The concentrations of Cd, Pb, Ni and Hg were determined in gill, liver and muscle of Barbus xanthopterus in down streams of Karoon and Dez Rivers during summer 2009. Heavy metal concentrations varied significantly, depending on the types of the tissue in fish species. The levels of heavy metals such as Cd, Pb, Ni and Hg in the Barbus xanthopterus of Karoon River were higher than in B...

The gills of freshwater mussels perform many functions that depend on water flow through the water canals and channels. Regulation of water flow depends in part on ciliary activity and in part on the contraction of musculature underlying the gill filament and water channel epithelium. Obliquely striated muscles control water canal openings (ostia) at the base of the filaments and also at the en...

Alvinocaris longirostris is a species of shrimp existing in the hydrothermal fields of Okinawa Trough. To date the structure and function of the microbial community associated with A. longirostris are essentially unknown. In this study, by employment of the techniques of high through-put sequencing and clone library construction and analysis, we compared for the first time the community structu...

Previous studies have described the morphology, innervation and O(2)-chemoreceptive properties of neuroepithelial cells (NECs) of the zebrafish gill filaments. The present work describes the ontogenesis of these cells, and the formation of functional O(2)-sensing pathways in developing zebrafish. Confocal immunofluorescence was performed on whole-mount gill preparations using antibodies against...

Bivalve mollusks are an important resource due to their socioeconomic value and the historical genetic of some species. Two nationally oyster species-Portuguese (Crassostrea angulata) Japanese gigas) from distinctive areas in Portugal were studied evaluate sanitary status. Oysters sampled four different sites Portugal. collected populations cultivated a strong ocean-influenced environment Portu...

The article deals with the issue of ecological and toxicological state Volkhov Bay Ladoga Lake — one most polluted water areas reservoir, which is important fisheries importance has a significant impact on quality Neva River in winter. Biological chemical-analytical studies conducted summer this year showed mass lesions fish chronic toxicosis. study bottom sediments did not reveal pronounced de...