Know more

Our use of cookies

Cookies are a set of data stored on a user’s device when the user browses a web site. The data is in a file containing an ID number, the name of the server which deposited it and, in some cases, an expiry date. We use cookies to record information about your visit, language of preference, and other parameters on the site in order to optimise your next visit and make the site even more useful to you.

To improve your experience, we use cookies to store certain browsing information and provide secure navigation, and to collect statistics with a view to improve the site’s features. For a complete list of the cookies we use, download “Ghostery”, a free plug-in for browsers which can detect, and, in some cases, block cookies.

Ghostery is available here for free:

You can also visit the CNIL web site for instructions on how to configure your browser to manage cookie storage on your device.

In the case of third-party advertising cookies, you can also visit the following site:, offered by digital advertising professionals within the European Digital Advertising Alliance (EDAA). From the site, you can deny or accept the cookies used by advertising professionals who are members.

It is also possible to block certain third-party cookies directly via publishers:

Cookie type

Means of blocking

Analytical and performance cookies

Google Analytics

Targeted advertising cookies


The following types of cookies may be used on our websites:

Mandatory cookies

Functional cookies

Social media and advertising cookies

These cookies are needed to ensure the proper functioning of the site and cannot be disabled. They help ensure a secure connection and the basic availability of our website.

These cookies allow us to analyse site use in order to measure and optimise performance. They allow us to store your sign-in information and display the different components of our website in a more coherent way.

These cookies are used by advertising agencies such as Google and by social media sites such as LinkedIn and Facebook. Among other things, they allow pages to be shared on social media, the posting of comments, and the publication (on our site or elsewhere) of ads that reflect your centres of interest.

Our EZPublish content management system (CMS) uses CAS and PHP session cookies and the New Relic cookie for monitoring purposes (IP, response times).

These cookies are deleted at the end of the browsing session (when you log off or close your browser window)

Our EZPublish content management system (CMS) uses the XiTi cookie to measure traffic. Our service provider is AT Internet. This company stores data (IPs, date and time of access, length of the visit and pages viewed) for six months.

Our EZPublish content management system (CMS) does not use this type of cookie.

For more information about the cookies we use, contact INRA’s Data Protection Officer by email at or by post at:

24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

Menu Logo Principal

Home page

PEARL, the aquatic experimentation facility at Rennes - Le Rheu

Indoor facilities

The indoor facilities, totalling 800 m2, comprise some 15 rooms, for the technical side (laboratory, offices, workshops, boiler room etc.) and for experiments (controlled-climate rooms, lotic channels, artificial spawning beds, etc.). Some are used for producing and maintaining model organisms – fish such as shad, lamprey, eel and juvenile salmonids, invertebrates such as shrimp, daphnia and chironomids, and also algae, plants, etc. Other rooms are multifunctional and can be fitted out to meet specific needs, e.g. for experiments involving xenobiotics or species classed as invasive.

Expérimentations en milieux contrôlés
Crucian carp farming

The greenhouses

The greenhouses, totalling 250 m2, are used for experiments or for animal or plant production.

Expérimentations en milieux contrôlés

The mesocosms

PEARL has a set of about 100 ponds, ranging in size from 0.5 m3 to 30m3, in which aquatic ecosystems of various degrees of complexity are reproduced. They are used for studying ecosystem functioning and the impact of anthropic or non-anthropic forcing factors in lentic environments. Part of the array is organised for ecotoxicology experiments.
All the ponds are outdoors and subject to local variations in temperature, precipitation etc. All can be adapted to the design defined by the body sponsoring the experiment.

This array of mesocosms has few equivalents in France and many multidisciplinary programmes make use of our facilities and scientific skills. We are in contact with the Centre de Recherche en Écologie Expérimentale et Prédictive in Île-de-France (CEREEP, Experimental and predictive ecology research centre), which has developed the same kind of tools in recent years, and the Total research and development centre in Mont-Lacq (Pyrénées-Atlantiques), which has lotic systems.

PEARL outdoor ponds
PEARL outdoor ponds

The ponds at Le Rheu 

PEARL also has about 30 ponds at Le Rheu, ranging between 100 m² and 1000 m². They are used for studies of pond ecosystem functioning, research on pond aquaculture, agro-ecology etc., or for keeping model organisms such as Crucian carp, pike, eel and shad.

Le Rheu PEARL ponds
Le Rheu PEARL troughs