Results 221 to 230 of about 661,416 (300)

Field test of assumptions for using line transect distance sampling on rock ptarmigan

open access: yesWildlife Biology, EarlyView.
Reliable population estimates are essential for the management of harvested species. Line transect distance sampling using pointing dogs is an established survey method for willow ptarmigan and has also been proposed for the monitoring of rock ptarmigan.
Marius Kjønsberg   +3 more
wiley   +1 more source

Variation in food availability affects the population age structure of Atlantic puffins Fratercula arctica in the Faroe Islands

open access: yesWildlife Biology, EarlyView.
Across their entire Atlantic breeding range, Atlantic puffins Fratercula arctica have experienced decreases in food availability, often leading to population declines. The species is one of the most numerous seabirds in Føroyar (the Faroe Islands, in English) but has faced apparent, unquantified population declines.
Anne N.M.A. Ausems   +3 more
wiley   +1 more source

The effect of simulated intergroup encounters on movement patterns and home range use in banded mongooses

open access: yesWildlife Biology, EarlyView.
Intergroup conflicts have a wide range of impacts, including affecting movement and ranging patterns. Previous studies found contrasting movement responses to intergroup conflicts, but no explanation for these differences has been suggested. However, these can be broadly grouped into ‘conflict avoidance' responses: avoiding areas close to the fight ...
Elizabeth F. R. Preston   +3 more
wiley   +1 more source

Structural insights into urocanate reductase using room‐temperature X‐ray crystallography

open access: yesActa Crystallographica Section D, EarlyView.
The active‐site dynamics of the microbial enzyme urocanate reductase were revealed by room‐temperature X‐ray crystallography.Urocanate reductase (UrdA) is a bacterial enzyme that converts urocanic acid to imidazole propionate. Its catalytic residue Arg411 undergoes a large conformational change in the substrate‐bound versus product‐bound states.
Swati Aggarwal   +4 more
wiley   +1 more source

Parasites alter host community structure in a natural experiment

open access: yesJournal of Animal Ecology, EarlyView.
Parasites can alter host communities in complex ways, but empirical data from natural systems are rare. This study decomposes the effects of an invasive parasite on natural communities of fish in Trinidad, revealing the direct, indirect, and context dependence of the invasion on host demographic rates and community structure.
Tomos Potter   +5 more
wiley   +1 more source

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