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https://www.readbyqxmd.com/read/29150984/how-the-environment-shapes-animal-signals-a-test-of-the-acoustic-adaptation-hypothesis-in-frogs
#1
Sandra Goutte, Alain Dubois, Samuel D Howard, Rafael Márquez, Jodi J L Rowley, J Maximilian Dehling, Philippe Grandcolas, Rongchuan Xiong, Frédéric Legendre
Long distance acoustic signals are widely used in animal communication systems and, in many cases, essential for reproduction. The Acoustic Adaptation Hypothesis (AAH) implies that acoustic signals should be selected for further transmission and better content integrity under the acoustic constraints of the habitat in which they are produced. In the present study, we test predictions derived from the AAH in frogs. Specifically, we focus on the difference between torrent frogs and frogs calling in less noisy habitats...
November 18, 2017: Journal of Evolutionary Biology
https://www.readbyqxmd.com/read/29134001/a-new-species-of-the-genus-rana-from-henan-central-china-anura-ranidae
#2
Haipeng Zhao, Junxiao Yang, Chunping Wang, Pipeng Li, Robert W Murphy, Jing Che, Zhiyong Yuan
A new species of brown frog Rana luanchuanensis Zhao & Yuan, sp. n. is described from Luanchuan County, western Henan, central China. The mitochondrial genealogy suggests that the new species is the sister taxon to the clade including R. amurensis and R. coreana, and is separated by uncorrected pairwise distances more than 12.5%. Morphologically, this new species differs from its congeners by a suite of characters. Analyses of partial sequences of cytochrome oxidase subunit I (COI) resolve the new species as a single matriline...
2017: ZooKeys
https://www.readbyqxmd.com/read/29127278/the-north-american-bullfrog-draft-genome-provides-insight-into-hormonal-regulation-of-long-noncoding-rna
#3
S Austin Hammond, René L Warren, Benjamin P Vandervalk, Erdi Kucuk, Hamza Khan, Ewan A Gibb, Pawan Pandoh, Heather Kirk, Yongjun Zhao, Martin Jones, Andrew J Mungall, Robin Coope, Stephen Pleasance, Richard A Moore, Robert A Holt, Jessica M Round, Sara Ohora, Branden V Walle, Nik Veldhoen, Caren C Helbing, Inanc Birol
Frogs play important ecological roles, and several species are important model organisms for scientific research. The globally distributed Ranidae (true frogs) are the largest frog family, and have substantial evolutionary distance from the model laboratory Xenopus frog species. Unfortunately, there are currently no genomic resources for the former, important group of amphibians. More widely applicable amphibian genomic data is urgently needed as more than two-thirds of known species are currently threatened or are undergoing population declines...
November 10, 2017: Nature Communications
https://www.readbyqxmd.com/read/29117370/molecular-confirmation-of-frogs-anura-as-hosts-of-corethrellidae-diptera-in-the-southeastern-united-states
#4
Jeremy V Camp, William S Irby
Flies in the family Corethrellidae Edwards 1932 (Diptera) are known to be attracted to the mating calls of male frogs. For the first time, the hosts of corethrellids were identified to species by analyzing bloodmeals taken from resting female flies. A portion of the cytochrome b gene was amplified and sequenced from blood-engorged flies using vertebrate-specific primers. The flies were collected over 6 yr at two locations in the southeastern United States from resting boxes and natural resting sites (rodent burrows)...
September 1, 2017: Journal of Insect Science
https://www.readbyqxmd.com/read/28986768/scarce-occurrence-of-calcification-in-human-sinoatrial-nodal-arteries-in-old-age
#5
Yoshiyuki Tohno, Setsuko Tohno, Ranida Quiggins, Takeshi Minami, Pasuk Mahakkanukrauh
To elucidate age-related changes of the sinoatrial (sinuatrial) nodal (SAN) artery, the authors investigated age-related changes of elements in the SAN artery by direct chemical analysis. In addition, the effects of different arterial origins, arterial sizes, and genders on element accumulation were investigated in the SAN artery. Fifty-nine formalin-fixed adult Thai hearts were dissected, and the following three types of the SAN artery were found: The first type was a single SAN artery arising from the right coronary artery (RCA)...
October 7, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28887047/temporary-removal-peptides-from-frog-skin-with-potential-for-development-into-agents-for-type-2-diabetes-therapy
#6
J Michael Conlon, Milena Mechkarska, Yasser H Abdel-Wahab, Peter R Flatt
The publisher regrets that this article has been temporarily removed. A replacement will appear as soon as possible in which the reason for the removal of the article will be specified, or the article will be reinstated.
September 5, 2017: Peptides
https://www.readbyqxmd.com/read/28865127/evaluation-of-an-acute-oral-gavage-method-for-the-evaluation-of-pesticide-toxicity-in-terrestrial-amphibians
#7
Douglas J Fort, Michael B Mathis, Faith Kee, Paul Whatling, David Clerkin, Jane Staveley, Clifford Habig
Development of an acute oral toxicity test with a terrestrial-phase amphibian was considered necessary to remove the uncertainty within the field of agrochemical risk assessments. The bullfrog (Lithobates catesbeianus) was selected for use as it is a representative of the family Ranidae and historically this species has been used as an amphibian test model species. Prior to definitive study, oral gavage methods were developed with fenthion and tetraethyl pyrophosphate (TEPP). Dimethoate and malathion were subsequently tested with both male and female juvenile bullfrogs in comprehensive acute oral LD50 studies...
September 2, 2017: Environmental Toxicology and Chemistry
https://www.readbyqxmd.com/read/28699258/cytotoxic-peptides-with-insulin-releasing-activities-from-skin-secretions-of-the-italian-stream-frog-rana-italica-ranidae
#8
J Michael Conlon, Vishal Musale, Samir Attoub, Maria Luisa Mangoni, Jérôme Leprince, Laurent Coquet, Thierry Jouenne, Yasser H A Abdel-Wahab, Peter R Flatt, Andrea C Rinaldi
Peptidomic analysis of norepinephrine-stimulated skin secretions from Italian stream frog Rana italica led to the purification and characterization of two host-defense peptides differing by a single amino acid residue belonging to the brevinin-1 family (brevinin-1ITa and -1ITb), a peptide belonging to the temporin family (temporin-ITa) and a component identified as prokineticin Bv8. The secretions contained relatively high concentrations of the methionine-sulphoxide forms of brevinin-1ITa and -1ITb suggesting that these peptides may have a role as antioxidants in the skin of this montane frog...
July 11, 2017: Journal of Peptide Science: An Official Publication of the European Peptide Society
https://www.readbyqxmd.com/read/28620851/changes-of-erythrocyte-metric-parameters-in-pelophylax-ridibundus-amphibia-anura-ranidae-inhabiting-water-bodies-with-different-types-of-anthropogenic-pollution-in-southern-bulgaria
#9
Zhivko Zhelev, Georgi Popgeorgiev, Ivan Ivanov, Peter Boyadzhiev
The article presents the basic erythrocyte-metric parameters: cell length (EL) and width (EW), EL/EW, erythrocyte size (ES), nucleus length (NL) and width (NW), NL/NW, nucleus size (NS) and nucleocytoplasmic ratio (NS/ES) in the wild populations of marsh frogs Pelophylax ridibundus from five water bodies in Southern Bulgaria (two rivers and three reservoirs) with different degrees and types of anthropogenic pollution (less disrupted water basins, domestic sewage pollution and heavy metal pollution). The changes in erythrocyte-metric parameters depend on concentrations and types of toxicant and, to a lesser extent, on the type of water basin...
July 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28587861/evolutionary-dynamics-of-an-expressed-mhc-class-ii%C3%AE-locus-in-the-ranidae-anura-uncovered-by-genome-walking-and-high-throughput-amplicon-sequencing
#10
Kevin P Mulder, Maria Cortazar-Chinarro, D James Harris, Angelica Crottini, Evan H Campbell Grant, Robert C Fleischer, Anna E Savage
The Major Histocompatibility Complex (MHC) is a genomic region encoding immune loci that are important and frequently used markers in studies of adaptive genetic variation and disease resistance. Given the primary role of infectious diseases in contributing to global amphibian declines, we characterized the hypervariable exon 2 and flanking introns of the MHC Class IIβ chain for 17 species of frogs in the Ranidae, a speciose and cosmopolitan family facing widespread pathogen infections and declines. We find high levels of genetic variation concentrated in the Peptide Binding Region (PBR) of the exon...
June 3, 2017: Developmental and Comparative Immunology
https://www.readbyqxmd.com/read/28585437/a-new-species-of-the-genus-amolops-anura-ranidae-from-high-altitude-sichuan-southwestern-china-with-a-discussion-on-the-taxonomic-status-of-amolops-kangtingensis
#11
Liang Fei, Chang-Yuan Ye, Yu-Fan Wang, Ke Jiang
A new species of the genus Amolops Cope, 1865 is described from Xinduqiao, Kangding, Sichuan. It was previously identified as Amolops kangtingensis, which is synonymized to Amolops mantzorum in this study. The new species, Amolops xinduqiao sp. nov., is distinguished from all other congeners by the following combination of characters: (1) medium body size, adult males SVL 41.2-47.5 mm ( n=15, average 43.9 mm), adult females SVL 48.5-56.6 mm ( n=15, average 52.5 mm); (2) head length equal to width or slightly wider than long; (3) tympanum small, but distinct; (4) vomerine teeth in two tiny rows, separated by a space about one vomerine teeth row; (5) bony projections on lower jaw absent; (6) dorsolateral folds usually absent; (7) tarsal folds or glands on tarsus absent; (8) circummarginal groove on disc of finger I absent; (9) tibiotarsal articulation reaching nostril or beyond; (10) webs of toe IV reaching to distal articulation, other toes fully webbed to disc; and (11) vocal sac absent in males...
May 18, 2017: Zoological Research
https://www.readbyqxmd.com/read/28476494/diversity-and-phylogeography-of-northeast-asian-brown-frogs-allied-to-rana-dybowskii-anura-ranidae
#12
Bao-Tian Yang, Yu Zhou, Mi-Sook Min, Masafumi Matsui, Bing-Jun Dong, Pi-Peng Li, Jonathan J Fong
We investigated the species diversity and phylogeography of the Northeast Asian brown frogs allied to Rana dybowskii (the R. dybowskii species complex: R. dybowskii, R. pirica, and R. uenoi) using four mitochondrial and three nuclear loci. Phylogenetic analyses confirmed the existence of three distinct species in this complex; using extensive molecular data, we confirm the validity of Rana uenoi recognized as a distinct species, and infer R. dybowskii and R. pirica to be sister species. Also, we included populations from previously unsampled regions in Northeast China, and identified them to be R...
July 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28466247/is-trace-element-concentration-correlated-to-parasite-abundance-a-case-study-in-a-population-of-the-green-frog-pelophylax-synkl-hispanicus-from-the-neto-river-calabria-southern-italy
#13
Carlo De Donato, Donatella Barca, Concetta Milazzo, Raffaella Santoro, Gianni Giglio, Sandro Tripepi, Emilio Sperone
Bioaccumulation of 13 trace elements in the livers of 38 Pelophylax sinkl. hispanicus (Ranidae) and its helminth communities were studied and compared among three sites, each with a different degree of pollution along River Neto (south Italy) during September, 2014. Trace element concentrations in water and liver were measured using inductively coupled plasma mass spectrometry. For most elements, the highest concentration was recorded in the frogs inhabiting the third site, the one with the highest degree of pollution...
June 2017: Parasitology Research
https://www.readbyqxmd.com/read/28429172/a-new-species-of-haematoloechus-looss-1899-digenea-plagiorchioidea-haematoloechidae-a-parasite-of-rana-psilonota-webb-and-r-zweifeli-hillis-frost-webb-anura-ranidae-in-mexico
#14
Virginia León-Règagnon, Ángeles R Romero-Mayén
During an inventory of the helminths of amphibians in Mexico, specimens of an undescribed species of Haematoloechus Looss, 1899 (Digenea: Haematoloechidae) were collected from the lungs of frogs of the "tarahumarae" group in western México. Haematoloechus longicollum n. sp. differs from other known species of Haematoloechus by the combination of the following characters: body elongate and slender in the preovarian region and broad and blunt in the postovarian region, ovary separated from the ventral sucker more than twice the ovary length, oral sucker to pharynx length ratio 1:0...
June 2017: Systematic Parasitology
https://www.readbyqxmd.com/read/28402481/identification-and-functional-analyses-of-novel-antioxidant-peptides-and-antimicrobial-peptides-from-skin-secretions-of-four-east-asian-frog-species
#15
Xiao Wang, Shuguang Ren, Chao Guo, Weiqi Zhang, Xiaoli Zhang, Baowen Zhang, Sihan Li, Jian Ren, Yuhong Hu, Hui Wang
In the present study, we identified 50 peptides that are classified into 21 peptide families with antioxidant and/or antimicrobial activity from Amolops daiyunensis, Pelophylax hubeiensis, Hylarana maosuoensis and Nanorana pleskei, which belong to four different genera in the Ranidae and Dicroglossidae families. These four frog species were found for the first time to express antioxidant peptides (AOPs) and antimicrobial peptides (AMPs). These peptides include seven newly discovered families daiyunin-1, daiyunin-2, daiyunin-3, maosonensis-1MS1, pleskein-1, pleskein-2, and pleskein-3...
June 1, 2017: Acta Biochimica et Biophysica Sinica
https://www.readbyqxmd.com/read/28369142/phylogeny-and-biogeography-of-south-chinese-brown-frogs-ranidae-anura
#16
Yu Zhou, Sirui Wang, Hedan Zhu, Pipeng Li, Baotian Yang, Jianzhang Ma
Few studies have explored the role of Cenozoic tectonic evolution in shaping the patterns and processes of extant animal distributions in and around East Asia. In this study, we selected South Chinese brown frogs as a model to examine the phylogenetic and biogeographical consequences of Miocene tectonic events within South China and its margins. We used mitochondrial and nuclear molecular data to reconstruct phylogenetic interrelationships among Chinese brown frogs using Bayesian and maximum likelihood analyses...
2017: PloS One
https://www.readbyqxmd.com/read/28348925/neogene-amphibians-and-reptiles-caudata-anura-gekkota-lacertilia-and-testudines-from-the-south-of-western-siberia-russia-and-northeastern-kazakhstan
#17
Davit Vasilyan, Vladimir S Zazhigin, Madelaine Böhme
BACKGROUND: The present-day amphibian and reptile fauna of Western Siberia are the least diverse of the Palaearctic Realm, as a consequence of the unfavourable climatic conditions that predominate in this region. The origin and emergence of these herpetofaunal groups are poorly understood. Aside from the better-explored European Neogene localities yielding amphibian and reptile fossil remains, the Neogene herpetofauna of Western Asia is understudied. The few available data need critical reviews and new interpretations, taking into account the more recent records of the European herpetofauna...
2017: PeerJ
https://www.readbyqxmd.com/read/28334717/a-tandemly-arranged-pattern-of-two-5s-rdna-arrays-in-amolops-mantzorum-anura-ranidae
#18
Ting Liu, Menghuan Song, Yun Xia, Xiaomao Zeng
In an attempt to extend the knowledge of the 5S rDNA organization in anurans, the 5S rDNA sequences of Amolops mantzorum were isolated, characterized, and mapped by FISH. Two forms of 5S rDNA, type I (209 bp) and type II (about 870 bp), were found in specimens investigated from various populations. Both of them contained a 118-bp coding sequence, readily differentiated by their non-transcribed spacer (NTS) sizes and compositions. Four probes (the 5S rDNA coding sequences, the type I NTS, the type II NTS, and the entire type II 5S rDNA sequences) were respectively labeled with TAMRA or digoxigenin to hybridize with mitotic chromosomes for samples of all localities...
2017: Cytogenetic and Genome Research
https://www.readbyqxmd.com/read/28145223/light-and-transmission-electron-microscopy-of-cepedea-longa-opalinidae-from-fejervarya-limnocharis
#19
Can Li, Xiao Jin, Ming Li, Guitang Wang, Hong Zou, Wenxiang Li, Shangong Wu
Cepedea longa Bezzenberger, 1904, collected from Fejervarya limnocharis (Amphibia, Anura, Ranidae) from Honghu Lake, Hubei Province, China in May-July 2016, is described at both light and transmission electron microscope levels. This is the first electron microscopic study of this species. Cepedea longa possesses a developed fibrillar skeletal system, composed of longitudinal fibrillar bands and transversal fibrils as well as numerous thin microfibrils dispersed in the endoplasm, which may play an important role in morphogenesis and offer some resilience to deformations of the cell...
2017: Parasite: Journal de la Société Française de Parasitologie
https://www.readbyqxmd.com/read/28095428/linking-ecology-and-epidemiology-to-understand-predictors-of-multi-host-responses-to-an-emerging-pathogen-the-amphibian-chytrid-fungus
#20
Stephanie S Gervasi, Patrick R Stephens, Jessica Hua, Catherine L Searle, Gisselle Yang Xie, Jenny Urbina, Deanna H Olson, Betsy A Bancroft, Virginia Weis, John I Hammond, Rick A Relyea, Andrew R Blaustein
Variation in host responses to pathogens can have cascading effects on populations and communities when some individuals or groups of individuals display disproportionate vulnerability to infection or differ in their competence to transmit infection. The fungal pathogen, Batrachochytrium dendrobatidis (Bd) has been detected in almost 700 different amphibian species and is implicated in numerous global amphibian population declines. Identifying key hosts in the amphibian-Bd system-those who are at greatest risk or who pose the greatest risk for others-is challenging due in part to many extrinsic environmental factors driving spatiotemporal Bd distribution and context-dependent host responses to Bd in the wild...
2017: PloS One
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