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<p>Helminth infections in freshwater fish affect fish health, aquaculture productivity, and food safety. This study examined the ecology of gastrointestinal helminths infecting freshwater fish along with other food fishes from the Lucknow region, India. The fish were sampled monthly (January-December 2024) and seasonally from fishers from the Gomti river wetlands. Fish were necropsied, and helminths were identified using standard taxonomic methods. Four major helminth groups trematodes, cestodes, nematodes, and acanthocephalans were detected. Prevalence peaked in snakeheads (65–75%; mean intensity (6–10 worms/host), followed by catfishes (60–80%) and carps (55–70%); salmonids showed the lowest (30–40%). Monsoon seasons showed infection peaks up to 85%, linked to intermediate-host abundance and favorable water conditions. Larger carnivorous hosts, lentic habitats, and cultured ponds were associated with higher burdens, notably <i>Bothriocephalus acheilognathi</i> in cultured carps. The role of host traits, environment in helminth transmission and the need for seasonal parasite-control strategies in northern India were emphasized.</p>

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Ecology and seasonal dynamics of gastrointestinal helminths in freshwater fish from the Gomti river and wetlands, Lucknow, India

  • 期刊论文

  • 发表日期：

    2026年2月25日

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  • Pradeep Kumar,
  • Neeshma Jaiswal,
  • Amar Singh,
  • Sapna Mishra

摘要

Helminth infections in freshwater fish affect fish health, aquaculture productivity, and food safety. This study examined the ecology of gastrointestinal helminths infecting freshwater fish along with other food fishes from the Lucknow region, India. The fish were sampled monthly (January-December 2024) and seasonally from fishers from the Gomti river wetlands. Fish were necropsied, and helminths were identified using standard taxonomic methods. Four major helminth groups trematodes, cestodes, nematodes, and acanthocephalans were detected. Prevalence peaked in snakeheads (65–75%; mean intensity (6–10 worms/host), followed by catfishes (60–80%) and carps (55–70%); salmonids showed the lowest (30–40%). Monsoon seasons showed infection peaks up to 85%, linked to intermediate-host abundance and favorable water conditions. Larger carnivorous hosts, lentic habitats, and cultured ponds were associated with higher burdens, notably Bothriocephalus acheilognathi in cultured carps. The role of host traits, environment in helminth transmission and the need for seasonal parasite-control strategies in northern India were emphasized.