GAYANA最新文献

{"title":"Discovering new floral visitors of four Chilean endemic orchids","authors":"V. Monzón, R. Araújo, Patricio Avendaño, Rubén Garrido, J. N. Mesquita‐Neto","doi":"10.4067/s0717-65382019000200141","DOIUrl":"https://doi.org/10.4067/s0717-65382019000200141","url":null,"abstract":"Orchidaceae is a diverse group with conservation issues all over the World. Due to its endangered situation, knowledge about its reproductive biology is needed to plan conservation strategies. We conducted a study during October 2016 and October 2017 in Maule region, Chile, and discovered the following unreported interactions: Colletes seminitidus Spinola and Astylus trifasciatus Guér. transferring pollen from Bipinnula fimbriata; Centris nigerrima (Spinola) transferring pollen from Chloraea bletioides; Cadeguala occidentalis (Haliday) flower-visiting Chloraea gavilu; Centris cineraria Smith and Megachile saulcyi Guérin-Méneville transferring pollen from Gavilea venosa.","PeriodicalId":55128,"journal":{"name":"GAYANA","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49038931","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Relación entre la conducta térmica y el sexo de una población de Pleurodema thaul (Amphibia: Leiuperidae) provenientes de la comuna de Antuco, región del Biobío","authors":"Nicza Alveal, R. Salinas, Helen Díaz Páez","doi":"10.4067/S0717-65382019000200093","DOIUrl":"https://doi.org/10.4067/S0717-65382019000200093","url":null,"abstract":"Alveal Riquelme, Nicza Fernanda, supervisor de grado \u0000Diaz Paez, Helen, supervisor de grado","PeriodicalId":55128,"journal":{"name":"GAYANA","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2019-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46083534","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Consumption of aquatic macrophytes by the Red-gartered Coot Fulica armillata (Aves: Rallidae) in a coastal wetland of north central Chile","authors":"Carlos Velásquez, E. Jaramillo, P. Camus, C. San Martín","doi":"10.4067/s0717-65382019000100068","DOIUrl":"https://doi.org/10.4067/s0717-65382019000100068","url":null,"abstract":"The Red-gartered Coot Fulica armillata, is a common herbivorous water bird in coastal wetlands of the southern Neotropical region. Microhistological analyses of feces collected at the coastal wetland of Punta Teatinos (north central Chile; ~29oS), show that this coot feeds predominantly on Stuckenia pectinata, the most abundant submerged macrophyte at this area. The foraging behavior of F. armillata is discussed in regard with its ecological role as a primary consumer on coastal wetlands.","PeriodicalId":55128,"journal":{"name":"GAYANA","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"70346921","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Marine biodiversity in Venezuela: Status and perspectives","authors":"P. Miloslavich, Eduardo Klein, E. Yerena, Alberto Martín","doi":"10.4067/S0717-65382003000200012","DOIUrl":"https://doi.org/10.4067/S0717-65382003000200012","url":null,"abstract":"Venezuela se encuentra entre los primeros 10 paises con la mayor biodiversidad en el mundo, tanto en el ambiente terrestre como en el marino. Dada su posicion biogeografica, la flora y fauna marina venezolana esta compuesta por especies de biorregiones muy distintas como lo son el Caribe y el Delta del Orinoco. En el Caribe, los ecosistemas han recibido una atencion considerable, sin embargo, debido al tremendo impacto de actividades humanas tales como el turismo, sobreexplotacion de recursos marinos, alteracion fisica, la industria petrolera y contaminacion, entre otras, estos ambientes se encuentran bajo un gran riesgo y su biodiversidad esta altamente amenazada. Los ecosistemas mas representativos de esta region incluyen las playas arenosas, litorales rocosos, praderas de fanerogamas marinas, arrecifes coralinos, comunidades de fondos blandos y bosques de manglar. El Delta del Orinoco esta constituido por un grupo muy complejo de ecosistemas marinos, estuarinos y dulceacuicolas, los habitats son muy diversos pero hay muy poca informacion disponible acerca de este sistema. En este trabajo resumimos lo conocido, lo cual es toda la informacion disponible en Venezuela acerca de la investigacion cientifica en biodiversidad, los diferentes ecosistemas y el grado de conocimiento que ha sido generado a traves de diversos tipos de publicaciones, las colecciones biologicas, la importancia y el alcance de las areas protegidas como reservas de biodiversidad y el marco legal institucional dirigido hacia su proteccion y uso sustentable. Igualmente, para lo desconocido, proponemos como prioridad de investigacion la estimacion de area, el listado completo de las especies y el estado de salud de los principales ecosistemas a una escala a nivel nacional. Esta nueva informacion debe ser integrada y resumida en bases de datos de sistemas de informacion geografica, accesible a la comunidad cientifica asi como a las agencias encargadas de los planes de manejo. A largo plazo, un inventario genetico deberia incluirse como una necesidad para establecer un mejor conocimiento de los recursos biologicos. Proponemos posibles proyectos a futuro en una escala local (Venezuela), regional (Caribe Sur: Colombia, Venezuela y las Antillas) y global (America del Sur).","PeriodicalId":55128,"journal":{"name":"GAYANA","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/S0717-65382003000200012","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45721205","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Cepa antártica de Bacillus sp., con actividad extracelular de tipo agarolítica y alginatoliasa","authors":"Paris Lavin, Jorge Gallardo-Cerda, C. Torres-Díaz, G. Asencio, Marcelo González","doi":"10.4067/S0717-65382013000200001","DOIUrl":"https://doi.org/10.4067/S0717-65382013000200001","url":null,"abstract":"Diversas bacterias asociadas a macroalgas pueden usar ficocoloides como fuente de carbono. Las bacterias de la Antartica, poseen caracteristicas fisiologicas adaptativas que habrian evolucionado para permitir su supervivencia y funcionamiento dentro de las condiciones adversas de ese ecosistema. Por lo tanto, bacterias aisladas desde algas antarticas podrian tener la capacidad de degradar enzimaticamente azucares complejos a temperaturas inferiores que aquellas aisladas desde zonas mas calidas, lo que potencialmente podria tener aplicaciones en la mejora en procesos industriales que utilizan enzimas. El analisis del gen ribosomal 16S indica que la cepa bacteriana aislada desde algas varadas en la Isla Rey Jorge (Antartica), pertenece al genero Bacillus. El sobrenadante libre de celulas presento actividad agarasa y alginatoliasa. Se encontraron diferencias significativas en la temperatura optima para hidrolizar agarosa y alginato, evaluada dentro de un rango de 4 a 30 °C. La actividad agarolitica fue mayor a 4 °C, mientras que la actividad alginatoliasa fue mayor a 30 °C. Estos resultados poseen un alto valor biotecnologico y podria ser utilizada con fines industriales.","PeriodicalId":55128,"journal":{"name":"GAYANA","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/S0717-65382013000200001","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47350882","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Overview and challenges of Marine Biodiversity Research in Peru","authors":"J. Tarazona, D. Gutiérrez, C. Paredes, A. Indacochea","doi":"10.4067/S0717-65382003000200009","DOIUrl":"https://doi.org/10.4067/S0717-65382003000200009","url":null,"abstract":"El presente trabajo es una revision panoramica, aunque incompleta, de la biodiversidad biologica marina del Peru, que incluye el ecosistema de surgencias costeras peruano, las areas marinas someras de la costa peruana y el ecosistema de manglar del norte del Peru. Incluye un analisis de los avances en conservacion y manejo, y de los recursos con que se dispone para la investigacion. El analisis mostro principalmente la escasez de recursos humanos y las limitadas facilidades de laboratorios y de estaciones costeras de investigacion de que disponen las instituciones. Tambien se hizo un analisis de los vacios de informacion a nivel taxonomico y de estudios ecosistemicos, que reflejo una escasez de estudios en la mayoria de grupos taxonomicos y comunidades biologicas. Finalmente, las consultas y discusiones promovidas en el seno de la comunidad cientifica, permitieron identificar como principales retos para las investigaciones futuras a: la formacion y capacitacion de recursos humanos, el desarrollo de inventarios taxonomicos, el estudio de endemismos y areas de especiacion, la aplicacion de nuevas tecnologias en el monitoreo biotico y abiotico del ecosistema y la evaluacion de los impactos del cambio global sobre la biodiversidad marina.","PeriodicalId":55128,"journal":{"name":"GAYANA","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/S0717-65382003000200009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48301730","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"CHROMOSOMES OF THE LIMPET FISSURELLA LIMBATA (SOWERBY, 1835) FROM NORTHERN CHILE (ARCHAEOGASTROPODA: FISSURELLIDAE)","authors":"José Pinochet-Roco, Irma Northland-Leppe, Juana Capetillo-Arcos, Pedro Jara-Seguel","doi":"10.4067/S0717-65382008000200015","DOIUrl":"https://doi.org/10.4067/S0717-65382008000200015","url":null,"abstract":"Fissurella limbata (Sowerby, 1835), presenta un numero cromosomico diploide 2n = 32 similar al descrito previamente para otras especies del genero Fissurella Reeve 1849. El juego cromosomico haploide deF limbata tiene siete cromosomas metacentricos, seis submetacentricos y tres subtelocentricos. Los cromosomas son pequenos y no exceden de 4,0 mm en longitud.","PeriodicalId":55128,"journal":{"name":"GAYANA","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45952735","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Las grandes bacterias del Sulfureto de Humboldt","authors":"V. Gallardo, Carol Espinoza, Alexis Fonseca, Selim S. Musleh","doi":"10.4067/S0717-65382013000200008","DOIUrl":"https://doi.org/10.4067/S0717-65382013000200008","url":null,"abstract":"Durante el primer estudio nacional de la zona de minimo oxigeno (ZMO) y del macrobentos animal costa afuera del norte de Chile (1962), se descubrio una comunidad bentonica compuesta de bacterias filamentosas multicelulares gigantes en los sedimentos fuertemente reducidos entre 50 y182 m. La masiva abundancia de filamentos bacterianos visibles a simple vista y el extremadamente escaso macrobentos animal, fueron rasgos inesperados. Mas recientemente (2004) un nuevo ensamble de bacterias filamentosas multicelulares mas pequenas fue descubierto distribuido en los sedimentos mas reducidos sub-superficiales del tapiz bacteriano. Hoy reconocemos que este ecosistema dominado por procariotas constituye un rasgo mayor y distinto al nivel mundial el que aqui denominamos \"Sulfureto de Humboldt\" (SH) por su distribucion entre Peru central y Chile central. Durante un largo periodo de una intensa investigacion que surge despues de 1977, con fuerte contribucion internacional, se ha acumulado un gran cuerpo de informacion sobre el primer ensamble y su ambiente, fundamental para la comprension del funcionamiento del Gran Ecosistema Marino de Humboldt, en tanto que la investigacion sobre el segundo ensamble recien comienza. El presente trabajo es un esfuerzo para reunir la mayor parte de la literatura pertinente con la intencion de estimular a los cientificos locales a enfrentar el necesario y urgente gran esfuerzo de investigacion en las diversas lineas que la biota y el ambiente del Sulfureto de Humboldt ofrecen.","PeriodicalId":55128,"journal":{"name":"GAYANA","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2019-04-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/S0717-65382013000200008","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46545447","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Age of Jack mackerel Trachrus murphyi (Carangidae) using daily growth rings in sagittae otoliths","authors":"Lilian Cisterna, H. Arancibia","doi":"10.4067/S0717-65382017000100028","DOIUrl":"https://doi.org/10.4067/S0717-65382017000100028","url":null,"abstract":"Growth of Jack mackerel (Trachurus murphyi) was estimated using daily growth rings in fi sh collected in central-south Chile from 2004 to 2011. The von Bertalanffy growth curve at length for both sexes (n=210 individuals) is FLt = 75*[1-e -0.16(t+0.13)] where FLt is fork length (cm) at time t (years).","PeriodicalId":55128,"journal":{"name":"GAYANA","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43294488","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

{"title":"Feeding habits and people’s perception of the Barn Owl ( Tyto alba tuidara , J.E.Gray 1829) in urban settings of Southern Chile: Implications for conservation","authors":"Javier Godoy-Güinao, I. Díaz, Manuel Llanos-Pineda, Dominique Alò","doi":"10.4067/S0717-65382017000100009","DOIUrl":"https://doi.org/10.4067/S0717-65382017000100009","url":null,"abstract":"People’s perception on birds of prey is heavily infl uenced by its intrinsic value, utility, myths and superstitions. In particular, negative perceptions may encourage poaching and persecution of these birds, affecting their conservation status. One nocturnal raptor species widely distributed across the world is the Barn Owl (Tyto alba, Tytonidae). In Chile, this species has been recorded and studied exclusively in rural and sub-urban areas. However, in the city of Valdivia Barn owls exist within the city boundaries. In this study we documented the feeding habits of Barn owls nesting in urban settings of Valdivia, and we analyze the opinions of local neighbors toward the owls. To characterize the diet of owls, we collected all pellets found around their nesting tree on a monthly basis between August 2010 and August 2011. We interviewed the neighbors using a questionnaire that included questions about the utility, ethical or aesthetic value of the owl and the tree where they nested. Our results indicate that the main prey of the Barn Owl was the Long-tailed Colilargo (Oligoryzomys longicaudatus). The neighbors’ perception was favorable to the Barn Owl primarily for aesthetic and ethical reasons, and not utilitarian reasons. Our results suggest that people perception in urban areas is different than in rural areas, where previous studies showed the prevalence of utilitarian values. This positive perception represents a great potential to promote conservation and environmental education in the city, creating a link between people and the natural elements they have in their environment.","PeriodicalId":55128,"journal":{"name":"GAYANA","volume":null,"pages":null},"PeriodicalIF":0.1,"publicationDate":"2017-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.4067/S0717-65382017000100009","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48649918","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"生物学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}