The collection of ichthyological samples, Colisa, results from the merging of historical samples collected by 3 INRA units (U3E in Rennes, ECOBIOP in Saint Pée sur Nivelle and CARRTEL in Thonon les Bains) and AFB-INRA Pole Gest’Aqua. These samples come from long term monitoring and research activities conducted by these units and from a national catch declaration scheme (angling and professional fishery). It consists of more than 200000 scales or other tissue samples of fish from 26 species collected in France over 50 years. Beyond age and growth, these samples, carrying DNA, allow genetic characterization of individuals or populations. Via microchemistry, they alos allow to characterize the trophic status and the environmental conditions of life of animals. The conservation of these tissues allow to investigate retrospective changes (global and local). Colisa is a part of BRC4env, one of the 5 specialized pillars of the French Research Infrastructure "Agricultural Resources for Research" (AgroBRC-RARe, http://www.enseignementsup-recherche.gouv.fr/cid99437/ressources-agronomiques-pour-la-recherche-rare.html) federating BRCs: animals as CRB-Anim, plant as CRB-Plantes, micro-organisms as CIRM, environmental resources as BRC4Env, and forests as CRB-Forets. BRC4Env includes BRCs and collections hosted by INRA, IRD, CIRAD, CNRS, technical and higher education institutions. (2018-09-20).