100%
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