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Unraveling the morphological patterns of a subantarctic eelpout:a geometric morphometric approach

Integrative Zoology 2023年第2期18卷 372-384页

作者： Fernanda S.ORREGO Mathias HÜNE hugo a.benítez Mauricio F.LANDAETA Laboratorio de Ictiología e Interacciones Biofísicas(LABITI) Instituto de BiologíaFacultad de CienciasUniversidad de ValparaísoValparaísoChile Centro de Investigación para la Conservación de los Ecosistemas Australes(ICEA) Punta ArenasChile Laboratorio de Ecología y Morfometría Evolutiva Centro de Investigación de Estudios Avanzados del MauleUniversidad Católica del MauleTalcaChile Centro de Observación Marino para Estudios de Riesgos del Ambiente Costero(COSTA-R) Universidad de ValparaísoViña del MarChile Millennium Nucleus for Ecology and Conservation of Temperate Mesophotic Reef Ecosystems(NUTME) Millennium Institute Biodiversity of Antarctic and Subantarctic Ecosystems(BASE) SantiagoChile

Phenotypic variation in organisms depends on the genotype and the environmental constraints of the habitat that they ***,for marine species inhabiting contrasting aquatic conditions,it is expected toﬁnd covari-ation between the shape and its spatial *** studied the morphology of the head and cephalic sensory canals of the eelpout Austrolycus depressiceps(4.5–22.5 cm TL)across its latitudinal distribution in South Paciﬁc(45°S–55°S).Geometric morphometric analyses show that the shape varied from individuals with larger snout and an extended suborbital canal to individuals with shorter snouts and frontally compressed suborbital *** was size variation across the sampled populations,but that size does not have a clear latitudinal *** 8%of the shape variation relates to this size variation(allometry),represented by a decrease in the relative size of the eye,and a depression of the posterior margin of the *** were spatial differences in the shape of the head,but these differences were probably caused by allometric ***,2 of the canals of the cephalic lateralis pores and the head shape showed modularity in its *** study shows that the morphology of marineﬁsh with a shallow distribution varies across distances of hundreds of kilometers(i.e.,phenotypic modulation).

关键词： Austrolycus depressiceps geometric morphometrics morphology phenotype spatial distribution

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EXISTENCE AND STABILITY RESULTS FOR GENERALIZED FRACTIONAL DIFFERENTIAL EQUATIONS

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Acta Mathematica Scientia 2020年第1期40卷 141-154页

作者： a.ben MAKHLOUF D.BOUCENNA M.A.HAMMAMI Department of Mathematics College of SciencesJouf UniversityAljoufSaudi Arabia Department of Mathematics Faculty of Sciences of SfaxBP 11713000 SfaxTunisia Higher School for Professors of Technological Education SkikdaAlgeria

In this paper,a sufficient conditions to guarantee the existence and stability of solutions for generalized nonlinear fractional differential equations of orderα(1<α<2)are *** main results are obtained by using Krasnoselskii's fixed point theorem in a weighted Banach *** examples are given to demonstrate the validity of the proposed results.

关键词： nonlinear fractional differential equations stability analysis generalized fractional derivative Krasnoselskii's fixed point theorem

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Home range variability,spatial aggregation,and excursions of Akodon azarae and Oligoryzomys flavescens in Pampean agroecosystems

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Integrative Zoology 2020年第5期15卷 401-415页

作者： Irene GOROSITO Ailén benÍtez Maria BUSCH Laboratorio de Ecología de PoblacionesFacultad de Ciencias Exactas y NaturalesUniversidad de Buenos Airesand Instituto de EcologíaGenética y Evolución de Buenos AiresConsejo Nacional de Investigaciones Científicas y TécnicasBuenos AiresArgentina Laboratorio de Ecología de Poblaciones Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos AiresBuenos AiresArgentina Laboratorio de Ecología de Poblaciones Facultad de Ciencias Exactas y NaturalesUniversidad de Buenos Airesand Instituto de EcologíaGenética y Evolución de Buenos AiresConsejo Nacional de Investigaciones Científicas y TécnicasBuenos AiresArgentina

Rodents are reservoirs of various types of hantavirus,some of which are agents of hantavirus pulmonary syndrome in *** hantavirus is associated with a single rodent host species but successive spill-over events may eventually lead to host-switching and new species’becoming host of a given *** study aims to gain an understanding of the spatial ecology of two hantavirus-host species,Akodon azarae,and Oligoryzomys flavescens,by identifying factors modulating their home range sizes and stability,and by evaluating intra-and interspecific spatial aggregation for these species and a third one—Oxymycterus rufus—living in *** this,eleven capture-mark-recapture surveys were carried out,spanning 22 *** found that *** males have larger and more mobile home ranges than females,independently of the ***,males could likely have a more relevant role in the transmission of hantavirus because of their greater exposure both to a higher number of contacts between individuals and viral contamination of the ***,*** individuals showed negligible displacements of their home range through time,which could limit the range of hantavirus spread in host *** *** is host to Lechiguanas hantavirus(pathogenic to humans)this result encompasses epidemiological relevance,for it may imply the existence of local foci of ***,individuals of both species performed excursions outside their home *** events could enable hantavirus spread over distances beyond the normal range of movements and lead to new hantavirus outbreaks in formerly non-infected rodent populations,favoring the persistence of the virus in nature.

关键词： hantavirus home range intra-and interspecific contact rodent spatial ecology

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Conversion of Andean montane forest to exotic forest plantation modifies soil physicochemical properties in the buffer zone of Ecuador's Podocarpus National Park

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Forest Ecosystems 2022年第6期9卷 802-812页

作者： Vinicio Carrion-Paladines Angel benítez Roberto García-Ruíz Departamento de Ciencias Biologicas y Agropecuarias Universidad Tecnica Particular de LojaSan Cayetano Alto s/nC.P.1101608LojaEcuador Departamento de Biología Animal Biología Vegetal y EcologíaSeccion de EcologíaUniversidad de JaenCampus Las LagunillasEdificio Ciencias Experimentales y de la Salud(B3)23071JaenSpain

Background:Andean montane forests(AMF)are biodiversity hotspots that provide fundamental hydrological services as well as carbon storage and *** recent decades,southern Ecuador AMFs have been seriously threatened by increased logging and conversion to forest plantations with exotic *** this context,our main objective was to evaluate the effects of AMF conversion to forest plantations on soil physicochemical properties in the buffer zone(Bz)of the Podocarpus National Park(PNP),in southern *** this purpose,random samples were taken at a depth of 0-10 cm in four plots in each contrast zone and analyzed for bulk density,porosity,textural class,leaf litter depth,soil pH,as well as the contents of organic matter(SOM),soil organic carbon(SOC),total nitrogen,and available phosphorus and ***:The results indicate that the conversion of AMFs produces an increase in bulk density and a decrease in SOM,SOC,and total nitrogen contents,thus modifying soil properties,which could result in a decrease in water regulation capacity and produce an increased risk of soil *** accelerates degradation processes,as well as threatens shortages of the drinking water ***:This study can help decision-makers to implement soil management plans in the Bz of the PNP,based on the implementation of new regulations,where the conservation of AMF is *** addition,it is recommended to apply environmental restoration strategies in the anthropized areas of the AMF,as well as in the areas with exotic eucalyptus and pine plantations.

关键词： Andean montane forests Land use conversion Edaphic properties

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Some additive results on Drazin inverse

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Applied Mathematics(A Journal of Chinese Universities) 2015年第4期30卷 479-490页

作者： LIU Xiao-ji QIN Xiao-lan Julio benítez Faculty of Science Guangxi University for Nationalities Universidad Politécnica de Valencia Instituto de Matemática Multidisciplinar

In this paper, we investigate additive results of the Drazin inverse of elements in a ring R. Under the condition ab = ha, we show that a ＋ b is Drazin invertible if and only if aaD （a ＋ b） is Drazin invertible, where the superscript D means the Drazin inverse. Furthermore we find an expression of （a ＋ b）D. As an application we give some new representations for the Drazin inverse of a 2 × 2 block matrix.

关键词： Drazin inverse ring block matrix.

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Reducing dietary sodium of dairy cows fed a low-roughages diet affect intake and feed efficiency,but not yield

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Animal Nutrition 2023年第1期12卷 1-6页

作者： Yehoshav a.ben Meir Yoav Shaani Daniel Bikel Yuri Portnik Shamai Jacoby Uzi Moallem Joshua Miron Eyal Frank Department of Ruminant Science Institute of Animal ScienceAgricultural Research Organization(ARO)Rishon Lezion 7528809Israel Department of Animal Production Extension ServiceMinistry of AgricultureRishon Lezion 7528809Israel

Wastewater from dairy farms has become a major environmental and economical *** residue in treated and untreated wastewater from dairy farms used for irrigation can lead to soil and groundwater salinization,with the risk of soil *** examined the effect of reducing sodium fed to mid to late lactating cows from 0.61%(high sodium[HS])to 0.45%(low sodium[LS])of dry matter on dry matter intake(DMI),milk and milk-component yields,eating behavior,apparent total track digestibility,feed efficiency,and sodium excretion into the *** randomly assigned 28 multiparous high-yielding(>35 kg milk/d)cows to 1 of 2 treatment groups(LS or HS)in a crossover design,with 7 d of adaptation and 28 d of data *** sodium in the diet reduced sodium intake from 171 to 123 g/d while lowering sodium excreted in the manure by 22%.Energy corrected milk(ECM)yield(37.4 kg/d)and sodium excretion in the milk(33.7 g/d)were similar for both *** DMI of LS cows was lower than that of HS cows(27.3 vs.28 kg/d)and consequently,feed efficiency of the LS cows was higher(1.40 vs.1.35 ECM/DMI).Eating rate,meal and visit frequency,and eating time were similar for both treatments;meal and visit duration were longer for the HS cows,and meal and visit sizes tended to be *** of DM and amylase-treated neutral detergent fiber remained *** on the results of this study,and discussed considerations,we recommend lowering the dietary sodium content for mid to late lactating cows in commercial herds to 0.52%of DM,in order to reduce sodium excretion to the environment via urine.

关键词： Mineral absorption Sodium Eating behavior Environmentally friendly dairy farm

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An Improved Experiment to Determine the‘Past of a Particle’in the Nested Mach-Zehnder Interferometer

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Chinese Physics Letters 2017年第2期34卷 4-6页

作者： a.ben-Israel L.Knips J.Dziewior J.Meinecke A.Danan H.Weinfurter L.Vaidman Raymond and Beverly Sackler School of Physics and Astronomy Tel-A viv UniversityTel-A viv 69978Israel Max-Planck-Institut für Quantenoptik Hans-Kopfermann-Straβe 1Garching 85748Germany Department für Physik Ludwig-Maxirnilians-UniversitatMunchen 80797Germany

We argue that the modification proposed by Li et al. [Chin. Phys. Lett. 32 （2015）050303] to the experiment of Danan et al. [Phys. Rev. Lett. 111 （2013） 240402] does not test the past of the photon as characterized by local weak traces. Instead of answering the questions：（i） were the photons in A？（ii） were the photons in B？ and （iii） were the photons in C？ the proposed experiment measures a degenerate operator answering the questions：（i） were the photons in A？ and （ii） were the photons in B and C together？ A negative answer to the last question does not tell us if photons were present in B or C. On the other hand, a simple variation of the proposal by Li et al. does provide conceptually better evidence for the past of the pre- and post-selected photon, but this evidence will be in agreement with the results of Danan et al.

关键词： Li In in the Nested Mach-Zehnder Interferometer An Improved Experiment to Determine the

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Length–mass allometries in amphibians

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Integrative Zoology 2018年第1期13卷 36-45页

作者： Luca SANTINI Ana.benÍtez-LÓPEZ Gentile Francesco FICETOLA Mark A.J.HUIJBREGTS Department of Environmental Science Institute for Wetland and Water ResearchFaculty of ScienceRadboud UniversityNijmegenthe Netherlands Department of Bioscience University of MilanMilanItaly Alpine Ecology Laboratory Grenoble Alpes UniversityGrenobleFrance PBL Netherlands Environmental Assessment Agency The Haguethe Netherlands

Body mass is rarely recorded in amphibians,and other body measurements(*** to vent length,SVL)are generally collected ***,length measurements,when used as proxies of body mass in comparative analyses,are problematic if different taxa and morphotypes are *** developed allometric relationships to derive body mass from SVL *** fitted phylogenetic generalized least square models for frogs(Anura)and salamanders(Caudata)and for several families *** tested whether allometric relationships differed between species with different habitat preferences and between morphs in *** were fitted with SVL-mass measurements for 88 frog and 42 salamander *** assessed the predictive performance of the models by ***,the models showed high explained variance and low forecasting *** differed among semi-aquatic,terrestrial and arboreal frogs,and between paedomorphic and non-paedomorphic *** mass estimates derived from our models allow for comparability of studies on multiple taxa and can be used for testing theories built upon evolutionary and ecological processes which are directly related to body mass.

关键词： Anura body size body weight Caudata SVL

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Removal of heavy metals from aqueous solution by sawdust adsorption

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Journal of Environmental Sciences 2007年第2期19卷 160-166页

作者： BULUT Yasemin tez Zeki Faculty of Arts and Sciences Department of Chemistry University of Dicle21280 DiyarbakirTurkey. Faculty of Techniqual Education Department of Textile Marmara UniversityGztepeIstanbulTurkey

The adsorption of lead, cadmium and nicel from aqueous solution by sawdust of walnut was investigated. The effect of contact time, initial metal ion concentration and temperature on metal ions removal has been studied. The equilibrium time was found to be of the order of 60 min. Kinetics fit pseudo first-order, second-order and intraparticle diffusion models, hence adsorption rate constants were calculated. The adsorption data of metal ions at temperatures of 25, 45 and 60~C have been described by the Freundlich and Langmuir isotherm models. The thermodynamic parameters such as energy, entropy and enthalpy changes for the adsorption of heavy metal ions have also been computed and discussed. Ion exchange is probably one of the major adsorption mechanisms for binding divalent metal ions to the walnut sawdust. The selectivity order of the adsorbent is Pb（I1）~Cd（II）〉Ni（I1）. From these results, it can be concluded that the sawdust of walnut could be a good adsorbent for the metal ions from aqueous solutions.

关键词： adsorption heavy metals sawdust kinetic thermodynamic parameters

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Sources,characteristics,toxicity,and control of ultrafine particles:An overview

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Geoscience Frontiers 2022年第1期13卷 512-526页

作者： Andrea L.Moreno-Ríos Lesly P.Tejeda.benítez Ciro F.Bustillo-Lecompte Department of Civil and Environmental Universidad de la CostaCUCCalle 58#55–66BarranquillaAtlánticoColombia Research Group in Biomedical Toxicological and Environmental Sciences(Biotoxam)University of CartagenaCampus of ZaragocillaCartagenaColombia School of Occupational and Public Health Ryerson University350 Victoria StreetTorontoON M5B 2K3Canada

Air pollution by particulate matter(PM)is one of the main threats to human health,particularly in large cities where pollution levels are continually *** to their source of emission,geography,and local meteorology,the pollutant particles vary in size and *** particles are conditioned to the aerodynamic diameter and thus classified as coarse(2.5–10μm),fine(0.1–2.5μm),and ultrafine(<0.1μm),where the degree of toxicity becomes greater for smaller *** particles can get into the lungs and translocate into vital organs due to their size,causing significant human health ***,PM pollutants have been linked to respiratory conditions,genotoxic,mutagenic,and carcinogenic activity in human *** paper presents an overview of emission sources,physicochemical characteristics,collection and measurement methodologies,toxicity,and existing control mechanisms for ultrafine particles(UFPs)in the last fifteen years.

关键词： Particulate matter Ultrafine particles Air pollution Toxicity Measurement methodologies

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