A5088952270- Genetic diversity and population structure
- Ichthyology and Marine Biology
- Fish biology, ecology, and behavior
- Evolution and Paleontology Studies
- Fish Ecology and Management Studies
- Fish Biology and Ecology Studies
- Paleontology and Evolutionary Biology
- Identification and Quantification in Food
- Genomics and Phylogenetic Studies
- Parasite Biology and Host Interactions
- Amphibian and Reptile Biology
- Coral and Marine Ecosystems Studies
- Wildlife Ecology and Conservation
- Genetics, Bioinformatics, and Biomedical Research
- Marine animal studies overview
- Animal Behavior and Reproduction
- Species Distribution and Climate Change
- Physiological and biochemical adaptations
- Marine and fisheries research
- Morphological variations and asymmetry
- Aquatic Invertebrate Ecology and Behavior
- Chromosomal and Genetic Variations
- Polar Research and Ecology
- Marine Biology and Ecology Research
- Ecology and biodiversity studies
Yale University
2016-2025
Robert S. Peabody Museum of Archaeology
2019-2025
American Museum of Natural History
2016-2025
Yale Peabody Museum
2009-2025
Stamford Hospital
2025
Whitney Museum of American Art
2022-2024
Louisiana Department of Natural Resources
2024
Government Communications Headquarters
2022
University of Connecticut
2014-2017
University of California, Los Angeles
2014-2017
Ray-finned fishes make up half of all living vertebrate species. Nearly ray-finned are teleosts, which include most commercially important fish species, several model organisms for genomics and developmental biology, the dominant component marine freshwater faunas. Despite economic scientific importance fishes, lack a single comprehensive phylogeny with corresponding divergence-time estimates has limited our understanding evolution diversification this radiation. Our analyses, use multiple...
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...
Spiny-rayed fishes, or acanthomorphs, comprise nearly one-third of all living vertebrates. Despite their dominant role in aquatic ecosystems, the evolutionary history and tempo acanthomorph diversification is poorly understood. We investigate pattern lineage acanthomorphs by using a well-resolved time-calibrated phylogeny inferred from nuclear gene supermatrix that includes 520 species 37 fossil age constraints. This provides resolution for what has been classically referred to as “bush at...
The Southern Ocean around Antarctica is among the most rapidly warming regions on Earth, but has experienced episodic climate change during past 40 million years. It remains unclear how ancient periods of have shaped Antarctic biodiversity. origin antifreeze glycoproteins (AFGPs) in notothenioid fishes become a classic example evolution key innovation response to can drive adaptive radiation. By using time-calibrated molecular phylogeny notothenioids and reconstructed paleoclimate, we...
Dating the tree of life is a core endeavor in evolutionary biology.Rates evolution are fundamental to nearly every model and process.Rates need dates.There much debate on most appropriate reasonable ways which date life, recent work has highlighted some confusions complexities that can be avoided.Whether phylogenetic trees dated after they have been established, or as part process finding, practitioners know calibrations use.We emphasize importance identifying crown (not stem) fossils,...
The perciform group Labroidei includes approximately 2600 species and comprises some of the most diverse successful lineages teleost fishes. Composed four major clades, Cichlidae, Labridae (wrasses, parrotfishes, weed whitings), Pomacentridae (damselfishes), Embiotocidae (surfperches); labroids have been an icon for studies biodiversity, adaptive radiation, sexual selection. success diversification largely attributed to presence a innovation in pharyngeal jaw apparatus, pharyngognathy, which...
Classification of the tremendous diversity ray-finned fishes (Actinopterygii) began with designation taxonomic groups on basis morphological similarity. Starting in late 1960s phylogenetics became for classification Actinopterygii but failed to resolve many relationships, particularly among lineages within hyperdiverse Percomorpha. The introduction molecular led a dramatic reconfiguration actinopterygian phylogeny. Refined phylogenetic resolution afforded by studies revealed an uneven...
Highlights•The first legal test of the US Endangered Species Act concerned Snail Darter•The Darter is not a species but subpopulation Stargazing Darter•A reference-based approach can be used in delimiting any taxonomic group•Such comparative frameworks for taxa better guide conservation decisionsSummaryThe United States (ESA) 1973 set precedent biodiversity across globe.1 A key requirement protections afforded by ESA accurate delimitation imperiled species. We present to that integrates...
Although still controversial, estimation of divergence times using molecular data has emerged as a powerful tool to examine the tempo and mode evolutionary change. Two primary obstacles in improving accuracy dating are heterogeneity DNA substitution rates fossil record calibration points. Recent methodological advances have provided methods that estimate relative face nucleotide among lineages. However, relatively little attention focused on points allow one translate into absolute time. We...
Hybrid viability decreases with divergence time, a pattern consistent so-called speciation clock. However, the actual rate at which this clock ticks is poorly known. Most speciation-clock studies have used genetic as proxy for adopting molecular and often far-distant calibration points to convert distances into age. Because assumptions are violated most datasets distant calibrations of questionable utility, reproductive isolation evolves may be substantially different than current estimates...
Cichlid fishes are a key model system in the study of adaptive radiation, speciation and evolutionary developmental biology. More than 1600 cichlid species inhabit freshwater marginal marine environments across several southern landmasses. This distributional pattern, combined with parallels between phylogeny sequences Mesozoic continental rifting, has led to widely accepted hypothesis that cichlids an ancient group whose major biogeographic patterns arose from Gondwanan vicariance. Although...
Discussions aimed at resolution of the Tree Life are most often focused on interrelationships major organismal lineages. In this study, we focus some apical branches in through exploration phylogenetic relationships darters, a species-rich clade North American freshwater fishes. With near-complete taxon sampling close to 250 species, aim investigate strategies for efficient multilocus data and estimation divergence times using relaxed-clock methods when lacks fossil record. Our set comprises...
Estimates of species divergence times using DNA sequence data are playing an increasingly important role in studies evolution, ecology and biogeography. Most work has centred on obtaining appropriate kinds developing optimal estimation procedures, whereas somewhat less attention focused the calibration divergences fossils. Case with multiple fossil points provide opportunities to examine time problem new ways. We discuss two cross–validation procedures that address different aspects...
Proximity to an adaptive peak influences a lineage's potential diversify. We tested whether piscivory, high quality but functionally demanding trophic strategy, represents that limits morphological diversification in the teleost fish clade, Centrarchidae. synthesized published diet data and applied well-resolved, multilocus time-calibrated phylogeny reconstruct ancestral piscivory. measured functional features of skull performed principal components analysis on species' values for these...
Ecology Letters (2011) 14: 462–469 Abstract Although coral reefs are renowned biodiversity hotspots it is not known whether they also promote the evolution of exceptional ecomorphological diversity. We investigated this question by analysing a large functional morphological dataset trophic characters within Labridae, highly diverse group fishes. Using an analysis that accounts for species relationships, time available diversification and model uncertainty we show reef have evolved diversity...
A major challenge facing biodiversity conservation and management is that a significant portion of species diversity remains undiscovered or undescribed. This particularly evident in subterranean animals which delimitation based on morphology difficult because differentiation often obscured by phenotypic convergence. Multilocus genetic data constitute valuable source information for such organisms, but until recently, few methods were available to objectively test hypotheses using data....
Various nucleotide substitution models have been developed to accommodate among lineage rate heterogeneity, thereby relaxing the assumptions of strict molecular clock. Recently "uncorrelated relaxed clock" and "random local (RLC) allow decoupling rates between descendant lineages are thus predicted perform better in presence lineage-specific heterogeneity. However, it is uncertain how these punctuated shifts rate, especially closely related clades. Using cetaceans (whales dolphins) as a case...
Flatfish cranial asymmetry represents one of the most remarkable morphological innovations among vertebrates, and has fueled vigorous debate on manner rate at which strikingly divergent phenotypes evolve. A surprising result many recent molecular phylogenetic studies is lack support for flatfish monophyly, where increasingly larger DNA datasets up to 23 loci have either yielded a weakly supported clade or indicated group polyphyletic. Lack resolution relationships been attributed analytical...
Discordance among individual molecular age estimates, or between estimates and the fossil record, is observed in many clades across Tree of Life. This discordance attributed to a variety variables including calibration uncertainty, placement, nucleotide substitution rate heterogeneity, specified clock model. However, impact changes phylogenetic informativeness genes over time on inferences rarely analyzed. Using nuclear mitochondrial sequence data for ray-finned fishes (Actinopterygii) as an...
Abstract Background With more than 30,000 species, fish—including bony, jawless, and cartilaginous fish—are the largest vertebrate group, include some of earliest vertebrates. Despite their critical roles in many ecosystems human society, fish genomics lags behind work on birds mammals. This severely limits our understanding evolution hinders progress conservation sustainable utilization fish. Results Here, we announce Fish10K project, a portion Earth BioGenome Project aiming to sequence...