Results 151 to 160 of about 841,035 (344)

Failed landings after laying hen flight in a commercial aviary over two flock cycles.

Poultry Science, 2016
Many egg producers are adopting alternative housing systems such as aviaries that provide hens a tiered cage and a litter-covered open floor area. This larger, more complex environment permits expression of behaviors not seen in space-limited cages, such
D. Campbell, S. Goodwin, M. Makagon, J. Swanson, J. Siegford   +4 more
semanticscholar   +1 more source

Assessing habitat suitability for black grouse broods at the bioregional scale

Wildlife Biology, EarlyView.
The black grouse Lyrurus tetrix, a galliform species emblematic of the European Alps, is currently threatened by habitat change, particularly given the closure of heathland linked to the rising tree line at higher altitudes. The presence of heathlands in good ecological condition is, however, imperative for the species' reproduction.
Alexandre T. M. Defossez, Samuel Alleaume, Marc Montadert, Josselin Giffard‐Carlet, Dino Ienco, Nadia Guiffant, Sandra Luque   +6 more
wiley   +1 more source

Effect of hen age, environmental temperature, and oviposition time on egg shell quality and egg shell and serum mineral contents in laying and broiler breeder hens

, 2018
The aim of the study was to evaluate egg shell quality characteristics, mineral content in the egg shell, and serum mineral concentration during the egg formation process as influenced by oviposition time and ambient temperature at the beginning and end ...
E. Tůmová, R. Gous, N. Tyler
semanticscholar   +1 more source

Thermal Environment, Ammonia Concentrations, and Ammonia Emissions of Aviary Houses with White Laying Hens [PDF]

, 2013
Maintaining comfortable thermal environments and good indoor air quality is essential to ensuring optimal production performance, welfare, and health of animals.
Hayes, Morgan, Li, Hong, Shepherd, Timothy, Stinn, John, Xin, Hongwei, Xin, Hongwei, Zhao, Yang   +6 more
core   +2 more sources

Nests in trees are as good as or better than cliffs for two formerly persecuted, primarily cliff nesting eagles in Spain: a cautionary tale in defining the habitat of range‐restricted or threatened species

Wildlife Biology, EarlyView.
In the late‐20th century, golden and Bonelli's eagles suffered population declines on the Iberian Peninsula, partly due to human persecution. Habitat assessments – especially for Bonelli's eagles – always found or assumed strong associations with cliffs that provided nesting sites.
Ryan Baumbusch, Jesus Bautista, Jose Rafael Garrido, Ian Newton, Miguel Ferrer, Virginia Morandini   +5 more
wiley   +1 more source

Ongoing increase in autochthonous Salmonella Enteritidis infections, the Netherlands, June 2023 to June 2025

Eurosurveillance
Salmonella Enteritidis (SE) cases in humans have increased in the Netherlands, from an annual average of 281 (2017–2019) to 427 in 2023, 401 in 2024 and 209 in 2025 (January–June).
Eelco Franz
doaj   +1 more source

Ethologische Untersuchungen zum Mauserumtrieb im Biolandbau [PDF]

, 2005
A longer life for laying hens is desired from an ethical point of view. Not only because the hens can be used for a longer period but also less male chicks would have to be killed at the age of one day.
Hirt, Helen, Zeltner, Esther
core  

Spectromicroscopy Analysis of Chicken Egg Shells

X-Ray Spectrometry, EarlyView.
ABSTRACT Chicken egg shells, taken from farm and backyard eggs of different suppliers from different regions in Brazil were collected for chemical/structural analysis, in order to try to find if there is a relation between egg shells composition and the type of production (farm or backyard), the egg shell color and the region of production.
Mariana Muniz Delgado Lopes, Sandy Gonzalez Hernandez, Luana Estefani Knaul, Rodrigo Leonardo de Oliveira Basso, Marcelo G. Hönnicke   +4 more
wiley   +1 more source

Haltungsbedingungen, Leistung und Gesundheit von gängigen Legehennen-Genotypen in Öko- und Freilandhaltungen in Frankreich, der Schweiz und den Niederlanden [PDF]

, 2015
In Switzerland, France and The Netherlands 257 farmers keeping free ranging laying hens (organic and conventional) were interviewed with regard to genotype of the hens, management conditions and performance.
Bestman, Monique, Leenstra, Ferry, Maurer, Veronika, van Sambeek, Frans   +3 more
core  

Environmental Total Factor Productivity and the Cost‐Effectiveness of GHG Emission Reduction: The Case of Crop Production in China

Australian Journal of Agricultural and Resource Economics, EarlyView.
ABSTRACT China's diversified agricultural policies have effectively improved both the yield and environmental performance of the crop sector. Quantifying productivity trends and their drivers is key to formulating strategies for high‐quality and low‐carbon crop development.
Yang Liu, Maria Vrachioli, Johannes Sauer   +2 more
wiley   +1 more source