In this study, the impact of disper

In this study, the impact of dispersed oil was assessed in Dicentrarchus labrax, a fish frequently used as an
oil contamination indicator species. Fish were exposed for 48 h to (mechanically and chemically) dispersed
oil and dispersant alone. The impact of these exposure conditions was assessed on cardiac function
by measuring (i) the contraction strength, the contraction and the relaxation speeds (ii) the cardiac
energy metabolism using respirometry on permeabilized cardiac fibers. Compared to control, the increase
of polycyclic aromatic metabolites observed in the bile indicated oil contamination in our fish. Following
48 h of oil exposure at realistic oil concentrations, alterations of cardiac performances were observed. A
decrease in contraction strength, contraction and relaxation speeds was observed in the presence of oil
without effect of dispersant on these three parameters. Looking at cardiac energy metabolism, dispersant
alone decreases all the activity of the respiratory chain and increases the proton leak. From these results,
it appears that the observed decrease in cardiac performance in fish exposed to oil was not linked to a
decrease in energy availability.

ผลลัพธ์ (อังกฤษ) 2:

In this Study, the Impact of Oil was dispersed Assessed in Dicentrarchus labrax, a Fish Frequently used as an
Oil contamination Indicator species. Fish were exposed for 48 H to (mechanically and chemically) dispersed
Oil and dispersant alone. The Impact of these conditions was Assessed exposure on cardiac function
by measuring (I) the strength contraction, the contraction and the Relaxation speeds (II) the cardiac
Energy metabolism using Respirometry on Permeabilized cardiac fibers. Compared to Control, the increase
observed in the bile metabolites of polycyclic Aromatic indicated in our Fish Oil contamination. Following
48 H of Oil Oil exposure at realistic concentrations, Alterations of cardiac performances were observed. A
decrease in contraction strength, contraction was observed speeds and Relaxation in the Presence of Oil
Without Effect of dispersant on these Three Parameters. Looking at Energy cardiac metabolism, dispersant
alone decreases the Activity of all the respiratory chain and increases the Proton leak. From these results,
it appears that the observed decrease in cardiac exposed to Performance in Fish Oil was not linked to a
decrease in Energy Availability.