Species and habitats - Echiichthys vipera - All ages - IBTS Multi-annual abundance in January (1980-1990, 1991-2000 , 2001-2010))
Description
Due to data paucity, the interpolated maps were computed using all the data available over three periods : 1980-1990, 1991-2000 and 2001-2010. Biologic data have been expressed in abundance (numbers or density values (nbr/km²)) and always required to be log-transformed using a log10(x+1) transformation.