Contrasting evolutionary responses in two co-distributed species of Galaxias (Pisces, Galaxiidae) in a river from the glaciated range in Southern Chile [PDF]
Royal 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
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Contrasting Patterns of Genetic Diversity and Divergence Between Landlocked and Migratory Populations of Fish Galaxias maculatus, Evaluated Through Mitochondrial DNA Sequencing and Nuclear DNA Microsatellites [PDF]
Frontiers in Genetics, 2022 Galaxias species are interesting biogeographic models due to their distribution and different types of life cycles, with migratory and landlocked populations.
Marcela P. Astorga +11 more
doaj +2 more sources
Cryptic diversity within two widespread diadromous freshwater fishes (Teleostei: Galaxiidae) [PDF]
Ecology and EvolutionIdentification 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
Effects of the cranial parasite Tylodelphys sp. on the behavior and physiology of puye Galaxias maculatus (Jenyns, 1842) [PDF]
PeerJ, 2021 Diplostomatid digeneans are well-known manipulators of the behavior of their intermediate hosts. Unencysted metacercariae of Tylodelphys sp. inhabit the cranial cavity of the fish Galaxias maculatus; however, to date they have not been documented to ...
Ruby López-Rodríguez +2 more
doaj +3 more sources
Policy decisions matter: Cessation of logging benefits 34 threatened species in Victoria, Australia. [PDF]
PLoS ONEIn 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
Pathology associated with larval Eustrongylides sp. (Nematoda: Dioctophymatoidea) infection in Galaxias maculatus (Actinopterygii: Galaxiidae) from Patagonia, Argentina [PDF]
International 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
Como se formaram as galáxias? [PDF]
Revista 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
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Revista 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
Complexidade em Astronomia e Astrofísica [PDF]
Revista 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
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Morphological Convergence and Divergence in Galaxias Fishes in Lentic and Lotic Habitats
Diversity, 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