Curso de Ciencias Biologicas

Alegrete, Brazil

Curso de Ciencias Biologicas

Alegrete, Brazil
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da Silva F.A.,Federal University of Viçosa | Nascimento E.M.,Curso de Ciencias Biologicas | Quintela F.M.,Federal University of Rio Grande do Sul
Acta Scientiarum - Biological Sciences | Year: 2012

The present study aimed to investigate the feeding habits of Lontra longicaudis in a pool system within the Private Reserve of Natural Patrimony (RPPN) Usina Maurício, located in Paraíba do Sul river basin, Atlantic Forest of southeastern Minas Gerais State. The diet composition was determined based on the identification of items present in 212 scats sampled between July 2008 and October 2009 in a 4.1 km stretch of the pool system. The found items and its respective percentages of occurrence were: mollusks (0.5%), insects (16.5%), spiders (1.4%), crustaceans (3.3%), fish (96.7%), amphibians (0.9%), snakes (3.8%), birds (2.8%), mammals (8.5%) and fruits (0.5%). Among fish, the identified families and respective percentages of occurrence were: Loricariidae (65.4%), Pimelodidae (42.9%) Cichlidae (22%), Characidae (7.3%), Erythrinidae (3.9%), Synbranchidae (2.4%), Anostomidae (2%). Therefore fish make up the most consumed item in the study area, with the predominance of benthic siluriformes (families Loricariidae and Pimelodidae).

da Silva F.A.,Curso de Ciencias Biologicas | de Assis C.L.,Associacao Regional de Protecao Ambiental ARPA Cataguases | da Silva R.A.,Agropecuaria Santana do Deserto Ltda | Antunes V.C.,AMBIOTECH Consultoria | And 2 more authors.
Neotropical Biology and Conservation | Year: 2012

This note reports data on occurrence of the echimyid Kannabateomys amblyonyx in Minas Gerais State, southeastern Brazil. Data were obtained from consult to 26 museums, bibliography search and field sampling. We found nine municipalities with species records, eight within the Atlantic Forest biome and one in the transitional area between the Atlantic Forest and Cerrado. Habitats occupied comprised bamboo groves in Montane Stational Semidecidual Forest, Submontane Stational Semidecidual Forest and bamboo patches located in middle of open area, originally covered by Submontane Stational Semidecidual Forest. Potential impacts detected were deforestation, fires, hunting and the presence of livestock and domestic dogs. © 2012 by Unisinos.

Oliveira C.W.S.,Curso de Ciencias Biologicas | Almeida G.P.,Curso de Ciencias Biologicas | de Paiva L.V.,Federal Rural University of the Semiarid Region | Franca L.F.,Federal Rural University of the Semiarid Region
Biota Neotropica | Year: 2013

The accuracy of artificial nests in representing natural patterns of nest predation has been widely studied in temperate regions and egg size is one of the most tested sources of bias. In the neotropics, experiments with artificial nests usually used larger than natural eggs, despite suggestions in literature that the eggs should be similar to those of the local species. Here, we tested the hypothesis of spatial-temporal variation in predation risk of artificial nests in relation to egg size. We used quail (Coturnix coturnix; large), Chestnut-bellied Seedfinch (Oryzoborus angolensis; small) and plasticine (both sizes) eggs placed in artificial nests. We analyzed daily nest survival using models in the Program MARK. The best-fit model included the effects of egg size and the reproductive period on daily survival of artificial nests. Nests with large eggs had greater Daily Survival Estimates (DSE) than nests with small eggs during two times and DSE were smaller early in the reproductive period. DSE of 0.82 (95% CI = 0.76 to 0.86) and 0.91 (0.87 to 0.93) were recorded for large eggs at the beginning and end periods compared to 0.72 (0.65 to 0.78) and 0.84 (0.79 to 0.88) for small eggs. Birds were more important predators (40% of records) than mammals and reptiles based on signs left on the plasticine eggs. Our results support the hypothesis that larger eggs are less depredated than small ones in artificial bird nests, even when main predators (birds) are different from those commonly observed in the Neotropics (mammals and reptiles). However, controlling the egg size in experiments with artificial nests may not be sufficient to obtain similar time patterns observed in natural nests studied in the Cerrado.

Deble L.P.,Federal University of Pampa | Da Silva Alves F.,Curso de Ciencias Biologicas
Candollea | Year: 2013

A new species, Herbertia amabilis Deble & F. S. Alves (Iridaceae), is described and illustrated from Rio Grande do Sul State, Brazil. Herbertia Sweet is a predominately South American genus, now comprising 8 species with 7 of them occurring in southern Brazil. Herbertia amabilis is closely related with Herbertia lahue subsp. amoena (Griseb.) Goldblatt, but can be distinguished principally by robust habit, narrowly linear leaves, style arms recurved at the apex, and smaller obovate-clavate ovary. With just two known populations occurring in central Rio Grande do Sul State, with an extent of occurrence comprised in less than 100 km2 and the populations size being smaller than 10 km2 the new species is preliminary considered as critically endangered. The geographic distribution of the new species is presented as well as the key for the Brazilian species of Herbertia. © CONSERVATOIRE ET JARDIN BOTANIQUES DE GENÈVE 2013.

de Ressel K.A.,Federal University of Goais | de Lima-Ribeiro M.S.,Laboratorio Of Macroecologia | dos Reis E.F.,Curso de Ciencias Biologicas
Ciencia Rural | Year: 2015

Cajuzinho-do-cerrado (Anacardium humile A. STHIL.) has a wide distribution in areas of the Midwest Brazilian Cerrado, it’s fleshy fruits are widely used by regional populations in an extractive way. Despite the promising agro-economic potential, few studies have been developed to domestication of the species. The study aimed to evaluate twenty different matrices of cajuzinhodo- cerrado, checking how the weight and the storage of cashew nuts are related with the emergence percentage and biometric variables of seedling newly formed. Fifty fruits were collected from twenty different matrices of Anacardium humile inside the Emas National Park, Mineiros, GO. All fruits collected showed matured, developed and yellow pedicels. Seven matrices had an excess number of fruits, so it was harvested 50 other cashew nuts, which were stored in cold and dry chamber for a period of six months. The seedlings emergence rates were satisfactory in both, total experiment and for progeny. Reproduction of Anacardium humile through cashew nuts proved to be promising. Weight of cashew nuts did not affect emergence rates or seedlings biometrics. The storage of nuts for six months for planting in autumn was inefficient. © 2014, Universidade Federal de Santa Maria. All rights reserved.

da Silva F.A.,Curso de Ciencias Biologicas | de Assis C.L.,Curso de Ciencias Biologicas | Quintela F.M.,Federal University of Rio Grande do Sul
Herpetology Notes | Year: 2010

We report the first case of albinism in Liophis miliaris (Serpentes: Dipsadidae). A total albino specimen was found exhibiting nocturnal activity in an Atlantic Forest fragment in Minas Gerais State, southeastern Brazil. After being collected, the specimen was placed in the herpetological collection of the Federal University of Viçosa, state of Minas Gerais, Brazil.

Ribeiro S.,Federal University of Pará | Santos-Jr A.P.,Federal University of Pará | Chagas L.C.,Federal University of Pará | Chalkidis H.M.,Curso de Ciencias Biologicas
Check List | Year: 2014

We present here a new record for Amphisbaena michelli for the western of Pará State, northern Brazil. The specimen was found in the municipality of Belterra, on the right bank of the Tapajós River, and represents an expansion ca. 350 km west of the previously known geographic distribution of the species. © 2014 Check List and Authors.

Uchoa M.A.,Federal University of Grande Dourados | Bergamo Missirian G.L.,Curso de Ciencias Biologicas
Florida Entomologist | Year: 2014

Antlions (Neuroptera: Myrmeleontidae) are predators commonly found in the tropical regions. There are few studies on their biology and natural enemies in the Neotropics. The aim of this study was to sample larvae of Myrmeleon brasiliensis (Navás 1914) in natural environments in order to identify their parasitoids and estimate levels of parasitism. Larvae of M. brasiliensis, from first to third instars, were collected in a natural forest in Aquidauana, Mato Grosso do Sul state, Brazil from Feb 2001 to Jan 2002. In total, 161 larvae of M. brasiliensis were collected and reared in the laboratory. They were fed daily with leaf-cutting antworkers and third instar larvae of fruit flies. Two parasitoid species emerged from larvae of M. brasiliensis: Hockeria eriensis (Wallace 1942) (Hymenoptera: Chalcididae) and Paravilla sp. near stheno (Wiedemann 1828) (Diptera: Bombyliidae, Anthracina). This is the first record of M. brasiliensis's parasitoids in Brazil. All juveniles of the antlion were killed by the parasitoids after pupation, and only an adult of both parasitoid species have emerged per pupa of M. brasiliensis.

Miranda R.D.S.,Federal University of Ceará | Suderio F.B.,Curso de Ciencias Biologicas | Sousa A.F.,Curso de Ciencias Biologicas | Filho E.G.,Federal University of Ceará
Revista Ciencia Agronomica | Year: 2010

The Cowpea [Vigna unguiculata (L.) Walp] cv. Pitiúba is an important crop in the economic and social contexts in the Northeast of Brazil, especially in the state of Ceará, which is considered the largest producer of this region. With the purpose of characterizing the symptoms of nutritional deficiencies in Cowpea seedlings, the seeds were sowed in washed sand and, after a period of five days, the seedlings were transferred for a complete nutrient solution for the period of acclimatization. After three days, the seedlings were submitted to the different treatments. The experiment had the following treatments: complete nutrient solution (N; P; K; Ca; Mg; S and micronutrients) and individual omission of each element -N; -P; -K; -Ca; -Mg; -S; -B, -Fe and -aeration. The symptoms of the deficiencies were observed, characterized and registered by pictures. In the end of the experiment, the length measures and the fresh and dry matters of the root and shoot of the seedlings were analyzed. All macro and micronutrients caused deficiency symptoms and they affected the development of the seedlings. The symptoms were developed firstly in seedlings with failure in Fe, Ca and N. The total dry matter was reduced in all the treatments with absence of nutrients, but the absence of Ca, N and Fe were responsible for the larger reduction of biomass. The decreasing order of reduction was: Ca > N > Fe > P > K > Mg > S > Aeration > B > Complete.

Herbertia zebrina, a new species from Serra do Sudeste, Rio Grande do Sul State (Brazil) is described and illustrated, and its taxonomic affinities are discussed. Comments about geographic distribution, conservation and a key to the Brazilian species of Herbertia are also provided.

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