Koi Herpes Virus Outbreak among Common Carp in Floating Net Cages in Kampar, Indonesia

Irwan Effendi, Nanang Muchson, Ritawati Simanjuntak, Risma Simanjuntak, Mellya Widantari, Zulfahmi Zulfahmi, Indra Suharman, Adriman Adriman, Brian Austin

Abstract

This study aimed to determine the causal agent of the mortality of common carp (Cyprinus carpio L.) from January to April 2023, amounting to ~350 tonnes. A series of checks was carried out for ~3 months, examining water quality, the presence of parasites and pathogenic bacteria, and determining the presence of koi herpes virus (KHV). The results indicated that the water quality was normal and could support common carp. Dactylogyrus sp. was identified, but with a low prevalence (18.51%). Some fish samples revealed the presence of Aeromonas hydrophila, but the prevalence was low (14.81%). KHV was common, reaching a prevalence of 88.89% in March. KHV is considered to be the main cause of mass mortality. Appropriate management regimes must be in place to prevent future outbreaks of the disease, including ensuring the acquisition of certified healthy fish/eggs, adopting sensible stocking and feeding regimes, and monitoring water quality. The symbiosis mutualism of KHV with other aquatic organisms is worth considering, which can be used as a research perspective.

 

Keywords: Aeromonas hydrophila; Cyprinid herpesvirus; Dactylogyrus sp.; fish diseases; carp disease

 


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