Buscar
Mostrando ítems 31-40 de 1206
Electrocution risk for the endangered Crowned Solitary Eagle and other birds in semiarid landscapes of central Argentina
(Cambridge University Press, 2017-06)
High mortality by electrocution has been suggested to be the main factor behind the reduction of several birds of prey populations across the world. Almost nothing is known, however, about the impact of power lines on this ...
Seed dispersal effectiveness by frugivorous birds: Identifying functional equivalent species in bird assemblages
(Science Reviews 2000 Ltd, 2019-08)
Seed dispersal by birds is a pivotal ecosystem function worldwide; yet, the rapid and ongoing global biodiversity loss poses a major threat to this essential ecosystem service. Seed dispersal effectiveness (SDE) is a key ...
Bird diversity along elevational gradients in the dry tropical Andes of northern Chile: the potential role of indigenous traditional agriculture
(2018)
Understanding diversity patterns along environmental gradients lies at the heart of community ecology. Previous studies have found variation in bird diversity and density along “natural” elevational gradients in the Tropical ...
Adrenocortical responses in Japanese quail classified by their permanence in proximity to either low or high density of conspecifics
(Poultry Science Association, 2018-06-19)
The density-related permanence test (DRP) is used to classify young birds (while in groups) according to their individual permanence in proximity to either a high or low density of conspecifics (HD or LD, respectively). ...
Effects of the density, aviary type, breed, and age on the behaviors of laying hens kept in cages
(2008-12-01)
An experiment was carried out in order to investigate the behaviors of laying hens due to the environmental factors of: density inside of the cage, aviary type, breed, and age. The experiment was configured as a factorial ...
Effects of the density, aviary type, breed, and age on the behaviors of laying hens kept in cages
(2008-12-01)
An experiment was carried out in order to investigate the behaviors of laying hens due to the environmental factors of: density inside of the cage, aviary type, breed, and age. The experiment was configured as a factorial ...
Interplay between the morphometry of the lungs and the mode of locomotion in birds and mammals
(2007)
We studied the lung diffusion parameters of two species of birds and two species of mammals to explore how structural and functional features may be paralleled by differences in life style or phylogenetic origin. We used ...
Risk factors associated with Chlamydia psittaci infections in psittacine birds
(Society for General MicrobiologyBerks, 2014-03)
Chlamydia psittaci is the etiological agent of chlamydiosis in birds, especially psittaciformes. The objective of the present study was to detect C. psittaci by means of semi-nested PCR (snPCR) among psittacine birds sold ...