alexa Effect of Temperature and Seasonality Principal Epizootiological Risk Factor on Vibriosis and Photobacteriosis Outbreaks for European Sea Bass in Greece (1998-2013)
ISSN: 2155-9546

Journal of Aquaculture Research & Development
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Research Article

Effect of Temperature and Seasonality Principal Epizootiological Risk Factor on Vibriosis and Photobacteriosis Outbreaks for European Sea Bass in Greece (1998-2013)

Georgios Bellos1*, Panagiotis Angelidis2 and Helen Miliou1

1Department of Applied Hydrobiology, Faculty of Animal Science and Aquaculture, Agricultural University of Athens, GR-11855 Athens, Greece

2Laboratory of Ichthyology, Faculty of Veterinary Medicine, Aristotle University of Thessaloniki, GR-54124 Thessaloniki, Greece

*Corresponding Author:
Georgios Bellos
Department of Applied Hydrobiology
Faculty of Animal Science and Aquaculture
Agricultural University of Athens
GR-11855 Athens, Greece
Tel: 923326-022624
E-mail: [email protected]

Received Date: March 17, 2015; Accepted Date: April 08, 2015; Published Date: May 30, 2015

Citation: Bellos G, Angelidis P, Miliou H (2015) Effect of Temperature and Seasonality Principal Epizootiological Risk Factor on Vibriosis and Photobacteriosis Outbreaks for European Sea Bass in Greece (1998-2013). J Aquac Res Development 6:338. doi:10.4172/2155-9546.1000338

Copyright: © 2015 Bellos G, et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

 

Abstract

Our epizootiological survey was focused on bacterial diseases of European sea bass, Dicentrarchus labrax L., an important Mediterranean species for aquaculture, in Greece. Vibriosis and Photobacteriosis were the most severe bacterial diseases, located in the majority of Greek mariculture areas (Argolikos gulf, North Evoic gulf Maliakos gulf and Thesprotia Sagiada coast, Amvrakikos gulf, Aitoloakarnania Mitikas coast, Ionian island coasts) during the period 1998-2013. A database of 152 cases was formulated, from which 134 cases concerned vibriosis and photobacteriosis, while the rest outbreaks were motile aeromonas septicemia and tenacibaculosis. PCA pointed out three principal components with the following ranking order: a) temperature and seasonality, b) group of mariculture areas and average body weight, and c) case year. The results of logistic analysis showed the temperature - seasonality as the first, in ranking, and the only statistically significant epizootiolological risk factor. Contrast Test (low vs. high temperature values) also proved the significant effect of temperature (p<0.05). Vibriosis pathogen Listonella (Vibrio) anguillarum was recorded in a wide temperature range (12-260°) in the most of Greek rearing locations. In contrast, Vibriosis from rest vibria was found to a narrow temperature range, especially in Argolikos gulf, North Evoic gulf and Ionian Island coasts. Specifically, V. harveyi cases emerged at high temperatures (19-220°C), while those of V. alginolyticus and V. splendidus II at low temperatures (15-170°C). Photobacterium damselae subspecies piscicida in most of Greek rearing areas and Photobacterium damselae subspecies damselae in Argolikos gulf, North Evoic gulf and Ionian Island coasts appeared in a relatively wide range (19-250°C). However, they showed higher frequencies in warm period. The results will support an evolutionary epizootiological survey and will reinforce a preventive biosecurity program in Greek mariculture taking into consideration the temperature - seasonality factor along with the classical sanitary approach.

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