Histopathological biomarkers in juvenile silver catfish (Rhamdia quelen) exposed to a sublethal lead concentration

被引：23
|
作者：
Munoz, Lautaro [1 ,2 ,3 ]
Weber, Paula [4 ]
Dressler, Valderi [5 ]
Baldisserotto, Bernardo [4 ]
Andres Vigliano, Fabricio [1 ,2 ,3 ]
机构：
[1] Univ Nacl Rosario, Fac Ciencias Vet, Catedra Histol & Embriol, RA-2170 Casilda, Argentina
[2] Univ Nacl Rosario, Fac Ciencias Vet, Ctr Invest Piscicultura Expt CIPEX, RA-2170 Casilda, Argentina
[3] Consejo Nacl Invest Cient & Tecn, Ctr Cient Tecnol Rosario, Rosario, Santa Fe, Argentina
[4] Univ Fed Santa Maria, Dept Fisiol & Farmacol, BR-97105900 Santa Maria, RS, Brazil
[5] Univ Fed Santa Maria, Dept Quim, BR-97105900 Santa Maria, RS, Brazil
来源：
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY | 2015年 / 113卷
关键词：
Lead; Histopathology; Rhamdia quelen; Acute toxicity; TENCH TINCA-TINCA; FISH; TOXICITY; GILLS; PARAMETERS; NITRATE; LETHAL; IMPACT; LIVER;
D O I：
10.1016/j.ecoenv.2014.11.036
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The aim of this study was to determine the 96-h lethal concentration (96-h LC50) of lead (Pb) in silver catfish, Rhamdia quelen, and to determine histopathological biomarkers in fish exposed for 96-h to a sublethal concentration at 25% of the LC50. The 96-h LC50 was 108 mg L-1. In gills, the length and thickness of lamella and thickness of the filament epithelium were significantly higher in fish exposed to Pb for 48-h than in control fish whereas the interlamellar distance decreased. In the liver, the area occupied by lipid droplets and size of hepatocytes showed significantly higher values after 24-h of exposure. The percentage of abnormal renal tubules was higher in fish exposed to Pb, exhibiting a timedependent increase. These variations in histopathological biomarkers permit the definition of the overall response of R. quelen to Pb and the potential usefulness in the monitoring of Pb contamination. (C) 2014 Elsevier Inc. All rights reserved.
引用
收藏
页码：241 / 247
页数：7
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