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https://www.readbyqxmd.com/read/28938777/role-of-vasoactive-intestinal-peptide-during-the-transition-from-incubation-behavior-to-rearing-behavior-in-the-female-native-thai-chicken
#1
S Namken, P Sinpru, B Kamkrathok, N Sartsoongnoen, Y Chaiseha
It is well documented that vasoactive intestinal peptide (VIP) is an avian prolactin-releasing factor, regulating the reproductive cycle, that initiates and maintains incubation behavior in avian species. Native Thai chicken has strong maternal behaviors. Thus, it is an excellent animal model to study this phenomenon. Changes in the numbers of VIP neurons within the nucleus inferioris hypothalami (IH) and nucleus infundibuli hypothalami (IN) are associated with maternal behaviors in the native Thai chicken...
October 1, 2017: Poultry Science
https://www.readbyqxmd.com/read/28938024/perspectives-on-invasive-amphibians-in-brazil
#2
Lucas Rodriguez Forti, C Guilherme Becker, Leandro Tacioli, Vânia Rosa Pereira, André Cid F A Santos, Igor Oliveira, Célio F B Haddad, Luís Felipe Toledo
Introduced species have the potential to become invasive and jeopardize entire ecosystems. The success of species establishing viable populations outside their original extent depends primarily on favorable climatic conditions in the invasive ranges. Species distribution modeling (SDM) can thus be used to estimate potential habitat suitability for populations of invasive species. Here we review the status of six amphibian species with invasive populations in Brazil (four domestic species and two imported species)...
2017: PloS One
https://www.readbyqxmd.com/read/28938012/f-map-a-bayesian-approach-to-infer-the-gene-regulatory-network-using-external-hints
#3
Maryam Shahdoust, Hamid Pezeshk, Hossein Mahjub, Mehdi Sadeghi
The Common topological features of related species gene regulatory networks suggest reconstruction of the network of one species by using the further information from gene expressions profile of related species. We present an algorithm to reconstruct the gene regulatory network named; F-MAP, which applies the knowledge about gene interactions from related species. Our algorithm sets a Bayesian framework to estimate the precision matrix of one species microarray gene expressions dataset to infer the Gaussian Graphical model of the network...
2017: PloS One
https://www.readbyqxmd.com/read/28935604/molecular-features-and-physiological-roles-of-k-cl-cotransporter-4-kcc4
#4
REVIEW
A A Marcoux, A P Garneau, R Frenette-Cotton, S Slimani, F Mac-Way, P Isenring
A K(+)-Cl(-) cotransport system was documented for the first time during the mid-seventies in sheep and goat red blood cells. It was then described as a Na(+)-independent and ouabain-insensitive ion carrier that could be stimulated by cell swelling and N-ethylmaleimide (NEM), a thiol-reacting agent. Twenty years later, this system was found to be dispensed by four different isoforms in animal cells. The first one was identified in the expressed sequence tag (EST) database by Gillen et al. based on the assumption that it would be homologous to the Na(+)-dependent K(+)-Cl(-) cotransport system for which the molecular identity had already been uncovered...
September 18, 2017: Biochimica et Biophysica Acta
https://www.readbyqxmd.com/read/28935556/altitudinal-variation-and-bio-climatic-variables-influencing-the-potential-distribution-of-culicoides-orientalis-macfie-1932-suspected-vector-of-bluetongue-virus-across-the-north-eastern-himalayan-belt-of-sikkim
#5
Emon Mukhopadhyay, Surajit Hazra, Goutam Kumar Saha, Dhriti Banerjee
Culicoides orientalis was first recorded from Sikkim, in the year 1963, but no evidence based disease outbreak were available. In the last 50 years, 260 Bluetongue disease outbreaks caused by Culicoides species have been evidenced from India. Moreover, in recent years with increase of average temperature worldwide and increase in longevity of arthropod vectors like Culicoides along with a geographical range shift to new suitable warmer regions has increased the potentiality of vector borne disease outbreak throughout the world...
September 18, 2017: Acta Tropica
https://www.readbyqxmd.com/read/28935234/fractal-rules-in-brain-networks-signatures-of-self-organization
#6
Soibam Shyamchand Singh, Dineshchandra Haobijam, Md Zubbair Malik, Romana Ishrat, R K Brojen Singh
We study brain network data of three species, namely, C. elegans, cat and macaque monkey within the framework of network theory and Potts Hamiltonian model, and explore rich fractal nature in it, which could be an important signature of self-organization, and a simple rule to be obeyed in complex patterns of brain networks. Further, this fractal behaviors in topological parameters of brain networks at various network levels could be an indicator of systems level organization in complicated brain functionality...
September 18, 2017: Journal of Theoretical Biology
https://www.readbyqxmd.com/read/28931739/what-drives-the-spatial-distribution-and-dynamics-of-local-species-richness-in-tropical-forest
#7
Thorsten Wiegand, Felix May, Martin Kazmierczak, Andreas Huth
Understanding the structure and dynamics of highly diverse tropical forests is challenging. Here we investigate the factors that drive the spatio-temporal variation of local tree numbers and species richness in a tropical forest (including 1250 plots of 20 × 20 m(2)). To this end, we use a series of dynamic models that are built around the local spatial variation of mortality and recruitment rates, and ask which combination of processes can explain the observed spatial and temporal variation in tree and species numbers...
September 27, 2017: Proceedings. Biological Sciences
https://www.readbyqxmd.com/read/28930977/fourier-based-diffraction-analysis-of-live-caenorhabditis-elegans
#8
Jenny Magnes, Harold M Hastings, Kathleen M Raley-Susman, Clara Alivisatos, Adam Warner, Miranda Hulsey-Vincent
This manuscript describes how to classify nematodes using temporal far-field diffraction signatures. A single C. elegans is suspended in a water column inside an optical cuvette. A 632 nm continuous wave HeNe laser is directed through the cuvette using front surface mirrors. A significant distance of at least 20-30 cm traveled after the light passes through the cuvette ensures a useful far-field (Fraunhofer) diffraction pattern. The diffraction pattern changes in real time as the nematode swims within the laser beam...
September 13, 2017: Journal of Visualized Experiments: JoVE
https://www.readbyqxmd.com/read/28930619/asiatic-acid-nullified-aluminium-toxicity-in-in-vitro-model-of-alzheimer-s-disease
#9
Mashoque Ahmad Rather, Arokiasamy Justin Thenmozhi, Thamilarasan Manivasagam, Jegadeesan Nataraj, Musthafa Mohamed Essa, Saravana Babu Chidambaram
Aluminium (Al) is a ubiquitously distributed environmental toxicant that lacks biological functions; however, its accumulation in the brain has been demonstrated to be linked to several neuropathological conditions particularly Alzheimer's disease (AD). Asiatic acid (AA), a triterpene extracted from Centella asiatica, has been reported to cross the blood brain barrier and also displayed antioxidant and neuroprotective activities. The present study was aimed to explore the neuroprotective effect of AA against aluminium maltolate (Al(mal)3) induced neurotoxicity by assessing cell viability, mitochondrial membrane potential, levels of reactive oxygen species (ROS), DNA damage and apoptosis (Hoechst and dual staining, comet assay; expressions of pro-apoptotic, anti-apoptotic and signaling indices) via AKT/GSK-3β signaling pathway in SH-SY 5Y  neuroblastoma cells...
January 1, 2018: Frontiers in Bioscience (Elite Edition)
https://www.readbyqxmd.com/read/28929352/the-relative-sensitivity-of-freshwater-species-to-antimony-iii-implications-for-water-quality-guidelines-and-ecological-risk-assessments
#10
Maximilian Obinna Obiakor, Matthew Tighe, Zhen Wang, Chigozie Damian Ezeonyejiaku, Lily Pereg, Susan C Wilson
Antimony (Sb) is a pollutant in many jurisdictions, yet its threat to aquatic biota is unclear. Water quality guidelines (WQGs) for Sb are not well established and large uncertainty factors are commonly applied in derivation. We constructed freshwater species sensitivity distributions (SSDs) for Sb(III) using available acute toxicity data sourced from temperate and tropical regional studies. A tiered ecological risk assessment (ERA) approach using risk quotients (RQs) was applied for characterisation of risks presented by Sb(III) concentrations measured in the freshwater environment...
September 19, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/28927433/modelling-the-current-distribution-and-predicted-spread-of-the-flea-species-ctenocephalides-felis-infesting-outdoor-dogs-in-spain
#11
Rosa Gálvez, Vicenzo Musella, Miguel A Descalzo, Ana Montoya, Rocío Checa, Valentina Marino, Oihane Martín, Giuseppe Cringoli, Laura Rinaldi, Guadalupe Miró
BACKGROUND: The cat flea, Ctenocephalides felis, is the most prevalent flea species detected on dogs and cats in Europe and other world regions. The status of flea infestation today is an evident public health concern because of their cosmopolitan distribution and the flea-borne diseases transmission. This study determines the spatial distribution of the cat flea C. felis infesting dogs in Spain. Using geospatial tools, models were constructed based on entomological data collected from dogs during the period 2013-2015...
September 19, 2017: Parasites & Vectors
https://www.readbyqxmd.com/read/28926580/simple-yet-effective-historical-proximity-variables-improve-the-species-distribution-models-for-invasive-giant-hogweed-heracleum-mantegazzianum-s-l-in-poland
#12
Piotr Mędrzycki, Ingeborga Jarzyna, Artur Obidziński, Barbara Tokarska-Guzik, Zofia Sotek, Piotr Pabjanek, Adam Pytlarczyk, Izabela Sachajdakiewicz
Species distribution models are scarcely applicable to invasive species because of their breaking of the models' assumptions. So far, few mechanistic, semi-mechanistic or statistical solutions like dispersal constraints or propagule limitation have been applied. We evaluated a novel quasi-semi-mechanistic approach for regional scale models, using historical proximity variables (HPV) representing a state of the population in a given moment in the past. Our aim was to test the effects of addition of HPV sets of different minimal recentness, information capacity and the total number of variables on the quality of the species distribution model for Heracleum mantegazzianum on 116000 km2 in Poland...
2017: PloS One
https://www.readbyqxmd.com/read/28926149/speciation-below-ground-tempo-and-mode-of-diversification-in-a-radiation-of-endogean-ground-beetles
#13
Carmelo Andújar, Sergio Pérez-González, Paula Arribas, Juan P Zaballos, Alfried P Vogler, Ignacio Ribera
Dispersal is a critical factor determining the spatial scale of speciation, which is constrained by the ecological characteristics and distribution of a species' habitat and the intrinsic traits of species. Endogean taxa are strongly affected by the unique qualities of the below-ground environment and its effect on dispersal, and contrasting reports indicate either high dispersal capabilities favoured by small body size and mediated by passive mechanisms, or low dispersal due to restricted movement and confinement inside the soil...
September 19, 2017: Molecular Ecology
https://www.readbyqxmd.com/read/28924498/habitat-suitability-density-relationship-in-an-endangered-woodland-species-the-case-of-the-blue-chaffinch-fringilla-polatzeki
#14
Luis M Carrascal, Ángel C Moreno, Alejandro Delgado, Víctor Suárez, Domingo Trujillo
BACKGROUND: Understanding constraints to the distribution of threatened species may help to ascertain whether there are other suitable sectors for reducing the risks associated with species that are recorded in only one protected locality, and to inform about the suitability of other areas for reintroduction or translocation programs. METHODS: We studied the Gran Canaria blue chaffinch (Fringilla polatzeki), a habitat specialist endemic of the Canary Islands restricted to the pine forest of Inagua, the only area where the species has been naturally present as a regular breeder in the last 25 years...
2017: PeerJ
https://www.readbyqxmd.com/read/28924497/phylogeographic-investigation-and-ecological-niche-modelling-of-the-endemic-frog-species-nanorana-pleskei-revealed-multiple-refugia-in-the-eastern-tibetan-plateau
#15
Bin Wang, Feng Xie, Jiannan Li, Gang Wang, Cheng Li, Jianping Jiang
The largest plateau Tibetan Plateau supplied an excellent opportunity to investigate the influence of the Pleistocene events on the high-elevation species. To test for the alternative hypotheses of Pleistocene glacial refugia, we used partial sequences of two mitochondrial genes and one nuclear gene to examine the phylogeographic patterns of the endemic frog species Nanorana pleskei across its known range in the eastern Tibetan Plateau, and conducted species distribution modelling (SDM) to explore changes of its distribution range through current and paleo periods...
2017: PeerJ
https://www.readbyqxmd.com/read/28921859/trophic-interaction-modifications-an-empirical-and-theoretical-framework
#16
J Christopher D Terry, Rebecca J Morris, Michael B Bonsall
Consumer-resource interactions are often influenced by other species in the community. At present these 'trophic interaction modifications' are rarely included in ecological models despite demonstrations that they can drive system dynamics. Here, we advocate and extend an approach that has the potential to unite and represent this key group of non-trophic interactions by emphasising the change to trophic interactions induced by modifying species. We highlight the opportunities this approach brings in comparison to frameworks that coerce trophic interaction modifications into pairwise relationships...
October 2017: Ecology Letters
https://www.readbyqxmd.com/read/28920507/navigating-the-structure-function-evolutionary-relationship-of-csaa-chaperone-in-archaea
#17
Archana Sharma, Shikha Rani, Manisha Goel
CsaA is a protein involved in the post-translational translocation of proteins across the cytoplasmic membrane. It is considered to be a functional homolog of SecB which participates in the Sec-dependent translocation pathway in an analogous manner. CsaA has also been reported to act as a molecular chaperone, preventing aggregation of unfolded proteins. It is essentially a prokaryotic protein which is absent in eukaryotes, but found extensively in bacteria and earlier thought to be widely present in archaea...
September 18, 2017: Critical Reviews in Microbiology
https://www.readbyqxmd.com/read/28919506/the-role-of-climatic-cycles-and-trans-saharan-migration-corridors-in-species-diversification-biogeography-of-psammophis-schokari-group-in-north-africa
#18
Duarte Vasconcelos Gonçalves, Fernando Martínez-Freiría, Pierre-André Crochet, Philippe Geniez, Salvador Carranza, José Carlos Brito
Highlands, hydrographic systems and coastal areas have been hypothesised to form corridors across the hyperarid Sahara desert in North Africa, allowing dispersal and gene flow for non-xeric species. Here we aim to provide a genetic test for the trans-Saharan corridor model, and predict the location and stability of ecological-corridors, by combining phylogeography and palaeoclimatic modelling. The model was the Psammophis schokari (Schokari sand racer) group, fast-moving and widely distributed generalist colubrids occurring mostly in arid and semiarid scrublands...
September 14, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28919503/a-multilocus-phylogeny-of-the-genus-sarcohyla-anura-hylidae-and-an-investigation-of-species-boundaries-using-statistical-species-delimitation
#19
Itzue W Caviedes Solis, Adrián Nieto-Montes de Oca
The genus Sarcohyla is composed by 24 species endemic to México. Despite the large number of phylogenetic studies focusing on the family Hylidae, the relationships among the species of Sarcohyla are still poorly known, and the scarce numbers of specimens and tissue samples available for some of the species has hampered an appropriate phylogenetic analysis. We present the most comprehensive molecular phylogenetic study of Sarcohyla to date. We included 17 species of the genus Sarcohyla using data from two mitochondrial (ND1 and 12S) and three nuclear genes (Rag-1, Rhod, and POMc)...
September 14, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28918628/breaking-benzene-aromaticity-computational-insights-into-the-mechanism-of-the-tungsten-containing-benzoyl-coa-reductase
#20
Martin Culka, Simona G Huwiler, Matthias Boll, G Matthias Ullmann
Aromatic compounds are environmental pollutants with toxic and carcinogenic properties. Despite the stability of aromatic rings, bacteria are able to degrade the aromatic compounds into simple metabolites and use them as growth substrates under oxic or even under anoxic conditions. In anaerobic microorganisms, most monocyclic aromatic growth substrates are converted to the central intermediate benzoyl-coenzyme A, which is enzymatically reduced to cyclohexa-1,5-dienoyl-CoA. The strcitly anaerobic bacterium \textit{Geobacter metallireducens} uses the class II benzoyl-CoA reductase complex for this reaction...
September 18, 2017: Journal of the American Chemical Society
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