{"id":43975,"date":"2026-09-26T17:53:00","date_gmt":"2026-09-26T15:53:00","guid":{"rendered":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/?p=43975"},"modified":"2026-09-26T18:17:15","modified_gmt":"2026-09-26T16:17:15","slug":"entretien-mathieu-pelissie-leffondrement-dun-stock-de-peche-est-parfois-irreversible","status":"publish","type":"post","link":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/2026\/09\/26\/entretien-mathieu-pelissie-leffondrement-dun-stock-de-peche-est-parfois-irreversible\/","title":{"rendered":"[Entretien] Mathieu P\u00e9lissi\u00e9 : \u00ab L\u2019effondrement d\u2019un stock de p\u00eache est parfois irr\u00e9versible \u00bb"},"content":{"rendered":"
\n

La Marseillaise :<\/b> Vous observez que, souvent, l\u2019effondrement d\u2019un stock de p\u00eache est pr\u00e9c\u00e9d\u00e9 d\u2019une baisse de sa productivit\u00e9 <\/a>\u2013 son taux de croissance en l\u2019absence de p\u00eache. Cela se produit en moyenne douze ans avant l\u2019effondrement. Est-ce un d\u00e9lai suffisant pour r\u00e9agir et inverser la tendance<\/b>\u00a0<\/b>?<\/b><\/p>\n

Mathieu P\u00e9lissi\u00e9<\/b>\u00a0<\/b>: <\/b>Difficile de l\u2019affirmer. Mais ce signal serait bon \u00e0 prendre pour essayer d\u2019\u00eatre plus r\u00e9actif afin d\u2019adapter la r\u00e9glementation. D\u2019autant plus avec l\u2019augmentation importante des temp\u00e9ratures ces derni\u00e8res ann\u00e9es.<\/p>\n

Pourquoi<\/b>\u00a0<\/b>?<\/b><\/p>\n

M.P.<\/b>\u00a0<\/b>:<\/b> Les baisses de productivit\u00e9 ont tendance \u00e0 se produire o\u00f9 l\u2019oc\u00e9an se r\u00e9chauffe le plus vite. Nous n\u2019\u00e9tablissons pas de lien de causalit\u00e9. Mais si un tel lien existe, il est permis de douter que la tendance puisse \u00eatre compl\u00e8tement invers\u00e9e. Nous aurons beau limiter l\u2019effort de p\u00eache, la temp\u00e9rature continuera d\u2019augmenter et les stocks continueront de diminuer. Nous n\u2019avons pas le recul suffisant pour l\u2019instant. Mais nous savons que l\u2019effondrement d\u2019un stock est parfois irr\u00e9versible.<\/p>\n

D\u2019autant que ces changements peuvent perturber durablement l\u2019\u00e9cosyst\u00e8me…<\/b><\/p>\n

M.P.<\/b>\u00a0<\/b>: <\/b>Exactement. C\u2019est le sujet sur lequel je travaille actuellement\u00a0: l\u2019impact de ces transitions abruptes sur les interactions au niveau de l\u2019\u00e9cosyst\u00e8me. Des esp\u00e8ces dominantes peuvent devenir \u00ab\u00a0domin\u00e9es\u00a0\u00bb, et inversement. Par exemple si une proie se nourrit des larves de son pr\u00e9dateur, et que celui-ci n\u2019est plus capable d\u2019en produire assez pour maintenir ses effectifs. Ces changements d\u2019interactions peuvent faire qu\u2019un \u00e9tat d\u00e9grad\u00e9 le reste.<\/p>\n<\/p><\/div>\n","protected":false},"excerpt":{"rendered":"La Marseillaise : Vous observez que, souvent, l’effondrement d’un stock de pêche est précédé d’une baisse de sa productivité – son taux de croissance en l’absence de pêche. Cela …","protected":false},"author":1,"featured_media":43976,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[333],"tags":[1434,2618,5779,2952,343,5864,239,240,284,3967,298,419,416,353,420,1395,988,2001],"news-destination":[],"news-source":[475],"is_homepage":[],"ta_other":[],"class_list":["post-43975","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-environnement","tag-ecologie","tag-ecosysteme","tag-ecosysteme-marins","tag-effondrement","tag-entretien","tag-faune-aquatique","tag-herault","tag-montpellier","tag-occitanie","tag-peche","tag-poissons","tag-rechauffement-climatique","tag-recherche-scientifique","tag-sciences","tag-scientifique","tag-temperatures","tag-week-end","tag-weekend","news-source-website"],"_links":{"self":[{"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/posts\/43975","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/comments?post=43975"}],"version-history":[{"count":1,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/posts\/43975\/revisions"}],"predecessor-version":[{"id":43977,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/posts\/43975\/revisions\/43977"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/media\/43976"}],"wp:attachment":[{"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/media?parent=43975"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/categories?post=43975"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/tags?post=43975"},{"taxonomy":"news-destination","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/news-destination?post=43975"},{"taxonomy":"news-source","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/news-source?post=43975"},{"taxonomy":"is_homepage","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/is_homepage?post=43975"},{"taxonomy":"ta_other","embeddable":true,"href":"https:\/\/euapp01.newsmemory.com\/lamarseillaise\/news\/wp-json\/wp\/v2\/ta_other?post=43975"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}