Physiological and behavioural constraints hinder albino individuals. Albino animals are rare in the wild; this trait is associated with easy detection by predators, non-native or damaged environments, and exclusively aphotic environments in total darkness. The social aspect of albinism is reported only for human beings, and the effect is distinguishable in time and space when social benefits, a...

The main objectives of study were to determine the concentrations of As and other trace elements (Al, Co, Fe, Ni, Sn, Se) in the muscle, liver, and gills of pikeperch (Sander lucioperca), catfish (Silurus glanis), and pike (Esox lucius), and in the muscle of Prussian carp (Carassius gibelio) and freshwater bream (Abramis brama), to identify relationships between element concentrations and total...

The mechanisms of adaptation that allow the teleost Silurus glanis to maintain its resting oxygen consumption constant when the O2 partial pressure (Po2) m the inspired water (PiO2) varied between 40 and 3kPa were studied at 13 °C. Steadystate values of oxygen consumption, ventilatory and circulatory flow rates, Po2 in the inspired and expired water, PO2 and O2 concentration in the arterial and...

Hypoxic events have always naturally occurred in freshwater ecosystems but are worsening due to anthropogenic activities. Hypoxia tolerance greatly varies among fish species and is difficult quantify nature large species. We analysed the movements of 40 subadult adult European catfish Silurus glanis [(727; 2150) mm] exposed a natural summer hypoxic event shallow lake southeastern France. Catfis...