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Itens para a visualização no momento 11-20 of 24
Evolução molecular e padrões macro e micro evolutivos em Drosophila incompta (Diptera, Drosophilidae)
(Universidade Federal de Santa Maria, 2016-03-28)
The flavopilosa group was proposed by Wheeler and colleagues in 1962. In taxonomic terms, it seems to be a monophyletic group, belonging to virilis-repleta radiation of the Drosophila subgenus. However, the exact position ...
Agressão interespecífica em lagostins: invasões biológicas, dominância e exclusão competitiva (Crustacea: Astacidea)
(Universidade Federal de Santa Maria, 2016-01-29)
Interspecific aggression is a common ecological phenomenon, but is still very poorly understood. It is related to the obtention of resources, geographic distribution patterns and species replacement, in the case of biological ...
Distribuição de macroinvertebrados, com ênfase no gênero Hyalella (Crustacea: Peracarida: Amphipoda), em ambientes lênticos e lóticos do sul do Brasil
(Universidade Federal de Santa Maria, 2015-07-24)
Aquatic environments have been altered due to the increase of anthropogenic activities. The degradation of aquatic ecosystems has reached alarming levels, particularly in freshwater ecosystems. Water resources monitoring ...
Um conto sobre a agressividade: valor de recurso, tomada de decisão e adaptações morfológicas
(Universidade Federal de Santa Maria, 2017-02-15)
Agonistic behavior is ubiquituous in nature. Hence, understanding how and why it occurs is fundamental for unravelling its influence in the evolution of behavior. The goals of this thesis are: to test the influence of ...
Biomarcadores de toxicidade em Loricariichthys anus (Valenciennes, 1835) e Geophagus brasiliensis (Quoy & Gaimard, 1824): influência de variáveis abióticas e da poluição agrícola
(Universidade Federal de Santa Maria, 2019-04-02)
Limnic environments are threatened worldwide, receiving loads of pollutants from various anthropogenic
activities. Brazil is one of the largest consumers of agrochemicals, especially pesticides.
These will eventually ...
Origem e irradiação dos sauropodomorfos: novos espécimes e suas implicações
(Universidade Federal de Santa Maria, 2018-12-11)
The origin and early irradiation of sauropodomorph dinosaurs received much attention in response of new
discoveries from fossiliferous strata from South America. However, there are still doubts regarding the
transitionary ...
Variação geográfica do tamanho e forma do crânio de mamíferos com ampla distribuição na América do Sul (Marsupialia, Xenarthra e Glires)
(Universidade Federal de Santa Maria, 2018-02-23)
Skulls are complex morphological structures that exhibit phenotypic plasticity and adaptations to
different functions and processes, and are under different pressures, such as the geographical or
environmental ones. South ...
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 ...
Anatomia, taxonomia e filogenia de Siriusgnathus niemeyerorum (Eucynodontia, Traversodontidae) do Triássico Superior sul-brasileiro
(Universidade Federal de Santa Maria, 2019-04-30)
This thesis provides information of new traversodontid cynodont taxon, Siriusgnathus niemeyerorum,
which is closely related to Exaeretodon, although the new taxonomic unit shows a unique combination
of features not present ...
Um novo espécime de loricata (Archosauria: Pseudosuchia) proveniente da sequência pinheiros-chiniquá (zona de associação de dinodontosaurus), Bacia do Paraná: descrição, taxonomia e considerações filogenéticas
(Universidade Federal de Santa Maria, 2017-05-25)
“Rauisuchia” is an important group of pseudosuchians widely distributed on the planet
during the Meso-Triassic atually except for Antarctica and Australia. This present thesis
presents the description and phylogenetic ...