Betanodavirus Infection in Barramundi in Riau Islands

Abstract

Diseases that can cause very high economic losses are viruses and one of them is Betanodavirus or commonly called Viral Nervous Necrosis (VNN). VNN is a disease registered by The Office International des Epizooties (OIE) and is a major problem in marine fishery production in the world. This virus is able to infect fish from larva size to consumption size in a short period of time to reach death with a frequency of 80% to 100%. The disease can infect barramundi and is spread throughout the Riau Islands. This study used a live fish sampling method showing VNN signs and freshly dead fish. The research samples were obtained from several cities and districts in the Riau Islands Province, including Batam City, Bintan Regency, and Tanjung Balai Karimun Regency, the sample selection was based on clinical symptoms and fish mortality. Then the samples were necropsied for eye and brain organs, then amplified using primers targeting the RNA 2 gene. The results showed that VNN had been detected in the Riau Islands Province, i.e. Batam City, Bintan Regency, and Tanjung Balai Karimun Regency.

Prevalence of Ectoparasites in Tilapia (Oreochromis niloticus) in Tarakan

“…According to research by Alimuddin et al (2022), the high incidence is significantly impacted by water quality, which can have an impact on physiologic and metabolic processes. In addition to the great prevalence, parasite infection is not accompanied by any outward abnormality or clinical signs (Rifai et al, 2022).…”

Color Brightness and Growth Levels of Goldfish (Carassius auratus) Reared with Different Light Spectrums

“…Ornamental fish is a potential fishery commodity in Indonesia. Besides being able to be cultivated on a large or small scale, capital turnover is also relatively fast (Rifai et al, 2022). Currently, freshwater ornamental fish like goldfish (Carassius auratus) are the commodities most in demand by the public (Sollid, 2005).…”