The presence of Vibrionaceae, Betanodavirus and Iridovirus in marine cage-cultured fish: Role of fish size, water physicochemical parameters and relationships among the pathogens

Abdullah, Azila and Ramli, Rimatulhana and Mohammad Ridzuan, Mohd Syafiq and Murni, Munira and Hashim, Shahidan and Sudirwan, Fahmi and Abdullah, Siti Zahrah and Mansor, Nur Nazifah and ..., Sofea Amira and Saad, Mohd Zamri and Amal, Mohammad Noor Azmai (2017) The presence of Vibrionaceae, Betanodavirus and Iridovirus in marine cage-cultured fish: Role of fish size, water physicochemical parameters and relationships among the pathogens. Aquaculture Reports, 7. pp. 57-65. ISSN 2352-5134

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Abstract

The study determines the presence of Vibrionaceae, Betanodavirus and Iridovirus in marine cage-cultured fish, while identifying the roles of fish size, water physicochemical parameters and relationships among the pathogens itself. Cultured grouper and snapper were randomly sampled from a commercial fish farm between February and December 2014. The total body weight and length of individual fish were measured. The kidney, liver and spleen were sampled for bacteria isolation, while for viral identification, the sample of brain, eye, kidney and spleen were used. Water physicochemical parameters during the sampling activities were also determined. Laboratory results revealed isolations of multiple pathogens including Vibrio alginolyticus, V. vulnificus, Photobacterium damselae subsp. damselae (PD), Nervous Necrosis Virus (NNV) and Iridovirus (IV) at low to high prevalence throughout the study period. The weight of affected groupers ranged between 98 g and 719 g, while snappers between 67 g and 982 g. There was a weak and moderate negative correlation between the grouper’s weight and the presence of NNV (R = −0.3684; P < 0.05) and V. vulnificus (R = −0.6451; P < 0.05), respectively. No significant (P > 0.05) difference was noted in the rate of isolated pathogens between groupers and snappers, and between the pathogens affecting snappers. However, detection of IV in groupers was significantly (P < 0.05) higher than V. alginolyticus, V. vulnificus and PD. Isolations of V. vulnificus in groupers showed strong and moderate positive correlations with isolations of PD (R = 0.7069; P < 0.05) and IV (R = 0.6665; P < 0.05), respectively. In snappers, there was strong positive correlation between isolation of V. alginolyticus and NNV (R = 0.7526; P < 0.05). Multivariate analyses showed that water temperature, dissolved oxygen, ammonia, iron and nitrite were the most significant water physicochemical parameters associated with presence of these pathogens.

Item Type:	Article (Journal)
Additional Information:	7205/57329
Uncontrolled Keywords:	Grouper, Snapper, Vibrionaceae, Betanodavirus, Iridovirus
Subjects:	Q Science > Q Science (General) Q Science > QL Zoology Q Science > QR Microbiology > QR355 Virology S Agriculture > SH Aquaculture. Fisheries. Angling
Kulliyyahs/Centres/Divisions/Institutes (Can select more than one option. Press CONTROL button):	Kulliyyah of Science > Department of Marine Science
Depositing User:	Faizah Shahbudin
Date Deposited:	07 Jul 2017 10:06
Last Modified:	29 Sep 2017 11:06
URI:	http://irep.iium.edu.my/id/eprint/57329

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