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593 results for “fish distribution”
Geodatabase Dataset of the Distribution of Inland Water fish fauna of Freshwater Systems in Northern Greece
<p>Abstract</p> <p>The dataset is a geodatabase focusing on the distribution of freshwater fish species in Northern Greece. The study area encompasses various lakes and rivers within the regions of Thrace, Eastern, Central, and Western Macedonia, and Epirus. It classifies fish species into three categories based on their conservation status according to the IUCN Red List: Critically Endangered, Endangered, and Vulnerable. The data analysis reveals that the study area is characterized by high fish diversity, particularly in certain ecosystems such as the Evros River, Strymonas River, Aliakmonas River, Axios River, Volvi Lake, Nestos River, and Prespa Lake. These ecosystems serve as important habitats for various fish species. Mapping of the dataset shows the geographic distribution of threatened fish species, indicating that Northern Greece is a hotspot for species facing extinction risks. Overall, the dataset provides valuable insights for researchers, policymakers, and conservationists in understanding the status of fish fauna in Northern Greece and developing strategies for the protection and preservation of these important ecosystems.</p> <p>Methods</p> <p>Data Collection: The dataset was collected through a combination of field surveys, literature reviews, and the compilation of existing data from various reliable sources. Here's an overview of how the dataset was collected and processed:</p> <ul> <li>Freshwater Fishes and Lampreys of Greece: An Annotated Checklist </li> <li>The Red Book of Endangered Animals of Greece</li> <li>The "Red List of Threatened Species"</li> <li>The study "Monitoring and Evaluation of the Conservation Status of Fish Fauna Species of Community Interest in Greece"</li> <li>The international online fish database FishBase</li> </ul> <p>Data Digitization and Georeferencing: To create a comprehensive database, we digitized and georeferenced the collected data from various sources. This involved converting information from papers, reports, and surveys into digital formats and associating them with specific geographic coordinates. Georeferencing allowed us to map the distribution of fish species within the study area accurately.</p> <p>Data Integration: The digitized and georeferenced data were then integrated into a unified geodatabase. The geodatabase is a central repository that contains both spatial and descriptive data, facilitating further analysis and interpretation of the dataset.</p> <p>Data Analysis: We analyzed the collected data to assess the distribution of fish species in Northern Greece, evaluate their conservation status according to the IUCN Red List categories, and identify the threats they face in their respective ecosystems. The analysis involved spatial mapping to visualize the distribution patterns of threatened fish species.</p> <p>Data Validation: To ensure the accuracy and reliability of the dataset, we cross-referenced the information from different sources and validated it against known facts about the species and their habitats. This process helped to eliminate any discrepancies or errors in the dataset.</p> <p>Interpretation and Findings: Finally, we interpreted the analyzed data and derived key findings about the diversity and conservation status of freshwater fish species in Northern Greece. The results were presented in the research paper, along with maps and visualizations to communicate the spatial patterns effectively.</p> <p>Overall, the dataset represents a comprehensive and well-processed collection of information about fish fauna in the study area. It combines both spatial and descriptive data, providing valuable insights for understanding the distribution and conservation needs of freshwater fish populations in Northern Greece.</p> <p> </p> <p>Usage notes</p> <p>The data included with the submission is stored in a geodatabase format, specifically an ESRI Geodatabase (.gdb). A geodatabase is a container that can hold various types of geospatial data, including feature classes, attribute tables, and raster datasets. It provides a structured and organized way to store and manage geographic information.</p> <p>To open and work with the geodatabase, you will need GIS software that supports ESRI Geodatabase formats. The primary software for accessing and manipulating ESRI Geodatabases is ESRI ArcGIS, which is a proprietary GIS software suite. However, there are open-source alternatives available that can also work with Geodatabase files.</p> <p>Open-source software such as QGIS has support for reading and interacting with Geodatabase files. By using QGIS, you can access the data stored in the geodatabase and perform various geospatial analyses and visualizations. QGIS is a powerful and widely used open-source Geographic Information System that provides similar functionality to ESRI ArcGIS.</p> <p>For tabular data within the geodatabase, you can export the tables as CSV files and open them with software like Microsoft Excel or the open-source alternative, LibreOffice Calc, for further analysis and manipulation.</p> <p>Overall, the data provided in the submission is in a geodatabase format, and you can use ESRI ArcGIS or open-source alternatives like QGIS to access and work with the geospatial data it contains.</p>
Data: Cumulative heat stress in fluctuating temperatures and implications for the distribution of freshwater fish
Open the record for dataset details and reuse information.
Assessing patterns and risk to Chilean freshwater fish distributions using multi-species occupancy models
Open the record for dataset details and reuse information.
Thermal stratification and fish thermal preference explain vertical eDNA distributions in lakes
<p>Significant advances have been made towards surveying animal and plant communities using DNA isolated from environmental samples. Despite rapid progress, we lack a comprehensive understanding of the "ecology" of environmental DNA (eDNA), particularly its temporal and spatial distribution and how this is shaped by abiotic and biotic processes. Here, we tested how seasonal variation in thermal stratification and animal habitat preferences influence the distribution of eDNA in lakes. We sampled eDNA depth profiles of five dimictic lakes during both summer stratification and autumn turnover, each containing warm- and cool-water fishes as well as the cold-water stenotherm, lake trout (<i>Salvelinus namaycush</i>). Habitat use by <i>S. namaycush</i> was validated by acoustic telemetry and was significantly related to eDNA distribution during stratification. Fish eDNA became "stratified" into layers during summer months, reflecting lake stratification and the thermal niches of the species. During summer months, <i>S. namaycush</i>, which rarely ventured into shallow waters, could only be detected at the deepest layers of the lakes, whereas the eDNA of warm-water fishes was much more abundant above the thermocline. By contrast, during autumn lake turnover, the fish species assemblage as detected by eDNA was homogenous throughout the water column. These findings contribute to our overall understanding of the "ecology" of eDNA within lake ecosystems, illustrating how the strong interaction between seasonal thermal structure in lakes and thermal niches of species on very localised spatial scales influences our ability to detect species.</p>
DATA & CODE for "Substrate-dependent fish have shifted less in distribution under climate change"
<p>Authors: Sarah M. Roberts*<sup>1</sup>, Andre M. Boustany<sup>2</sup>, Patrick N. Halpin<sup>1</sup></p> <p><strong>Author affiliations: </strong></p> <p>*<sup>1</sup>Marine Geospatial Ecology Lab, Nicholas School of the Environment and Earth Sciences, Duke University, Durham, NC 27708, US</p> <p><sup>2 </sup>Monterey Bay Aquarium, 886 Cannery Row, Monterey, CA 93940, USA</p> <p>This dataset and code run the necessary methods for the manuscript titled: "<strong>Substrate-dependent fish have shifted less in distribution under climate change. </strong><strong>Substrate-dependent fish have shifted less in distribution under climate change" </strong>published in Nature Communications Biology. In order to run the code, you need to request data from <a href="https://oceanadapt.rutgers.edu/">https://oceanadapt.rutgers.edu/</a>. The download is free, I just don't have permission to publish their data. Software needed is Rstudio and R. This is the updated and current version. </p>
Data from: Differential persistence favors habitat preferences that determine the distribution of a reef fish
A central focus of population ecology is understanding what factors explain the distribution and abundance of organisms within their range. This is a key issue in marine systems, where many organisms produce dispersive larvae that develop offshore before returning to settle on benthic habitat. We investigated the distribution of the neon goby, Elacatinus lori, on sponge habitat and evaluated whether variation in the persistence of recently settled individuals (i.e., settlers) among different sponge types can result in habitat preferences and establish their observed distribution. We found that E. lori settlers were more likely to occur on large yellow tube sponges (Aplysina fistularis) than on small yellow sponges or brown tube sponges (Agelas conifera). An experiment seeding settlers onto multiple species and sizes of sponge habitat revealed that settlers persist longer on large yellow sponges than on small yellow sponges or brown sponges. Habitat preference experiments also indicated that settlers prefer large yellow sponges over small yellow sponges or brown sponges. Settlers achieved these preference behaviors using visual, but not chemical, cues. Finally, new settlers arriving from the water column were more likely to occur on large yellow sponges than on small yellow sponges or brown sponges, indicating that the observed habitat preferences existed independent of prior experience. These results support the hypothesis that E. lori have evolved behavioral preferences for sponge habitats that will maximize their post-settlement persistence, and that decisions at settlement will shape the population level pattern of settler distribution on coral reefs.
Figure 86 in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report
Figure 86: Correlation between the surface area and maximum depth of lakes surveyed in Projet Lac.
Fish species reported to occur in the lake but not recorded in Projet Lac in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report
Fish species reported to occur in the lake but not recorded in Projet Lac
Figure 69 c in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report
Figure 69 c)
Figure 68 in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report
Figure 68: Fish from Projet Lac being prepared by museum staff for long-term preservation.
Figure 64 in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report
Figure 64: Electrofishing from boat (left) and by wading (right).
Figure 45 in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report
Figure 45: Diversity of Salmo spp recorded in Projet Lac.
Figure 69 b in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report
Figure 69 b
Figure 48 in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report
Figure 48: The three forms of Salvelinus in Swiss lakes described by Konrad Gessner in 1575.
Figure 57 in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report
Figure 57: Extremes of variation in fin colour in Perca fluviatilis within and among lakes.
Figure 60 in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report
Figure 60: An example of a littoral habitat map from Lake Bret.
Figure 2 in Diversity, distribution and community composition of fish in perialpine lakes – "Projet Lac" synthesis report
Figure 2: Example of the distribution of sampling actions throughout a lake (Constance Untersee).
Fig. 1 in Distribution Of Trematodes Cryptokotyle (Trematoda, Heterophyidae), In Fish Of The Family Gobiidae In The Estuary Waters And The Black Sea In Southern Ukraine
Fig. 1. Sites of material collection.
Fig. 4. C in Distribution Of Trematodes Cryptokotyle (Trematoda, Heterophyidae), In Fish Of The Family Gobiidae In The Estuary Waters And The Black Sea In Southern Ukraine
Fig. 4. C. jejuna in motionduring microscopy of mucus. х200 magnification.
A Permian fish reveals widespread distribution of neopterygian-like jaw suspension
<p>The actinopterygian crown group (comprising all living ray-finned fishes) originated by the end of the Carboniferous. However, most late Paleozoic taxa are stem actinopterygians, and broadly resemble stratigraphically older taxa. The early Permian †<em>Brachydegma</em> <em>caelatum</em> is notable for its three-dimensional preservation and past phylogenetic interpretations as a nested member of the neopterygian crown. Here, we use computed microtomography to redescribe †<em>Brachydegma</em>, uncovering an unanticipated combination of primitive (e.g., aortic canal; immobile maxilla) and derived (e.g., differentiated occipital ossifications; posterior stem of parasphenoid; two accessory hyoidean ossifications; double jaw joint) endoskeletal features relative to most other Paleozoic actinopterygians. Some of these features were previously thought restricted to the neopterygian crown. The precise phylogenetic position of †<em>Brachydegma</em> is unclear, with placements either on the polypterid stem, or as an early-diverging stem neopterygian. However, our analyses decisively reject previous placements of †<em>Brachydegma</em> in the neopterygian crown. Critically, we demonstrate that key-endoskeletal components of the hyoid portion of the suspensorium of crown neopterygians appeared deeper in the tree than previously thought.</p>
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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International Brain Laboratory public data
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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.