Dam development is fragmenting migratory pathways in the Mekong Basin, yet scientific understanding of Mekong fish migrations is limited. Therefore, the first‐ever transboundary acoustic telemetry network was deployed in the Mekong, Sekong, and Sesan rivers in Cambodia and Lao PDR to track movements of 81 individual fish representing 12 different species from June 2022 through March 2024. Upstream movement by Pangasius conchop...

Fish biodiversity assessments are vital for understanding threats and aquatic ecosystem health. In the Poso River, Central Sulawesi, changes in biodiversity are influenced by habitat alteration, non-native species, and overfishing. This study evaluates fish and crustacean biodiversity in the Poso River system to address these challenges for improving fisheries management, conservation, and fish passage integration into hydropo...

As one of the world’s most regulated river basins, the semi-arid Murray–Darling Basin (MDB) in south-eastern Australia is considered at high ecological risk, with substantial declines in native fish populations already identified and climate change threats looming. This places great importance on the collection and use of data to document population trends over large spatial extents, inform management decisions, and provide ba...

Rivers suffer from multiple stressors acting simultaneously on their biota, but the consequences are poorly quantified at the global scale. We evaluated the biological condition of rivers globally, including the largest proportion of countries from the Global South published to date. We gathered macroinvertebrate‐ and fish‐based assessments from 72,275 and 37,676 sites, respectively, from 64 study regions across six continents...

In an era of ever‐increasing amounts of whole‐genome sequence data for individuals and populations, the utility of traditional single nucleotide polymorphisms ( SNP s) array‐based genome scans is uncertain. We previously performed a SNP array‐based genome scan to identify candidate genes under selection in six distinct grey wolf ( Canis lupus ) ecotypes. Using this information, we designed a targeted capture array for 1040 gen...

Freshwater rivers have been substantially altered by development and flow regulation. Altered hydrological regimes have affected a range of biota, but impacts are often most obvious on freshwater fish. Flow largely influences the range of physical habitat available to fish at various life history stages. Biological rhythms are therefore often linked to flow and optimized so that opportunities for spawning, growth and dispersal...

Seamounts have often been viewed as specialized habitats that support unique communities; this notion has given rise to several hypotheses about how seamount ecosystems are structured. One, the ‘seamount oasis hypothesis’, predicts that invertebrates are more abundant, speciose and attain higher standing stocks on seamounts compared to other deep‐sea habitats. Because this hypothesis has remained untested for biomass, we ask t...