Phylogeography in Galaxias maculatus (Jenyns, 1848) along Two Biogeographical Provinces in the Chilean Coast. [PDF]
PLoS ONE, 2015 Major geologic and climatic changes during the Quaternary exerted a major role in shaping past and contemporary distribution of genetic diversity and structure of aquatic organisms in southern South America.
Claudio A González-Wevar +7 more
doaj +2 more sources
Group swimming significantly decreases time to passage success for a galaxiid species. [PDF]
J Fish BiolAbstract We conducted laboratory experiments to explore the potential benefits of group behaviour on passage performance for a small‐bodied migratory species, inanga Galaxias maculatus. An artificial velocity barrier was created to compare the fish passage success of groups of fish to solitary individuals.
Crawford RMB +3 more
europepmc +2 more sources
Surviving historical Patagonian landscapes and climate: molecular insights from
BMC Evolutionary Biology, 2010 Background The dynamic geological and climatic histories of temperate South America have played important roles in shaping the contemporary distributions and genetic diversity of endemic freshwater species.
Carrea Cecilia +4 more
doaj +2 more sources
The Reproductive Biology of Puye (Galaxias maculatus) under Experimental Culture [PDF]
AnimalsThis study determines the reproductive patterns of puye (Galaxias maculatus) under culture conditions. A population of 567 wild fish was caught in the Cautín River, Chile, and held in captivity for four years.
Leydy Sandoval-Vargas +4 more
doaj +2 more sources
Brazilian Archives of Biology and Technology, 2006 The present study was conducted to determine if parasite induced mortality existed in a "puyen" population in Moreno Lake, southern Argentina. Data on both parasite abundance and degree of aggregation of parasite frequency distribution showed the absence
Jorge E. Revenga +2 more
doaj +2 more sources
Interactive Effects of Copper Contamination and Salinization Across Multiple Genotypes of <i>Daphnia magna</i>. [PDF]
Ecol EvolThis study examined how Daphnia magna genotypes from US and French populations respond to copper and salinity stress, alone and in combination. US genotypes were generally more sensitive but showed improved survival under combined stress, indicating possible cross‐tolerance mechanisms.
Hernandez Villatoro AM +4 more
europepmc +2 more sources
Latin American Journal of Aquatic Research, 2008 The nuclear DNA content (2C value) was determined in the commercial fish Galaxias maculatus (Galaxiidae) was determined by microdensitometry of erythrocyte nuclei after Feulgen staining; rainbow trout erythrocytes with a known 2C value were used as a ...
Pedro Jara-Seguel +3 more
doaj +1 more source
Assessing Patterns and Risk to Chilean Freshwater Fish Distributions Using Multi-Species Occupancy Models. [PDF]
Ecol EvolTo advance our understanding of freshwater biodiversity in data‐limited systems, this study used multispecies occupancy models to predict species richness and individual species occupancy, providing critical insights for the conservation of these rapidly declining ecosystems.
Tracy EE +4 more
europepmc +2 more sources
Teaching fish new tricks: Repeated exposure to a velocity barrier improves passage performance. [PDF]
PLoS ONEInstream structures like culverts and dams can impede upstream fish migration, acting as environmental filters that only allow onward migration of individuals that can successfully pass them.
Rachel Mb Crawford +4 more
doaj +2 more sources
Morphometric Response of Galaxias maculatus (Jenyns) to Lake Colonization in Chile
Diversity, 2020 Body and head shape in fish responds to environmental factors such as water flow rate, food sources, and niche availability. However, the way in which fish respond to these environmental factors varies.
Margaret Mercer +4 more
doaj +2 more sources