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Monkeys Swimming Across Rivers Refine Questions About the Riverine Barrier Hypothesis.
Am J Primatol
January 2025
Department of Anthropology and Archaeology, University of Calgary, Calgary, Alberta, Canada.
The Riverine Barrier Hypothesis posits that species distributions are limited by large rivers acting as geographical barriers. Accordingly, large rivers have long been thought to be a major driver of the extensive speciation and high levels of biodiversity among platyrrhine primates in South and Central America. Direct observations of river crossings provide evidence that complements studies of genetic diversity that can together shed new light on this hypothesis.
View Article and Find Full Text PDFAn in-situ study in the Xijiang River basin revealed adverse effects of total dissolved gas supersaturation on fish.
Ecotoxicol Environ Saf
January 2025
State Key Laboratory of Hydraulics and Mountain River Engineering, Sichuan University, Chengdu 610065, China.
High dam discharge can lead to total dissolved gas (TDG) supersaturation in downstream rivers, causing fish to suffer from bubble trauma and even mortality. Focusing on the Datengxia hydropower station in the Xijiang River basin, we conducted in-situ experiments to explore the tolerance patterns of economic fish species, including Ctenopharyngodon idella, Hypophthalmichthys molitrix, and Cirrhinus molitorella, under the influence of TDG supersaturation at different compensation depths. Moreover, the development and recovery patterns of bubble trauma and the swimming ability of fish exposed to TDG supersaturated water were investigated.
View Article and Find Full Text PDFPredicting fine-scale downstream migratory movement of Atlantic salmon smolt (Salmo salar) in front of a hydropower plant.
Sci Rep
December 2024
Norwegian Institute for Nature Research, Postbox 5685, 7485, Trondheim, Norway.
The Atlantic salmon (Salmo salar) is an iconic species of significant ecological and economic importance. Their downstream migration as smolts represents a critical life-history stage that exposes them to numerous challenges, including passage through hydropower plants. Understanding and predicting fine-scale movement patterns of smolts near hydropower plants is therefore essential for adaptive and effective management and conservation of this species.
View Article and Find Full Text PDFPrevalence and Risk Factors of Schistosomiasis in Sudan: A Systematic Review and Meta-Analysis.
Cureus
November 2024
Medical Microbiology, University of Khartoum, Khartoum, SDN.
Schistosomiasis is considered the most widespread parasitic infection. Both and are present, and as waterborne infections, their epidemiology is closely associated with proximity and exposure to freshwater sources. The objective of the current study is to estimate the pooled prevalence of schistosomiasis among the Sudanese population and examine any associated sociocultural risk factors.
View Article and Find Full Text PDFDifferential effects of pharmaceuticals and insecticides on swimming behaviour and survival in Gammarus pulex.
Sci Total Environ
January 2025
Aquatic Ecology and Water Quality Management Group, Wageningen University and Research, 6700AA Wageningen, the Netherlands. Electronic address:
Many freshwater systems are continuously exposed to waste streams like municipal wastewater and agricultural runoff, leading to exposure to chemicals that can cause mortality and behavioural changes in aquatic organisms. While research has advanced our understanding of pesticide effects on behaviour of aquatic organisms, the impacts of pharmaceuticals are less understood. Psychopharmaceuticals are particularly interesting because they can act on nervous systems, potentially affecting the behaviour of aquatic organisms.
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