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https://www.readbyqxmd.com/read/29752753/phoretic-dispersal-influences-parasite-population-genetic-structure
#1
Emily DiBlasi, Kevin P Johnson, Sydney A Stringham, Angela N Hansen, Andrew B Beach, Dale H Clayton, Sarah E Bush
Dispersal is a fundamental component of the life history of most species. Dispersal influences fitness, population dynamics, gene flow, genetic drift, and population genetic structure. Even small differences in dispersal can alter ecological interactions and trigger an evolutionary cascade. Linking such ecological processes with evolutionary patterns is difficult, but can be done in the proper comparative context. Here we investigate how differences in phoretic dispersal influence the population genetic structure of two different parasites of the same host species...
May 12, 2018: Molecular Ecology
https://www.readbyqxmd.com/read/29703132/genomic-insights-into-natural-selection-in-the-common-loon-gavia-immer-evidence-for-aquatic-adaptation
#2
Zach G Gayk, Diana Le Duc, Jeffrey Horn, Alec R Lindsay
BACKGROUND: The common loon (Gavia immer) is one of five species that comprise the avian order Gaviiformes. Loons are specialized divers, reaching depths up to 60 m while staying submerged for intervals up to three minutes. In this study we used comparative genomics to investigate the genetic basis of the common loon adaptations to its ecological niche. We used Illumina short read DNA sequence data from a female bird to produce a draft assembly of the common loon (Gavia immer) genome...
April 27, 2018: BMC Evolutionary Biology
https://www.readbyqxmd.com/read/29686053/identification-of-a-transcriptionally-forward-%C3%AE-gene-and-two-%C3%AF-genes-within-the-pigeon-columba-livia-igh-gene-locus
#3
Tian Huang, Xifeng Wang, Run Si, Hao Chi, Binyue Han, Haitang Han, Gengsheng Cao, Yaofeng Zhao
Compared with mammals, the bird Ig genetic system relies on gene conversion to create an Ab repertoire, with inversion of the IgA-encoding gene and very few cases of Ig subclass diversification. Although gene conversion has been studied intensively, class-switch recombination, a mechanism by which the IgH C region is exchanged, has rarely been investigated in birds. In this study, based on the published genome of pigeon ( Columba livia ) and high-throughput transcriptome sequencing of immune-related tissues, we identified a transcriptionally forward α gene and found that the pigeon IgH gene locus is arranged as μ-α-υ1-υ2...
April 23, 2018: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/29554306/changes-in-hormone-profiles-growth-factors-and-mrna-expression-of-the-related-receptors-in-crop-tissue-relative-organ-weight-and-serum-biochemical-parameters-in-the-domestic-pigeon-columba-livia-during-incubation-and-chick-rearing-periods-under-artificial-farming
#4
P Xie, X P Wan, Z Bu, E J Diao, D Q Gong, X T Zou
The present study was conducted to determine the changes in concentrations of hormones and growth factors and their related receptor gene expressions in crop tissue, relative organ weight, and serum biochemical parameters in male and female pigeons during incubation and chick-rearing periods under artificial farming conditions. Seventy-eight pairs of 60-week-old White King pigeons with 2 fertile eggs per pair were randomly divided into 13 groups by different breeding stages. Serum prolactin and insulin-like growth factor-1 (IGF-1) concentrations in crop tissue homogenates were the highest in both male and female pigeons at 1 d of chick-rearing (R1), while epidermal growth factor (EGF) in female pigeons peaked at d 17 of incubation (I17) (P < 0...
March 15, 2018: Poultry Science
https://www.readbyqxmd.com/read/29519939/improved-genome-assembly-and-annotation-for-the-rock-pigeon-columba-livia
#5
Carson Holt, Michael Campbell, David A Keays, Nathaniel Edelman, Aurélie Kapusta, Emily Maclary, Eric T Domyan, Alexander Suh, Wesley C Warren, Mark Yandell, M Thomas P Gilbert, Michael D Shapiro
The domestic rock pigeon ( Columba livia ) is among the most widely distributed and phenotypically diverse avian species. C. livia is broadly studied in ecology, genetics, physiology, behavior, and evolutionary biology, and has recently emerged as a model for understanding the molecular basis of anatomical diversity, the magnetic sense, and other key aspects of avian biology. Here we report an update to the C. livia genome reference assembly and gene annotation dataset. Greatly increased scaffold lengths in the updated reference assembly, along with an updated annotation set, provide improved tools for evolutionary and functional genetic studies of the pigeon, and for comparative avian genomics in general...
May 4, 2018: G3: Genes—Genomes—Genetics
https://www.readbyqxmd.com/read/29378207/sex-biased-transcriptomic-response-of-the-reproductive-axis-to-stress
#6
Rebecca M Calisi, Suzanne H Austin, Andrew S Lang, Matthew D MacManes
Stress is a well-known cause of reproductive dysfunction in many species, including birds, rodents, and humans, though males and females may respond differently. A powerful way to investigate how stress affects reproduction is by examining its effects on a biological system essential for regulating reproduction, the hypothalamic-pituitary-gonadal (HPG) axis. Often this is done by observing how a stressor affects the amount of glucocorticoids, such as cortisol or corticosterone, circulating in the blood and their relationship with a handful of known HPG-producing reproductive hormones, like testosterone and estradiol...
March 20, 2018: Hormones and Behavior
https://www.readbyqxmd.com/read/29355612/new-record-of-ascaridia-nymphii-secernentea-ascaridiidae-from-macaw-parrot-ara-chloroptera-in-china
#7
Fang Yang, Pan Zhang, Xianli Shi, Kangxin Li, Minwei Wang, Yeqi Fu, Xinxin Yan, Jianxiong Hang, Guoqing Li
Present study was performed to identify the species of ascarids from macaw parrot, Ara chloroptera, in China. Total 6 ascarids (3 males and 3 females) were collected in the feces of 3 macaws at Guangzhou Zoo in Guangdong Province, China. Their morphological characteristics with dimensions were observed under a light microscope, and their genetic characters were analyzed with the partial 18S rDNA, ITS rDNA and nad4 gene sequences, respectively. Results showed that all worms have no interlabia but male worms have two alate spicules, well-developed precloacal sucker and a tail with ventrolateral caudal alae and 11 pairs of papillae...
June 2018: Parasitology International
https://www.readbyqxmd.com/read/29316210/fate-of-egg-proteins-during-the-development-of-columba-livia-domestica-embryo
#8
Seba Jamal Shbailat, Ibtisam Omar Aslan
The transfer of egg white into the yolk and consumption of yolk proteins by the embryo are largely unexplored in the pigeon Columba livia domestica. Here, we investigated the route of egg white transfer as well as the degradation and uptake of yolk proteins by the pigeon embryo. Initially, we tested the electrophoretic patterns of proteins in different egg compartments throughout development. Then, we used lysozyme as a reference protein to follow the egg white transfer, and we measured its activity using Micrococcus lysodeikticus as a substrate...
January 2018: Journal of Experimental Zoology. Part B, Molecular and Developmental Evolution
https://www.readbyqxmd.com/read/29297845/proteus-columbae-sp-nov-isolated-from-a-pigeon-in-ma-anshan-china
#9
Hang Dai, Yonglu Wang, Yujie Fang, Tao Xiao, Zhenzhou Huang, Biao Kan, Duochun Wang
A Gram-negative, facultatively anaerobic bacillus, strain 08MAS2615T , was isolated from the flesh of a pigeon specimen collected in Ma'anshan, Anhui province, China. Phylogenetic analysis of 16S rRNA gene sequences confirmed that strain 08MAS2615T belonged to the genus Proteus, and formed an independent branch which was clearly separated from the other six known species of Proteus. Strain 08MAS2615T was more closely related to Proteus vulgaris ATCC 29905T and Proteus penneri NCTC 12737T than other Proteus species...
February 2018: International Journal of Systematic and Evolutionary Microbiology
https://www.readbyqxmd.com/read/29258986/the-biological-function-of-pigeon-crop-milk-and-the-regulation-of-its-production
#10
REVIEW
Yi Luo, Xun Wang, Yao Ma, Xiao Kai Li
The pigeon (Columba livia) is one of the few birds capable of secreting nutrients to nourish squabs. During the incubation period, the crop of the parent pigeon will be thickened. When squabs are hatched, the crop milk will be secreted from the crop and fed to squabs. The nutritional benefits are similar between the pigeon crop milk and mammalian milk, and both of them are regulated by prolactin. Prolactin stimulates the proliferation of crop epithelial cells, which eventually slough to form the crop milk. Evidence suggests that the complex process may be associated with the transcription of the AnxIcp35 gene and the activation of JAK/STAT and Wnt signal pathways...
December 20, 2017: Yi Chuan, Hereditas
https://www.readbyqxmd.com/read/29207879/association-of-dgat2-gene-polymorphisms-with-carcass-and-meat-quality-traits-in-domestic-pigeons-columba-livia
#11
H G Mao, X Y Dong, H Y Cao, N Y Xu, Z Z Yin
1. Diacylglycerol acyltransferase (DGAT) plays an important role in the synthesis of triacylglycerol, but its effects on meat quality and carcass composition in pigeons are unclear. In this study, single-nucleotide polymorphisms (SNPs) in the exons of the DGAT2 gene were identified and analysed by using DNA sequencing methods in 200 domestic pigeons (Columba livia). The associations between DGAT2 polymorphisms and carcass and meat quality traits were also analysed. 2. Sequencing results showed that 5 nucleotide mutations were detected in exons 3, 4, 5 and 6 of the DGAT2 gene...
January 15, 2018: British Poultry Science
https://www.readbyqxmd.com/read/29024108/changes-in-hepatic-glucose-and-lipid-metabolism-related-parameters-in-domestic-pigeon-columba-livia-during-incubation-and-chick-rearing
#12
X P Wan, P Xie, Z Bu, X T Zou
This study aimed to evaluate the hepatic glucose and lipid metabolism-related parameters of adult male and female White King pigeons (Columba livia) during incubation and chick rearing. At day 4 (I4), 10 (I10) and 17 (I17) of incubation and day 1 (R1), 7 (R7), 15 (R15) and 25 (R25) of chick rearing, livers were sampled from six pigeons for each sex. Glycogen and fat contents, activities of glycolytic enzymes (hexokinase, HK; 6-phosphofructokinase, 6-PFK), and genes expressions of key enzymes involved in glycolysis (pyruvate kinase, PK; glucokinase, GK), gluconeogenesis (phosphoenolpyruvate carboxykinase cytosolic, PCK1; fructose-1,6-bisphosphatase, FBP1; glucose-6-phosphatase, G6Pase), fatty acid synthesis (fatty acid synthase, FAS; acetyl-CoA carboxylase, ACC) and fatty acid β-oxidation (carnitine palmitoyltransferase 1, CPT1; acyl-CoA 1, ACO) were measured...
April 2018: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28864154/novel-avian-oropharyngeal-trichomonads-isolated-from-european-turtle-doves-streptopelia-turtur-and-racing-pigeons-columba-livia-genetic-and-morphometric-characterisation-of-clonal-cultures
#13
M C Martínez-Herrero, M M Garijo-Toledo, D Liebhart, P Ganas, R A Martínez-Díaz, F Ponce-Gordo, A Carrero-Ruiz, M Hess, M T Gómez-Muñoz
Extensive diversity has been described within the avian oropharyngeal trichomonad complex in recent years. In this study we developed clonal cultures from four isolates selected by their different ITS1/5.8S/ITS2 (ITS) genotype and their association with gross lesions of avian trichomonosis. Isolates were obtained from an adult racing pigeon and a nestling of Eurasian eagle owl with macroscopic lesions, and from a juvenile wood pigeon and an European turtle dove without clinical signs. Multi-locus sequence typing analysis of the ITS, small subunit of ribosomal rRNA (SSUrRNA) and Fe-hydrogenase (Fe-hyd) genes together with a morphological study by optical and scanning electron microscopy was performed...
August 31, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28807284/first-description-of-cryptosporidium-parvum-in-carrier-pigeons-columba-livia
#14
Bruno César Miranda Oliveira, Elis Domingos Ferrari, Mariele Fernanda da Cruz Panegossi, Alex Akira Nakamura, Flávio Sader Corbucci, Walter Bertequini Nagata, Bianca Martins Dos Santos, Jancarlo Ferreira Gomes, Marcelo Vasconcelos Meireles, Giovanni Widmer, Katia Denise Saraiva Bresciani
The carrier pigeon and the domestic pigeon are different breeds of the species Columba livia. Carrier pigeons are used for recreational activities such as bird contests and exhibitions. Due to the close contact with humans, these birds may potentially represent a public health risk, since they can host and disseminate zoonotic parasites, such as those belonging to the genus Cryptosporidium (phylum Apicomplexa). The purpose of this work was the detection by microscopic and molecular techniques of Cryptosporidium spp...
August 30, 2017: Veterinary Parasitology
https://www.readbyqxmd.com/read/28752767/differential-expression-of-fatty-acid-transporters-and-fatty-acid-synthesis-related-genes-in-crop-tissues-of-male-and-female-pigeons-columba-livia-domestica-during-incubation-and-chick-rearing
#15
Peng Xie, Xue-Ping Wang, Zhu Bu, Xiao-Ting Zou
1. The growth performance of squabs reared solely by male or female parent pigeons was measured, and the changes of lipid content of crop milk and the expression profiles of genes potentially involved in lipid accumulation by crop tissues of parent pigeons were evaluated during incubation and chick rearing. 2. Squabs increased in body weight during 25 d of rearing, whereas both male and female pigeons lost weight after finishing rearing chicks, and the weight loss of male pigeons was significantly greater than that of female parent pigeons...
September 12, 2017: British Poultry Science
https://www.readbyqxmd.com/read/28495225/detection-and-molecular-status-of-isospora-sp-from-the-domestic-pigeon-columba-livia-domestica
#16
Ryuma Matsubara, Yasuhiro Fukuda, Fumi Murakoshi, Osamu Nomura, Toru Suzuki, Chika Tada, Yutaka Nakai
The domestic pigeon, Columba livia domestica, is reared for meat production, as a pet, or for racing. Few reports have characterized the parasitic protists from the genus Isospora isolated from Columbiformes. We detected Isospora-like oocysts from C. livia reared for racing. The oocyst contained two sporocysts, and each sporocyst included four sporozoites. The sporulated oocysts (n=4) were spherical; their mean diameters were 25.6 (24.0-27.2)×24.7 (23.4-26.0) μm. Micropyles, polar granules, and oocyst residuum were absent...
May 8, 2017: Parasitology International
https://www.readbyqxmd.com/read/28417958/widespread-patterns-of-sexually-dimorphic-gene-expression-in-an-avian-hypothalamic-pituitary-gonadal-hpg-axis
#17
Matthew D MacManes, Suzanne H Austin, Andrew S Lang, April Booth, Victoria Farrar, Rebecca M Calisi
The hypothalamic-pituitary-gonadal (HPG) axis is a key biological system required for reproduction and associated sexual behaviors to occur. In the avian reproductive model of the rock dove (Columba livia), we characterized the transcript community of each tissue of the HPG axis in both sexes, thereby significantly expanding our mechanistic insight into HPG activity. We report greater sex-biased differential expression in the pituitary as compared to the hypothalamus, with multiple genes more highly expressed in the male pituitary being related to secretory function, and multiple genes more highly expressed in the female pituitary being related to reproduction, growth, and development...
April 18, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28316429/pseudomalaria-in-a-domestic-pigeon-a-case-report
#18
B R Maharana, Binod Kumar
Microscopic examination of thin blood smear of a domestic pigeon brought to Teaching Veterinary Clinical Complex, Junagadh, Gujarat revealed mature and immature halter shaped gametocytes of Haemoproteus columbae encircling the nucleated erythrocytes. The disease was diagnosed as acute infection of pigeon malaria more notably known as pseudomalaria. The parasitic infection was further confirmed by polymerase chain reaction assay targeting the Cytochrome b ( cyt b ) gene fragment amplifying 207 base pair (bp) fragment...
March 2017: Journal of Parasitic Diseases: Official Organ of the Indian Society for Parasitology
https://www.readbyqxmd.com/read/28316016/complete-genome-sequence-and-evolution-analysis-of-a-columbid-herpesvirus-type-1-from-feral-pigeon-in-china
#19
Ying Guo, Siwen Li, Xiao Sun, Ying He, Hongjing Zhao, Yu Wang, Panpan Zhao, Mingwei Xing
Here, we report the genome sequence of a feral pigeon alphaherpesvirus (columbid herpesvirus type 1, CoHV-1), strain HLJ, and compare it with other avian alphaherpesviruses. The CoHV-1 strain HLJ genome is 204,237 bp in length and encodes approximately 130 putative protein-coding genes. Phylogenetically, CoHV-1 complete genome resides in a monophyletic group with the falconid herpesvirus type 1 (FaHV-1) genome, distant from other alphaherpesviruses. Interestingly, the evolutionary analysis of partial genes of CoHV-1 isolated from different organisms and areas (currently accessible on GenBank) indicates that the CoHV-1 HLJ strain isolated from pigeon (Columba livia) is closely related to the strains isolated from peregrine falcon (Falco peregrinus) in Poland and owl (Bubo virginianus) in USA...
July 2017: Archives of Virology
https://www.readbyqxmd.com/read/28093116/captive-and-free-living-urban-pigeons-columba-livia-from-brazil-as-carriers-of-multidrug-resistant-pathogenic-escherichia-coli
#20
Clarissa A Borges, Renato P Maluta, Lívia G Beraldo, Marita V Cardozo, Elisabete A L Guastalli, Subhashinie Kariyawasam, Chitrita DebRoy, Fernando A Ávila
Thirty Escherichia coli isolates from captive and free-living pigeons in Brazil were characterised. Virulence-associated genes identified in pigeons included those which occur relatively frequently in avian pathogenic E. coli (APEC) from commercial poultry worldwide. Eleven of 30 E. coli isolates from pigeons, belonging mainly to B1 and B2 phylogenetic groups, had high or intermediate pathogenicity for 1-day-old chicks. The frequency of multi-drug resistant (MDR) E. coli in captive pigeons was relatively high and included one isolate positive for the extended-spectrum β-lactamase (ESBL) gene blaCTX-M-8 ...
January 2017: Veterinary Journal
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