The Zinger Asper, standard-bearer for the quality of our rivers

Partner RNPs: Baronnies provençales, Doubs, Verdon

INRAE departments and units: AQUA-Recover, Ecobiop

An endemic species of the Rhône basin, the Zinger Asper (also known as the Rhône Streber) is a gauge of the quality of the ecosystem. Since the 1980s, the population of this species has declined, and almost disappeared in the early 1990s. In response, several European research and action programmes were launched in 1992, followed in 2008 by pilot operations aimed at launching a national action plan (NAP) for the preservation of the species. INRAE and the Verdon, Doubs and Baronnies Provençales Regional Nature Parks are committed to this, working together on a series of management, protection and awareness-raising initiatives.

Strongly supported by research, the PNA1 (2012-2016) has led to the launch of groundbreaking research into the biology and ecology of the zinger asper. This is the case with “dietary metabarcoding”, a technique deployed by INRAE and the University of Aix-Marseille that has made it possible to define the fish’s diet based on an analysis of the DNA contained in its faeces. Genetic studies also revealed the most robust and most vulnerable populations. The plan has also led to the repopulation of the species.

More than 100 kilometres of rivers were reclaimed between 2009 and 2018, and three new populations were discovered thanks to the installation of fish ladders, the restoration of ecological continuity, reintroduction operations and genetic monitoring by INRAE.

The aim of the PNA2 (2020-2030) is to establish the long-term presence of the zinger asper while expanding its territory. INRAE’s UMR Recover and Ecobiop are leading several of the monitoring and restoration projects.

Two scientists out of the fourteen members of the PNA2 scientific and technical council are from INRAE.

Have a question? Contact usHave a question? Contact us