Histological Response of Fish Gills to Metal Pollution: Common Carp, Cyprinus carpio L., and Common Rudd, Scardinius erythrophthalmus L., from Topolnitsa Reservoir, Bulgaria

被引:0
作者
Yancheva, Vesela S. [1 ]
Stoyanova, Stela G. [2 ]
Velcheva, Iliana G. [1 ]
Georgieva, Elenka S. [2 ]
机构
[1] Paisij Hilendarski Univ Plovdiv, Dept Ecol & Environm Conservat, Fac Biol, Plovdiv, Bulgaria
[2] Paisij Hilendarski Univ Plovdiv, Sect Histol & Embryol, Dept Dev Biol, Fac Biol, Plovdiv, Bulgaria
来源
ACTA ZOOLOGICA BULGARICA | 2016年 / 68卷 / 01期
关键词
bioaccumulation; metals; fish; gills; histological alterations; seasons; OREOCHROMIS-NILOTICUS; NILE TILAPIA; BIOACCUMULATION; EPITHELIUM; CADMIUM; MERCURY; COPPER; LIVER; WATER;
D O I
暂无
中图分类号
Q95 [动物学];
学科分类号
071002 ;
摘要
Concentrations of six metals (As, Cd, Cu, Ni, Pb and Zn) were measured in surface waters of Topolnitsa Reservoir, Bulgaria, located in a region with intensive copper mining. The process of metal bioaccumulation in gills of two cyprinid fish species,: common carp (Cyprinus carpio L.) and common rudd (Scardinius erythrophthalmus L.), was studied in spring, summer and autumn. Higher metal concentrations in both water and fish gill samples in summer were detected. Furthermore,Histological alterations in the gill surface tissues of both fish species and the degree of expression of lesions were determined in the three seasons. Mostly pProliferative and degenerative changes in gill epithelium were observed. Changes in the blood circulatory system were presented as vasodilatation in the central venous sinus and secondary lamellae, as well as aneurysms. Overall, the extent and severity of lesions were more expressed in gills of the common carp gills than of in the common rudd. This is likely because the carp is a benthic feeder and more often has contacted with the sediments where the metal concentrations were times higher than in water. In addition, the histological alterations were more severe in summer in both fish species, which could be linked to the higher concentrations of metals in water and gills in this season.
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收藏
页码:103 / 109
页数:7
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