Microcotyle spp. infestation in the juveniles of wild Narrow-barred Spanish mackerel

Ramudu, Kurva Raghu and Sanil, N K and Hussain, Tanveer and Mahesh, V and Purushottama, G B and Kalidas, C and Suresh Babu, P P (2024) Microcotyle spp. infestation in the juveniles of wild Narrow-barred Spanish mackerel. Marine Fisheries Information Service No.260. p. 42. ISSN 0254-380X

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Abstract

A study was undertaken to record the occurrence of parasitic infestations in the juveniles of the Narrow-barred Spanish mackerel, Scomberomorus commerson Microcotyle spp. infestation in the juveniles of wild Narrow-barred Spanish mackerel landed in Karwar, Karnataka. Twentythree fishes (300 ± 30g and 30 ± 5cm) collected from Karwar fish landing centre in January 2023 were analysed using standard necropsy procedures. Gills, skin, fins, intestine, spleen, liver and kidney were examined under the microscope for the presence of parasites. Of the 23 fish examined, five were infected with Microcotyle spp. on their gills (PFI: 21.74%). The infested gills were pale in colour and covered with a thick coat of mucus. Wet mount of the gill showed the presence of Microcotyle spp. Parasites of the genus Microcotyle mainly infect the gills of marine fishes and generally feed on blood of the host.

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