Browsing by Subject "Fishes of Texas"
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Item Clark Hubbs and the Fishes of Texas(0000-00-00) UnknownItem Documentation Related to a 1991 Observation of Sturgeon in the Rio Grande – Río Bravo, USA (Texas) and Mexico (Coahuila)(2018-05-03) Platania, Steven P.; Hendrickson, Dean A.; Cohen, Adam E.This digital archive provides a compilation of previously unpublished information regarding a 1991 observation of a live sturgeon (Family Acipenseridae) in the Rio Grande-Río Bravo of the USA and Mexico. Though a few specimens collected in the 19th century support occurrence of sturgeon in this river basin, lack of credible, recent records has often led to this species not being recognized as part of the basin’s native fish fauna, and certainly not part of its modern fish community. The second and third authors of this document manage the Fishes of Texas Project (Hendrickson, Dean A., & Cohen, Adam E. (2015). Fishes of Texas Project Database (version 2.0). Texas Advanced Computing Center, University of Texas at Austin. http://doi.org/10.17603/C3WC70) and knew of the unpublished 1991 observation of sturgeon reported here. They requested the content provided here from first author (Platania) who provided what follows below (verbatim as received in April 2018) and permission to archive it for public access.Item Final Report: Data provision and projected impact of climate change on fish biodiversity within the Desert LCC(2013-11-30) Cohen, Adam E.; Labay, Ben J.; Hendrickson, Dean A.; Casarez, Melissa; Sarkar, SahotraThe four primary objectives of this project were to: (1) compile a dataset of fish occurrence records for the entirety of the Rio Grande drainage in the US and Mexico; (2) improve that dataset by reformatting dates, synonymizing species names to a modern taxonomy, georeferencing localities, and flagging geographic outliers; (3) for those species with sufficient data for modeling, create species distribution models (SDMs); (4) use the environmental conditions determined via those models to project the species distributions into the future under two climate scenarios. To accomplish those objectives, we compiled 495,101 fish occurrence records mined from 122 original sources into a single database. We then, on the basis of text string searches of the original sources' verbatim locality fields, extracted 145,426 records that we judged to have a reasonable likelihood of being from the Rio Grande drainage. For those records we edited taxonomy, reformatted dates, and finally georeferenced 59,156 (41%) records, which proved sufficient for constructing SDMs for 36 species that met a priori quality assurance criteria. We provide basic interpretation of these models and discuss projections of them into several different future climate forecasts. Products include raw model outputs and symbolized maps helpful in interpretation and comparison, as well as raw data sets and recommendations regarding how all of these product might be used in future management and research efforts.Item Fishes of Texas and the Colorado River, with Special Attention to American Eel(2018-03-05) Hendrickson, Dean A.The Fishes of Texas Project is briefly described, selected species known from the Colorado River basin (Texas) are discussed, and the life cycle of the American Eel is outlined with special attention to the distribution and status of the species in Texas. Files here include the original PowerPoint, a PDF version of the slides only, and a PDF version of the slides and all notes covering most of what was presented orally at the Barstow Speaker Series of the Colorado River Alliance on March 5, 2018 in Austin, Texas (see https://coloradoriver.org/our-programs/barstow-speaker-series/)Item Fishes of Texas Project: Data Visualization and Analysis Tools(2020-01-22) Avila, Colton; Hendrickson, Dean A.; Cohen, Adam; Casarez, MelissaThe Fishes of Texas Project (FoTX) (http://fishesoftexas.org) database currently has 124,452 specimen-vouchered occurrence records spanning > 150 years with over 400,000 new records (including non-vouchered sources such as literature, anecdotal, and photo-based) in the process of being imported. Continual data growth prompted creation of new tools to dynamically assess (as the data evolve) the state of data coverage across various dimensions to increase user understanding and accessibility to the data and improve overall utility of the project. We produced species sampling curves, temporal species accumulation graphs, and heat maps of collecting event density over time and space for each river sub-basin within Texas. A QGIS plugin was also created to better assess the suspect status of incoming records. Each type of visualization has basic documentation, easily accessible statistical summaries, flexible queries, and exploration tools to help reveal variations in sampling density over both temporal and spatial dimensions. We highlight here the San Bernard River as an example of a notably under-sampled sub-basin (as indicated by diverse forms of evidence). With addition of future records, these dynamic tools will continue to illustrate taxonomic and spatial sampling deficiencies that in turn will help guide conservation planning.Item Introduction to The Freshwater Fishes of Texas(1998) Hubbs, ClarkItem Update on the Fishes of Texas Project(2017-03-04) Cohen, Adam; Hendrickson, Dean A.; Urban, Tomislav; Walling, David; Gentle, John; Garrett, Gary; Casarez, Melissa; Martin, F. DouglasThe Fishes of Texas project (www.fishesoftexas.org), originating in 2006, remains the most reliable (quality controlled) and data rich site for acquiring occurrence data for Texas fishes, holding over 124,000 records from 42 institutions. Among many discoveries, the project is responsible for detecting at least 3 freshwater species not previously known from the state. We continue making improvements, but substantial updates so far have been onerous for our developers for various reasons. A recent major update reduces coding redundancies, points the website to a new massively restructured and more fully normalized PostgreSQL database (was MySQL), and places the code in a versioning environment. These changes have little immediate effect on user experience, but will greatly accelerate development. PostgreSQL allows for complex spatial queries which will allow users to quickly map occurrence data alongside many more political/environmental layers than currently possible. While our database/web designers have been implementing these changes and fixing bugs etc., we’ve been preparing resources for them to integrate into the website. Some highlights to expect: 1 new updates to the state Species of Greatest Concern list; 2 expert opinion-determined nativity spatial layers for all freshwater fishes displaying in our new mapping system; 3 dynamic statistical summaries; 4 new data types from the literature (>14,900 records), citizen science (>4,300), anglers (>37,000), and agency databases (>1,000,000); 5 new museum records, many derived from our gap sampling (~19,000, 4 museums); 6 more specimen examinations (>400) and photographs (1000); 7 document archive with “smart” text search tools (currently in beta testing using TPWD fisheries reports). So be patient and keep your eyes open for updates.