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93 results for “fish biodiversity”
Data from: Inferring riverscape dispersal processes from fish biodiversity patterns
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Integration of environmental DNA metabarcoding technique to reinforce fish biodiversity assessments in seagrass ecosystems: A case study of Gazi Bay Seagrass meadows
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Global Regionalized Characterization Factors for Phosphorus and Nitrogen Impacts on Freshwater Fish Biodiversity
<p>Overview and guidance for using the data in "CFs_freshwater_eutrophication" related to the article "Global Regionalized Characterization Factors for Phosphorus and Nitrogen Impacts on Freshwater Fish Biodiversity"</p> <p> </p> <p>See the "readme_CFs_freshwater_eutrophication.pdf" file to find the details of the enclosed data.</p> <p> </p> <p>Units</p> <ul> <li>Phosphorus from direct emissions to freshwater or diffuse sources on the soil: PDF·year/kgP</li> <li>Nitrogen from direct emissions to freshwater or diffuse sources on the soil: PDF·year/kgN</li> <li>Erosion: PDF·year/(m2·year)</li> </ul> <p>Please excuse any typos in the units in the xlsx files.</p>
Temporal variations of the multifaceted biodiversity and assembly mechanisms in lake fish assemblages
<p>Understanding long-term changes of fish diversity and community assembly rules is crucial for freshwater conservation. Growing evidence indicates that studying functional and phylogenetic diversity beyond purely taxonomic considerations can provide different but complementary information on community assembly. Here, the taxonomic, functional and phylogenetic β-diversity of fish communities, as well as the community assembly mechanisms were explored in five impounded lakes of the China's South-to-North Water Diversion Project (SNWDP) from the 1980s to the 2010s. We found that: 1) there was an obvious trend of species homogenization in the five impounded lakes, but the long-term transformations of different dimensional β-diversities were divergent; 2) water quality and land use variables have greater impacts in multi-dimensional β-diversity; and, 3) community assembly process in taxonomic and functional dimensions were dominated by random process in both periods, while shifted from limiting similarity to habitat filtering in the phylogenetic dimension. These results highlight that functional and phylogenetic diversity are important additional ecological indices for assessing patterns of fish diversity in lakes.</p>
Figure:1 Fish classification and taxonomy in Artificial Intelligence Applications in Fish Classification and Taxonomy: Advancing Our Understanding of Aquatic Biodiversity
Figure:1 Fish classification and taxonomy
Using eDNA for monitoring fish and invertebrate biodiversity in freshwater ecosystems
<p>Global biodiversity is facing an extinction crisis leading to increasing pressure on industries to monitor their potential environmental impact. Relatedly, there is demand for more efficient biodiversity monitoring methods, resulting in growing interest in the use of environmental DNA (eDNA). Many questions, however, regarding the reliability of this relatively novel method remain, particularly for non-specialist end-users of the technology.</p> <p>Here, the use of commercially available (in the UK) eDNA assays for monitoring freshwater fish and invertebrate biodiversity was compared to conventional surveillance techniques. Samples were collected from different habitats, on varying spatial scales and using multiple sampling regimes to assess how eDNA results were affected.</p> <p>For aquatic macroinvertebrates and fish, more taxa were detected by eDNA than conventional surveys conducted in parallel, and for fish, all taxa detected by conventional monitoring were confirmed by eDNA.</p> <p>For aquatic macroinvertebrates, several species were only detected through conventional methods, and the number of families detected by eDNA was lower than for conventional monitoring at all sites.</p> <p>eDNA results varied significantly between sampling locations within lentic sites and, for lotic sites, with the number of subsamples collected.</p> <p>In terms of practical implications, this study demonstrates the need for bespoke sampling protocols when collecting eDNA samples. This study improves understanding of using eDNA for detecting aquatic taxa that could inform species surveillance protocols. These are essential if eDNA is to be used by practitioners as a regulatory monitoring tool.</p>
Arctic Biodiversity: Arctic Freshwater Fishes
Biogeography and other attributes for Arctic organisms, various sources.<p></p>Meltofte, H. (ed.) 2013. Arctic Biodiversity Assessment. Status and trends in Arctic biodiversity. Conservation of Arctic Flora and Fauna, Akureyri. <p></p>https://arcticbiodiversity.is/index.php/the-report/chapters/fishes
Arctic Biodiversity: Arctic Marine Fishes (998) DwCA
Biogeography and other attributes for Arctic organisms, various sources.<p></p>Meltofte, H. (ed.) 2013. Arctic Biodiversity Assessment. Status and trends in Arctic biodiversity. Conservation of Arctic Flora and Fauna, Akureyri. <p></p>https://arcticbiodiversity.is/index.php/the-report/chapters/fishes
Analysing spatio-temporal patterns of non-native fish in a biodiversity hotspot across decades
<p><strong>Aim</strong>: Analysing the spatio-temporal patterns and dynamics of non-native species is essential to understanding the mechanisms underlying successful invasions and developing effective management strategies. Yet, such analyses generally neglect the influence of receiving ecosystem types and non-native species sources (i.e. alien species, non-natives originating outside the concerned region; translocated species, nonnatives introduced to locations outside their historical range within the concerned region). </p> <p><strong>Location</strong>: Yunnan, China.</p> <p><strong>Methods</strong>: We analysed long-term (1950–2022) spatio-temporal patterns and potential underlying dynamics of non-native fishes in a biodiversity hotspot (Yunnan, China), paying special attention to waterbody types receiving non-native species and comparing alien and translocated species. We did this through compiling a highly comprehensive occurrence dataset of native and non-native fishes.</p> <p><strong>Results</strong>: We recorded 783 native species and 94 non-native species (49 alien species and 45 translocated species), which mainly belonged to the order Cypriniformes (52 species) and were introduced via purposes for advancing aquaculture. Most frequently encountered non-native species were either intentionally introduced aquaculture species or small-bodied fish unintentionally introduced via aquaculture activities. The richness and spatial ranges of non-native fishes increased consistently since the 1950s and demonstrated a pronounced change after the 2000s, with densely populated areas and the middle to lower reaches of large rivers being more profoundly affected. The number of records of translocated species exceeded the number of records of alien species after the 2000s. Lakes and reservoirs are hotspots for both alien and translocated species introductions, and watersheds with large areas in Yunnan (e.g. the Jinsha-Yangtze and Lancang-Mekong basins) contained more non-native fish.</p> <p><strong>Main Conclusions</strong>: Our study highlights the need to consider invasion sensitivities of receiving ecosystems and pay special attention to intra-regional species translocations when developing prevention and management strategies against invasions of alien species, particularly in important biodiversity hotspots around the world.</p>
Using eDNA for monitoring fish and invertebrate biodiversity in freshwater ecosystems
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Data from: Invasive fish reshape biodiversity patterns in China’s freshwater lakes
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Data from: Losing cichlid fish biodiversity: genetic and morphological homogenization of tilapia following colonization by introduced species
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Analysing spatio-temporal patterns of non-native fish in a biodiversity hotspot across decades
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Data from: Endemic fish promote ecological structure in a tropical biodiversity hotspot
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Fish communities critically depend on forest subsidies in small neotropical streams with high biodiversity value
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Data from: Explaining the ocean’s richest biodiversity hotspot and global patterns of fish diversity
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Data from: Ecological specialisation of reef fishes peaks in global biodiversity hotspots
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Temporal variations of the multifaceted biodiversity and assembly mechanisms in lake fish assemblages
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Absolute fish population censuses in ponds demonstrate eDNA metabarcoding provides biodiversity estimates comparable to conventional sampling methods
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Newly discovered cichlid fish biodiversity threatened by hybridization with non-native species - Data supporting published version
<p><span><a name="_Hlk503794553"><span>Invasive freshwater fish systems are known to readily hybridize with indigenous congeneric species, driving loss of unique and irreplaceable genetic resources. Here we reveal that newly discovered (2013-2016) evolutionarily significant populations of Korogwe tilapia (<i>Oreochromis korogwe</i>) from southern Tanzania are threatened by hybridization with the larger invasive Nile tilapia (<i>Oreochromis niloticus</i>). We use a combination of morphology, microsatellite allele frequencies and whole genome sequences to show that <i>O. korogwe</i> from southern lakes (Nambawala, Rutamba and Mitupa) are distinct from geographically-disjunct populations in northern Tanzania (Zigi River and Mlingano Dam). We also provide genetic evidence of <i>O. korogwe</i> x <i>niloticus</i> hybrids in three southern lakes and </span></a><span>demonstrate heterogeneity in the extent of admixture across the genome. Finally, using the least admixed genomic regions we estimate that the northern and southern <i>O. korogwe</i> populations most plausibly diverged approximately 140,000 years ago, suggesting that the geographical separation of the northern and southern groups is not a result of a recent translocation, and instead these populations represent independent evolutionarily significant units. We conclude that these newly-discovered and phenotypically unique </span><span>cichlid populations are already threatened by hybridization with an invasive species, and propose that these irreplaceable genetic resources would benefit from conservation interventions.</span></span></p>
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.