Results 1 to 10 of about 486 (161)

Contrasting evolutionary responses in two co-distributed species of Galaxias (Pisces, Galaxiidae) in a river from the glaciated range in Southern Chile [PDF]

open access: yesRoyal Society Open Science, 2020
Life-history traits are among the most important factors affecting population abundance and genetic diversity of species. Here, we analysed the genetic patterns of two Galaxias species with different life-history traits to investigate how these ...
P. F. Victoriano   +7 more
doaj   +2 more sources

Cryptic diversity within two widespread diadromous freshwater fishes (Teleostei: Galaxiidae) [PDF]

open access: yesEcology and Evolution
Identification of taxonomically cryptic species is essential for the effective conservation of biodiversity. Freshwater‐limited organisms tend to be genetically isolated by drainage boundaries, and thus may be expected to show substantial cryptic ...
Charlotte Jense   +8 more
doaj   +2 more sources

Pathology associated with larval Eustrongylides sp. (Nematoda: Dioctophymatoidea) infection in Galaxias maculatus (Actinopterygii: Galaxiidae) from Patagonia, Argentina [PDF]

open access: yesInternational Journal for Parasitology: Parasites and Wildlife, 2019
Helminth infections within tissues tend to be subjected to a host response that can include encapsulation and melanization to isolate the parasite. The effectiveness of this response depends on the host species. During a survey of parasites of the native
Silvia Guagliardo   +2 more
doaj   +2 more sources

Policy decisions matter: Cessation of logging benefits 34 threatened species in Victoria, Australia. [PDF]

open access: yesPLoS ONE
In January 2024, the Australian state of Victoria committed to ending native forest logging six years ahead of schedule, a decision that has been advocated for by scientists and conservationists for decades.
Kita R Ashman   +12 more
doaj   +2 more sources

Galaxias Enanas del Grupo Local

open access: yesMomento, 2009
The satellite galaxies of the Milky Way are very important both for the studies of the formation and evolution of galaxies and for the research on the dark matter problem. In the present review paper some structural properties of the Local Group, as well
A Casallas Lagos   +2 more
doaj   +2 more sources

Como se formaram as galáxias? [PDF]

open access: yesRevista Brasileira de Ensino de Física, 2023
Apresentamos aqui uma discussão pedagógica do processo de formação de estruturas (galáxias e além) no Universo, com um mínimo de formalismo e ênfase nas ideias físicas que colocam a instabilidade gravitacional como o principal agente do mesmo.
J.E. Horvath
doaj   +1 more source

Complexidade em Astronomia e Astrofísica [PDF]

open access: yesRevista Brasileira de Ensino de Física, 2021
A Astronomia e a Astrofísica, em sinergia à Física e à Cosmologia Moderna e Contemporânea, têm como principal objetivo entender, por meio de métodos matemáticos, computacionais e observacionais, os processos (astro)físicos fundamentais relacionados à ...
Alan Alves-Brito, A. Cortesi
doaj   +1 more source

Morphological Convergence and Divergence in Galaxias Fishes in Lentic and Lotic Habitats

open access: yesDiversity, 2020
The influence of contrasting lentic and lotic hydrological environments on the morphology of members of the Galaxias vulgaris species complex was examined.
Nicholas R. Dunn   +3 more
doaj   +1 more source

IMPLEMENTAÇÃO DA TRANSFORMADA DE FOURIER BIDIMENSIONAL PARA ANÁLISE DE ESTRUTURAS ESPIRAIS EM GALÁXIAS

open access: yesRevista UniVap, 2023
As galáxias espirais normais possuem um núcleo, disco, bojo, halo e braços espirais. Esses sistemas despertam muita curiosidade, atração e questionamentos científicos e consequentemente, muitos estudos e técnicas são propostas para análise destas ...
Stella Faria Costa   +2 more
doaj   +1 more source

The Role of Supercomputing in Research: Astrophysics of Galactic Nuclei and Black Holes

open access: yesInterfases, 2015
This article is based on the application of supercomputing techniques through an example in the investigation of the astronomical phenomena of evolution of galactic nuclei and black holes within the time period of the Universe’s existence.
José Antonio Fiestas-Iquira
doaj   +1 more source

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