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Alevin
Young fish living on its yolk reserves or having not yet acquired its adult form.
Hatching/Hatchery
Algae
Ammonification
Amphibian
Vertebrate animal that has the characteristic of starting its life in the water. At birth, an amphibian breathes through its gills, like a fish. As an adult he now has lungs through which he can breathe freely, but he continues to absorb most of the oxygen he needs through the skin.
Cetacean
Berne Convention
Crustacean
Arthropods with a body made up of segments linked to each other by a joint membrane and wearing a pair of jointed appendix. They can be distinguished from other arthropods by the presence of two pairs of antennae. They live in freshwater, marine waters or in terrestrial environments. They can be mobile or fixed to a support.
Biological cycle
Carbon cycle
Phosphorus cycle
Sulphur cycle
Protected species
Flora
Aquatic flora
Macrophyte biological index for rivers
Lichen
Macroplankton
Organic matter
Microplankton
Molluscs
Nutrient
Electric fishing
Method used to evaluate the abundance of fish species in a portion of a stream and to precise the different populations. It consists in the creation of an electric current which attracts fish. Then, paralyzed by electricity, they rise to the surface, which helps their identification and counts. After a little while, fish are free to circulate in the stream again.