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Itens para a visualização no momento 21-30 of 64
O papel das florestas preservadas contra os efeitos dos agrotóxicos e da radiação solar ultravioleta em girinos e o potencial de pequenas propriedades rurais na redução de impactos
(Universidade Federal de Santa Maria, 2020-03-02)
Amphibians are the most threatened group of vertebrates on the planet, declines have already been
observed in natural populations in various regions of the globe. Several hypotheses have been
proposed to elucidate this, ...
Estratégias reprodutivas em serpentes da Tribo Tachymenini (Dipsadidae: Xenodontinae) na região subtropical do Brasil
(Universidade Federal de Santa Maria, 2019-11-25)
Thamnodynastes strigatus and Tomodon dorsatus are snake’s species of the monophyletic tribe Tachymenini widely distributed in the subtropical Brazil. Thamnodynastes strigatus is mostly arboreal with a nocturnal activity ...
Padrões de distribuição do gênero Aegla Leach, 1820 (Crustacea, Decapoda, Anomura) associados à cobertura do solo
(Universidade Federal de Santa Maria, 2015-03-16)
Knowing the distributional patterns and the mechanisms that lead to the actual levels of diversity and richness is a challenge given the ecosystems threats. Understanding how the threats coming from the human actions can ...
Revisão de espécies neotropicais relacionadas ao gênero Alona (Crustacea, Chydoridae), com ocorrência no Brasil
(Universidade Federal de Santa Maria, 2016-02-26)
Alona genus was, for a long time, considered the main group of species within the family Chydoridae, presenting high diversity when compared to other genera. The reason behind this statement emerges from the polyphyletic ...
Filogeografia de anfíbios anuros dos campos subtropicais do sudeste da América do Sul
(Universidade Federal de Santa Maria, 2019-08-30)
The climatic and geological events of the Neogene period and the climatic fluctuations of the
Quaternary have been pointed out as the main responsible for the diversification of the biota in open
areas of South Am erica. ...
Peixes como modelo biológico para o monitoramento ambiental em áreas agrícolas
(Universidade Federal de Santa Maria, 2021-08-31)
The high demand for food has led to a greater number of pesticides used in crops, causing an environmental impact on aquatic environments near these locations. To assess the impacts on aquatic environments, biomonitoring ...
Metatheria versus eutheria: uma comparação trófica e morfológica
(Universidade Federal de Santa Maria, 2020-02-18)
The clade Theria has slept around 170 Mya into the two most diverse taxonomic groups of mammals: Metatheria
e Eutheria. Since them, and especially during the Cenozoic, metatherians and eutherians followed towards ...
Conservação de crustáceos límnicos: efeito da temperatura e pesticidas no metabolismo oxidativo de Aegla longirostri, in situ e ex-situ
(Universidade Federal de Santa Maria, 2021-08-31)
Freshwater ecosystems, especially low-order streams, are constantly threatened by the advance of agricultural activities that end up contaminating these places with pesticides and degrading the surrounding vegetation, which ...
Ecologia comportamental de Crossodactylus schmidti Gallardo, 1961 (Anura, Hylodidae): atividade reprodutiva, comunicação acústica, visual e multimodal
(Universidade Federal de Santa Maria, 2015-02-26)
The communication process has a fundamental role in the life history of organisms, as it assumes a coevolutionary interaction between sender and receiver. The acoustic communication has a key role in the life history of ...
Comunidade de formigas (Hymenoptera: Formicidae) de áreas urbanas da região oeste de Santa Catarina, Brasil
(Universidade Federal de Santa Maria, 2014-02-27)
Urbanization process is a major threat to biodiversity, and among organisms found in urban areas, ants represent an important but understudied group compared to other insects. Knowing the richness and composition of the ...