T. Chevallier results 9
· Newest (Page 1/1, per page 25)
Author: T. Chevallier ×Clear All Filters
Search Results
Marine megafauna species are affected by a wide range of anthropogenic threats. To evaluate the risk of such threats, species’ vulnerability to each threat must first be determined. We build on the existing threats classification scheme and ranking system of the International Union for Conservation of Nature (IUCN) Red List of Threatened Species by assessing the vulnerability of 256 marine megafauna species to 23 at‐sea threat...
Evidence of backcross inviability and mitochondrial DNA paternal leakage in sea turtle hybridsNARA Subscribed
Hybridization is known to be part of many species' evolutionary history. Sea turtles have a fascinating hybridization system in which species separated by as much as 43 million years are still capable of hybridizing. Indeed, the largest nesting populations in Brazil of loggerheads ( Caretta caretta ) and hawksbills ( Eretmochelys imbricata ) have a high incidence of hybrids between these two species. A third species, olive rid...
Oral Microcystin-LR Does Not Cause Hepatotoxicity in Pigs: Is the Risk of Microcystin-LR Overestimated?NARA Subscribed
The global increase of toxin-producing cyanobacteria poses a serious risk to humans. Many investigations have shown that the cyanotoxin microcystin-LR induces hepatotoxicity in rodents. However, many of these studies applied the toxin intraperitoneally or used high oral concentrations, leading to an unrealistically high bioavailability of the toxin. Such approaches have put into question how these results translate to human ex...
Mineral nitrogen cycling through earthworm casts in a grazed pasture under elevated atmospheric CO 2NARA Subscribed
We used the New Zealand grazed pasture free air CO 2 enrichment experiment to determine the effects of elevated CO 2 on earthworm ( Aporrectodea caliginosa and Lumbricus rubellus ) cast production and mineral nitrogen (N) concentration over a 5‐week period in the spring. Elevated CO 2 did not affect earthworm biomass or the amount of cast material produced. However, cast mineral N concentrations were 18% lower, resulting in 27...
Habitat specialist species are supposed to be more susceptible to variations in local environmental characteristics than generalists. To test this hypothesis, we conducted a comparative analysis on abundance and genetic diversity of forest carabids differing in their habitat requirements. Four species were sampled in forests characterized by abiotic, landscape and biotic environmental variables. A statistical framework based o...
Previous1Next