A report on two new myxozoan parasites infecting gills of fingerlings of Indian major carps cultured in nursery ponds in Punjab (India)

Abstract

This paper presents the morphological characteristics of two new species belonging to the genus viz n. sp. and n. sp., parasites infecting gill lamellae and gill filaments of fingerlings of (Ham.) and (Ham.) respectively collected from nursery ponds located in the village Fagan Majra, District Fatehgarh Sahib, Punjab (India). A total of 90 fingerlings were examined (40 and 50 ). Out of which, 32 and 19 fishes were found infected. The total prevalence rate was recorded as 56.66%. The age of the fish was recorded as 2-3 months and length of the fish ranged 4-4.5 cm. The plasmodia of n. sp. were round to irregular, 0.6-1.0 mm in diameter. Myxospores oval to spherical, pot-shaped in frontal view with a prominent knob at anterior end, measured 5.83 × 4.29 µm in size. Polar capsules were equal, broadly pyriform, 1.95 × 1.70 µm in size having 3-4 polar filament coils. The plasmodia of n. sp. were round to oval, 0.8-1.5 µm in diameter. Myxospores egg-shaped in frontal view also having prominent knob at the anterior end, measured 8.58 × 5.2 µm in size. Polar capsules were equal, pyriform, 3.47 × 1.80 µm in size having 5-6 polar filament coils. Gill plasmodium index showed heavy infection in both of the species. This is the first report of myxobolid infection in the fingerlings of Indian major carps in nursery ponds in Punjab (India).

Prevalence, site and tissue preference of myxozoan parasites infecting gills of cultured fingerlings of Indian major carps in District Fatehgarh Sahib, Punjab (India)

“…In total, 10 species of myxosporean parasites belonging to the genus Myxobolus i.e. M. knobii Kaur and Ahmad (2017); M. majraiensis Kaur and Ahmad (2017); M. markiwi Kaur and Ahmad (2016); M. naini Kaur and Singh (2008); M. nanokiensis ; M.…”

Pathological effects due to metacercariae of Clinostomum piscidium migration in snakeskin gourami (Trichopodus pectoralis) in Thailand

“…In most aquatic ecosystems, fishes are hosts to parasites, and sometimes, these parasites can affect fish biology and health (7)(8)(9)(10). Some of the most dramatic cases occur when fishes are intermediate hosts for parasites.…”

“…Some of the most dramatic cases occur when fishes are intermediate hosts for parasites. It has been shown that parasites reduce fish production, affect fish health, make fish more vulnerable to other infections, and even result in fish deaths (11)(12)(13). Fish parasites lead to a reduction in economic returns and a decline in the availability of fish as protein-rich sources (14).…”