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https://www.readbyqxmd.com/read/28634106/biology-evolution-and-medical-importance-of-polyomaviruses-an-update
#1
REVIEW
Ugo Moens, Andi Krumbholz, Bernhard Ehlers, Roland Zell, Reimar Johne, Sébastien Calvignac-Spencer, Chris Lauber
The family Polyomaviridae encompasses non-enveloped viruses with a circular dsDNA genome that is typically approximately 5000bp in length. Originally isolated from mammals, polyomavirus sequences have now been detected in invertebrates, fish, amphibians, reptiles and birds, although it remains to be determined whether all these animals are genuine hosts. The genomes of all polyomaviruses encode at least two regulatory proteins (large and small tumour antigen) and two structural proteins (capsid proteins VP1 and VP2) whose functions have been defined...
June 17, 2017: Infection, Genetics and Evolution
https://www.readbyqxmd.com/read/28630932/differential-intron-retention-in-jumonji-chromatin-modifier-genes-is-implicated-in-reptile-temperature-dependent-sex-determination
#2
Ira W Deveson, Clare E Holleley, James Blackburn, Jennifer A Marshall Graves, John S Mattick, Paul D Waters, Arthur Georges
In many vertebrates, sex of offspring is determined by external environmental cues rather than by sex chromosomes. In reptiles, for instance, temperature-dependent sex determination (TSD) is common. Despite decades of work, the mechanism by which temperature is converted into a sex-determining signal remains mysterious. This is partly because it is difficult to distinguish the primary molecular events of TSD from the confounding downstream signatures of sexual differentiation. We use the Australian central bearded dragon, in which chromosomal sex determination is overridden at high temperatures to produce sex-reversed female offspring, as a unique model to identify TSD-specific features of the transcriptome...
June 2017: Science Advances
https://www.readbyqxmd.com/read/28629961/tortoises-in-front-of-mirrors-brain-asymmetries-and-lateralized-behaviours-in-the-tortoise-testudo-hermanni
#3
Valeria Anna Sovrano, Caterina Quaresmini, Gionata Stancher
Brain lateralization in response to social stimuli is well known for its involvement of the right hemisphere in several vertebrate species, including humans. This study aimed to investigate the laterality of the social behavior during the mirror-images inspection in tortoises (Testudo hermanni). In a rectangular apparatus, in presence or in absence of two mirrors as the longer walls, we assessed: 1) the animal's position and 2) the monocular viewing compared to the longer walls, 3) the paw used to start a movement from a resting position...
June 16, 2017: Behavioural Brain Research
https://www.readbyqxmd.com/read/28629177/exnotic-should-we-be-keeping-exotic-pets
#4
Rachel A Grant, V Tamara Montrose, Alison P Wills
There has been a recent trend towards keeping non-traditional companion animals, also known as exotic pets. These pets include parrots, reptiles, amphibians and rabbits, as well as small species of rodent such as degus and guinea pigs. Many of these exotic pet species are not domesticated, and often have special requirements in captivity, which many owners do not have the facilities or knowledge to provide. Keeping animals in settings to which they are poorly adapted is a threat to their welfare. Additionally, owner satisfaction with the animal may be poor due to a misalignment of expectations, which further impacts on welfare, as it may lead to repeated rehoming or neglect...
June 19, 2017: Animals: An Open Access Journal From MDPI
https://www.readbyqxmd.com/read/28627055/cholelithiasis-in-adult-bearded-dragons-retrospective-study-of-nine-adult-bearded-dragons-pogona-vitticeps-with-cholelithiasis-between-2013-and-2015-in-southern-germany
#5
A Gimmel, H Kempf, S Öfner, D Müller, A Liesegang
With an increased number of pet reptiles, many diseases occur due to nutritional disorders. Between 2013 and 2015, irregular gallbladder contents (sludge/choleliths) in adult bearded dragons (Pogona vitticeps) were recorded in many of the routinely conducted necropsies at the reptile rescue station in Munich (Auffangstation für Reptilien, München e.V., Munich, Germany). Nine animals, six from the rescue station and three from an associated veterinary practice (Tierärztliche Praxis für Exoten, Augsburg, Germany), were studied...
June 2017: Journal of Animal Physiology and Animal Nutrition
https://www.readbyqxmd.com/read/28625763/effects-of-tectonics-and-large-scale-climatic-changes-on-the-evolutionary-history-of-hyalomma-ticks
#6
Arthur F Sands, Dmitry A Apanaskevich, Sonja Matthee, Ivan G Horak, Alan Harrison, Shahid Karim, Mohammad K Mohammad, Kosta Y Mumcuoglu, Rupika S Rajakaruna, Maria M Santos-Silva, Conrad A Matthee
HyalommaKoch, 1844 are ixodid ticks that infest mammals, birds and reptiles, to which 27 recognized species occur across the Afrotropical, Palearctic and Oriental regions. Despite their medical and veterinary importance, the evolutionary history of the group is enigmatic. To investigate various taxonomic hypotheses based on morphology, and also some of the mechanisms involved in the diversification of the genus, we sequenced and analysed data derived from two mtDNA fragments, three nuclear DNA genes and 47 morphological characters...
June 15, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28623335/complex-neuroanatomy-in-the-rostrum-of-the-isle-of-wight-theropod-neovenator-salerii
#7
Chris Tijani Barker, Darren Naish, Elis Newham, Orestis L Katsamenis, Gareth Dyke
The discovery of large, complex, internal canals within the rostra of fossil reptiles has been linked with an enhanced tactile function utilised in an aquatic context, so far in pliosaurids, the Cretaceous theropod Spinosaurus, and the related spinosaurid Baryonyx. Here, we report the presence of a complex network of large, laterally situated, anastomosing channels, discovered via micro-focus computed tomography (μCT), in the premaxilla and maxilla of Neovenator, a mid-sized allosauroid theropod from the Early Cretaceous of the UK...
June 16, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28620610/molecular-detection-of-tick-borne-pathogen-diversities-in-ticks-from-livestock-and-reptiles-along-the-shores-and-adjacent-islands-of-lake-victoria-and-lake-baringo-kenya
#8
David Omondi, Daniel K Masiga, Burtram C Fielding, Edward Kariuki, Yvonne Ukamaka Ajamma, Micky M Mwamuye, Daniel O Ouso, Jandouwe Villinger
Although diverse tick-borne pathogens (TBPs) are endemic to East Africa, with recognized impact on human and livestock health, their diversity and specific interactions with tick and vertebrate host species remain poorly understood in the region. In particular, the role of reptiles in TBP epidemiology remains unknown, despite having been implicated with TBPs of livestock among exported tortoises and lizards. Understanding TBP ecologies, and the potential role of common reptiles, is critical for the development of targeted transmission control strategies for these neglected tropical disease agents...
2017: Frontiers in Veterinary Science
https://www.readbyqxmd.com/read/28616487/wild-snakes-harbor-west-nile-virus
#9
C R Dahlin, D F Hughes, W E Meshaka, C Coleman, J D Henning
West Nile virus (WNV) has a complex eco-epidemiology with birds acting as reservoirs and hosts for the virus. Less well understood is the role of reptiles, especially in wild populations. The goal of our study was to determine whether a wild population of snakes in Pennsylvania harbored WNV. Six species of snakes were orally sampled in the summer of 2013 and were tested for the presence of WNV viral RNA using RT-PCR. Two Eastern Garter Snakes, Thamnophis sirtalis sirtalis tested positive for viral RNA (2/123, 1...
December 2016: One Health
https://www.readbyqxmd.com/read/28614698/sardine-procalcitonin-amino-terminal-cleavage-peptide-has-a-different-action-from-calcitonin-and-promotes-osteoblastic-activity-in-the-scales-of-goldfish
#10
Yoichi Kase, Takahiro Ikari, Toshio Sekiguchi, Masayuki Sato, Shouzo Ogiso, Tsuyoshi Kawada, Shin Matsubara, Honoo Satake, Yuichi Sasayama, Masato Endo, Kei-Ichiro Kitamura, Atsuhiko Hattori, Takushi X Watanabe, Yusuke Maruyama, Yoshinari Watanabe, Hisayuki Funahashi, Akira Kambegawa, Nobuo Suzuki
The nucleotide sequence of a sardine preprocalcitonin precursor has been determined from their ultimobranchial glands in the present study. From our analysis of this sequence, we found that sardine procalcitonin was composed of procalcitonin amino-terminal cleavage peptide (N-proCT) (53 amino acids), CT (32 amino acids), and procalcitonin carboxyl-terminal cleavage peptide (C-proCT) (18 amino acids). As compared with C-proCT, N-proCT has been highly conserved among teleosts, reptiles, and birds, which suggests that N-proCT has some bioactivities...
June 11, 2017: Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
https://www.readbyqxmd.com/read/28614424/effects-of-roads-on-the-vertebrates-diversity-of-the-indigenous-territory-paresi-and-its-surrounding
#11
T R Brum, M Santos-Filho, G R Canale, A R A Ignácio
Roadkill impact is still underestimated due to the lack of knowledge of its intensity and effect on animal populations. To assess differences between animal roadkills on roads in distinct landscapes, this study recorded meso- and megavertebrate roadkills along 50 km during a year in two highways in the transitional area of Amazonia/Cerrado in Tangará da Serra, Mato Grosso: MT-358 and MT-235, the latter crossing the Paresi Indigenous Land. We assessed roadkill rates and points with higher rates of roadkills, recording the most impacted species, seasonal effects, biomass loss, activity period of species, and traffic volume...
June 12, 2017: Brazilian Journal of Biology, Revista Brasleira de Biologia
https://www.readbyqxmd.com/read/28612963/the-effectiveness-of-surrogate-taxa-to-conserve-freshwater-biodiversity
#12
David R Stewart, Zachary E Underwood, Frank J Rahel, Annika W Walters
Establishing protected areas has long been an effective conservation strategy, and is often based on more readily surveyed species. The potential of any freshwater taxa to be a surrogate of other aquatic groups has not been fully explored. We compiled occurrence data on 72 species of freshwater fish, amphibians, mussels, and aquatic reptiles for the Great Plains, Wyoming. We used hierarchical Bayesian multi-species mixture models and MaxEnt models to describe species distributions, and program Zonation to identify conservation priority areas for each aquatic group...
June 14, 2017: Conservation Biology: the Journal of the Society for Conservation Biology
https://www.readbyqxmd.com/read/28610093/-i-aplectana-i-i-nordestina-i-n-sp-nematoda-cosmocercidae-parasitizing-i-leposternon-polystegum-i-squamata-amphisbaenidae-from-northeastern-brazil
#13
Darciane Maria DE Amorim, Lidiane Aparecida Firmino DA Silva, Drausio Honorio Morais, Reinaldo José DA Silva, Robson Waldemar Ávila
There are currently 760 reptile species known in Brazil, from which about 70 are amphisbaenians with 25 species recorded in the Brazilian northeast (Vanzolini 2002; Gomes & Maciel 2012; Costa & Bérnils, 2014; Roberto et al., 2014). Leposternon polystegum Duméril, is a widespread species distributed in the Amazon, Atlantic Forest, Cerrado, and Caatinga biomes (Porto et al., 2000; Ribeiro et al., 2011). The diet is composed mainly by ants, termites, and coleopteran larvae (Barros-Filho & Valverde, 1996; Gomes et al...
March 23, 2017: Zootaxa
https://www.readbyqxmd.com/read/28608500/morphological-and-molecular-evolution-of-the-ultimobranchial-gland-of-non-mammalian-vertebrates-with-special-reference-to-the-chicken-c-cells
#14
REVIEW
Yoko Kameda
This review summarizes the current understanding of the non-mammalian ultimobranchial gland from morphological and molecular perspectives. Ultimobranchial anlage of all animal species develops from the last pharyngeal pouch. The genes involved in the development of pharyngeal pouches are well conserved across vertebrates. The ultimobranchial anlage of non-mammalian vertebrates and monotremes does not merge with the thyroid, remaining as an independent organ throughout adulthood. Although C cells of all animal species secrete calcitonin, the shape, cellular components and location of the ultimobranchial gland vary from species to species...
June 12, 2017: Developmental Dynamics: An Official Publication of the American Association of Anatomists
https://www.readbyqxmd.com/read/28606809/animal-derived-natural-products-used-in-the-bhutanese-sowa-riga-medicine
#15
Karma Yeshi, Paolo Morisco, Phurpa Wangchuk
ETHNOPHARMACOLOGICAL RELEVANCE: Bhutan has two traditional healing systems: a folklore medicine and the Bhutanese Sowa Rigpa medicine (BSM). Three different types of ingredients namely plants, animals (and their derived products) and minerals are used for the preparation of various formulations in combined form. Animals and their derived products are vital ingredients in the preparation of numerous traditional remedies. Unlike medicinal plants, research on medicinal animals has remained largely untouched...
June 9, 2017: Journal of Ethnopharmacology
https://www.readbyqxmd.com/read/28605969/control-of-hymenolepis-nana-infection-as-a-measure-to-improve-mouse-colony-welfare
#16
Alenka Dovč, Gordana Gregurić Gračner, Iztok Tomažič, Ksenija Vlahović, Marina Pavlak, Renata Lindtner Knific, Klemen Kralj, Mateja Stvarnik, Aleksandra Vergles Rataj
After cannibalism had appeared in the reproductive units of a white mouse colony, treatment against confirmed Hymenolepis nana, a tapeworm with zoonotic potential, was performed on 67 mice in the reproductive and nursery units. Faecal droppings were evaluated by flotation and sedimentation methods. The sedimentation method revealed a higher number of positive results before, during and after the treatment, but the flotation method yielded some additional positive cases. In the reproductive unit, H. nana eggs were confirmed in 50% of the tested mice by the flotation and in 70% by the sedimentation method...
June 2017: Acta Veterinaria Hungarica
https://www.readbyqxmd.com/read/28605672/intercellular-transfer-of-organelles-during-body-pigmentation
#17
REVIEW
Ryosuke Tadokoro, Yoshiko Takahashi
The intercellular transfer of the melanin-producing organelle, called melanosome, from melanocytes to adjacent keratinocytes, is largely responsible for the coat colors and skin pigmentation of amniotes (birds, reptiles, and mammals). Although several hypotheses of melanin-transfer were proposed mainly by in vitro studies and electron microscopies, how the melanosome transfer takes place in the actual skin remained unclear. With advances in technologies of gene manipulations and high-resolution microscopy that allow direct visualization of plasma membrane, we are beginning to understand the amazing behaviors and dynamics of melanocytes...
June 9, 2017: Current Opinion in Genetics & Development
https://www.readbyqxmd.com/read/28603688/novel-piroplasmid-and-hepatozoon-organisms-infecting-the-wildlife-of-two-regions-of-the-brazilian-amazon
#18
Herbert S Soares, Arlei Marcili, Amália R M Barbieri, Antonio H H Minervino, Thiago Rocha Moreira, Solange M Gennari, Marcelo B Labruna
During 2009-2012, wild animals were sampled in two areas within the Amazon biome of Brazil, in the states of Mato Grosso and Pará. Animal tissues and blood were molecularly tested for the presence of Piroplasmida (genera Babesia, Theileria, Cytauxzoon) or Hepatozoon DNA. Overall, 181 wild animals comprising 36 different species (2 reptiles, 5 birds, and 29 mammals) were sampled. The following Piroplasmida agents were detected: Cytauxzoon felis in one ocelot (Leopardus pardalis), Theileria cervi in two red brocket deer (Mazama americana), Theileria spp...
August 2017: International Journal for Parasitology. Parasites and Wildlife
https://www.readbyqxmd.com/read/28595343/sequencing-de-novo-assembling-and-annotating-the-genome-of-the-endangered-chinese-crocodile-lizard-shinisaurus-crocodilurus
#19
Jian Gao, Qiye Li, Zongji Wang, Yang Zhou, Paolo Martelli, Fang Li, Zijun Xiong, Jian Wang, Huanming Yang, Guojie Zhang
The Chinese crocodile lizard, Shinisaurus crocodilurus, is the only living representative of the monotypic family Shinisauridae under the order Squamata. It is an obligate semi-aquatic, viviparous, diurnal species restricted to specific portions of mountainous locations in southwestern China and northeastern Vietnam. However, in the past several decades, this species has undergone a rapid decrease in population size due to illegal poaching and habitat disruption, making this unique reptile species endangered and listed in CITES Appendix II since 1990...
June 8, 2017: GigaScience
https://www.readbyqxmd.com/read/28594833/diet-and-trophic-ecology-of-the-tiger-shark-galeocerdo-cuvier-from-south-african-waters
#20
Matthew L Dicken, Nigel E Hussey, Heather M Christiansen, Malcolm J Smale, Nomfundo Nkabi, Geremy Cliff, Sabine P Wintner
Knowledge of the diet and trophic ecology of apex predators is key for the implementation of effective ecosystem as well as species-based management initiatives. Using a combination of stomach content data and stable isotope analysis (δ15N and δ13C) the current study provides information on size-based and sex-specific variations in diet, trophic position (TP) and foraging habitat of tiger sharks (Galeocerdo cuvier) caught in the KwaZulu-Natal Sharks Board bather protection program. This study presents the longest time-series and most detailed analysis of stomach content data for G...
2017: PloS One
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