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https://www.readbyqxmd.com/read/28231704/genetic-correlations-between-behavioural-responses-and-performance-traits-in-laying-hens
#1
Iwona Rozempolska-Rucińska, Grzegorz Zięba, Lucyna Kibała, Tomasz Paweł Próchniak, Marek Łukaszewicz
The aim of the study was to evaluate genetic correlations between the behavioural profile and performance in laying hens as an indirect answer to the question whether the observed behavioural responses are associated with increased levels of stress in these birds. The assessment of birds' temperament was carried out using the Novel Objects Test. The behavioural test was conducted in two successive generations comprising 9483 Rhode Island White birds (approx. 4700 individuals per generation) and 4326 Rhode Island Red birds (approx...
February 23, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28231694/exterior-egg-quality-as-affected-by-enrichment-resources-layout-in-furnished-laying-hen-cages
#2
Xiang Li, Donghua Chen, Fanyu Meng, Yingying Su, Lisha Wang, Runxiang Zhang, Jianhong Li, Jun Bao
Objective: This study aimed to investigate the effects of enrichment resources (a perch, dustbath and nest) layout in furnished laying-hen cages (FC) on exterior quality of eggs. Methods: One hundred and sixty-eight (168) Hy-Line Brown laying hens at 16 weeks of age were randomly distributed to four treatments: small furnished cages (SFC), medium furnished cages type I (MFC-I), medium furnished cages type II (MFC-II), and medium furnished cages type III (MFC-III)...
February 23, 2017: Asian-Australasian Journal of Animal Sciences
https://www.readbyqxmd.com/read/28231637/preen-oil-and-bird-fitness-a-critical-review-of-the-evidence
#3
Gregorio Moreno-Rueda
The uropygial gland is a holocrine complex exclusive to birds that produces an oleaginous secretion (preen oil) whose function is still debated. Herein, I examine critically the evidence for the many hypotheses of potential functions of this gland. The main conclusion is that our understanding of this gland is still in its infancy. Even for functions that are considered valid by most researchers, real evidence is scarce. Although it seems clear that preen oil contributes to plumage maintenance, we do not know whether this is due to a role in reducing mechanical abrasion or in reducing feather degradation by keratinophilic organisms...
February 23, 2017: Biological Reviews of the Cambridge Philosophical Society
https://www.readbyqxmd.com/read/28231316/a-balanced-solution-to-the-cumulative-threat-of-industrialized-wind-farm-development-on-cinereous-vultures-aegypius-monachus-in-south-eastern-europe
#4
Dimitris P Vasilakis, D Philip Whitfield, Vassiliki Kati
Wind farm development can combat climate change but may also threaten bird populations' persistence through collision with wind turbine blades if such development is improperly planned strategically and cumulatively. Such improper planning may often occur. Numerous wind farms are planned in a region hosting the only cinereous vulture population in south-eastern Europe. We combined range use modelling and a Collision Risk Model (CRM) to predict the cumulative collision mortality for cinereous vulture under all operating and proposed wind farms...
2017: PloS One
https://www.readbyqxmd.com/read/28230353/statistical-survey-of-persistent-organic-pollutants-risk-estimations-to-humans-and-wildlife-though-consumption-of-fish-from-u-s-rivers
#5
Angela L Batt, John B Wathen, James M Lazorchak, Anthony R Olsen, Thomas M Kincaid
U.S. EPA conducted a national statistical survey of fish tissue contamination at 540 river sites (representing 82 954 river km) in 2008-2009, and analyzed samples for 50 persistent organic pollutants (POPs), including 21 PCB congeners, 8 PBDE congeners, and 21 organochlorine pesticides. The survey results were used to provide national estimates of contamination for these POPs. PCBs were the most abundant, being measured in 93.5% of samples. Summed concentrations of the 21 PCB congeners had a national weighted mean of 32...
February 23, 2017: Environmental Science & Technology
https://www.readbyqxmd.com/read/28230246/functional-and-evolutionary-consequences-of-cranial-fenestration-in-birds
#6
Sander W S Gussekloo, Michael A Berthaume, Daniel R Pulaski, Irene Westbroek, Jan H Waarsing, Robin Heinen, Ian R Grosse, Elizabeth R Dumont
Ostrich-like birds (Palaeognathae) show very little taxonomic diversity while their sister taxon (Neognathae) contains roughly 10000 species. The main anatomical differences between the two taxa are in the crania. Palaeognaths lack an element in the bill called the lateral bar that is present in both ancestral theropods and modern neognaths, have thin zones in the bones of the bill, and robust bony elements on the ventral surface of their crania. Here we use a combination of modelling and developmental experiments to investigate the processes that might have led to these differences...
February 23, 2017: Evolution; International Journal of Organic Evolution
https://www.readbyqxmd.com/read/28230180/assessment-of-chicken-carcass-microbiome-responses-during-processing-in-the-presence-of-commercial-antimicrobials-using-a-next-generation-sequencing-approach
#7
Sun Ae Kim, Si Hong Park, Sang In Lee, Casey M Owens, Steven C Ricke
The purpose of this study was to 1) identify microbial compositional changes on chicken carcasses during processing, 2) determine the antimicrobial efficacy of peracetic acid (PAA) and Amplon (blend of sulfuric acid and sodium sulfate) at a poultry processing pilot plant scale, and 3) compare microbial communities between chicken carcass rinsates and recovered bacteria from media. Birds were collected from each processing step and rinsates were applied to estimate aerobic plate count (APC) and Campylobacter as well as Salmonella prevalence...
February 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28229973/female-conspecifics-restore-rhythmic-singing-behaviour-in-arrhythmic-male-zebra-finches
#8
Neelu Anand Jha, Vinod Kumar
The present study investigated whether pairing with a conspecific female would restore rhythmicity in the singing behaviour of arrhythmic male songbirds. We recorded the singing and, as the circadian response indicator, monitored the activity-rest pattern in male zebra finches (Taeniopygia guttata) housed without or with a conspecific female under 12 h light: 12 h darkness (12L:12D) or constant bright light (LL bright). Both unpaired and paired birds exhibited a significant daily rhythm in the singing and activity behaviour, but paired birds, under 12L:12D, showed a ~2 h extension in the evening...
March 2017: Journal of Biosciences
https://www.readbyqxmd.com/read/28228180/age-related-oxidative-stress-and-antioxidant-capacity-in-heat-stressed-broilers
#9
A P Del Vesco, A S Khatlab, E S R Goes, K S Utsunomiya, J S Vieira, A R Oliveira Neto, E Gasparino
We aimed to evaluate the effects of acute heat stress (HS) and age on the redox state in broilers aged 21 and 42 days. We evaluated the expression of genes related to antioxidant capacity, the production of hydrogen peroxide (H2O2), and the activity of antioxidant enzymes in the liver, as well as oxidative stress markers in the liver and plasma. The experiment had a completely randomized factorial design with two thermal environments (thermoneutral and HS, 38°C for 24 h) and two ages (21 and 42 days). Twenty-one-day-old animals exposed to HS showed the highest thioredoxin reductase 1 (TrxR1) (P<0...
February 23, 2017: Animal: An International Journal of Animal Bioscience
https://www.readbyqxmd.com/read/28226476/ultrasound-characterization-of-interface-oscillation-as-a-proxy-for-ventriculoperitoneal-shunt-function
#10
April Joy C Aralar, Matthew D Bird, Robert D Graham, Beomseo Koo, Mahesh B Shenai, Parag V Chitnis, Siddhartha Sikdar, April Joy C Aralar, Matthew D Bird, Robert D Graham, Beomseo Koo, Mahesh B Shenai, Parag V Chitnis, Siddhartha Sikdar, Mahesh B Shenai, Beomseo Koo, Robert D Graham, Matthew D Bird, Siddhartha Sikdar, Parag V Chitnis, April Joy C Aralar
Hydrocephalus, where cerebrospinal fluid (CSF) production rate is greater than reabsorption rate, leads to impaired neurological function if left untreated. Ventriculoperitoneal shunts (VPS) are implanted in the brain ventricles to route CSF. VPS systems have a high failure rate, and failure symptoms resemble symptoms of common maladies. The current gold standard for shunt diagnosis, surgical intervention, poses high risk and requires an expensive procedure for patients. Current non-invasive methods lack proper insight to assist physicians...
August 2016: Conference Proceedings: Annual International Conference of the IEEE Engineering in Medicine and Biology Society
https://www.readbyqxmd.com/read/28225817/binational-climate-change-vulnerability-assessment-of-migratory-birds-in-the-great-lakes-basins-tools-and-impediments
#11
Robert S Rempel, Megan L Hornseth
Climate change is a global concern, requiring international strategies to reduce emissions, however, climate change vulnerability assessments are often local in scope with assessment areas restricted to jurisdictional boundaries. In our study we explored tools and impediments to understanding and responding to the effects of climate change on vulnerability of migratory birds from a binational perspective. We apply and assess the utility of a Climate Change Vulnerability Index on 3 focal species using distribution or niche modeling frameworks...
2017: PloS One
https://www.readbyqxmd.com/read/28225774/environmental-characteristics-drive-variation-in-amazonian-understorey-bird-assemblages
#12
Juliana Menger, William E Magnusson, Marti J Anderson, Martin Schlegel, Guy Pe'er, Klaus Henle
Tropical bird assemblages display patterns of high alpha and beta diversity and, as tropical birds exhibit strong habitat specificity, their spatial distributions are generally assumed to be driven primarily by environmental heterogeneity and interspecific interactions. However, spatial distributions of some Amazonian forest birds are also often restricted by large rivers and other large-scale topographic features, suggesting that dispersal limitation may also play a role in driving species' turnover. In this study, we evaluated the effects of environmental characteristics, topographic and spatial variables on variation in local assemblage structure and diversity of birds in an old-growth forest in central Amazonia...
2017: PloS One
https://www.readbyqxmd.com/read/28225037/the-scaling-and-allometry-of-organ-size-associated-with-miniaturization-in-insects-a-case-study-for-coleoptera-and-hymenoptera
#13
Alexey A Polilov, Anastasia A Makarova
The study of the influence of body size on structure in animals, as well as scaling of organs, is one of the key areas of functional and evolutionary morphology of organisms. Most studies in this area treated mammals or birds; comparatively few studies are available on other groups of animals. Insects, because of the huge range of their body sizes and because of their colossal diversity, should be included in the discussion of the problem of scaling and allometry in animals, but to date they remain insufficiently studied...
February 22, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28224277/energy-metabolism-during-endurance-flight-and-the-post-flight-recovery-phase
#14
REVIEW
Susanne Jenni-Eiermann
Migrating birds are known to fly non-stop for thousands of kilometres without food or water intake and at a high metabolic rate thereby relying on energy stores which were built up preceding a flight bout. Hence, from a physiological point of view the metabolism of a migrant has to switch between an active fasting phase during flight and a fuelling phase during stopover. To meet the energetic and water requirements of endurance flight, migratory birds have to store an optimal fuel composition and they have to be able to quickly mobilize and deliver sufficient energy to the working flight muscles...
February 21, 2017: Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology
https://www.readbyqxmd.com/read/28223917/gene-expression-profiling-in-the-injured-spinal-cord-of-trachemys-scripta-elegans-an-amniote-with-self-repair-capabilities
#15
Adrián Valentin-Kahan, Gabriela B García-Tejedor, Carlos Robello, Omar Trujillo-Cenóz, Raúl E Russo, Fernando Alvarez-Valin
Slider turtles are the only known amniotes with self-repair mechanisms of the spinal cord that lead to substantial functional recovery. Their strategic phylogenetic position makes them a relevant model to investigate the peculiar genetic programs that allow anatomical reconnection in some vertebrate groups but are absent in others. Here, we analyze the gene expression profile of the response to spinal cord injury (SCI) in the turtle Trachemys scripta elegans. We found that this response comprises more than 1000 genes affecting diverse functions: reaction to ischemic insult, extracellular matrix re-organization, cell proliferation and death, immune response, and inflammation...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28223058/human-prevalence-of-the-spotted-fever-group-sfg-rickettsiae-in-endemic-zones-of-northwestern-colombia
#16
Andrés F Londoño, Leidy Y Acevedo-Gutiérrez, Diana Marín, Verónica Contreras, Francisco J Díaz, Gustavo Valbuena, Marcelo B Labruna, Marylin Hidalgo, Margarita Arboleda, Salim Mattar, Sergio Solari, Juan D Rodas
In February 2006, an outbreak of human rickettsiosis occurred in the municipality of Necoclí Colombia, with 35% of lethality. This episode was, followed by two more, one in the municipality of Los Cordobas in 2007 with a 54% of lethality and the other one in the municipality of Turbo in 2008 with 27% of lethality. The aim of this study was to perform serological tests in healthy persons to determine the seroprevalence of antibodies against spotted fever group (SFG) rickettsiae and develop a survey to study some infection risk-related factors...
February 9, 2017: Ticks and Tick-borne Diseases
https://www.readbyqxmd.com/read/28222925/linking-national-wood-consumption-with-global-biodiversity-and-ecosystem-service-losses
#17
Abhishek Chaudhary, L Roman Carrasco, Thomas Kastner
Identifying the global hotspots of forestry driven species, ecosystem services losses and informing the consuming nations of their environmental footprint domestically and abroad is essential to design demand side interventions and induce sustainable production methods. Here we first use countryside species area relationship model to project species extinctions of four vertebrate taxa (mammals, birds, amphibians and reptiles) due to forest land use in 174 countries. We combine the projected extinctions with a global database on the monetary value of ecosystem services provided by different biomes and with bilateral trade data of wood products to calculate species extinctions and ecosystem services losses inflicted by national wood consumption and international wood trade...
February 17, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28222765/new-h6-influenza-virus-reassortment-strains-isolated-from-anser-fabalis-in-anhui-province-china
#18
Ye Ge, Hongliang Chai, Zhiqiang Fan, Xianfu Wang, Qiucheng Yao, Jian Ma, Si Chen, Yuping Hua, Guohua Deng, Hualan Chen
BACKGROUND: H6 subtype avian influenza viruses are globally distributed and, in recent years, have been isolated with increasing frequency from both domestic and wild bird species as well as infected humans. Many reports have examined the viruses in the context of poultry or several wild bird species, but there is less information regarding their presence in migratory birds. METHODS: Hemagglutination and hemagglutination inhibition tests were used to measure HA activity for different HA subtypes...
February 21, 2017: Virology Journal
https://www.readbyqxmd.com/read/28222764/occurrence-of-salmonella-spp-a-comparison-between-indoor-and-outdoor-housing-of-broilers-and-laying-hens
#19
Martin Wierup, Helene Wahlström, Elina Lahti, Helena Eriksson, Désirée S Jansson, Åsa Odelros, Linda Ernholm
BACKGROUND: Outdoor production of poultry is rapidly increasing, which could be associated with increased risks for exposure to different environmental sources of Salmonella. We report a comparison on the occurrence of Salmonella during 2007-2015 in broilers and laying hens in outdoor and indoor production subjected to the same requirements for the prevention and control of Salmonella as applied in Sweden. RESULTS: Our results give no indication that, during the period studied, the exposure to Salmonella in outdoor poultry production was higher than in the indoor production...
February 21, 2017: Acta Veterinaria Scandinavica
https://www.readbyqxmd.com/read/28222368/direct-and-label-free-influenza-virus-detection-based-on-multisite-binding-to-sialic-acid-receptors
#20
Yukichi Horiguchi, Tatsuro Goda, Akira Matsumoto, Hiroaki Takeuchi, Shoji Yamaoka, Yuji Miyahara
A system to discriminate human or avian influenza A remains a highly sought-after tool for prevention of influenza pandemics in humans. Selective binding of the influenza A viral hemagglutinin (HA) to specific sialic acid (SA) receptors (Neu5Acα(2-6)Gal in humans, Neu5Acα(2-3)Gal in birds) is determined by the genotype of the HA and neuraminidase (NA) segments, making it one of the key characteristics that distinguishes human or avian influenza A virus. Here we demonstrate the direct detection of whole H1N1 influenza A virus using 6'-sialyllactose (Neu5Acα(2-6)Galβ(1-4)Glc, 6SL)-immobilized gold electrodes as biosensing surfaces...
February 16, 2017: Biosensors & Bioelectronics
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