A5070979744- Fish biology, ecology, and behavior
- Fish Biology and Ecology Studies
- Ichthyology and Marine Biology
- Fish Ecology and Management Studies
- Genetic diversity and population structure
- Evolution and Paleontology Studies
- Genomics and Phylogenetic Studies
- Identification and Quantification in Food
- Morphological variations and asymmetry
- Species Distribution and Climate Change
- Aquatic Ecosystems and Biodiversity
- Genetics, Bioinformatics, and Biomedical Research
- Environmental DNA in Biodiversity Studies
- Marine and fisheries research
- Paleontology and Evolutionary Biology
- Genetic and phenotypic traits in livestock
- Evolution and Genetic Dynamics
- Microplastics and Plastic Pollution
- Marine animal studies overview
- Wildlife Ecology and Conservation
- Animal Behavior and Reproduction
- Biomedical Text Mining and Ontologies
- Aortic aneurysm repair treatments
- Archaeology and Natural History
- Anatomy and Medical Technology
National Museum of Natural History
2008-2025
Tulane University
2025
Oregon Department of Fish and Wildlife
2015-2024
Oregon State University
2015-2024
Smithsonian Institution
2008-2022
Ecological Society of America
2020
National Evolutionary Synthesis Center
2008-2015
Louisiana Department of Wildlife and Fisheries
2012-2014
Field Museum of Natural History
2008
Duke University
2007-2008
George Gaylord Simpson famously postulated that much of life's diversity originated as adaptive radiations—more or less simultaneous divergences numerous lines from a single ancestral type. However, identifying radiations has proven difficult due to lack broad-scale comparative datasets. Here, we use phylogenetic data on body size and shape in animal clades test key model radiation, which initially rapid morphological evolution is followed by relative stasis. We compared the fit this both...
Understanding how and why certain clades diversify greatly in morphology whereas others do not remains a major theme evolutionary biology. Projecting families of phylogenies into multivariate morphospaces can distinguish two scenarios potentially leading to unequal morphological diversification: magnitude change per phylogenetic branch, efficiency innovation. This approach is demonstrated using case study skulls sister within the South American fish superfamily Anostomoidea. Unequal...
We contrast 2D vs. 3D landmark-based geometric morphometrics in the fish subfamily Oligocottinae by using landmarks from CT-generated models and comparing morphospace of to one based on images. The shape variables capture common patterns across taxa, such that pairwise Procrustes distances among taxa correspond trends captured principal component analysis are similar xy plane. use two sets test several ecomorphological hypotheses literature. Both data reject hypothesis head correlates...
Abstract The Neotropics harbor the most species-rich freshwater fish fauna on planet, but timing of that exceptional diversification remains unclear. Did accumulate species steadily throughout their long history, or attain remarkable diversity recently? Biologists have debated relative support for these museum and cradle hypotheses, few phylogenies megadiverse tropical clades included sufficient taxa to distinguish between them. We used 1288 ultraconserved element loci spanning 293 species,...
To achieve maximum efficacy, taxonomic studies that seek to distinguish amongst species must first account for allometric shape variation within species. Two recently developed software packages (SMATR and MorphoJ) offer regression-based approaches are notable their statistical power ease of use may prove highly useful taxonomists working with linear or geometric morphometric data. We investigate delimitation the slender-bodied fishes in Leporinus cylindriformis group using these programs...
Innovations in locomotor morphology have been invoked as important drivers of vertebrate diversification, although the influence novel locomotion strategies on marine fish diversification remains largely unexplored. Using triggerfish a case study, we determine whether evolution distinctive synchronization enlarged dorsal and anal fins that use to swim may catalyzed ecological group. By adopting comparative phylogenetic approach quantify median fin body shape integration assess tempo...
The characiform fishes of the Neotropics and Africa radiated remarkably in ecomorphology, but macroevolutionary processes responsible for their biodiversity remain unexplored, degree to which continental diversification parallels classic adaptive radiations remains untested. We reconstruct using a new fossil-calibrated molecular phylogeny, dietary information, geometric morphometrics. Though body shape diversified early manner consistent with an ancient radiation, trophic shifts did not...
Synopsis The decreasing cost of acquiring computed tomographic (CT) data has fueled a global effort to digitize the anatomy museum specimens. This produced wealth open access digital three-dimensional (3D) models available anyone with Internet. potential applications these are broad, ranging from 3D printing for purely educational purposes development highly advanced biomechanical anatomical structures. However, while virtually can data, relatively few have training easily derive desirable...
Analysis of a morphological dataset containing 152 parsimony-informative characters yielded the first phylogenetic reconstruction spanning South American characiform family Anostomidae. The included 46 ingroup species representing all anostomid genera and subgenera. Outgroup comparisons members sister group to Anostomidae (the Chilodontidae) as well families Curimatidae, Characidae, Citharinidae, Distichodontidae, Hemiodontidae, Parodontidae Prochilodontidae. results supported clade...
Species detection using eDNA is revolutionizing global capacity to monitor biodiversity. However, the lack of regional, vouchered, genomic sequence information-especially information that includes intraspecific variation-creates a bottleneck for management agencies wanting harness complete power taxa and implement analyses. studies depend upon regional databases mitogenomic evaluate effectiveness such data detect identify taxa. We created Oregon Biodiversity Genome Project create database...
Abstract Phylogenetic reconstruction of the Neotropical freshwater fish family Anostomidae using multilocus sequence data from 97 species supports recognition three subfamilies: Leporellinae with one genus, Anostominae six genera, and Leporininae nine genera. We reassign many Leporinus to a redefined Hypomasticus allocate striatus new monotypic genus sister Abramites Megaleporinus. These taxonomic changes clarify that section anostomid tree partially solve longstanding non-monophyly...
Synthetic science promises an unparalleled ability to find new meaning in old data, extant results, or previously unconnected methods and concepts, but pursuing synthesis can be a difficult risky endeavor. Our experience as biologists, informaticians, educators at the National Evolutionary Synthesis Center has affirmed that yield major insights, also revealed technological hurdles, prevailing academic culture, general confusion about nature of hamper its progress. By presenting our view what...
Abstract In theory, evolutionary modularity allows anatomical structures to respond differently selective regimes, thus promoting morphological diversification. These differences can then influence the rate and direction of phenotypic evolution among structures. Here we use geometric morphometrics matrix statistics compare rates craniofacial estimate evolvability in face braincase modules a clade teleost fishes (Gymnotiformes) mammals (Carnivora), both which exhibit substantial diversity. We...
Scientists rarely reuse expert knowledge of phylogeny, in spite years ofeffort to assemble a great "Tree Life" (ToL). A notableexception involves the use Phylomatic, which provides tools togenerate custom phylogenies from large, pre-computed, phylogeny ofplant taxa. This suggests potential for more generalized systemthat, starting with query consisting list any known species, wouldrectify non-standard names, identify containing theimplicated taxa, prune away unneeded parts, and supply branch...
Target enrichment of conserved nuclear loci has helped reconstruct evolutionary relationships among a wide variety species. While there are preexisting bait sets to enrich few hundred across all fishes or thousand from acanthomorph fishes, no set exists large numbers (>1,000 loci) ultraconserved ostariophysans, the second largest actinopterygian superorder. In this study, we describe how designed 2,708 ostariophysan by combining an existing genome assembly with low coverage sequence data...
AbstractInvasions of freshwater habitats by marine fishes provide exceptional cases habitat-driven biological diversification. Freshwater make up less than 1% aquatic but contain ∼50% fish species. However, while the dominant group (Otophysi) is older that most (Percomorphaceae), it morphologically diverse. Classically, scientists have invoked differences in tempo and/or mode evolution to explain such unequal morphological We tested for evidence these phenomena superfamily Cottoidea...
This study develops the random phylogenies rate test (RAPRATE), a likelihood method that simulates morphological evolution along randomly generated phylogenies, and uses it to determine whether considerable difference in diversity between two sister clades of South American fishes should be taken as evidence differing rates change or lineage turnover. Despite identical ages origin, similar species richness, sympatric geographic distributions, ecological superfamily Anostomoidea exceeds...
ABSTRACT Studies on the diversity, taxonomy, phylogeny, and biogeography of Neotropical Fishes have thrived over twenty years that elapsed since first symposium their phylogeny classification in Porto Alegre, Brazil. Here, we review recent advances study fishes assess known diversity freshwater species region. 6,255 valid been discovered Neotropics so far, estimate 9,000 will be when inventory is complete. We also summarize events second Symposium Phylogeny Classification took place last...
The diverse predatory rockfishes (Sebastes spp.) support extensive commercial fisheries in the northeastern Pacific.Although 106 species of Sebastes are considered valid, many ecological, geographical, and morphological boundaries separating them lack clarity.We clarify one such boundary by blue rockfish mystinus (Jordan Gilbert, 1881) into 2 on basis molecular data.We redescribe S. mystinus, designate a lectotype, describe deacon rockfish, diaconus n. sp.Aside from its unambiguous...