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https://www.readbyqxmd.com/read/29776372/curation-of-microarray-oligonucleotides-and-corresponding-ests-cdnas-used-for-gene-expression-analysis-in-zebra-finches
#1
Peter V Lovell, Nicole A Huizinga, Abel Getachew, Brianna Mees, Samantha R Friedrich, Morgan Wirthlin, Claudio V Mello
OBJECTIVES: Zebra finches are a major model organism for investigating mechanisms of vocal learning, a trait that enables spoken language in humans. The development of cDNA collections with expressed sequence tags (ESTs) and microarrays has allowed for extensive molecular characterizations of circuitry underlying vocal learning and production. However, poor database curation can lead to errors in transcriptome and bioinformatics analyses, limiting the impact of these resources. Here we used genomic alignments and synteny analysis for orthology verification to curate and reannotate ~ 35% of the oligonucleotides and corresponding ESTs/cDNAs that make-up Agilent microarrays for gene expression analysis in finches...
May 18, 2018: BMC Research Notes
https://www.readbyqxmd.com/read/29766666/light-at-night-disrupts-nocturnal-rest-and-elevates-glucocorticoids-at-cool-color-temperatures
#2
Valentina J Alaasam, Richard Duncan, Stefania Casagrande, Scott Davies, Abhijaat Sidher, Brett Seymoure, Yantao Shen, Yong Zhang, Jenny Q Ouyang
Nighttime light pollution is quickly becoming a pervasive, global concern. Since the invention and proliferation of light-emitting diodes (LED), it has become common for consumers to select from a range of color temperatures of light with varying spectra. Yet, the biological impacts of these different spectra on organisms remain unclear. We tested if nighttime illumination of LEDs, at two commercially available color temperatures (3000 and 5000 K) and at ecologically relevant illumination levels affected body condition, food intake, locomotor activity, and glucocorticoid levels in zebra finches (Taeniopygia guttata)...
May 15, 2018: Journal of Experimental Zoology. Part A, Ecological and Integrative Physiology
https://www.readbyqxmd.com/read/29766379/relative-salience-of-syllable-structure-and-syllable-order-in-zebra-finch-song
#3
Shelby L Lawson, Adam R Fishbein, Nora H Prior, Gregory F Ball, Robert J Dooling
There is a rich history of behavioral and neurobiological research focused on the 'syntax' of birdsong as a model for human language and complex auditory perception. Zebra finches are one of the most widely studied songbird species in this area of investigation. As they produce song syllables in a fixed sequence, it is reasonable to assume that adult zebra finches are also sensitive to the order of syllables within their song; however, results from electrophysiological and behavioral studies provide somewhat mixed evidence on exactly how sensitive zebra finches are to syllable order as compared, say, to syllable structure...
May 15, 2018: Animal Cognition
https://www.readbyqxmd.com/read/29764973/a-complex-mtor-response-in-habituation-paradigms-for-a-social-signal-in-adult-songbirds
#4
Somayeh Ahmadiantehrani, Elisa O Gores, Sarah E London
Nonassociative learning is considered simple because it depends on presentation of a single stimulus, but it likely reflects complex molecular signaling. To advance understanding of the molecular mechanisms of one form of nonassociative learning, habituation, for ethologically relevant signals we examined song recognition learning in adult zebra finches. These colonial songbirds learn the unique song of individuals, which helps establish and maintain mate and other social bonds, and informs appropriate behavioral interactions with specific birds...
June 2018: Learning & Memory
https://www.readbyqxmd.com/read/29752978/factors-that-influence-the-onset-of-parental-care-in-zebra-finches-roles-for-egg-stimuli-and-prolactin
#5
Kristina O Smiley, Elizabeth Adkins-Regan
Parental care is a critical component for determining reproductive success both for a current set of offspring but also over the lifetime of the individual. The hormone prolactin has often been implicated as a parental care hormone across taxa but causal relationships have only been strongly demonstrated in mammals and few select species of birds. For instance, in mammals, maternal care towards foster pups can be induced by exogenous treatment with prolactin, in concert with other reproductive hormones involved in pregnancy...
May 9, 2018: Behavioural Processes
https://www.readbyqxmd.com/read/29731307/discovery-of-the-first-germline-restricted-gene-by-subtractive-transcriptomic-analysis-in-the-zebra-finch-taeniopygia-guttata
#6
Michelle K Biederman, Megan M Nelson, Kathryn C Asalone, Alyssa L Pedersen, Colin J Saldanha, John R Bracht
Developmentally programmed genome rearrangements are rare in vertebrates, but have been reported in scattered lineages including the bandicoot, hagfish, lamprey, and zebra finch (Taeniopygia guttata) [1]. In the finch, a well-studied animal model for neuroendocrinology and vocal learning [2], one such programmed genome rearrangement involves a germline-restricted chromosome, or GRC, which is found in germlines of both sexes but eliminated from mature sperm [3, 4]. Transmitted only through the oocyte, it displays uniparental female-driven inheritance, and early in embryonic development is apparently eliminated from all somatic tissue in both sexes [3, 4]...
April 28, 2018: Current Biology: CB
https://www.readbyqxmd.com/read/29720411/epigenetic-regulation-of-transcriptional-plasticity-associated-with-developmental-song-learning
#7
Theresa K Kelly, Somayeh Ahmadiantehrani, Adam Blattler, Sarah E London
Ethologists discovered over 100 years ago that some lifelong behavioural patterns were acquired exclusively during restricted developmental phases called critical periods (CPs). Developmental song learning in zebra finches is one of the most striking examples of a CP for complex learned behaviour. After post-hatch day 65, whether or not a juvenile male can memorize the song of a 'tutor' depends on his experiences in the month prior. If he experienced a tutor, he can no longer learn, but if he has been isolated from hearing a tutor the learning period is extended...
May 16, 2018: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/29720195/characterization-of-plasmodium-relictum-a-cosmopolitan-agent-of-avian-malaria
#8
Gediminas Valkiūnas, Mikas Ilgūnas, Dovilė Bukauskaitė, Karin Fragner, Herbert Weissenböck, Carter T Atkinson, Tatjana A Iezhova
BACKGROUND: Microscopic research has shown that Plasmodium relictum is the most common agent of avian malaria. Recent molecular studies confirmed this conclusion and identified several mtDNA lineages, suggesting the existence of significant intra-species genetic variation or cryptic speciation. Most identified lineages have a broad range of hosts and geographical distribution. Here, a rare new lineage of P. relictum was reported and information about biological characters of different lineages of this pathogen was reviewed, suggesting issues for future research...
May 2, 2018: Malaria Journal
https://www.readbyqxmd.com/read/29687960/bidirectional-scaling-of-vocal-variability-by-an-avian-cortico-basal-ganglia-circuit
#9
Jonathan B Heston, Joseph Simon, Nancy F Day, Melissa J Coleman, Stephanie A White
Behavioral variability is thought to be critical for trial and error learning, but where such motor exploration is generated in the central nervous system is unclear. The zebra finch songbird species offers a highly appropriate model in which to address this question. The male song is amenable to detailed measurements of variability, while the brain contains an identified cortico-basal ganglia loop that underlies this behavior. We used pharmacogenetic interventions to separately interrogate cortical and basal ganglia nodes of zebra finch song control circuitry...
April 2018: Physiological Reports
https://www.readbyqxmd.com/read/29685219/high-prevalence-of-mycobacterium-genavense-within-flocks-of-pet-birds
#10
A Schmitz, R Korbel, S Thiel, B Wörle, C Gohl, M Rinder
Mycobacterium genavense is regarded as the primary cause of mycobacteriosis in psittaciform and passeriform birds, which are commonly kept as pets. In humans, Mycobacterium genavense is especially pathogenic for young, old, pregnant and immunocompromised people (YOPIs). In birds, only few studies, mainly case reports, exist and there is still little e information about occurrence and relevance of this zoonotic pathogen. In this first pilot study concerning the prevalence of Mycobacterium genavense within flocks of naturally infected pet birds, real-time PCR examinations of 170 individual passeriform and psittaciform birds, including commonly kept budgerigars, lovebirds and zebra finches as well as gold finches and weaver finches, were conducted to determine the infection rate in six different aviaries...
May 2018: Veterinary Microbiology
https://www.readbyqxmd.com/read/29675990/intracranial-administration-of-the-g-protein-coupled-estrogen-receptor-1-antagonist-g-15-selectively-affects-dimorphic-characteristics-of-the-song-system-in-zebra-finches-taeniopygia-guttata
#11
Mahtab Attarhaie Tehrani, Sean L Veney
In zebra finches (Taeniopygia guttata), estradiol contributes to sexual differentiation of the song system but the receptor(s) underlying its action are not exactly known. Whereas mRNA and/or protein for nuclear estrogen receptors ERα and ERβ are minimally expressed, G-protein coupled estrogen receptor 1 (GPER1) has a much greater distribution within neural song regions and the syrinx. At present, however, it is unclear if this receptor contributes to dimorphic development of the song system. To test this, the specific GPER1 antagonist, G-15, was intracranially administered to zebra finches for 25 days beginning on the day of hatching...
April 20, 2018: Developmental Neurobiology
https://www.readbyqxmd.com/read/29675841/early-life-conditions-that-impact-song-learning-in-male-zebra-finches-also-impact-neural-and-behavioral-responses-to-song-in-females
#12
Kendra B Sewall, Rindy C Anderson, Jill A Soha, Susan Peters, Stephen Nowicki
Early life stressors can impair song in songbirds by negatively impacting brain development and subsequent learning. Even in species in which only males sing, early life stressors might also impact female behavior and its underlying neural mechanisms, but fewer studies have examined this possibility. We manipulated brood size in zebra finches to simultaneously examine the effects of developmental stress on male song learning and female behavioral and neural response to song. Although adult male HVC volume was unaffected, we found that males from larger broods imitated tutor song less accurately...
April 20, 2018: Developmental Neurobiology
https://www.readbyqxmd.com/read/29670131/acoustic-fine-structure-may-encode-biologically-relevant-information-for-zebra-finches
#13
Nora H Prior, Edward Smith, Shelby Lawson, Gregory F Ball, Robert J Dooling
The ability to discriminate changes in the fine structure of complex sounds is well developed in birds. However, the precise limit of this discrimination ability and how it is used in the context of natural communication remains unclear. Here we describe natural variability in acoustic fine structure of male and female zebra finch calls. Results from psychoacoustic experiments demonstrate that zebra finches are able to discriminate extremely small differences in fine structure, which are on the order of the variation in acoustic fine structure that is present in their vocal signals...
April 18, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29663559/sex-differences-in-hippocampal-mineralocorticoid-and-glucocorticoid-receptor-mrna-expression-in-response-to-acute-mate-pair-separation-in-zebra-finches-taeniopygia-guttata
#14
Farrah N Madison, Andrew J Kesner, Beau A Alward, Gregory F Ball
Mate separation has been shown to mediate changes in physiological and behavioral processes via activation of the hypothalamo-pituitary-adrenal (HPA) axis in both mammalian and avian species. In order to elucidate the neural mechanisms associated with changes in the HPA axis in response to social stress, we investigated the effects of mate pair separation on circulating corticosterone concentrations as well as gene expression levels of mineralocorticoid receptor (MR), glucocorticoid receptor (GR), and corticotropin releasing hormone (CRH) in the hypothalamus and hippocampus of both male and female zebra finches, a species that forms strong pair bonds...
April 16, 2018: Hippocampus
https://www.readbyqxmd.com/read/29656094/social-interaction-with-a-tutor-modulates-responsiveness-of-specific-auditory-neurons-in-juvenile-zebra-finches
#15
Shin Yanagihara, Yoko Yazaki-Sugiyama
Behavioral states of animals, such as observing the behavior of a conspecific, modify signal perception and/or sensations that influence state-dependent higher cognitive behavior, such as learning. Recent studies have shown that neuronal responsiveness to sensory signals is modified when animals are engaged in social interactions with others or in locomotor activities. However, how these changes produce state-dependent differences in higher cognitive function is still largely unknown. Zebra finches, which have served as the premier songbird model, learn to sing from early auditory experiences with tutors...
April 12, 2018: Behavioural Processes
https://www.readbyqxmd.com/read/29614959/the-constitutive-differential-transcriptome-of-a-brain-circuit-for-vocal-learning
#16
Peter V Lovell, Nicole A Huizinga, Samantha R Friedrich, Morgan Wirthlin, Claudio V Mello
BACKGROUND: The ability to imitate the vocalizations of other organisms, a trait known as vocal learning, is shared by only a few organisms, including humans, where it subserves the acquisition of speech and language, and 3 groups of birds. In songbirds, vocal learning requires the coordinated activity of a set of specialized brain nuclei referred to as the song control system. Recent efforts have revealed some of the genes that are expressed in these vocal nuclei, however a thorough characterization of the transcriptional specializations of this system is still missing...
April 3, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29614290/vocal-communication-decoding-sexy-songs
#17
Manfred Gahr
Male birds communicate sexual motivation via song performance, and receiving females might eventually respond to such 'ornaments'. A new study now shows that female zebra finches have a specialized higher order sensory (forebrain) region that preferably responds to the males' mating songs.
April 2, 2018: Current Biology: CB
https://www.readbyqxmd.com/read/29601855/egr-1-expression-in-catecholamine-synthesizing-neurons-reflects-auditory-learning-and-correlates-with-responses-in-auditory-processing-areas
#18
Jennifer B Dai, Yining Chen, Jon T Sakata
Distinguishing between familiar and unfamiliar individuals is an important task that shapes the expression of social behavior. As such, identifying the neural populations involved in processing and learning the sensory attributes of individuals is important for understanding mechanisms of behavior. Catecholamine-synthesizing neurons have been implicated in sensory processing, but relatively little is known about their contribution to auditory learning and processing across various vertebrate taxa. Here we investigated the extent to which immediate early gene expression in catecholaminergic circuitry reflects information about the familiarity of social signals and predicts immediate early gene expression in sensory processing areas in songbirds...
March 27, 2018: Neuroscience
https://www.readbyqxmd.com/read/29593652/11%C3%AE-hsd-types-1-and-2-in-the-songbird-brain
#19
Michelle A Rensel, Jessica A Ding, Devaleena S Pradhan, Barney A Schlinger
Glucocorticoid (GC) hormones act on the brain to regulate diverse functions, from behavior and homeostasis to the activity of the hypothalamic-pituitary-adrenal axis. Local regeneration and metabolism of GCs can occur in target tissues through the actions of the 11β-hydroxysteroid dehydrogenases [11 beta-hydroxysteroid dehydrogenase type 1 (11β-HSD1) and 11 beta-hydroxysteroid dehydrogenase type 2 (11β-HSD2), respectively] to regulate access to GC receptors. Songbirds have become especially important model organisms for studies of stress hormone action; however, there has been little focus on neural GC metabolism...
2018: Frontiers in Endocrinology
https://www.readbyqxmd.com/read/29593090/expression-patterns-of-cryptochrome-genes-in-avian-retina-suggest-involvement-of-cry4-in-light-dependent-magnetoreception
#20
Atticus Pinzon-Rodriguez, Staffan Bensch, Rachel Muheim
The light-dependent magnetic compass of birds provides orientation information about the spatial alignment of the geomagnetic field. It is proposed to be located in the avian retina, and be mediated by a light-induced, biochemical radical-pair mechanism involving cryptochromes as putative receptor molecules. At the same time, cryptochromes are known for their role in the negative feedback loop in the circadian clock. We measured gene expression of Cry1, Cry2 and Cry4 in the retina, muscle and brain of zebra finches over the circadian day to assess whether they showed any circadian rhythmicity...
March 2018: Journal of the Royal Society, Interface
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