Showing papers by "Vincent Bretagnolle published in 2004"
TL;DR: A molecular phylogeny based on 917 base pairs of the mitochondrial (mt) DNA cytochrome-b gene was used to test and reassess the systematics and conflicting taxonomic treatments of the small, black-and-white Puffinus shearwaters, including the P. assimilis-lherminieri species complex.
Abstract: A molecular phylogeny based on 917 base pairs (bp) of the mitochondrial (mt) DNA cytochrome-b gene was used to test and reassess the systematics and conflicting taxonomic treatments of the small, black-and-white Puffinus shearwaters, including the P. assimilis-lherminieri species complex. Three geographically discrete clades were identified in the North Atlantic, Southern (Australasia) and tropical Pacific and Indian oceans that contain most of the P. assimilis-lherminieri taxa. Together with four other lineages (P. puffinus, P. opisthomelas, P. mauretanicus-P. yelkouan, P. newelli-P. myrtae), they form an unresolved polytomy. Puffinus huttoni-P. gavia, P. nativitatis, and P. subalaris are basal to this. The phylogenetic positions of P. myrtae and P. subalaris are unexpected and warrant further investigation. None of the competing taxonomic treatments of the P. assimilis-lherminieri complex are supported. Instead, our phylogeny suggests that 14 taxa should be recognized, whereas five others (loye...
71 citations
TL;DR: It is found that the release of two juveniles every other year for 12 years and the increase of fecundity due to selective food provisioning would reduce by more than one-half the current extinction risk of Corsican bearded vulture population.
32 citations
TL;DR: In this paper, the authors provided the first distribution maps and abundance estimates of seabirds wintering in the entire shelf of the Bay of Biscay, comparing their areas of highest density with the oil drift area, and proposing for the first time (although preliminarily) minimal abundance estimates for these birds in this area.
21 citations
01 Jan 2004
TL;DR: The authors analyzes des raisons du declin (80% des effectifs en 20 years) de l'Outarde canepetiere, Tetrax tetrax, en region Poitou-Charentes indique que la disparition progressive des systemes de polyculture-elevage dans cette region, mais aussi le fauchage precoce (en particulier des luzernes) qui detruit une partie des pontes, and le labour des prairies qui rarefie les disponib
Abstract: La deuxieme moitie du XX siecle a connu des evolutions extremement importantes et rapides, notamment dans l'usage des terres agricoles en Europe. Or les agro-ecosystemes, qui representent environ 60% de la surface europeenne, abritent une part importante de la biodiversite en general (50% des especes d'oiseaux par exemple). L'intensification de l'agriculture, qui s'est accompagnee entre autres de la regression des systemes prairiaux, a entraine un declin massif de nombreuses especes d'oiseaux. L'analyse des raisons du declin (80% des effectifs en 20 ans) de l'Outarde canepetiere, Tetrax tetrax, en region Poitou-Charentes indique que la disparition progressive des systemes de polyculture-elevage dans cette region, mais aussi le fauchage precoce (en particulier des luzernes) qui detruit une partie des pontes, et le labour des prairies qui rarefie les disponibilites alimentaires (criquets) pour les poussins de l'outarde en sont a l'origine.
4 citations