Results 21 to 30 of about 487 (213)
Communication in the third dimension: song perch height of rivals affects singing response in nightingales. [PDF]
PLoS ONE, 2012 Many animals use long-range signals to compete over mates and resources. Optimal transmission can be achieved by choosing efficient signals, or by choosing adequate signalling perches and song posts. High signalling perches benefit sound transmission and
Philipp Sprau +3 more
doaj +1 more source
Scansorial Landing and Perching [PDF]
, 2011 We describe an approach whereby small unmanned aircraft can land and perch on outdoor walls. Our prototype uses an ultrasonic sensor to initiate a pitch-up maneuver as it flies toward a wall. As it begins to stall, it contacts the wall with compliant “feet” equipped with rows of miniature spines that engage asperities on the surface.
Alexis Lussier Desbiens +2 more
openaire +1 more source
Poultry Science, 2021 Early chick environment, such as provision of litter and perches, can be a predictor of laying hen welfare. Inadequate or nonpreferred litter and perch types could have similar negative effects as those seen when not providing these resources at an early
Lena Skånberg +2 more
doaj +1 more source
General Behaviors and Perching Behaviors of Laying Hens in Cages with Different Colored Perches [PDF]
Asian-Australasian Journal of Animal Sciences, 2012 Color is one of the perch properties. This study was conducted to investigate the general behaviors and perching behaviors in laying hens under different group size (stocking density), and to understand the perch color (black, white or brown) preference ...
D. H. Chen, J. Bao
doaj +1 more source
Perch selection of three species of kingfishers at the Pantanal of Brazil
Animal Biodiversity and Conservation, 2023 Selecting a suitable perch can offer many benefits for fish–eating birds such as kingfishers. However, factors affecting perch selection in these species remain poorly studied.
L. C. Peinado, Z. Ortega
doaj +1 more source
Influence of Perch-Provision Timing on Anxiety and Fearfulness in Laying Hens
Animals, 2023 Perches can enhance laying hen welfare, but their effectiveness might be age-dependent. We investigated early and late perch access effects on anxiety and fear in pullets through attention bias (AB) and tonic immobility (TI) tests. Pullets (n = 728) were
Mallory G. Anderson +3 more
doaj +1 more source
Advanced Science, EarlyView.LRRK2‐mutant induced pluripotent stem cells (iPSCs) were derived from a patient with Parkinson's disease (PD). Using CRISPR/Cas9–mediated gene editing, the pathogenic LRRK2 mutations were precisely corrected, and isogenic dopaminergic neural progenitor cells (DA‐NPCs) were subsequently generated.
Qing Yan +29 more
wiley +1 more source
Developing appropriate environmental enrichment strategies for broiler breeders
Scientific ReportsThere is a recognised need for environmental enrichment strategies to be developed for broiler parent stock. We evaluated the use and tested preferences for three forms of enrichment in commercial broiler breeder housing: (1) perches (platform perches ...
Mary Baxter, Niamh E. O’Connell
doaj +1 more source
The Journal of Poultry Science, 2015 The effect of hay bales and perches as environmental enrichment material was investigated on the behavior, heterophil/lymphocyte (H/L) ratio, footpad dermatitis (FPD), and productivity of Japanese broilers in a commercial farm.
Ai Ohara +4 more
doaj +1 more source