Accumulation of neurotoxic organochlorines and trace elements in brain of female European eel (Anguilla anguilla).

Xenobiotics such as organochlorine compounds (OCs) and metals have been suggested to play a significant role in the collapse of European eel stocks in the last decades. Several of these pollutants could affect functioning of the nervous system. Still, no information is so far available on levels of potentially neurotoxic pollutants in eel brain.

Ontogenesis of agonistic vocalizations in the cichlid fish Metriaclima zebra.

While acoustic communication has been described in adults of various fish species, our knowledge about the ontogeny of fish sound production is limited. In adults, sound signals are known to be involved during aggressive interactions. However, aggressive behaviour may appear early in the life of fishes due to the possible competition for food and space.

High hydrostatic pressure improves the swimming efficiency of European migrating silver eel.

To reproduce, European eels must undergo a long migration without feeding. During this migration they have to cope with many environmental factor changes, one of them being hydrostatic pressure. We focus on the effects of hydrostatic pressure on swimming energetics: does the pressure exposure modify swimming efficiency? By using a specially designed Blazka type swimming tunnel able to work under pressure, we have measured oxygen consumption of migrating male silver eels at different swimming speeds (from 0.

Glycolytic fluxes in European silver eel, Anguilla anguilla: sex differences and temperature sensitivity.

European silver eels migrate 6000 km to their supposed spawning area in the Sargasso sea. As the eel is fasting, this intense swimming activity is realised only with fat stores, involving mainly red muscle i.e.

Pressure and temperature interactions on aerobic metabolism of migrating European silver eel.

During their migration for reproduction, European eels have to cope with many environmental factors changes. The main changes concern hydrostatic pressure and temperature that are important environmental and physiological factors when considering life in the deep sea. We focus on the consequences of pressure (from 0.