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Estimating the geographic range of a threatened shark in a data-poor region： Cetorhinus maximus in the South Atlantic Ocean

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Current Zoology 2015年第5期61卷 811-826页

作者： Luis O. LUCIFORA Santiago A. BARBINI Edgardo E. DI GIACOMO Juan A. WAESSLE Daniel E. FIGUEROA Instituto de Biologia Subtropical - Iguazu Consejo Nacional de Investigaciones Cientificas y Tecnicas Universidad Nacional de Misiones Puerto Iguazu Misiones Argentina laboratorio de Ictiologia Instituto de Investigaciones Marinas y Costeras Consejo Nacional de Investigaciones Cientificas y Tecnicas Universidad Nacional de Mar del Plata Mar del Plata Provincia de Buenos Aires Argentina Grupo Condros Instituto de Biologia Marina y Pesquera "Almirante Stomi" Universidad Nacional del Comahue San Antonio Oeste Rio Negro Argentina Instituto Nacional de Investigacion y desarrollo Pesquero Mar del Plata Provincia de Buenos Aires Argentina

The distribution of the planktivorous basking shark Cetorhinus maximus is influenced by zooplankton abundance at small scales and temperature at medium scales in the North Atlantic. Here, we estimate the distribution of basking sharks on South Atlantic continental shelves, and the relative importance of chlorophyll concentration, as a proxy for zooplankton abun- dance, and temperature in determining habitat suitability for basking sharks at large scales. We used maximum entropy （MaxEnt） and maximum likelihood （MaxLike） species distribution modelling to test three hypotheses： the distribution of basking sharks is determined by （1） temperature, （2） chlorophyll concentration, or （3） both chlorophyll and temperature, while considering other factors, such as oxygen and salinity. Off South America, basking shark habitat included subtropical, temperate and cool-temperate waters between approximately 20°S and 55°S. Off Africa, basking shark habitat was limited to cool-temperate waters off Namibia and southern South Africa. MaxLike models bad a better fit than MaxEnt models. The best model included minimum chlorophyll concentration, dissolved oxygen concentration, and sea surface temperature range, supporting hypothesis 3. However, of all variables included in the best model, minimum chlorophyll concentration had the highest influence on basking shark distribution. Unlike the North Atlantic distribution, the South Atlantic distribution of basking sharks includes subtropical and cool-temperate waters. This difference is explained by high minimum chlorophyll concentration off southern Brazil as compared to North Atlantic subtropical areas. Observations in other regions of the world support this conclusion. The highest habitat suitability for basking sharks is located close to nearshore areas that experience high anthropogenic impact [Current Zoology 61 （5）： 811-826, 2015].

关键词： Basking shark Chondrichthyes Geographic range MaxEnt MaxLike Southern Hemisphere

Progesterone effects on the oligodendrocyte linage: all roads lead to the progesterone receptor

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Neural Regeneration Research 2019年第12期14卷 2029-2034页

作者： Ignacio Jure Alejandro F. de Nicola Florencia Labombarda laboratorio de Bioquímica Neuroendocrina Instituto de Biología y Medicina Experimental CONICET Buenos Aires Argentina departamento de Bioquímica Humana Facultad de Medicina Universidad de Buenos Aires Buenos Aires Argentina

A new role has emerged for progesterone after discovering its potent actions away from reproduction in both the central and the peripheral nervous system. The aim of the present report is to discuss progesterone’s mechanisms of action involved in myelination, remyelination and neuroinflammation. The pivotal role of the classic progesterone receptor is described and evidence is compiled about progesterone’s direct effects on oligodendrocyte linage and its indirect effects on oligodendrocyte precursor cell differentiation by decreasing the neuroinflammatory environment.

关键词： progesterone progesterone receptor oligodendrocyte differentiation myelination remyelination neuroinflammation

Phenotypic plasticity in Drosophila cactophilic species the effect of competition, density, and breeding sites

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Insect Science 2017年第4期24卷 675-683页

作者： Juan Jose Fanara Victoria Werenkraut departamento de Ecologia Genetica y Evolucion Instituto de Ecologia GeneUca y Evolucion de Buenos Aires (CONICET-UBA) Facultad de Ciencias Exactas y Naturales Ciudad Universitaria Pabellon II Universidad de Buenos Aires Buenos Aires laboratorio Ecotono Centro Regional Universitario Bariloche Universidad Nacional del ComahuelINIBIOMA-CONICET Quintral 1250 Bariloche Rio Negro Argentina

Changes in the environmental conditions experienced by naturally occurring populations are frequently accompanied by changes in adaptive traits allowing the organ- ism to cope with environmental unpredictability. Phenotypic plasticity is a major aspect of adaptation and it has been involved in population dynamics of interacting species. In this study, phenotypic plasticity （i,e., environmental sensitivity） of morphological adap- tive traits were analyzed in the cactophilic species Drosophila buzzatii and Drosophila koepferae （Diptera： Drosophilidae） considering the effect of crowding conditions （low and high density）, type of competition （intraspecific and interspecific competition） and cacti hosts （Opuntia and Columnar cacti）. All traits （wing length, wing width, thorax length, wing loading and wing aspect） showed significant variation for each environmental factor considered in both Drosophila species. The phenotypic plasticity pattern observed for each trait was different within and between these cactopbilic Drosophila species depending on the environmental factor analyzed suggesting that body size-related traits respond almost independently to environmental heterogeneity. The effects of ecological factors analyzed in this study are discussed in order to elucidate the causal factors investigated （type of com- petition, crowding conditions and alternative host） affecting the election of the breeding site and/or the range of distribution of these cactophilic species.

关键词： adaptation body size colonization Drosophila cactophilic species wingaspect wing loading

Exclusion of tourist species from assemblages in ecological studies:a methodological approach using spiders

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Ecological Processes 2022年第1期11卷 825-844页

作者： María Florencia Nadal Alda González Gilberto Avalos Consejo Nacional de Investigaciones Científicas y Técnicas(CONICET) Buenos AiresArgentina laboratorio de Biología de los Artrópodos Facultad de Ciencias Exactas y Naturales y AgrimensuraUniversidad Nacional del NordesteAvenida Libertad 54703400 CorrientesArgentina Centro de Estudios Parasitológicos y de Vectores(CEPAVE-UNLP) Boulevard 120 s/n(e/60-64)1900 La PlataArgentina

Background:The exclusion of tourist species from samples is important to avoid bias in community ***,in practice,this is a very difficult *** commonly used methods by researchers,when the habitat of the species is not known,have several shortcomings:first,they exclude not only pseudo-rare species but also genuinely rare species;second,the results obtained with those methods depend on the abundance of the sampling;and third,they follow very subjective *** aims of this study were:(i)to propose a methodology to detect and exclude habitat-tourist species from the database used to carry out analyses in community ecology studies,(ii)to evaluate how the presence of habitat-tourist species affects the richness estimates,and(iii)to assess the effect of including juvenile spiders in the detection of tourist species and the effect of removing them from the richness ***:When the adult+juvenile dataset was considered,twenty-one habitat-tourist species were detected:8 in forest foliage,11 in forest leaf litter,and 2 in *** habitat-tourist species were considered with this dataset,richness overestimation was significant in foliage and in leaf litter,and the final slopes of the richness estimation curves were significantly steeper in leaf *** only the adult dataset was considered,eight habitat-tourist species were detected:3 in forest foliage,4 in forest leaf litter,and just one in *** inclusion of habitat-tourist species in this dataset showed an overestimation of richness,but this was not ***:The proposed methodology contributes to solving the problem of tourist species,which was recognized as one of the great problems in biodiversity *** study showed that common estimators overestimate species richness when habitat-tourist species are included,leading to erroneous ***,this research showed that the inclusion of juveniles(***)could improve the analysis outputs be

关键词： Pseudo-rare species Richness estimation Indicator value Habitat

Palaeogeographic reconstruction of Minchin palaeolake system,South America: The influence of astronomical forcing

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Geoscience Frontiers 2014年第2期5卷 249-259页

作者： Andrea Sánchez-Saldías Richard A.Faria Universidad de la República Facultad de Ciencias Departamento de Astronomía Universidad de la República Facultad de Ciencias Laboratorio de Paleobiología

Current palaeoclimatic reconstructions for the R＆#237;o de la Plata region during the latest Pleistocene （30,000 e10,000 yr BP） propose dry conditions, with rainfall at the Last Glacial Maximum amounting to one-third of today＇s precipitation. despite the consequential low primary productivity inferred, an impressive megafauna existed in the area at that time. Here we explore the influence of the flooding from a huge extinct system of water bodies in the Andean Altiplano as a likely source for wet regimes that might have increased the primary productivity and, hence, the vast number of megaherbivores. The system was reconstructed using specifically combined software resources, including Insola, Global Mapper v13, Surfer and Matlab. Changes in water volume and area covered were related to climatic change, assessed through a model of astronomical forcing that describes the changes in insolation at the top of the at-mosphere in the last 50,000 yr BP. The model was validated by comparing its results with several proxies （CH4, CO2, D, 18O） from dated cores taken from the ice covering Antarctic lakes Vostok and EPICA Dome C. It is concluded that the Altiplano Lake system drained towards the southeast in the rainy seasons and that it must have been a major source of water for the Paran＆#225;-Plata Basin, consequently enhancing primary productivity within it.

关键词： Planetary science Climate science Quaternary Palaeoecology Megafauna Parana Basin

HP0953-hypothetical virulence factor overexpresion and localization during Helicobacter pylori infection of gastric epithelium

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World Journal of Gastroenterology 2022年第29期28卷 3886-3902页

作者： Nancy K Arteaga-Resendiz Gerardo E Rodea Rosa María Ribas-Aparicio Alma L Olivares-Cervantes Juan Arturo Castelán-Vega Joséde Jesús Olivares-Trejo Sandra Mendoza-Elizalde Edgar O López-Villegas Christian Colín Pamela Aguilar-Rodea Alfonso Reyes-López Marcela Salazar García Norma Velázquez-Guadarrama laboratorio de Investigación en Enfermedades Infecciosas Hospital Infantil de México Federico GómezMexico City 06720Mexico Posgrado en Biomedicina y Biotecnología Molecular Laboratorio de Producción y Control de BiológicosEscuela Nacional de Ciencias BiológicasInstituto Politécnico NacionalMexico City 11340Mexico laboratorio de Adquisición de Hierro Universidad Autónoma de la Ciudad MéxicoPosgrado Ciencias GenómicaMexico City 03100Mexico laboratorio Central de Microscopía Escuela Nacional de Ciencias BiológicasInstituto Politécnico NacionalMexico City 11340Mexico Centro de estudios económicos y sociales en salud Hospital Infantil de México Federico GómezMexico City 06720Mexico laboratorio de Investigación en Biología del desarrollo y Teratogénesis Experimental Hospital Infantil de México Federico GómezMexico City 06720Mexico

BACKGROUND The high prevalence and persistence of Helicobacter pylori(H. pylori) infection, as well as the diversity of pathologies related to it, suggest that the virulence factors used by this microorganism are varied. Moreover, as its proteome contains 340hypothetical proteins, it is important to investigate them to completely understand the mechanisms of its virulence and survival. We have previously reported that the hypothetical protein HP0953 is overexpressed during the first hours of adhesion to inert surfaces, under stress conditions, suggesting its role in the environmental survival of this bacterium and perhaps as a virulence *** To investigate the expression and localization of HP0953 during adhesion to an inert surface and against gastric(AGS) *** Expression analysis was performed for HP0953 during H. pylori adhesion. HP0953 expression at 0,3, 12, 24, and 48 h was evaluated and compared using the Kruskal-Wallis equality-of-populations rank test. Recombinant protein was produced and used to obtain polyclonal antibodies for immunolocalization. Immunogold technique was performed on bacterial sections during adherence to inert surfaces and AGS cells, which was analyzed by transmission electron microscopy. HP0953 protein sequence was analyzed to predict the presence of a signal peptide and transmembrane helices, both provided by the ExPASy platform, and using the GLyCOPP platform for glycosylation sites. Different programs, via, I-TASSER, RaptorX, and HHalign-Kbest, were used to perform three-dimensional *** HP0953 exhibited its maximum expression at 12 h of infection in gastric epithelium *** technique revealed HP0953 localization in the cytoplasm and accumulation in some peripheral areas of the bacterial body, with greater expression when it is close to AGS *** analysis revealed the presence of a signal peptide that interacts with the transmembrane region and then allows the release of the protein

关键词： Hypothetical protein HP0953 Adherence Helicobacter pylori Glycocalyx Virulence factor Persistence

Classical olfactory conditioning promotes long-term memory and improves odor-cued flight orientation in the South American native bumblebee Bombus pauloensis

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Current Zoology 2021年第5期67卷 561-563页

作者： denise NERy Florencia PALOTTINI Walter M.FARINA laboratorio de Insectos Sociales Departamento de Biodiversidad y Biologia ExperimentalFacultad de Ciencias NaturalesUniversidad de Buenos AiresBuenos AiresArgentina Instituto de Fisiologia Biologia Molecular y Neurociencias(IFIBYNE)CONICET-Universidad de Buenos AiresBuenos AiresArgentina

When collecting a flower,bumblebees learn to associate floral features with reward,preferring,and specializing in the most profitable ones they visit(Chittka et al.1999).The proboscis extension reflex(PER)occurs naturally in the feeding context allowing individuals to access the floral *** controlled conditions,the PER paradigm is a well-established controlled learning procedure used in honeybees(Takeda 1961),and some bumblebees of the genus Bombus(Laloi et al.1999).The assessment of cognitive capacities in an operant context has been studied mainly in *** and ***(Chittka 1998;Mirwan and Kevan 2014).However,little is known about the ability to evoke associative memories in an operant context,which had been acquired in a classical *** turn,on the contrary,the Bombus genus also has the capacity to form longterm memories(Chittka 1998;McAulay et al.2015).In particular,the South American bumblebee ***(***)can learn a pure odor when it is presented in a paired association with a sugar reward within a PER paradigm(Palottini et al.2018).As other species,this one is a commercially reared pollinator that is increasingly managed in pollination services of some South American countries and they could be important for increasing production of crops(Palottini et al.2018).

关键词： crops sugar associative

X-linked Toll-like receptor 7 polymorphism associated with susceptibility to Chikungunya Fever

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Asian Pacific Journal of Tropical Medicine 2019年第3期12卷 137-141页

作者： Daniela M.Rauseo Mercedes Fernández-Mestre laboratorio de Fisiopatología Centro de Medicina ExperimentalIVIC

Objective: To investigate the association between TLR3 and TLR7 polymorphisms with susceptibility and clinical manifestations of Chikungunya ***: A total of 177 individuals were studied: 73 patients with a confirmed diagnosis for Chikungunya virus and 104 non-infected individuals. Polymorphisms were determined by Polymerase Chain Reaction-Restriction Fragment Length Polymorphism(PCR-RFLP).Results: Our analysis showed an increased CC genotype frequency of the TLR7 rs3853839 polymorphism in male patients compared to control(29% versus 2%,respectively; OR=20.69; 95% CI=2.55-167.36; Py found in CC male patients. On the contrary,65% of CG carriers were no-infected males(29% versus 65%,respectively; OR=0.23,95% CI=0.48-3.04; P=0.002). Finally,we observed a higher frequency of lymphopenia in CG male patients(CG=666.86±233.77,GG=1,314.27±752.29 cells/mm3,P=0.047). Conclusions: Our results suggest the TLR7 rs3853839 polymorphism is associated with lymphopenia and increased susceptibility to Chikungunya Fever in males.

关键词： Chikungunya Fever Toll-like-receptors Single-nucleotide polymorphisms Disease susceptibility

Male age and strain affect ejaculate quality in the Mexican fruit fly

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Insect Science 2018年第4期25卷 703-711页

作者： Mariana Herrera-Cruz Solana Abraham Nicolas NuSez-Beverido Norma Flores-Estevez Martha Reyes-Hernandez Mayvi Alvarado Diana P6rez-Staples Catedra CONACyT- Facultad de Medicina y Cirugia Universidad Autonoma 'Benito Juarez' de Oaxaca Oaxaca Mexico laboratorio de Investigaciones Ecoetologicas de Moscas de la Fruta y sus Enemigos Naturales (LIEMEN) PROIMI Tucuman Argentina CONICET Argentina INBIO TECA Universidad Veracruzana Xalapa Veracruz Mexico Instituto de Neuroetologia Universidad Veracruzana Xalapa Veracruz Mexico

Aging in all organisms is inevitable. Male age can have profound effects on mating success and female reproduction, yet relatively little is known on the effects of male age on different components of the ejaculate. Furthermore, in mass-reared insects used for the Sterile Insect Technique, there are often behavioral differences between mass-reared and wild males, while differences in the ejaculate have been less studied. The ejaculate in insects is composed mainly of sperm and accessory gland proteins. Here, we studied how male age and strain affected （i） protein quantity of testes and accessory glands, （ii） the biological activity of accessory gland products injected into females, （iii） sperm viability, and （iv） sperm quantity stored by females in wild and mass-reared Anastrepha ludens （Diptera： Tephritidae）. We found lower protein content in testes of old wild males and lower sperm viability in females mated with old wild males. Females stored more sperm when mated to young wild males than with young mass-reared males. Accessory gland injections of old or young males did not inhibit female remating. Knowledge of how male age affects different ejaculate components will aid our understanding on investment of the ejaculate and possible postcopulatory consequences on female behavior.

关键词： accessory glands age Anastrepha ludens mass-rearing sperm Tephritidae