Results 1 to 10 of about 199 (111)

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, Mario George-Nascimento, Konrad Górski   +2 more
doaj   +3 more sources

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, Andrea Valenzuela, Nicolás I. Segovia, Nicolás I. Segovia, Elie Poulin, Elie Poulin, Luis Vargas-Chacoff, Luis Vargas-Chacoff, Luis Vargas-Chacoff, Claudio A. González-Wevar, Claudio A. González-Wevar, Claudio A. González-Wevar   +11 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, Gustavo Viozzi, Norma Brugni   +2 more
doaj   +2 more sources

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, C. P. Muñoz-Ramírez, C. B. Canales-Aguirre, A. Jara, I. Vera-Escalona, T. Burgos-Careaga, C. Muñoz-Mendoza, E. M. Habit   +7 more
doaj   +2 more sources

The impact of isosmotic conditions on the metabolism and hypoxia tolerance of a reportedly oxyconforming teleost. [PDF]

J Fish Biol
Abstract Fish must manage the competing demands of ion balance and gas exchange across the gills – a physiological tension known as the osmorespiratory compromise. In dynamic estuarine environments, the osmorespiratory compromise may be exacerbated by variable salinity and periods of hypoxia that demand high respiratory work.
Clark TD, Kuchenmüller LL, Hoots EC, Gradito M, Martin JM.   +4 more
europepmc   +2 more sources

Unpacking the complexity of longitudinal movement and recruitment patterns of facultative amphidromous fish [PDF]

Scientific Reports, 2022
Longitudinal movement plays fundamental role in habitat colonization and population establishment of many riverine fish species. Movement patterns of amphidromous fish species at fine-scales that would allow characterizing the direction of movement and ...
Rodrigo Ramírez-Álvarez, Sergio Contreras, Aurélien Vivancos, Malcolm Reid, Ruby López-Rodríguez, Konrad Górski   +5 more
doaj   +2 more sources

Isolation Driven Divergence in Osmoregulation in Galaxias maculatus (Jenyns, 1848) (Actinopterygii: Osmeriformes). [PDF]

PLoS ONE, 2016
BACKGROUND:Marine species have colonized extreme environments during evolution such as freshwater habitats. The amphidromous teleost fish, Galaxias maculatus is found mainly migrating between estuaries and rivers, but some landlocked populations have ...
Ignacio Ruiz-Jarabo, Claudio A González-Wevar, Ricardo Oyarzún, Juan Fuentes, Elie Poulin, Carlos Bertrán, Luis Vargas-Chacoff   +6 more
doaj   +2 more sources

Development of a Trait-Based Risk Assessment to Minimise the Impacts of Trout on New Zealand Native Fishes. [PDF]

Ecol Evol
A trait‐based risk assessment framework was developed to identify New Zealand's native freshwater fish most vulnerable to the pressures of valued sports fisheries (trout). We further examine where the distributions between at‐risk species and trout are likely to overlap, providing priority locations for conservation managers to investigate further and ...
Coughlan A, Canning AD, Death RG.
europepmc   +2 more sources

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

Ecology 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, Mark Adams, Tarmo A. Raadik, Jonathan M. Waters, David L. Morgan, Leon A. Barmuta, Scott A. Hardie, Bruce E. Deagle, Christopher P. Burridge   +8 more
doaj   +2 more sources

Molecular Characterization of Eustrongylides sp. Infecting Channa punctata in Bangladesh. [PDF]

Vet Med Sci
In this study, a total of 137 medium‐sized Channa punctata (17.5 ± 2.5 cm) were collected from different locations of Jamalpur and Netrokona district, Bangladesh and microscopically identified as belonging to the genus Eustrongylides based on morphological characteristics.
Nibir SS, Dey AR, Rahman T, Suchona JT, Hossain S, Bushra SS, Juthy JP, Paul S, Tanwi JT, Tabassum T, Faruk MAR.   +10 more
europepmc   +2 more sources