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Lernaea cyprinacea, commonly known as anchor worms, represents a significant parasitic threat to Indian Major Carp (IMC) species in the aquaculture system. Lernaea parasitizing is widely reported, affecting brood stock, fingerlings, and marketable-sized freshwater fish species globally. This study aims to comprehensively investigate Lernaea infections in ten fish farms across Bihar, India, focusing on the prevalence, intensity, water quality parameters, fish weight, and associated factors affecting the occurrence of this parasite. The research combines field surveys, laboratory analysis, and epidemiological assessments to provide a holistic understanding of the impact of Lernaea on the health and productivity of Indian major carp populations. The analysis revealed a positive correlation between host body weight and the intensity of Lernaea cyprinacea infestation. Larger fish were more susceptible to parasitic infections, highlighting a potential vulnerability associated with the size of the host. In conclusion, this study contributes valuable insights into the dynamics of Lernaea cyprinacea infections in IMC stocks, emphasizing the species-specific susceptibility and the influence of host body weight on parasitic infestations. The findings provide a foundation for informed aquaculture practices aimed at minimizing the prevalence and impact of Lernaea, thereby enhancing the overall health and productivity of fish farms in the region. In conclusion, current research confirms that Labeo catla and larger fish are very susceptible to Lernaea cyprinacea infection.
Ranjan et al. (Sat,) studied this question.