کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4421624 1308518 2009 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Toxic effects of Streptomyces griseus spores and exudate on gill pathology of freshwater fish
موضوعات مرتبط
علوم زیستی و بیوفناوری علوم محیط زیست شیمی زیست محیطی
پیش نمایش صفحه اول مقاله
Toxic effects of Streptomyces griseus spores and exudate on gill pathology of freshwater fish
چکیده انگلیسی

Many unexplained fish-kills in British waters are considered microbial in origin and a large proportion of field sites contains elevated concentrations of filamentous actinobacteria. The present study has shown that a strain of Streptomyces griseus, isolated from field sites, elicits pathological changes to the gills of fish under laboratory conditions which mirror those found in situ. These changes include hyperplasia leading to fusion of the secondary lamellae and loss of microridging on the filamental epithelium of the primary lamellae. Juveniles of up to six fish species were exposed to spore suspensions or exudate of S. griseus in the range of 1×102–1×106 spores ml−1 for up to 96 h. The exudate was more potent than the spores and there was a positive correlation between exudate concentration and the rate and extent of fish gill pathology with bream and rainbow trout being more sensitive than carp, tench and roach. The results are discussed in the context of recognising and managing potential fish mortalities caused by microbial toxins.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ecotoxicology and Environmental Safety - Volume 72, Issue 1, January 2009, Pages 173–181
نویسندگان
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