keyword
MENU ▼
Read by QxMD icon Read
search

Amphibians

keyword
https://www.readbyqxmd.com/read/29674915/amphibians-and-reptiles-of-the-state-of-durango-mexico-with-comparisons-with-adjoining-states
#1
Julio A Lemos-Espinal, Geoffrey R Smith, Hector Gadsden-Esparza, Rosaura Valdez-Lares, Guillermo A Woolrich-Piña
A summary of the species of amphibians and reptiles of Durango, as well as their geographic distributions, habitat, and conservation status have been compiled. The herpetofauna of Durango consists of 36 species of amphibians and 120 species of reptiles. Durango shares the most species with Chihuahua (74.0%), and shares fewer species with Sinaloa (48.0%), Nayarit (48.7%), and Coahuila (48.0%). Arid-semiarid and Sierras habitat types have the most species, with valleys and Quebradas habitat types having fewer species...
2018: ZooKeys
https://www.readbyqxmd.com/read/29674864/amphibians-and-reptiles-of-c-e-miller-ranch-and-the-sierra-vieja-chihuahuan-desert-texas-usa
#2
Drew R Davis, Travis J LaDuc
We report the occurrence of 50 species of amphibians and reptiles recently collected on C. E. Miller Ranch and the Sierra Vieja in the Chihuahuan Desert of Texas, USA and describe their perceived distribution and abundance across various habitat associations of the region. Our recent surveys follow intense, historic sampling of amphibians and reptiles from this region in 1948. Of the 50 species detected in recent surveys, six were not collected in 1948 and an additional three species documented in 1948 have yet to be detected in a 14-year period of recent surveys...
2018: ZooKeys
https://www.readbyqxmd.com/read/29674245/effects-of-multiple-life-stage-exposure-to-the-fungicide-prochloraz-in-xenopus-laevis-manifestations-of-antiandrogenic-and-other-modes-of-toxicity
#3
Jonathan T Haselman, Patricia A Kosian, Joseph J Korte, Allen W Olmstead, Sigmund J Degitz
The Larval Amphibian Growth and Development Assay (LAGDA) is an internationally harmonized testing guideline for evaluating effects of chronic chemical exposure in amphibians. In order to evaluate the effects of chronic exposure to an antiandrogenic chemical in an amphibian model, prochloraz was tested using a variation of the LAGDA design. Exposure was initiated with <1d post-fertilization embryos at nominal concentrations of 0, 6.7, 20, 60 and 180 μg/L (0, 18, 53, 159, 478 nM) and continued in flow-through conditions until two months following the median time that controls completed metamorphosis...
April 3, 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/29671842/corrigenda-davis-dr-laduc-tj-2018-amphibians-and-reptiles-of-c-e-miller-ranch-and-the-sierra-vieja-chihuahuan-desert-texas-usa-zookeys-735-97-130-https-doi-org-10-3897-zookeys-735-22200
#4
https://www.readbyqxmd.com/read/29671811/shape-shifted-red-blood-cells-a-novel-red-blood-cell-stage
#5
Verónica Chico, Sara Puente-Marin, Iván Nombela, Sergio Ciordia, María Carmen Mena, Begoña Carracedo, Alberto Villena, Luis Mercado, Julio Coll, María Del Mar Ortega-Villaizan
Primitive nucleated erythroid cells in the bloodstream have long been suggested to be more similar to nucleated red cells of fish, amphibians, and birds than the red cells of fetal and adult mammals. Rainbow trout Ficoll-purified red blood cells (RBCs) cultured in vitro undergo morphological changes, especially when exposed to stress, and enter a new cell stage that we have coined shape-shifted RBCs (shRBCs). We have characterized these shRBCs using transmission electron microscopy (TEM) micrographs, Wright⁻Giemsa staining, cell marker immunostaining, and transcriptomic and proteomic evaluation...
April 19, 2018: Cells
https://www.readbyqxmd.com/read/29668010/molecular-evolution-and-functional-divergence-of-alcohol-dehydrogenases-in-animals-fungi-and-plants
#6
Claudia E Thompson, Loreta B Freitas, Francisco M Salzano
Alcohol dehydrogenases belong to the large superfamily of medium-chain dehydrogenases/reductases, which occur throughout the biological world and are involved with many important metabolic routes. We considered the phylogeny of 190 ADH sequences of animals, fungi, and plants. Non-class III Caenorhabditis elegans ADHs were seen closely related to tetrameric fungal ADHs. ADH3 forms a sister group to amphibian, reptilian, avian and mammalian non-class III ADHs. In fishes, two main forms are identified: ADH1 and ADH3, whereas in amphibians there is a new ADH form (ADH8)...
2018: Genetics and Molecular Biology
https://www.readbyqxmd.com/read/29661911/patl2-is-a-key-actor-of-oocyte-maturation-whose-invalidation-causes-infertility-in-women-and-mice
#7
Marie Christou-Kent, Zine-Eddine Kherraf, Amir Amiri-Yekta, Emilie Le Blévec, Thomas Karaouzène, Béatrice Conne, Jessica Escoffier, Said Assou, Audrey Guttin, Emeline Lambert, Guillaume Martinez, Magalie Boguenet, Selima Fourati Ben Mustapha, Isabelle Cedrin Durnerin, Lazhar Halouani, Ouafi Marrakchi, Mounir Makni, Habib Latrous, Mahmoud Kharouf, Charles Coutton, Nicolas Thierry-Mieg, Serge Nef, Serge P Bottari, Raoudha Zouari, Jean Paul Issartel, Pierre F Ray, Christophe Arnoult
The genetic causes of oocyte meiotic deficiency (OMD), a form of primary infertility characterised by the production of immature oocytes, remain largely unexplored. Using whole exome sequencing, we found that 26% of a cohort of 23 subjects with OMD harboured the same homozygous nonsense pathogenic mutation in PATL2 , a gene encoding a putative RNA-binding protein. Using Patl2 knockout mice, we confirmed that PATL2 deficiency disturbs oocyte maturation, since oocytes and zygotes exhibit morphological and developmental defects, respectively...
April 16, 2018: EMBO Molecular Medicine
https://www.readbyqxmd.com/read/29660722/determinants-of-mercury-contamination-in-viperine-snakes-natrix-maura-in-western-europe
#8
Jérémy Lemaire, Paco Bustamante, Anthony Olivier, Olivier Lourdais, Bruno Michaud, Alexandre Boissinot, Pedro Galán, François Brischoux
The effects of Hg contamination are presumably widespread across the components of aquatic ecosystems, but investigations have been mainly focused on freshwater fish, because this biota represents a major source of Hg for human populations. Yet, the possible bioaccumulation of Hg on other freshwater meso- and apex-predators (e.g., amphibians, reptiles) has been largely overlooked, especially in Western Europe. In this study, the determinants of Hg concentrations were assessed for the viperine snake (Natrix maura) across 6 populations (>130 individuals sampled in 2016 and 2017) in France and Spain...
April 13, 2018: Science of the Total Environment
https://www.readbyqxmd.com/read/29660695/metabolite-profiles-of-striped-marsh-frog-limnodynastes-peronii-larvae-exposed-to-the-anti-androgenic-fungicides-vinclozolin-and-propiconazole-are-consistent-with-altered-steroidogenesis-and-oxidative-stress
#9
Steven D Melvin, Frederic D L Leusch, Anthony R Carroll
Amphibians use wetlands in urban and agricultural landscapes for breeding, growth and development. Fungicides and other pesticides used in these areas have therefore been identified as potential threats that could contribute towards amphibian population declines. However, relatively little is known about how such chemicals influence sensitive early life-stages or how short episodic exposures influence sub-lethal physiological and metabolic pathways. The present study applied untargeted metabolomics to evaluate effects in early post-hatch amphibian larvae exposed to the anti-androgenic fungicides vinclozolin and propiconazole...
April 11, 2018: Aquatic Toxicology
https://www.readbyqxmd.com/read/29659942/evolutionary-associations-of-endosymbiotic-ciliates-shed-light-on-the-timing-of-the-marsupial-placental-split
#10
Peter Vdacný
Trichostome ciliates are among the most conspicuous protists in the gastrointestinal tract of a large variety of vertebrates. However, little is still known about phylogeny of the trichostome/vertebrate symbiotic systems, evolutionary correlations between trichostome extrinsic traits, and character-dependent diversification of trichostomes. These issues were investigated here, using the relaxed molecular clock technique along with stochastic mapping of character evolution, and binary-state speciation and extinction models...
April 11, 2018: Molecular Biology and Evolution
https://www.readbyqxmd.com/read/29659568/introduced-bullfrog-facilitates-pathogen-invasion-in-the-western-united-states
#11
Tiffany A Yap, Michelle S Koo, Richard F Ambrose, Vance T Vredenburg
Batrachochytrium dendrobatidis (Bd), a causal agent of the amphibian fungal skin disease chytridiomycosis, has been implicated in the decline and extinction of over 200 species worldwide since the 1970s. Despite almost two decades of research, the history of Bd and its global spread is not well understood. However, the spread of the Global Panzootic Lineage of Bd (Bd-GPL), the lineage associated with amphibian die-offs, has been linked with the American bullfrog (Rana [Aqurana] catesbeiana) and global trade...
2018: PloS One
https://www.readbyqxmd.com/read/29657316/legless-baby-amphibians-dine-on-mother-s-skin
#12
(no author information available yet)
No abstract text is available yet for this article.
April 2018: Nature
https://www.readbyqxmd.com/read/29657154/two-new-species-of-hepatozoon-apicomplexa-hepatozoidae-parasitising-species-of-philothamnus-ophidia-colubridae-from-south-africa
#13
Courtney Antonia Cook, Edward Charles Netherlands, Johann van As, Nico Jacobus Smit
To date, only a few species of Hepatozoon Miller, 1908 have been described from amphibians and reptiles of South Africa, including two species from anuran hosts, three from saurians, one from chelonians, and two from ophidians. Hepatozoon bitis (Fantham, 1925) and Hepatozoon refringens (Sambon et Seligmann, 1907), parasitising Bitis arientans (Merrem) and Pseudoaspis cana (Linnaeus), respectively, were described in the early 1900s and since then there have been no further species of Hepatozoon described from snakes in South Africa...
April 3, 2018: Folia Parasitologica
https://www.readbyqxmd.com/read/29656046/developmental-expression-profiles-and-thyroidal-regulation-of-cytokines-during-metamorphosis-in-the-amphibian-xenopus-laevis
#14
Melanie J Gallant, Natacha S Hogan
Early life-stages of amphibians rely on the innate immune system for defense against pathogens. While thyroid hormones (TH) are critical for metamorphosis and later development of the adaptive immune system, the role of TH in innate immune system development is less clear. An integral part of the innate immune response are pro-inflammatory cytokines - effector molecules that allow communication between components of the immune system. The objective of this study was to characterize the expression of key pro-inflammatory cytokines, tumor necrosis factor-α (TNFα), interleukin-1β (IL-1β) and interferon-γ (IFN-γ), throughout amphibian development and determine the impacts of thyroidal modulation on their expression...
April 12, 2018: General and Comparative Endocrinology
https://www.readbyqxmd.com/read/29655471/group-treatment-strategies-for-animals-in-a-zoologic-setting
#15
REVIEW
Katie W Delk, Christine M Molter
Providing care for groups of animals is a major part of practicing zoologic medicine. Herd health is key to the mindset of a zoo clinician no matter the species encountered. Group treatment of amphibians and birds is common, but it is uncommon in reptiles and most mammals. The main reason groups of mammals are treated is for gastrointestinal parasitism. In addition to the classic examples of group treatment involving chemotherapeutics, zoo clinicians also practice herd health by preventing disease from entering the collection...
May 2018: Veterinary Clinics of North America. Exotic Animal Practice
https://www.readbyqxmd.com/read/29653385/histological-and-ultrastructural-alterations-of-the-italian-newt-lissotriton-italicus-skin-after-exposure-to-ecologically-relevant-concentrations-of-nonylphenol-ethoxylates
#16
Elvira Brunelli
Nonylphenol ethoxylates (NPEs) are well known endocrine disruptors. Widespread environmental contamination from NPEs is an issue of great concern. Despite amphibians are often exposed to such contaminants, very little attention has been dedicated to this vertebrate group. No information is available on the effects of NPEs onto the amphibian skin and only few reports have been conducted on fish. Here, histological and ultrastructural modifications of the skin have been evaluated in the Italian newt Lissotriton italicus...
April 7, 2018: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/29644074/acquisition-of-pluripotency-in-the-chick-embryo-occurs-during-intrauterine-embryonic-development-via-a-unique-transcriptional-network
#17
Jae Yong Han, Hyo Gun Lee, Young Hyun Park, Young Sun Hwang, Sang Kyung Kim, Deivendran Rengaraj, Byung Wook Cho, Jeong Mook Lim
Background: Acquisition of pluripotency by transcriptional regulatory factors is an initial developmental event that is required for regulation of cell fate and lineage specification during early embryonic development. The evolutionarily conserved core transcriptional factors regulating the pluripotency network in fishes, amphibians, and mammals have been elucidated. There are also species-specific maternally inherited transcriptional factors and their intricate transcriptional networks important in the acquisition of pluripotency...
2018: Journal of Animal Science and Biotechnology
https://www.readbyqxmd.com/read/29643444/a-bowman-birk-type-chymotrypsin-inhibitor-peptide-from-the-amphibian-hylarana-erythraea
#18
Luyao Zhang, Xiaoling Chen, Yue Wu, Mei Zhou, Chengbang Ma, Xinping Xi, Tianbao Chen, Brian Walker, Chris Shaw, Lei Wang
The first amphibian skin secretion-derived Bowman-Birk type chymotrypsin inhibitor is described here from the Asian green frog, Hylarana erythraea, and was identified by use of molecular cloning and tandem mass spectrometric amino acid sequencing. It was named Hylarana erythraea chymotrypsin inhibitor (HECI) and in addition to inhibition of chymotrypsin (Ki = 3.92 ± 0.35 μM), the peptide also inhibited the 20 S proteasome (Ki = 8.55 ± 1.84  μM). Additionally, an analogue of HECI, named K9 -HECI, in which Phe9 was substituted by Lys9 at the P1 position, was functional as a trypsin inhibitor...
April 11, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29628917/discovery-of-distinctin-like-peptide-ph-dlp-ph-from-the-skin-secretion-of-phyllomedusa-hypochondrialis-a-prototype-of-a-novel-family-of-antimicrobial-peptide
#19
Di Wu, Yitian Gao, Yining Tan, Yuzhang Liu, Lei Wang, Mei Zhou, Xinping Xi, Chengbang Ma, Olaf R P Bininda-Emonds, Tianbao Chen, Chris Shaw
Amphibian skin secretions are an important treasure house of bioactive antimicrobial peptides (AMPs). Despite having been the focus of decades of research in this context, investigations of phyllomedusine frogs continue to identify new AMPs from their skin secretions. In this study, the prototype of a novel family of AMP distinctin-like-peptide-PH (DLP-PH) was identified from the skin secretion of the otherwise well-studied Tiger-Legged Tree Frog Phyllomedusa hypochondrialis through cloning of its precursor-encoding cDNA from a skin secretion-derived cDNA library by a 3'-rapid amplification of cDNA ends (RACE) strategy...
2018: Frontiers in Microbiology
https://www.readbyqxmd.com/read/29627338/a-comparative-review-on-estrogen-receptors-in-the-reproductive-male-tract-of-non-mammalian-vertebrates
#20
REVIEW
Mariailaria Verderame, Rosaria Scudiero
Estrogen receptors alpha (ERα) and beta (ERβ) are transcription factors known to be involved in the regulation of many complex physiological processes in mammals. They are expressed primarily in the reproductive tract of all vertebrates females, thus indicating important and conserved functions in female reproductive success. ERs are also present in physiological different tissues as bone, brain, liver, skin and adipose tissues, in both females and males. In the latter, ERs have been found also in the genital tract, supporting the findings of a complex role for estrogen in spermatogenesis and, more generally, in male reproduction...
April 5, 2018: Steroids
keyword
keyword
48195
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"