Search results for "Biodiversity and Ecology"
showing 10 items of 738 documents
Création et réhabilitation de passages à faune favorables à plusieurs espèces : cas d'étude dans le Grésivaudan
2017
International audience
Etude d’impact sur l’agriculture de la loi « biodiversité »
2017
National audience; De manière inéluctable, la loi pour la reconquête de la biodiversité emporte des incidences très variées sur le monde agricole, qui va devoir s’adapter à de nouvelles contraintes, mais aussi à des stratégies innovantes de protection de l’environnement dont il peut choisir d’être partie prenante.
Graphab. 14 réalisations à découvrir. Actes de la journée "Retour d’expérience sur Graphab" du 27 juin 2017
2018
International audience
Foreword for the thematic volume of the 8ISCPP. Recent advances in present and past cephalopod studies.
2012
3 pages, éditorial.; International audience
Un point sur la zone de contact entre les deux contrefaisants Hippolais icterina et Hippolais polyglotta.
2008
Le cas du Grand contrefaisant (Hippolais icterina) et du Petit contrefaisant (Hippolais polyglotta) en sympatrie représente un contexte de zone d’hybridation « mobile » particulièrement intéressant d’un point de vue écologique et évolutif. Les travaux de Camille Ferry ont apporté une somme de connaissances importante sur le contexte écologique et comportemental de la vie en sympatrie pour ces deux espèces et initié plusieurs recherches dédiées en particulier aux conséquences morphologiques et vocales de la coexistence sympatrique des deux contrefaisants. Ces recherches montrent notamment des modifications morphologiques chez H. icterina dans le sens d’une plus grande ressemblance avec H. po…
The next meeting for animal personality: population genetics.
2015
8 pages; International audience
Introduction. Ecological immunology.
2009
12 pages; International audience; An organism's fitness is critically reliant on its immune system to provide protection against parasites and pathogens. The structure of even simple immune systems is surprisingly complex and clearly will have been moulded by the organism's ecology. The aim of this review and the theme issue is to examine the role of different ecological factors on the evolution of immunity. Here, we will provide a general framework of the field by contextualizing the main ecological factors, including interactions with parasites, other types of biotic as well as abiotic interactions, intraspecific selective constraints (life-history trade-offs, sexual selection) and popula…
Manipulative parasites may not alter intermediate host distribution but still enhance their transmission: field evidence for increased vulnerability …
2013
SUMMARYBehavioural alterations induced by parasites in their intermediate hosts can spatially structure host populations, possibly resulting in enhanced trophic transmission to definitive hosts. However, such alterations may also increase intermediate host vulnerability to non-host predators. Parasite-induced behavioural alterations may thus vary between parasite species and depend on each parasite definitive host species. We studied the influence of infection with 2 acanthocephalan parasites (Echinorhynchus truttae and Polymorphus minutus) on the distribution of the amphipod Gammarus pulex in the field. Predator presence or absence and predator species, whether suitable definitive host or …
Parasite-induced alteration of plastic response to predation threat: increased refuge use but lower food intake in Gammarus pulex infected with the a…
2014
6 pages; International audience; Larvae of many trophically-transmitted parasites alter the behaviour of their intermediate host in ways that increase their probability of transmission to the next host in their life cycle. Before reaching a stage that is infective to the next host, parasite larvae may develop through several larval stages in the intermediate host that are not infective to the definitive host. Early predation at these stages results in parasite death, and it has recently been shown that non-infective larvae of some helminths decrease such risk by enhancing the anti-predator defences of the host, including decreased activity and increased sheltering. However, these behavioura…
Microsporidian disease of the invasive amphipod Dikerogammarus villosus and the potential for its transfer to local invertebrate fauna.
2012
12 pages; International audience; Invasive species may introduce novel pathogens to a colonised area. Most of the time emerging pathogens are detected a posteriori, but recognition of a priori emergence of an invasive disease by host shift may be useful for predictive purposes. Here, we studied if the microsporidian parasite Cucumispora dikerogammari infecting the invasive Ponto-Caspian amphipod Dikerogammarus villosus, has the potential to become an emergent disease in invaded rivers in Western and Central Europe. We first showed that this parasite decreases the survival of D. villosus in the later stages of infection development. However, the host reproduces earlier in response to the inf…