Results 31 to 40 of about 242 (137)

Potential Impacts of Low Flows on Fish Foodscapes and Production in a Braided River

River Research and Applications, Volume 42, Issue 6, Page 1366-1382, July 2026.
ABSTRACT Changes in river discharge affect the physical composition and connectivity of habitats which, in turn, may shape the spatial distribution of fish food abundance, accessibility and quality—the ‘foodscape’—of river ecosystems. However, the influence of river flows on fish foodscapes has received very little attention from scientists. We studied
Rick J. Stoffels, Richard S. A. White, Gergely T. Torok, Richard J. Measures, Kristy L. Hogsden, Alex F. Rose, Paul W. Lambert, Jaret P. Bilewitch, S. Elizabeth Graham, Lisa Smith, Amber R. Brooks, Brian J. Smith   +11 more
wiley   +1 more source

Virial theorem and gravitational equilibrium with a cosmological constant

Momento, 2001
Starting from the Newtonian limit of Einstein's equations in the presence of a positive cosmological constant, we obtain a new version of the virial theorem and a condition for gravitational equilibrium. Such a condition takes the form ρ > λρvac, where ρ
Marek Nowakowski, Juan Carlos Sanabria, Alejandro García   +2 more
doaj  

The impact of isosmotic conditions on the metabolism and hypoxia tolerance of a reportedly oxyconforming teleost

Journal of Fish Biology, Volume 109, Issue 1, Page 201-209, July 2026.
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.
Timothy D. Clark, Luis L. Kuchenmüller, Elizabeth C. Hoots, Maryane Gradito, Jake M. Martin   +4 more
wiley   +1 more source

Perturbações cosmológicas e a taxa de crescimento das flutuações da matéria

Revista Brasileira de Ensino de Física
As estruturas observadas no universo (galáxias, aglomerados e superaglomerados de galáxias) são resultados da instabilidade gravitacional. Esta instabilidade amplifica perturbações, originalmente muito pequenas, até o regime não linear.
R.F. Vom Marttens, F.K. Ribeiro, W. Zimdahl   +2 more
doaj   +1 more source

Geological processes shaping freshwater biodiversity: a synthesis of global evidence

Biological Reviews, Volume 101, Issue 3, Page 1568-1581, June 2026.
ABSTRACT Recent genomic data highlight the key roles of geological processes in shaping the diversification and biogeography of freshwater lineages. Specifically, physical processes such as tectonic uplift, erosion, glaciation, lake formation, and sea‐level fluctuation contribute extensively to the evolution of biotic diversity within and among ...
Jonathan M. Waters, Christopher P. Burridge, David Craw, James S. Albert   +3 more
wiley   +1 more source

Swimming Under the Radar: Trout‐Free Kōaro Populations in Aotearoa Lakes and Tarns Are Rare, Understudied, and Disappearing

New Zealand Journal of Marine and Freshwater Research, Volume 60, Issue 2, June 2026.
Over the last 150 years, most large, easily accessible lakes and tarns in Aotearoa (New Zealand) have experienced trout introductions or incursions, leaving few salmonid‐free reference lakes. Using database information and field surveys, we characterized lake, pond/tarn, and wetland systems found throughout Aotearoa that support populations of kōaro ...
Lauren G. Hitt, Simon D. Stewart, Nixie C. Boddy, Angus R. McIntosh   +3 more
wiley   +1 more source

Tradução em ensaio (ensaio de tradução): uma hermenêutica do fazer

Remate de Males, 2018
Se traduzir a quatro mãos pode resultar numa tarefa ao mesmo tempo apaixonante e simples, traduzir a quatro mãos por correspondência nem sempre é fácil principalmente se considerarmos que a comunicação eletrônica é bastante recente e que nas décadas de ...
Inês Oseki-Dépré
doaj   +1 more source

Geographic variation in composition of metazoan parasite infracommunities in Galaxias maculatus Jenyns 1842 (Osmeriformes: Galaxiidae) in southern Chile (38-47° S)

Revista Chilena de Historia Natural, 2020
Galaxias maculatus is an abundant freshwater fish species in Chilean continental waters where it plays important ecological functions, yet few parasitological records of this species exist in Chile and all of them cover a very limited geographic range ...
Mario George-Nascimento, Ruby López-Rodríguez, Konrad Górski   +2 more
doaj   +1 more source

Two Germans, a Swede, and a Giant kōkopu: The Background to the Earliest Documented Description of a New Zealand Freshwater Fish

New Zealand Journal of Marine and Freshwater Research, Volume 60, Issue 2, June 2026.
Galaxiids are a family of scaleless and mostly small freshwater fish which are distributed across the temperate latitudes of the southern hemisphere. The largest member of this family is the giant kōkopu (Galaxias argenteus), which has the added distinction of being the first New Zealand freshwater fish of any kind to be scientifically described.
James Braund
wiley   +1 more source

Galaxias / Galaxies

Gragoatá, 2011
Book reviewed: Campos, Haroldo de. Galaxias/Galáxias. Tradução ao espanhol e notas de Reynaldo Joménez. Prólogo de Roberto Echavarren.
Rosario Lázaro Igoa
doaj