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https://www.readbyqxmd.com/read/28724738/early-life-manipulations-of-vasopressin-family-peptides-alter-vocal-learning
#1
Nicole M Baran, Samantha C Peck, Tabitha H Kim, Michael H Goldstein, Elizabeth Adkins-Regan
Vocal learning from social partners is crucial for the successful development of communication in a wide range of species. Social interactions organize attention and enhance motivation to learn species-typical behaviour. However, the neurobiological mechanisms connecting social motivation and vocal learning are unknown. Using zebra finches (Taeniopygia guttata), a ubiquitous model for vocal learning, we show that manipulations of nonapeptide hormones in the vasopressin family (arginine vasotocin, AVT) early in development can promote or disrupt both song and social motivation...
July 26, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28722808/an-examination-of-the-effect-of-aerosolized-permanone-insecticide-on-zebra-finch-susceptibility-to-west-nile-virus
#2
Mark D Jankowski, Murray E Moore, Erik K Hofmeister
West Nile virus is primarily maintained cryptically primarily in avian (Passerine) populations where it is transmitted by Culex spp. mosquitoes. Mosquito control measures currently include physical activities to reduce mosquito breeding sites, the application of mosquito larvicides, or aerosolized insecticides to kill adults (adulticides) when arboviral diseases such as West Nile virus (WNV) or Zika virus are detected in mosquito populations. Organochlorine, organohosphorus, carbamate and pyrethroid insecticides are often used...
July 19, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28722762/rapid-depuration-of-mercury-in-songbirds-accelerated-by-feather-molt
#3
Margaret Whitney, Daniel Cristol
Mercury (Hg) is a ubiquitous environmental contaminant that affects avian reproduction and condition, in both aquatic and terrestrial species. Because Hg binds strongly to the keratin of growing feathers, molt is an important avenue for Hg elimination. We investigated the rate of depuration of Hg from songbird blood and organs (brain, kidney, liver, muscle) as a function of molt. We exposed 2 species of captive songbirds, European starling (Sturnus vulgaris) and zebra finch (Taeniopygia guttata), to environmentally relevant dietary Hg (1...
July 19, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28717221/individual-recognition-of-opposite-sex-vocalizations-in-the-zebra-finch
#4
Pietro B D'Amelio, Milena Klumb, Mauricio N Adreani, Manfred L Gahr, Andries Ter Maat
Individual vocal recognition plays an important role in the social lives of many vocally active species. In group-living songbirds the most common vocalizations during communal interactions are low-intensity, soft, unlearned calls. Being able to tell individuals apart solely from a short call would allow a sender to choose a specific group member to address, resulting in the possibility to form complex communication networks. However, little research has yet been carried out to discover whether soft calls contain individual identity...
July 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28694052/group-housing-during-adolescence-has-long-term-effects-on-the-adult-stress-response-in-female-but-not-male-zebra-finches-taeniopygia-guttata
#5
Michael G Emmerson, Karen A Spencer
Adolescent social interactions can have long-term effects on physiological responses to stressors in later-life. A larger adolescent group size can result in higher stressor-induced secretion of glucocorticoids in adulthood. The effect may be due to a socially-mediated modulation of gonadal hormones, e.g. testosterone. However, group size (number of animals) has been conflated with social density (space per animal). Therefore it is hard to determine the mechanisms through which adolescent group size can affect the stress response...
July 7, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/28684463/individual-variation-in-metabolic-reaction-norms-over-ambient-temperature-causes-low-correlation-between-basal-and-standard-metabolic-rate
#6
Michael Briga, Simon Verhulst
Basal metabolic rate (BMR) is often assumed to be indicative of the energy turnover at ambient temperatures (Ta) below the thermoneutral zone (SMR), but this assumption has remained largely untested. Using a new statistical approach, we quantified the consistency in nocturnal metabolic rate across a temperature range in zebra finches (n=3,213 measurements on 407 individuals) living permanently in eight outdoor aviaries. Foraging conditions were either benign or harsh, and body mass and mass-adjusted BMRm and SMRm were lower in individuals living in a harsh foraging environment...
July 6, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28681379/cortical-inter-hemispheric-circuits-for-multimodal-vocal-learning-in-songbirds
#7
Amy K Paterson, Sarah W Bottjer
Vocal learning in songbirds and humans is strongly influenced by social interactions based on sensory inputs from several modalities. Songbird vocal learning is mediated by cortico-basal ganglia circuits that include the SHELL region of LMAN (lateral magnocellular nucleus of the anterior nidopallium), but little is known concerning neural pathways that could integrate multimodal sensory information with SHELL circuitry. In addition, cortical pathways that mediate the precise coordination between hemispheres required for song production have been little studied...
July 6, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28680683/transcriptional-response-to-west-nile-virus-infection-in-the-zebra-finch-taeniopygia-guttata
#8
Daniel J Newhouse, Erik K Hofmeister, Christopher N Balakrishnan
West Nile virus (WNV) is a widespread arbovirus that imposes a significant cost to both human and wildlife health. WNV exists in a bird-mosquito transmission cycle in which passerine birds act as the primary reservoir host. As a public health concern, the mammalian immune response to WNV has been studied in detail. Little, however, is known about the avian immune response to WNV. Avian taxa show variable susceptibility to WNV and what drives this variation is unknown. Thus, to study the immune response to WNV in birds, we experimentally infected captive zebra finches (Taeniopygia guttata)...
June 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28617829/rhythmic-syllable-related-activity-in-a-songbird-motor-thalamic-nucleus-necessary-for-learned-vocalizations
#9
Husain H Danish, Dmitriy Aronov, Michale S Fee
Birdsong is a complex behavior that exhibits hierarchical organization. While the representation of singing behavior and its hierarchical organization has been studied in some detail in avian cortical premotor circuits, our understanding of the role of the thalamus in adult birdsong is incomplete. Using a combination of behavioral and electrophysiological studies, we seek to expand on earlier work showing that the thalamic nucleus Uvaeformis (Uva) is necessary for the production of stereotyped, adult song in zebra finch (Taeniopygia guttata)...
2017: PloS One
https://www.readbyqxmd.com/read/28606898/carotenoids-buffer-the-acute-phase-response-on-fever-sickness-behavior-and-rapid-bill-color-change-in-zebra-finches
#10
Deanna R Broughton, Brent C Schneider, Kevin J McGraw, Daniel R Ardia
Carotenoids are finite resources that animals can allocate to self-maintenance, attractiveness, or reproduction. Here we test how carotenoids affect the acute phase response (APR), an intense rapid systemic response characterized by fever, sickness behavior, and production of acute phase proteins, which serves to reduce pathogen persistence. We conducted a 2x2 factorial design experiment in captive adult male and female zebra finches (Taeniopygia guttata) to determine the effects of carotenoid supplementation on the intensity of the APR...
June 12, 2017: Journal of Experimental Biology
https://www.readbyqxmd.com/read/28576645/effects-of-developmental-conditions-on-glucocorticoid-concentrations-in-adulthood-depend-on-sex-and-foraging-conditions
#11
Blanca Jimeno, Michael Briga, Simon Verhulst, Michaela Hau
Developmental conditions in early life frequently have long-term consequences on the adult phenotype, but the adult environment can modulate such long-term effects. Glucocorticoid hormones may be instrumental in mediating developmental effects, but the permanency of such endocrine changes is still debated. Here, we manipulated environmental conditions during development (small vs. large brood size, and hence sibling competition) and in adulthood (easy vs. hard foraging conditions) in a full factorial design in zebra finches, and studied effects on baseline (Bas-CORT) and stress-induced (SI-CORT) corticosterone in adulthood...
June 9, 2017: Hormones and Behavior
https://www.readbyqxmd.com/read/28575175/central-administration-of-indomethacin-mitigates-the-injury-induced-upregulation-of-aromatase-expression-and-estradiol-content-in-the-zebra-finch-brain
#12
Alyssa L Pedersen, Jenna L Brownrout, Colin J Saldanha
Injury to the vertebrate brain causes neuroinflammation, characterized in part by increases in prostaglandins. In rodents and songbirds, brain injury also induces the transcription and translation of aromatase in reactive astrocytes around the site of damage. Interestingly, this induction is more rapid in female zebra finches relative to males. Induced aromatization is neuroprotective, as inhibition of aromatase and estrogen replacement, increases and decreases the extent of damage, respectively. While the consequences of induced astrocytic aromatization are intensely studied, little is known about what factor(s) induce aromatase...
June 1, 2017: Endocrinology
https://www.readbyqxmd.com/read/28547179/telomere-length-measurement-by-qpcr-in-birds-is-affected-by-storage-method-of-blood-samples
#13
Sophie Reichert, Hannah Froy, Winnie Boner, Theresa M Burg, Francis Daunt, Robert Gillespie, Kate Griffiths, Sue Lewis, Richard A Phillips, Dan H Nussey, Pat Monaghan
Given the potential role of telomeres as biomarkers of individual health and ageing, there is an increasing interest in studying telomere dynamics in a wider range of taxa in the fields of ecology and evolutionary biology. Measuring telomere length across the lifespan in wild animal systems is essential for testing these hypotheses, and may be aided by archived blood samples collected as part of longitudinal field studies. However, sample collection, storage, and DNA extraction methods may influence telomere length measurement, and it may, therefore, be difficult to balance consistency in sampling protocol with making the most of available samples...
June 2017: Oecologia
https://www.readbyqxmd.com/read/28544577/hatching-asynchrony-impacts-cognition-in-male-zebra-finches
#14
Simone A Campbell, Michelle L Beck, Kendra B Sewall
Conditions experienced early in life can shape brain development and later cognition. Altricial songbirds are particularly vulnerable to early environmental perturbations. Research on "Developmental Stress" in songbirds has addressed how early-life conditions may impair song learning and has been extended to consider other components of adult phenotype. Early-life challenges ranging from ectoparasites to competition with siblings have been shown to compromise song learning and other measures of cognition, as well as behavioral strategy...
May 23, 2017: Journal of Experimental Zoology. Part A, Ecological Genetics and Physiology
https://www.readbyqxmd.com/read/28543449/the-ascending-projections-of-the-nuclei-of-the-descending-trigeminal-tract-nttd-in-the-zebra-finch-taeniopygia-guttata
#15
Macarena Faunes, J Martin Wild
In our traditional view of the avian somatosensory system, input from the beak and head reaches the telencephalon via a disynaptic pathway, involving projections from the principal sensory nucleus (PrV) directly to nucleus basorostralis (previously called nucleus basalis), whereas input from the rest of the body follows a trisynatic pathway similar to that in mammals, involving projections from the dorsal column nuclei to the thalamus, and thence to somatosensory wulst. However, the role of the nuclei of the descending trigeminal tract (nTTD) in this scenario is unclear, partly because their ascending projections have been examined in only one species, the mallard duck...
May 23, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28542900/the-sensory-trigeminal-complex-and-the-organization-of-its-primary-afferents-in-the-zebra-finch-taeniopygia-guttata
#16
Macarena Faunes, J Martin Wild
Our knowledge of the avian sensory trigeminal system has been largely restricted to the principal trigeminal nucleus (PrV) and its ascending projections to the forebrain. Studies addressing the cytoarchitecture and organization of afferent input to the sensory trigeminal complex, which includes both the PrV and the nuclei of the descending trigeminal tract (nTTD), have only been performed in pigeons and ducks. Here we extend such an analysis to a songbird, the zebra finch (Taeniopygia guttata). We describe the cytoarchitecture of the sensory trigeminal complex, the patterns of calbindin-like and substance P-like immunoreactivity, and the organization of afferents from the three branches of the trigeminal nerve and from the lingual branch of the hypoglossal nerve...
May 24, 2017: Journal of Comparative Neurology
https://www.readbyqxmd.com/read/28539523/courtship-song-preferences-in-female-zebra-finches-are-shaped-by-developmental-auditory-experience
#17
Yining Chen, Oliver Clark, Sarah C Woolley
The performance of courtship signals provides information about the behavioural state and quality of the signaller, and females can use such information for social decision-making (e.g. mate choice). However, relatively little is known about the degree to which the perception of and preference for differences in motor performance are shaped by developmental experiences. Furthermore, the neural substrates that development could act upon to influence the processing of performance features remains largely unknown...
May 31, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28514229/an-open-source-wireless-capable-miniature-microscope-system
#18
William A Liberti, L Nathan Perkins, Daniel P Leman, Timothy J Gardner
OBJECTIVE: Fluorescence imaging through head-mounted microscopes in freely behaving animals is becoming a standard method to study neural circuit function. Flexible, open-source designs are needed to spur evolution of the method. APPROACH: We describe a miniature microscope for single-photon fluorescence imaging in freely behaving animals. The device is made from 3D printed parts and off-the-shelf components. These microscopes weigh less than 1.8 g, can be configured to image a variety of fluorophores, and can be used wirelessly or in conjunction with active commutators...
May 17, 2017: Journal of Neural Engineering
https://www.readbyqxmd.com/read/28507505/protein-protein-interaction-among-the-foxp-family-members-and-their-regulation-of-two-target-genes-vldlr-and-cntnap2-in-the-zebra-finch-song-system
#19
Ezequiel Mendoza, Constance Scharff
The Forkhead transcription factor FOXP2 is implicated in speech perception and production. The avian homolog, FoxP2 contributes to song learning and production in birds. In human cell lines, transcriptional activity of FOXP2 requires homo-dimerization or dimerization with paralogs FOXP1 or FOXP4. Whether FoxP dimerization occurs in the brain is unknown. We recently showed that FoxP1, FoxP2 and FoxP4 (FoxP1/2/4) proteins are co-expressed in neurons of Area X, a song control region in zebra finches. We now report on dimer- and oligomerization of zebra finch FoxPs and how this affects transcription...
2017: Frontiers in Molecular Neuroscience
https://www.readbyqxmd.com/read/28506621/zenk-expression-following-conspecific-and-heterospecific-playback-in-the-zebra-finch-auditory-forebrain
#20
Erin N Scully, Allison H Hahn, Kimberley A Campbell, Neil McMillan, Jenna V Congdon, Christopher B Sturdy
Zebra finches (Taeniopygia guttata) are sexually dimorphic songbirds, not only in appearance but also in vocal production: while males produce both calls and songs, females only produce calls. This dimorphism provides a means to contrast the auditory perception of vocalizations produced by songbird species of varying degrees of relatedness in a dimorphic species to that of a monomorphic species, species in which both males and females produce calls and songs (e.g., black-capped chickadees, Poecile atricapillus)...
May 12, 2017: Behavioural Brain Research
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