keyword
MENU ▼
Read by QxMD icon Read
search

Reptiles

keyword
https://www.readbyqxmd.com/read/29222153/the-future-of-keeping-pet-reptiles-and-amphibians
#1
Chris Draper, Mark Jones
No abstract text is available yet for this article.
December 2017: Veterinary Record
https://www.readbyqxmd.com/read/29219036/head-movements-during-visual-orienting-toward-moving-prey-in-the-lizard-takydromus-tachydromoides
#2
Miyuki Fukudome, Yoshifumi Yamawaki
It is important to investigate visual orienting in reptiles to better understand the basic organization of the oculomotor system in vertebrates. However, quantitative analyses of visual orienting behavior in reptiles have rarely been conducted, except in chameleons. In the present study, we videorecorded the head and body movements of the lizard Takydromus tachydromoides during visual tracking of moving prey and analyzed them frame-by-frame. Before approaching prey, visual tracking mainly consisted of brief intermittent turns of the head (saccade)...
December 2017: Zoological Science
https://www.readbyqxmd.com/read/29215000/the-evolution-of-the-macrophage-specific-enhancer-fms-intronic-regulatory-element-within-the-csf1r-locus-of-vertebrates
#3
David A Hume, Evi Wollscheid-Lengeling, Rocio Rojo, Clare Pridans
The Csf1r locus encodes the receptor for macrophage colony-stimulating factor, which controls the proliferation, differentiation and survival of macrophages. The 300 bp Fms intronic regulatory element (FIRE), within the second intron of Csf1r, is necessary and sufficient to direct macrophage-specific transcription. We have analysed the conservation and divergence of the FIRE DNA sequence in vertebrates. FIRE is present in the same location in the Csf1r locus in reptile, avian and mammalian genomes. Nearest neighbor analysis based upon this element alone largely recapitulates phylogenies inferred from much larger genomic sequence datasets...
December 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29213275/dynamic-changes-in-host-gene-expression-following-in-vitro-viral-mimic-stimulation-in-crocodile-cells
#4
Subir Sarker, Yinan Wang, Brenden Warren-Smith, Karla J Helbig
The initial control of viral infection in a host is dominated by a very well orchestrated early innate immune system; however, very little is known about the ability of a host to control viral infection outside of mammals. The reptiles offer an evolutionary bridge between the fish and mammals, with the crocodile having evolved from the archosauria clade that included the dinosaurs, and being the largest living reptile species. Using an RNA-seq approach, we have defined the dynamic changes of a passaged primary crocodile cell line to stimulation with both RNA and DNA viral mimics...
2017: Frontiers in Immunology
https://www.readbyqxmd.com/read/29210090/towards-understanding-the-dose-and-timing-effect-of-hydrocortisone-treatment-on-the-scleral-ossicle-system-within-the-chicken-eye
#5
Christine L Hammer, Tamara A Franz-Odendaal
Previous work, almost four decades ago, showed that hydrocortisone (HC) treatment reduces the number of skeletogenic condensations that give rise to the scleral ossicles in the chicken eye. The scleral ossicles are a ring of overlapping intramembranous bones, the sclerotic ring, and are present in most reptiles, including birds. The scleral condensations that give rise to the scleral ossicles are induced by a series of overlying thickenings (or papillae) of the conjunctival epithelium. Here, we further explore the effects of altering the dosage and timing of HC treatment on the morphology and number of skeletogenic condensations and conjunctival papillae...
December 6, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29210080/the-permian-reptile-opisthodontosaurus-carrolli-a%C3%A2-model-for-acrodont-tooth-replacement-and-dental-ontogeny
#6
Yara Haridy, Aaron R H LeBlanc, Robert R Reisz
Continuous tooth replacement is common for tetrapods, but some groups of acrodont lepidosaurs have lost the ability to replace their dentition (monophyodonty). Acrodonty, where the tooth attaches to the apex of the jawbone, is an unusual form of tooth attachment that has been associated with the highly autapomorphic condition of monophyodonty. Beyond Lepidosauria, very little is known about the relationship between acrodonty and monophyodonty in other amniotes. We test for this association with a detailed study of the dentition of Opisthodontosaurus, an unusual Early Permian captorhinid eureptile with acrodont dentition...
December 6, 2017: Journal of Anatomy
https://www.readbyqxmd.com/read/29209577/new-anatomical-information-of-the-wukongopterid-kunpengopterus-sinensis-wang-et-al-2010-based-on-a-new-specimen
#7
Xin Cheng, Shunxing Jiang, Xiaolin Wang, Alexander W A Kellner
The Wukongopteridae compose a non-pterodactyloid clade of pterosaurs that are the most abundant flying reptiles in the deposits of the Middle-Late Jurassic Yanliao Biota. Until now, five species of three genera and two additional unnamed specimens have been described. Here we report on a new material, IVPP V 23674, that can be referred to the wukongopterid Kunpengopterus sinensis due to several features such as a comparably short nasoantorbital fenestra, the dorsally rising posterodorsal margin of the ischium, and the very short first pedal phalanx of digit V relative to metatarsal IV...
2017: PeerJ
https://www.readbyqxmd.com/read/29208994/author-correction-the-global-distribution-of-tetrapods-reveals-a-need-for-targeted-reptile-conservation
#8
Uri Roll, Anat Feldman, Maria Novosolov, Allen Allison, Aaron M Bauer, Rodolphe Bernard, Monika Böhm, Fernando Castro-Herrera, Laurent Chirio, Ben Collen, Guarino R Colli, Lital Dabool, Indraneil Das, Tiffany M Doan, Lee L Grismer, Marinus Hoogmoed, Yuval Itescu, Fred Kraus, Matthew LeBreton, Amir Lewin, Marcio Martins, Erez Maza, Danny Meirte, Zoltán T Nagy, Cristiano de C Nogueira, Olivier S G Pauwels, Daniel Pincheira-Donoso, Gary D Powney, Roberto Sindaco, Oliver Tallowin, Omar Torres-Carvajal, Jean-François Trape, Enav Vidan, Peter Uetz, Philipp Wagner, Yuezhao Wang, C David L Orme, Richard Grenyer, Shai Meiri
No abstract text is available yet for this article.
December 5, 2017: Nature Ecology & Evolution
https://www.readbyqxmd.com/read/29208246/history-of-reptile-placentology-part-iii-giacomini-s-1891-histological-monograph-on-lizard-placentation
#9
REVIEW
D G Blackburn, L Paulesu, A M Avanzati, M Roth
By the 1890s, placental arrangements had been documented macroscopically in lizards and fishes, but placental studies on such species lagged far behind research on mammals. In 1891, the biologist Ercole Giacomini (at the University of Siena, Italy) published the first histological analysis of a reptile placenta. Focusing on a placentotrophic lizard (Chalcides chalcides) with a morphologically complex placenta, Giacomini documented the histological and cellular bases for placental nutrient transfer and gas exchange...
December 2017: Placenta
https://www.readbyqxmd.com/read/29205893/measuring-the-gut-microbiome-in-birds-comparison-of-faecal-and-cloacal-sampling
#10
Elin Videvall, Maria Strandh, Anel Engelbrecht, Schalk Cloete, Charlie K Cornwallis
The gut microbiomes of birds and other animals are increasingly being studied in ecological and evolutionary contexts. Numerous studies on birds and reptiles have made inferences about gut microbiota using cloacal sampling, however, it is not known whether the bacterial community of the cloaca provides an accurate representation of the avian gut microbiome. We examined the accuracy with which cloacal swabs and faecal samples measure the microbiota in three different parts of the gastrointestinal tract (ileum, caecum, and colon) using a case study on juvenile ostriches, Struthio camelus, and high-throughput 16S rRNA sequencing...
December 4, 2017: Molecular Ecology Resources
https://www.readbyqxmd.com/read/29205884/potential-adult-neurogenesis-in-the-telencephalon-and-cerebellar-cortex-of-the-nile-crocodile-revealed-with-doublecortin-immunohistochemistry
#11
Ayanda Ngwenya, Nina Patzke, Suzana Herculano-Houzel, Paul R Manger
The brain of the crocodile is known to gain in mass allometrically throughout life, and the addition of neurons (as well as non-neurons) appears to play a significant role in this increasing brain mass. We used immunohistochemistry in the brains of 12 Nile crocodiles ranging between 350 g and 86 kg in body mass and 1.99 g to 7.9 g in brain mass to identify the regions of the brain in which neurons immunopositive for doublecortin, a marker for potential adult neurogenesis, are found. Similar to other reptiles, potential newly born neurons, those immunopositive for doublecortin, were found throughout the telencephalon, the main and accessory olfactory bulbs and the olfactory tract, and in the cerebellar cortex; however, no doublecortin immunopositive neurons were observed in the diencephalon or brainstem...
December 2, 2017: Anatomical Record: Advances in Integrative Anatomy and Evolutionary Biology
https://www.readbyqxmd.com/read/29203331/a-crucial-role-of-paralogous-%C3%AE-defensin-genes-in-the-chinese-alligator-innate-immune-system-revealed-by-the-first-determination-of-a-crocodilia-defensin-cluster
#12
Ke-Yi Tang, Xin Wang, Qiu-Hong Wan, Sheng-Guo Fang
The β-defensin, one of the antimicrobial peptides (AMPs), is a significant component of the innate immune with a broad range of antimicrobial activities. Differing from the widely-studied mammals and birds, limited information about β-defensins has been reported in reptiles, especially in crocodilians. As a same ancient species as dinosaurs and the most endangered species of 23 crocodilians, the survival of Chinese alligator (Alligator sinensis) means a powerful immune system and possible involvement of AMPs in its immune resistance...
December 1, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/29201148/whole-genome-sequencing-based-detection-of-antimicrobial-resistance-and-virulence-in-non-typhoidal-salmonella-enterica-isolated-from-wildlife
#13
Milton Thomas, Gavin John Fenske, Linto Antony, Sudeep Ghimire, Ronald Welsh, Akhilesh Ramachandran, Joy Scaria
The aim of this study was to generate a reference set of Salmonella enterica genomes isolated from wildlife from the United States and to determine the antimicrobial resistance and virulence gene profile of the isolates from the genome sequence data. We sequenced the whole genomes of 103 Salmonella isolates sampled between 1988 and 2003 from wildlife and exotic pet cases that were submitted to the Oklahoma Animal Disease Diagnostic Laboratory, Stillwater, Oklahoma. Among 103 isolates, 50.48% were from wild birds, 0...
2017: Gut Pathogens
https://www.readbyqxmd.com/read/29200993/brain-sexual-differentiation-and-requirement-of-sry-why-or-why-not
#14
REVIEW
Cheryl S Rosenfeld
Brain sexual differentiation is orchestrated by precise coordination of sex steroid hormones. In some species, programming of select male brain regions is dependent upon aromatization of testosterone to estrogen. In mammals, these hormones surge during the organizational and activational periods that occur during perinatal development and adulthood, respectively. In various fish and reptiles, incubation temperature during a critical embryonic period results in male or female sexual differentiation, but this can be overridden in males by early exposure to estrogenic chemicals...
2017: Frontiers in Neuroscience
https://www.readbyqxmd.com/read/29200730/comparative-proteomic-analysis-of-three-gelatinous-chinese-medicines-and-their-authentications-by-tryptic-digested-peptides-profiling-using-matrix-assisted-laser-desorption-ionization-time-of-flight-time-of-flight-mass-spectrometry
#15
Huan Yang, Jie Zheng, Hai-Yan Wang, Nan Li, Ya-Ya Yang, Yu-Ping Shen
Background: Gelatinous Chinese medicines (GCMs) including Asini Corii Colla, Testudinis Carapacis ET Plastri Colla, and Cervi Cornus Colla, were made from reptile shell or mammalian skin or deer horn, and consumed as a popular tonic, as well as hemopoietic and hemostatic agents. Misuse of them would not exert their functions, and fake or adulterate products have caused drug market disorder and affected food and drug safety. GCMs are rich in denatured proteins, but insufficient in available DNA fragments, hence commonly used cytochrome c oxidase I barcoding was not successful for their authentication...
October 2017: Pharmacognosy Magazine
https://www.readbyqxmd.com/read/29197555/temperature-vs-estrogen-induced-sex-determination-in-caiman-latirostris-embryos-both-females-but-with-different-expression-patterns-of-key-molecules-involved-in-ovarian-development
#16
Canesini Guillermina, Stoker Cora, H Galoppo Germán, L Durando Milena, V Tschopp María, H Luque Enrique, M Muñoz-de-Toro Mónica, G Ramos Jorge
Caiman latirostris is a species with temperature dependent sex determination (TSD), which implies that the incubation temperature of the eggs is the main factor that determines the sex during a thermo-sensitive period (TSP). However, estrogens play a critical role in this process. The administration of 17β-estradiol (E2) previous to TSP overrides the effects of male incubation temperature, producing phenotypic females. This effect has been defined as sex reversal or estrogen-induced sex determination (E2SD)...
November 29, 2017: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29196204/underground-cryptic-speciation-within-the-maghreb-multilocus-phylogeography-sheds-light-on-the-diversification-of-the-checkerboard-worm-lizard-trogonophis-wiegmanni
#17
Daniele Salvi, Ana Perera, Filipa L Sampaio, Salvador Carranza, D James Harris
Biogeographic and evolutionary patterns in the North African portion of the Western Palaearctic are poorly known. A high fraction of undescribed diversity is expected in this region, especially in groups such as reptiles. Here we used mitochondrial (12S, 16S, cytb) and nuclear (pomc, rag2, cmos) markers and morphological data to investigate phyletic diversification and phylogeographical structure in the amphisbaenian Trogonophis wiegmanni endemic to the Maghreb. Phylogenetic and molecular dating analyses based on gene trees and species trees support three deeply divergent lineages of Pliocene origin, two in Morocco and one in central Algeria and Tunisia...
November 28, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/29194953/reptile-embryos-are-not-capable-of-behavioral-thermoregulation-in-the-egg
#18
Gerardo A Cordero, Rory S Telemeco, Eric J Gangloff
Reptile embryos have recently been observed moving within the egg in response to temperature, raising the exciting possibility that embryos might behaviorally thermoregulate analogous to adults. However, the conjecture that reptile embryos have ample opportunity and capacity to adaptively control their body temperature warrants further discussion. Using turtles as a model, we discuss the spatiotemporal constraints to movement in reptile embryos. We demonstrate that, as embryos grow, the internal egg space rapidly diminishes such that the temporal window for appreciable displacement is confined to stages that feature incomplete neuromuscular differentiation...
December 1, 2017: Evolution & Development
https://www.readbyqxmd.com/read/29194826/disentangling-sex-allocation-in-a-viviparous-reptile-with-temperature-dependent-sex-determination-a-multifactorial-approach
#19
Jodie Gruber, George D Cunningham, Geoffrey M While, Erik Wapstra
Females are predicted to alter sex allocation when ecological, physiological and behavioural variables have different consequences on the fitness of male and female offspring. Traditionally, tests of sex allocation have examined single causative factors, often ignoring possible interactions between multiple factors. Here we used a multi-factorial approach to examine sex allocation in the viviparous skink, Niveoscincus ocellatus. We integrated a 16-year observational field study with a manipulative laboratory experiment to explore whether the effects of the maternal thermal environment interact with the resources available to females for reproduction to affect sex allocation decisions...
December 1, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/29192338/evolutionary-trends-in-animal-ribosomal-dna-loci-introduction-to-a-new-online-database
#20
Jana Sochorová, Sònia Garcia, Francisco Gálvez, Radka Symonová, Aleš Kovařík
Ribosomal DNA (rDNA) loci encoding 5S and 45S (18S-5.8S-28S) rRNAs are important components of eukaryotic chromosomes. Here, we set up the animal rDNA database containing cytogenetic information about these loci in 1343 animal species (264 families) collected from 542 publications. The data are based on in situ hybridisation studies (both radioactive and fluorescent) carried out in major groups of vertebrates (fish, reptiles, amphibians, birds, and mammals) and invertebrates (mostly insects and mollusks). The database is accessible online at www...
November 30, 2017: Chromosoma
keyword
keyword
3802
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"