Parasitic anomalies observed in snow trout due to anthropogenic stress in water bodies

There is interrelationship of the environmental conditions and fish health. Decrease or increase of pollution in aquatic ecosystem have direct impact on presence or absence of parasites. Fish living under optimum environmental, well-nourished conditions are more resistant to diseases than fish weakened by malnutrition caused by parasite infestation or due to deterioration of environmental conditions because of pollution. Fish encounters common parasites in wild and in culture systems. Parasites attach to the host through suckers and hooks and make their way inside the host through different means, which include skin, through mouth along with food, by means of gills. The hosts were collected during Jan 2019 to Jan 2020 from river Veshaw. During this study it was observed that presence of parasites causes some changes in fish which can serve as indicators of deterioration in aquatic habitat. Clinical signs were noticed in fish hosts collected from sites which received waste due to anthropogenic activities. Parasitic anomalies in the host collected from polluted site was observed to include body deformaties, gastric distention, lesions in gut, increased mucus production, damage in gill filaments etc. (C) 2022 The Author(s). Published by Elsevier B.V. on behalf of King Saud University.

Automated summary

There is a correlation between environmental conditions and fish health. Pollution in aquatic ecosystems directly affects the presence or absence of parasites. Fish living in optimal environmental conditions and well-nourished are more resistant to diseases than those weakened by malnutrition caused by parasite infestation or environmental deterioration due to pollution. Parasites attach to the host through suckers and hooks and enter the host through various means. The presence of parasites can cause changes in fish that serve as indicators of deterioration in the aquatic habitat.