Jean-Michel Gaillard

Dec 3, 2024 | besjournals.onlinelibrary.wiley.com | Roberto Salguero-Gómez |Darren Evans |Jean-Michel Gaillard |Lesley T. Lancaster

1 WHAT ARE ECOLOGICAL CONCEPTS, AND WHY ARE THEY IMPORTANT? Concepts are abstract ideas that describe processes of interest. As such, concepts are the backbone to theories in any science. Concepts and theories are related in that novel theories cannot emerge without the existence of the solid concepts that underpin them.

Dec 2, 2024 | onlinelibrary.wiley.com | Harman Jaggi |Wenyun Zuo |Rosemarie Kentie |Jean-Michel Gaillard

References , , and . 2010. “Tradeoffs and Negative Correlations in Evolutionary Ecology.” Evolution Since Darwin: The First 150: 243–268. , , , , , and . 2016. “The Effects of Asymmetric Competition on the Life History of Trinidadian Guppies.” Ecology Letters 19, no. 3: 268–278. , , , and . 2013. “Experimental Evidence for Density-Dependent Regulation and Selection on Trinidadian Guppy Life Histories.” American Naturalist 181, no. 1: 25–38. , and . 1991.

Nov 18, 2024 | biorxiv.org | Ivett Pipoly |Veronika Bókony |Jean-Michel Gaillard |Jean-François Lemaître

AbstractSex chromosomes determine male and female phenotypes, and the resulting sex differences can have significant impacts on ecology and life history. One manifestation of this link is that ZZ/ZW sex-determination systems are associated with more male-skewed adult sex ratio (ASR, proportion of males in the adult population) than XY/XX systems across tetrapods (amphibians, reptiles, birds, and mammals).

Apr 22, 2024 | biorxiv.org | Jean-Michel Gaillard |Petter Kjellander |Aidan Jonathan Mark Hewison |Nadege Bonnot

AbstractIn most polygynous vertebrates, males must allocate energy to growing secondary sexual characteristics, such as ornaments or weapons, that they require to attract and defend potential mates, impacting body condition and potentially entailing fitness costs. We investigated sex differences in over winter body mass change across five intensively monitored populations of roe deer (Capreolus capreolus) with markedly contrasting environmental conditions.

Apr 2, 2024 | besjournals.onlinelibrary.wiley.com | Nathan Sanders |Roberto Salguero-Gómez |Darren Evans |Jean-Michel Gaillard

We want to start by acknowledging that 2023 was a tough year for many of us in many ways, as well as the billions of people who have likely never heard of the Journal of Animal Ecology. Against the backdrop of recent tragedies, throughout 2023, Journal of Animal Ecology has continued to publish the best fundamental research in animal ecology to underpin understanding and protecting species and their natural settings.