Search results for "ECOSYSTEMS"
showing 10 items of 283 documents
Restauration de la connectivité écologique : proposition méthodologique pour une localisation optimisée des passages à faune
2017
National audience
Évaluation de l'impact potentiel d'une infrastructure sur la connectivité des mares
2017
National audience
Quantifier la contribution des espaces verts d'entreprise aux connectivités écologiques d'Île-de-France
2017
International audience
Genetic variation in the primary sex ratio in populations of the intertidal copepod, Tigriopus californicus, is widespread on Vancouver Island.
2011
Hypothesis: Genetic variation for the primary sex ratio is widespread in a copepodwith polygenic sex determination. Cytoplasmic sex ratio distorters (e.g. Wolbachia andmicrosporidians) influence the primary sex ratio in this copepod. Organism: The intertidal copepod, Tigriopus californicus; six populations from VancouverIsland, British Columbia. Study site: Quantitative genetics experiment in the laboratory. PCR and antibioticsexperiment to test for the presence of cytoplasmic sex ratio distorters. Results: Genetic variation for the primary sex ratio was found in five of the six populationssurveyed. The primary sex ratio was paternally transmitted. There was no evidence thatWolbachia or mic…
Création et réhabilitation de passages à faune favorables à plusieurs espèces : cas d'étude dans le Grésivaudan
2017
International audience
Graphab. 14 réalisations à découvrir. Actes de la journée "Retour d’expérience sur Graphab" du 27 juin 2017
2018
International audience
Host manipulation of a freshwater crustacean (Gammarus roeseli) by an acanthocephalan parasite (Polymorphus minutus) in a biological invasion context.
2006
8 pages; International audience; Several gammarid species serve as intermediate hosts for the acanthocephalan parasite Polymorphus minutus. This parasite influences gammarid behaviour in order to favour transmission to its ultimate host, generally a bird. We investigated this host manipulation in Gammarus roeseli, a gammarid species introduced in France 150 years ago which now coexists with several exotic species from different origins. In the field, vertical distribution of G. roeseli revealed a higher proportion of infected individuals close to the water's surface and the size distribution of infected gammarids revealed predation pressure on infected individuals. However, under laboratory…
Kerguelen, un observatoire scientifique dans le Grand Sud.
2018
8 pages; National audience
Conclusions: Present and Future of Southern Ocean Biogeography.
2014
7 pages; International audience
Biogeographic processes in the Southern Ocean.
2014
8 pages; International audience