Showing papers in "Mastozoología neotropical in 2004"

Lista dos mamíferos do estado de Santa Catarina, sul do Brasil

Abstract: List of mammals from Santa Catarina State, southern Brazil. The mammal fauna from Santa Catarina State, southern Brazil, is one of the least known of the country. Works on terrestrial mammals are scarce and new species of aquatic mammals have been registered in the last years. For that reason, a commented list of the mammals of Santa Catarina based on data gathered from scientific collections and bibliographical references are presented. One hundred and fifty-two species of confirmed occurrence, 59 species of possible occurrence and six species/subspecies with erroneous record for the state were registered.

Micromamíferos (didelphimorphia y rodentia) del sudoeste de la provincia de buenos aires (argentina): taxonomía y distribución

Abstract: Small mammals (Didelphimorphia and Rodentia) from southwestern Buenos Aires province, Argentina: Taxonomy and distribution. Species of small mammals from southwestern Buenos Aires province range within a wide variety of habitats, herbaceous (Pampean District), shrubs (Monte District), steppes, and xerophytic woodlands (Espinal District). Their natural history is still poorly known. In this paper we make a synthesis of the taxonomy and distribution of the marsupials (Marmosinae) and rodents (Sigmodontinae) of southwestern Buenos Aires province. Distributional records and taxonomical information were obtained from field survey, analyses of raptor pellets, revision of specimens housed in collections in Argentina, and literature. Between Sierra de la Ventana (38o S) and the rio Negro (41oS) occur two species of marmosines and 14 of sigmodontine rodents. Some of these species show a restricted distribution (e.g., Phyllotis xanthopygus, endemic for Sierra de la Ventana), and others are widespread (e.g. Akodon azarae or Calomys musculinus) across different phytogeographic units. A cluster analysis at local scale shows an ordination of small mammal assemblages with the topology (Sierra de la Ventana + Southern Atlantic Coast) (Espinal + Monte). The zoogeographic unicity of the Monte in the study area is evidenced by two sigmodontines, Akodon iniscatus and Oligoryzomys longicaudatus. The micromammal assemblage of Sierra de la Ventana may be characterized as pampasic. The wide distribution of A. azarae and C. musculinus may reflect the anthropic activities devel- oped during the last century. These activities on shrub steppe have certainly diluted the original zoogeographic boundaries and allowed the dispersion of opportunistic sigmodontine species.

La distribución de Chrysocyon brachyurus (Illiger, 1811) (mammalia: carnívora: canidae) durante el holoceno en la Argentina: implicancias paleoambientales

Abstract: On the basis of the current distribution of C. brachyurus and the climatic factors (temperature and precipitation) of the area, the paleontological and arch...

Características Químicas de salados y hábitos alimenticios de la Danta de montaña (Tapirus pinchaque Roulin, 1829) en los Andes Centrales de Colombia

Abstract: Chemical characteristics of salt licks and feeding habits of mountain tapir (Tapirus pinchaque) in the central Andes of Colombia. The chemical composition of salt licks and the diet of the mountain tapir (Tapirus pinchaque) were studied in the upper montane rain forests (2900-3700 m), in the Parque Regional Natural Ucumari and Parque Nacional Natural Los Nevados, Colombia. We collected water samples from the salt licks, 28 feces and voucher specimens of plants with tapir browsing sign. The chemical analysis of the water from salt licks showed higher concentrations of Na, N-NH4 y N-NO3 when compared to the water of a nearby stream used as control. The nitrogen of the water at the salt lick is probably being fixed by Nostoc, a Cynobacteria associated with Gunnera manicata and G. magnifolia, two plants located in the upper part of the rocky cliff from where the water drains to the salt lick. It is likely that the tapirs are drinking these waters to complement their diet, especially in an environment like tropical montane forests where nitrogen is in low concentration. A total of 35 plant species showed browsing signs. The plant families that the tapir consumed the most were ferns (seven species), Melastomataceae (six species) and Rubiaceae (five species). In the feces there were mostly leaves and twigs and no fruits or seeds. Germination experiments should be carried out to determine if the mountain tapir is a seed dispersal as suggested in Ecuador.

Distribution of Pseudoryzomys simplex (Rodentia: Cricetidae) in Argentina

Abstract: We report new records for the poorly known sigmodontine rodent Pseudoryzomys simplex in Argentina, totalizing 28 recording localities (Formosa, Chaco, and Santa Fe prov- inces). The southern limit of the species is about 30oS and its distribution, in Argentina, is mainly restricted to the Eastern Chaco biome. RESUMEN. Distribucion de Pseudoryzomys simplex (Rodentia: Sigmodontinae) en la Argentina. Se presentan nuevos registros para el roedor sigmodontino Pseudoryzomys simplex en Argentina, totalizando 28 localidades conocidas (provincias de Formosa, Chaco y Santa Fe). El limite sur de la especie se encontraria hacia los 30oS y su distribucion, en Argentina, se restringe principalmente al Chaco oriental.

Sigmodontinos (Mammalia, Rodentia) del Holoceno tardío del nordeste de la provincia de Buenos Aires (Argentina)

Abstract: Late Holocene sigmodontines (Mammalia, Rodentia) from northeastern Buenos Aires province (Argentina) Remains of fossil muroid rodents found in La Bellaca 2 (34° 22' 79" S - 58° 39' 53" O) and Las Vizcacheras (34° 16' 81" S - 58° 48' 65" O) archeological sites were studied These samples are Late Holocene in age (1-0,6 ka), ac- cording to several radiocarbon dates The assemblages are largely dominated by the am- phibious orizomyne Holochilus brasiliensis with low frequencies of the akodontines Bibimys cf B torresi, Necromys sp, Oxymycterus rufus and Scapteromys cf S aquaticus-S tumidus Samples of fossil muroids from the late Holocene in northeastern Buenos Aires wetlands are extremely isolated and chronologically limited The scarce species registered in the archeo- logical sites suggest climatic conditions similar to the present ones in the area The sigmodontine fauna from la Bellaca II and Las Vizcacheras indicates an environment domi- nated by marshes, small fresh-water bodies, flooded grasslands and grass steppes Palabras clave: Region Pampeana, humedales, Sigmodontinae, paleoambientes, tafonomia

Holochilus chacarius chacarius (rodentia, cricetidae) en la provincia de buenos aires, argentina

Abstract: Fil: Voglino, Damian. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo; Argentina

Nuevos registros de Glironia venusta y Didelphis albiventris (Didelphimorphia) para Perú

Abstract: New records of Glironia venusta and Didelphis albiventris (Didelphimorphia) from Peru. We report a new record of Glironia venusta from Peru. The new localit...

A preliminary revision of knowledge status of felids in argentina

Abstract: Argentina is the host of 10 wild felids (28% of the world total). Although the Cat Specialist Group Action Plan has classified the conservation status of Argentine cats as relatively good, the ranking was based on a largely incomplete database for at least 80% of the species. Here we review the current status of knowledge and research effort of Argentine cats, compare it with their distribution, habitat association and conservation status and pro- vide guidelines for their future research. Between 1990 and 2000, cat research has received increasing attention in Argentina. Twenty-four projects have been carried out, but only 13 studies are still in progress. A rank of research priority has been calculated for each felid and ecoregion. Our analysis showed that the Andean and Brazilian Araucaria tropical forests and Patagonia steppe are the three ecoregions with the highest priority for future cat research. The kodkod (Oncifelis guigna), Andean mountain cat (Oreailurus jacobita) and oncilla (Leopardus tigrina) had the highest score. This ranking method is the first systematic attempt to identify research priorities based on the comparison between study effort and conservation priority of both the species in object and their habitats.

Nuevos registros de Sphaeronycteris toxophyllum para la cuenca amazónica de Perú

Abstract: Sphaeronycteris toxophyllum Peters 1882 esuna especie relativamente rara de quiroptero alo largo de su rango geografico, debido alescaso numero de colectas y ejemplares cono-cidos (Emmons y Feer, 1990). Este generomonotipico de filostomido fue descrito porPeters (1882), quien obtuvo el ejemplar de uncomerciante sin una localidad especifica(Thomas, 1898; Husson, 1958). Hershkovitz(1949) cito “South America” como localidadtipo, sin ofrecer mayores comentarios. Husson(1958) sobre la base de ejemplares citados porThomas (1898), establecio como localidad tipoa “neighbourhood of Merida, S.W. Venezuela,alt. 1600 to 3000 m”. A pesar de eso, autoresposteriores siguieron a Cabrera (1958) quien,omitiendo a Thomas (1898), la restringio aPebas, Loreto, Peru, por considerar, erronea-mente, a esta como la primera localidad con-creta donde se cito a S. toxophyllum. Esta ul-tima localidad fue citada por Rehn en 1901,por lo tanto es posterior a la publicacion deThomas (1898). Como consecuencia, la loca-lidad indicada por Husson (1958), fue efecti-vamente publicada con anterioridad a la quefundamento la determinacion de Cabrera.Esta es una especie exclusiva de Sudamerica,restringida a la Amazonia de Venezuela, Co-lombia, Brasil, Peru y Bolivia (Sanborn, 1941;Handley, 1976; Koopman, 1982, 1993;Emmons y Feer, 1990; Anderson, 1997;Nowak, 1999; Alberico et al., 2000), donde seencuentra en varios tipos de habitat, tales comobosques secundarios, pastizales y areas abier-tas cercanas a cuerpos de agua (Handley, 1976;Emmons y Feer, 1990; Nowak, 1999). Su bio-logia y ecologia alimentaria no son conocidas(Gardner, 1977; Nowak, 1999).Si bien en algunos paises como Venezuelaposee una amplia distribucion (Handley, 1976;Fernandez B., 1982), en Peru solo se conociade Pebas (Departamento Loreto, 3o 20' S; 71o49' O) ubicada en el noreste (Rehn, 1901) y alsudeste en la Estacion Biologica Cocha Cashu,Reserva de Biosfera Manu (DepartamentoMadre de Dios, 11° 52' S, 71° 22' O) (Pachecoet al., 1993) y en tres localidades de la regiondel bajo Urubamba (Departamento Cusco,Cashiriari-3, 11° 53' S, 72° 39' O; Konkariari,11° 48' S, 72° 52' O; Segakiato, 11° 48' S, 72°53' O) (Solari et al., 1998).El ejemplar de Pebas habria sido colectadoa fines del siglo XIX y desde entonces la es-pecie no se habia registrado nuevamente en elarea, hasta que en 2003 fue colectado un espe-cimen en el rio Orosa y recientemente otro en

La Jayupa de la altura (Cuniculus taczanowskii, Rodentia, Cuniculidae), un nuevo registro de mamífero para la fauna de Bolivia

Abstract: In October 2002 we collected a specimen of the mountain paca (Cuniculus taczanowskii). This collection represents the first record of this species for Bolivi...

El registro de Ctenomys talarum durante el Pleistoceno tardío-Holoceno de las sierras de Tandilia oriental

Abstract: The identity of 1,004 cranial and mandibular remains of Ctenomys from the stratigraphic sequence of the archaeological site Cueva Tixi, is discussed. Accordi...

Nuevos registros de insectos (Diptera y Siphonaptera), ectoparásitos de murciélagos (Vespertilionidae) del norte de Uruguay

Abstract: Resumen es: Se dan nuevos registros de insectos ectoparasitos (Diptera: Nycteribiidae: Basiliaandersoni Peterson & Maa y B. plaumanni Scott y Siphonaptera: Ischnopsy...

Aportes al conocimiento de Notiomys Edwardsii (THOMAS, 1890) en el noroeste del Chubut, Argentina

Abstract: A new locality and the analysis of stomach contents for the poorly known rodent Notiomys edwardsii (Thomas) is presented. The specimen was captured in a pitf...

Nuevos datos sobre la distribución de irenomys tarsalis (philippi, 1900) (rodentia: sigmodontinae) en argentina

Abstract: Resumen es: Se brinda una sintesis de las localidades conocidas en Argentina para el roedor sigmodontino Irenomys tarsalis, adicionando los registros mas extremos ha...

Inmunoglobulinas G de cadenas pesadas en la leche de los camélidos sudamericanos

Abstract: Heavy-chain IgG in the milk of South American camelids. Camelids have two kinds of IgG. One is the conventional IgG, similar to that of the rest of mammals. The other is a special type of IgG lacking light chains (IgG H ), which includes only two heavy chains, its molecular weight reaching 96 KDa approximately. Heavy-chain IgG was found in the blood of two Old World camelids species, and in South-American llamas. The aim of this work was to investigate which types of IgG are present in the milk of the four species of South American camelids. In order to achieve this investigation, milk samples of llama, vicuna, alpaca, and guanaco were studied through PAGE-SDS, immunoblotting and immunodotting assays. Results showed that all South American camelids have both immu- noglobulins: the conventional IgG, and the heavy-chain IgG, the latter being present in a glycosylated form.

Análisis citogenético de Panthera onca (Felidae: Pantherinae) de la provincia de Misiones, Argentina

Abstract: Cytogentic analysis of Panthera onca (Felidae: Pantherinae) from Misiones province, Argentina. The objective of the present work was to establish the chromosomal number and the patterns of G and NOR of captive jaguar specimens from Misiones province. Cytogenetic analysis showed that diploid chromosome number of these specimens was 38, distributed in 6 autosomal groups (A, B, C, D, and, F) and the sex pair, showing a great similarity with the other species of this group previously analyzed in this family, when pat- terns of G bands as well as the location of the NOR where compared. Palabras clave: bandas NOR, bandas G, yaguarete, jaguar.

Adaptaciones morfológicas de la lengua de Desmodus rotundus rotundus (Chiroptera: Phyllostomidae) en función de la alimentación

Abstract: Morphological adaptations of the tongue of Desmodus rotundus (Chiroptera: Phyllostomidae) related with their feeding habits. An analysis of the external mo...

Marsupials from Argentina: Comments on Ojeda and Monjeau (1995)

Abstract: Miguel C. Pinto and Alfred L. Gardner 1 Escuela de Biologia, Pontificia Universidad Catolica del Ecuador, Avenida 12 de Octubre y Roca, Quito, Ecuador, and Research Training Program, National Museum of Natural History, Smithsonian Institution, Washington, D.C. 20560, ; 2 USGS Patuxent Wildlife Research Center, National Museum of Natural History, Smithsonian Institution, P.O. Box 37012, Washington, DC, USA, 200137012.