Non-ambiguous trees : new results and generalisation.

We present a new definition of non-ambiguous trees (NATs) as labelled binary trees. We thus get a differential equationwhose solution can be described combinatorially. This yields a new formula for the number of NATs. We also obtain q-versions of our formula. We finally generalise NATs to higher dimension

Non-ambiguous trees: new results and generalization

We present a new definition of non-ambiguous trees (NATs) as labelled binary trees. We thus get a differ- ential equation whose solution can be described combinatorially. This yield a new formula for the number of NATs. We also obtain q-versions of our formula. And we generalize NATs to higher dimension

Coordinates crayfish populations 2014

This file contains the names and geographic coordinates of crayfish populations sampled in 2014

Forte structuration génétique à fine échelle chez une espèce récemment introduite et hautement invasive

National audienc

Crayfish genotypes 2014

This file contains the genotypes of crayfish sampled in 2014 in a Genepop format

Fluctuating asymmetry

This file contains the morphological data used to detect fluctuating asymmetry in crayfish populations. Columns 1 to 3 describe the individual label, population and category. Columns 4 to 11 are morphological measurements of each segment (antennae, merus 1, merus 3, merus 4), for each side (L = left and R = right). Columns 12 to 15 are the difference between left and right measurements for each trait. Columns 16 to 19 are this difference corrected for size-dependence. Columns 20 to 37 are the genotypes of each individual. Column 38 is multilocus heterozygosity

Landscape map

This file is a map of the study area in raster format, with NA = terrestrial habitat; 1 = ponds; 2 = marsh; 3 = watercourse

Fins are relevant non-lethal surrogates for muscle to measure stable isotopes in amphibians

Stable isotope analyses (SIA) are now widely used in ecology research to quantify the trophic implications of a large range of ecological processes. Non-destructive sampling methods have been successfully developed for most vertebrates, but the validation of such methods is missing in amphibians. Filling this methodological gap is critical to reduce the significant lack of knowledge on the trophic ecology of this imperilled group. The relevance of tail fin as a surrogate for muscle, a tissue routinely used for SIA, was assessed in four amphibian species, including tadpoles and adult newts, by (1) testing the link between the isotope ratios of carbon and nitrogen in fin and muscle, and addressing the additional practical issues of (2) the effects of a topical anaesthetic on isotope ratios, and (3) the minimum quantities of fin needed for SIA to limit the severity of sampling. The isotope ratios were highly correlated between the two tissues in all four species. Equations were provided to predict muscle estimates from fin values for each species separately and grouped by their taxonomic order (anurans or urodeles), which represent a valuable solution for any other species. Topical anaesthetics had little influence on isotope ratios, and the surface of tail fin needed for SIA was small. We conclude that the tail fin of amphibians can be used as a non-lethal surrogate for muscle in SIA, and this offers promising prospects for research on the trophic ecology of amphibians, and potentially on their conservation

Fins are relevant non-lethal surrogates for muscle to measure stable isotopes in amphibians

Stable isotope analyses (SIA) are now widely used in ecology research to quantify the trophic implications of a large range of ecological processes. Non-destructive sampling methods have been successfully developed for most vertebrates, but the validation of such methods is missing in amphibians. Filling this methodological gap is critical to reduce the significant lack of knowledge on the trophic ecology of this imperilled group. The relevance of tail fin as a surrogate for muscle, a tissue routinely used for SIA, was assessed in four amphibian species, including tadpoles and adult newts, by (1) testing the link between the isotope ratios of carbon and nitrogen in fin and muscle, and addressing the additional practical issues of (2) the effects of a topical anaesthetic on isotope ratios, and (3) the minimum quantities of fin needed for SIA to limit the severity of sampling. The isotope ratios were highly correlated between the two tissues in all four species. Equations were provided to predict muscle estimates from fin values for each species separately and grouped by their taxonomic order (anurans or urodeles), which represent a valuable solution for any other species. Topical anaesthetics had little influence on isotope ratios, and the surface of tail fin needed for SIA was small. We conclude that the tail fin of amphibians can be used as a non-lethal surrogate for muscle in SIA, and this offers promising prospects for research on the trophic ecology of amphibians, and potentially on their conservation

Crayfish genotypes 2016

This file contains the genotypes of crayfish sampled in 2016, in Genepop format