Morphological Investigation on Gills and Liver of Freshwater Fish from Dam Lake “Studen Kladenets”

I. VELCHEVA1, E. TOMOVA1, D. ARNAUDOVA2 and A. ARNAUDOV1

1 University of Plovdiv “Paisii Hilendarski”, Faculty of Biology, BG – 4000 Plovdiv, Bulgaria
2 University of Plovdiv “P. Hilendarski”, Branch “L. Karavelov”, BG - 6600 Kardzhali, Bulgaria

Abstract

VELCHEVA, I., E. TOMOVA, D. ARNAUDOVA and A. ARNAUDOV, 2010. Morphological investigation on gills and liver of freshwater fish from dam lake “Studen kladenets”. Bulg. J. Agric. Sci., 16: 364-368

The histostructure of gills and liver (hepatopancreas) of the bleak (Alburnus alburnus L.), rudd (Scardinus erythrophtalmus L.) and perch (Perca fluviatilis L.) inhabiting the dam “Studen Kladenets” was studied. Histopathological changes were found in the liver (hepatopancreas) and gills of all three investigated fish species. The morphological alterations in the liver were mainly degenerative, but necrotic and hyperemic changes in the parenchyma were also found. Morphological changes in gills are of hypertrophic type, most likely of a compensatory type.

Key words: freshwater fish, gills, liver, histopathology
Abbreviations: HE – hematoxylin and eosin

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