Comparing species richness in sister clades that differ in a character is one of the ways to study factors influencing diversification. While most of its applications focused on traits that increase diversification, some were used to study the association of a trait with less species richness, e.g. the occurrence of dioecy in flowering plants. We show here, using simulations and an analytical model, that the null expectation of equal species richness that is generally used...
Despite an increasingly vast literature on cophylogenetic reconstructions for studying host-parasite associations, understanding the common evolutionary history of such systems remains a problem that is far from being solved. Most algorithms for host-parasite reconciliation use an event-based model, where the events include in general (a subset of) cospeciation, duplication, loss, and host switch. All known parsimonious event-based methods then assign a cost to each type of event in order to find a reconstruction of minimum...
Data from: Early life expenditure in sexual competition is associated with increased reproductive senescence in male red deerJean-François Lemaître, Jean-Michel Gaillard, Josephine M. Pemberton, Tim H. Clutton-Brock, Daniel H. Nussey, J.-F. Lemaitre & J.-M. Gaillard
The evolutionary theories of senescence predict that investment in reproduction in early life should come at the cost of reduced somatic maintenance, and thus earlier or more rapid senescence. There is now growing support for such trade-offs in wild vertebrates, but these exclusively come from females. Here, we test this prediction in male red deer (Cervus elaphus) using detailed longitudinal data collected over a 40-year field study. We show that males which had larger harems...
Data from: Demographic processes shaping genetic variation of the solitarious phase of the desert locustMarie-Pierre Chapuis, Christophe Plantamp, Laurence Blondin, Christine Pagès, Jean-Michel Vassal & Michel Lecoq
Between plagues, the solitarious desert locust (Schistocerca gregaria) is generally thought to exist as small populations, which are particularly prone to extinction events in arid regions of Africa and Asia. Given the high genetic structuring observed in one geographical area (the Eritrean coast) by former authors, a metapopulation dynamics model involving repeated extinction and colonization events was favored. In this study, we assessed the validity of a demographic scenario involving temporary populations of the solitarious...
Data from: The dual nature of hemocyanin in the establishment and persistence of the squid-vibrio symbiosisNatacha Kremer, Julia Schwartzman, René Augustin, Lawrence Zhou, Edward G. Ruby, Stéphane Hourdez & Margaret J. McFall-Ngai
We identified and sequenced from the squid Euprymna scolopes two isoforms of haemocyanin that share the common structural/physiological characteristics of haemocyanin from a closely related cephalopod, Sepia officinalis, including a pronounced Bohr effect. We examined the potential roles for haemocyanin in the animal's symbiosis with the luminous bacterium Vibrio fischeri. Our data demonstrate that, as in other cephalopods, the haemocyanin is primarily synthesized in the gills. It transits through the general circulation into other tissues...
Data from: Revisiting the link between breeding effort and oxidative balance through field evaluation of two sympatric sibling insect speciesBenjamin Rey, Pierre-François Pélisson, Marie-Claude Bel-Venner, Yann Voituron & Samuel Venner
The idea that oxidative stress could be a major force governing evolutionary trade-offs has recently been challenged by experimental approaches in laboratory conditions triggering extensive debates centered on theoretical and methodological issues. Here, we revisited the link between oxidative stress and reproduction by measuring multiple antioxidant and oxidative damages in wild-caught females of two sibling weevil species (Curculio elephas, C. glandium). The strength of our study arises from: (1) studied species are sympatric and exploit...
University of Lyon System6
French National Centre for Scientific Research2
Inria Grenoble - Rhône-Alpes research centre1
University of Cambridge1
University of Edinburgh1
University of Wisconsin-Madison1
University of the Witwatersrand1
Biometry and Evolutionary Biology Laboratory1
Centre de Coopération Internationale en Recherche Agronomique pour le Développement1