{"id":6702,"date":"2022-09-29T23:31:00","date_gmt":"2022-09-29T21:31:00","guid":{"rendered":"https:\/\/www.hdebalzac.fr\/?p=6702"},"modified":"2022-10-31T11:22:29","modified_gmt":"2022-10-31T10:22:29","slug":"les-eleves-du-lycee-honore-de-balzac-assistent-a-linventaire-annuel-des-poissons-du-lez-par-lofb","status":"publish","type":"post","link":"https:\/\/www.hdebalzac.fr\/index.php\/2022\/09\/29\/les-eleves-du-lycee-honore-de-balzac-assistent-a-linventaire-annuel-des-poissons-du-lez-par-lofb\/","title":{"rendered":"Les \u00e9l\u00e8ves du lyc\u00e9e Honor\u00e9 de Balzac assistent \u00e0 l\u2019inventaire annuel des poissons du Lez par l\u2019OFB"},"content":{"rendered":"\n

Le mercredi 21 septembre, les \u00e9l\u00e8ves de la classe de premi\u00e8re bac STAV \u00ab\u00a0sciences et technologies de l’agronomie et du vivant\u00a0\u00bb ont eu la chance d\u2019assister \u00e0 un \u00e9v\u00e8nement unique\u00a0: la s\u00e9lection d’un \u00e9chantillonnage des poissons du Lez par l\u2019OFB (Office Fran\u00e7ais de la Biodiversit\u00e9). Ils ont ainsi pu discuter avec les techniciens \u00e0 l\u2019\u0153uvre dans le cours d\u2019eau pour r\u00e9aliser une p\u00eache \u00e9lectrique, autoris\u00e9e et r\u00e9glement\u00e9e.<\/p>\n\n\n\n

Cette technique est le moyen le plus efficace pour d\u00e9nombrer les diff\u00e9rentes esp\u00e8ces de poissons pr\u00e9sentes dans le Lez sans leur nuire.<\/p>\n\n\n\n

Pour pratiquer cette p\u00eache sp\u00e9ciale, les techniciens ont des \u00e9quipements sp\u00e9ciaux : bottes et cuissardes, gants en caoutchouc, groupe \u00e9lectrog\u00e8ne, \u00e9lectrodes, \u00e9puisettes, bacs de collecte des poissons, appareils de mesure\u2026<\/p>\n\n\n\n

Ils envoient un courant \u00e9lectrique dans l\u2019eau qui provoque une narcose des poissons. Ces derniers remontent \u00e0 la surface o\u00f9 ils sont pr\u00e9lev\u00e9s \u00e0 l\u2019\u00e9puisette le temps de les mesurer, les peser et les identifier. Puis ils sont remis \u00e0 l\u2019eau. Les \u00e9l\u00e8ves qui ont appr\u00e9ci\u00e9 de pouvoir assister \u00e0 cette p\u00eache ont m\u00eame pu rel\u00e2cher eux m\u00eames les poissons : chevaines, gardons, goujons, ablettes et m\u00eame anguilles !<\/p>\n\n\n\n

Cet inventaire qui se fait tous les ans depuis 30 ans permet de suivre pr\u00e9cis\u00e9ment les diff\u00e9rentes populations piscicoles dans le Lez et savoir si elles se d\u00e9veloppent ou si elles ont tendance \u00e0 dispara\u00eetre d\u2019ann\u00e9e en ann\u00e9e. Ces suivis permettent ensuite de mettre en place des actions cibl\u00e9es de pr\u00e9servation de la biodiversit\u00e9 du Lez qui constitue notre patrimoine naturel indispensable \u00e0 la vie de notre territoire.<\/p>\n\n\n\n


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Article paru dans le Midi Libre<\/figcaption><\/figure>\n","protected":false},"excerpt":{"rendered":"

Le mercredi 21 septembre, les \u00e9l\u00e8ves de la classe de premi\u00e8re bac STAV \u00ab\u00a0sciences et technologies de l’agronomie et du vivant\u00a0\u00bb ont eu la chance d\u2019assister \u00e0 un \u00e9v\u00e8nement unique\u00a0: 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