A5058953211- Genetic diversity and population structure
- Fish Ecology and Management Studies
- Genetic and phenotypic traits in livestock
- Genetic Mapping and Diversity in Plants and Animals
- Human Pose and Action Recognition
- Physiological and biochemical adaptations
- Fish Biology and Ecology Studies
- Genomics and Phylogenetic Studies
- Evolution and Genetic Dynamics
- Animal Behavior and Reproduction
- Reinforcement Learning in Robotics
- Advanced Vision and Imaging
- Chromosomal and Genetic Variations
- Robotic Locomotion and Control
- Ichthyology and Marine Biology
- Plant and animal studies
- Fish biology, ecology, and behavior
- Coral and Marine Ecosystems Studies
- Identification and Quantification in Food
- Communication in Education and Healthcare
- Biosensors and Analytical Detection
- Animal Genetics and Reproduction
- Genetics, Aging, and Longevity in Model Organisms
- Generative Adversarial Networks and Image Synthesis
- Robot Manipulation and Learning
Centro de Investigaciones Cientifícas de las Huastecas 'Aguazarca'
2020-2025
Stanford University
2020-2025
DeepMind (United Kingdom)
2023
Northeastern University
2015-2019
GEOMAR Helmholtz Centre for Ocean Research Kiel
2019
NOAA National Marine Fisheries Service Southwest Fisheries Science Center
2018
National Oceanic and Atmospheric Administration
2018
NOAA National Marine Fisheries Service
2018
Marine Biological Laboratory
2018
University of Edinburgh
2000
The evolution of reproductive barriers is the first step in formation new species and can help us understand diversification life on Earth. These often take form hybrid incompatibilities, which alleles derived from two different no longer interact properly hybrids
Genetic stock identification (GSI) estimates proportions and individual assignments through comparison of genetic markers with reference populations. It is used widely in anadromous fisheries to estimate the impact oceanic harvest on riverine Here, we provide a formal, explicit description Bayesian inference conditional GSI model, documenting an approach that has been last 5 years, but not formally described until now. Subsequently, describe novel cross-validation method permits accurate...
Abstract The evolution of reproductive barriers leads to the formation new species. However, recent research has demonstrated that hybridization been pervasive across tree life even in presence strong barriers. Using swordtail fishes (genus Xiphophorus ), an emerging model system, we document overlapping mechanisms act as gene flow between birchmanni and cortezi by combining genomic sequencing from natural hybrid populations, experimental laboratory crosses, behavioural assays, sperm...
We present a system for applying sim2real approaches to "in the wild" scenes with realistic visuals, and policies which rely on active perception using RGB cameras. Given short video of static scene collected generic phone, we learn scene's contact geometry function novel view synthesis Neural Radiance Field (NeRF). augment NeRF rendering by overlaying other dynamic objects (e.g. robot's own body, ball). A simulation is then created engine in physics simulator computes dynamics from...
Hybridization between species is widespread across the tree of life. As a result, many species, including our own, harbor regions their genome derived from hybridization. Despite recognition that this process widespread, we understand little about how stabilizes following hybridization, and whether mechanisms driving stabilization tend to be shared species. Here, dissect drivers variation in local ancestry replicated hybridization events two pairs swordtail fish: Xiphophorus birchmanni × X ....
Abstract How barriers to gene flow arise between closely related species is one of the oldest questions in evolutionary biology. Classic models biology predict that negative epistatic interactions variants genomes diverged lineages, known as hybrid incompatibilities, will reduce viability or fertility hybrids. The genetic architecture these and paths through which they have profound implications for efficacy incompatibilities species. While been studied using theoretical approaches several...
Abstract The evolution of reproductive barriers is the first step in formation new species and can help us understand diversification life on Earth. These often take form “hybrid incompatibilities,” where alleles derived from two different no longer interact properly hybrids. Theory predicts that hybrid incompatibilities may be more likely to arise at rapidly evolving genes involving multiple should common, but there has been sparse empirical data evaluate these predictions. Here, we...
One of the mechanisms that can lead to formation new species occurs through evolution reproductive barriers. However, recent research has demonstrated hybridization been pervasive across tree life even in presence strong Swordtail fishes (genus
We investigate the use of prior knowledge human and animal movement to learn reusable locomotion skills for real legged robots. Our approach builds upon previous work on imitating or dog Motion Capture (MoCap) data a skill module. Once learned, this module can be reused complex downstream tasks. Importantly, due imposed by MoCap data, our does not require extensive reward engineering produce sensible natural looking behavior at time reuse. This makes it easy create well-regularized,...
The brown ghost knifefish (Apteronotus leptorhynchus) is a weakly electric teleost fish of particular interest as versatile model system for variety research areas in neuroscience and biology. comprehensive information available on the neurophysiology neuroanatomy this organism has enabled significant advances such study neural basis behavior, development adult-born neurons central nervous their involvement regeneration tissue, well brain aging senescence. Despite substantial scientific...
Natural hybridization events provide unique windows into the barriers that keep species apart as well consequences of their breakdown. Here, we characterize hybrid populations formed between northern swordtail fish Xiphophorus cortezi and birchmanni from collection sites on two rivers. We use simulations new genetic reference panels to develop sensitive accurate local ancestry calling in this novel system. Strikingly, find both rivers consist genetically distinct subpopulations: a cluster...
Lifespan extension under low temperature is well conserved across both endothermic and exothermic taxa, but the mechanism underlying this change in aging poorly understood. Low thought to decrease metabolic rate, thus slowing accumulation of cellular damage from reactive oxygen species, although recent evidence suggests involvement specific cold-sensing biochemical pathways. We tested effect on 11 strains Brachionus rotifers, with hypothesis that if lifespan purely thermodynamic, all should...
Abstract Marine species tend to have extensive distributions, which are commonly attributed the dispersal potential provided by planktonic larvae and rarity of absolute barriers in ocean. Under this paradigm, occurrence marine microendemism without geographic isolation with poses a dilemma. The recently described Maya hamlet ( Hypoplectrus maya , Serranidae) is exactly such case, being endemic 50‐km segment Mesoamerican Barrier Reef System (MBRS). We use whole‐genome analysis infer...
Abstract Over the past two decades researchers have documented extent of natural hybridization between closely related species using genomic tools. Many across tree life show evidence with their evolutionary relatives. In some cases, this is complex—involving gene flow more than species. While common over timescales, proposed that it may be even in contemporary populations where anthropogenic disturbance has modified a myriad aspects environments which organisms live and reproduce. Here, we...
Summary How phenotypic diversity originates and persists within populations are classic puzzles in evolutionary biology. While polymorphisms hypothesized to be under balancing selection segregate many species, it remains rare for the genetic basis selective forces both known same trait, leading an incomplete understanding of classes polymorphisms. Here, we uncover architecture a balanced sexual mimicry polymorphism identify behavioral mechanisms that may involved its maintenance swordtail...
Background: Several studies have questioned the reliability of interview process in predicting resident success. Objective: Statistical analysis structure might guide improvements and increase validity selection methodologyMethod: We performed a prospective comparative our general surgery residency over two consecutive academic years (AY 2022 2023). used descriptive statistics as well mixed effects ordered logit model to measure bias improvement. Results: Eighty total students were...
Abstract Natural hybridization events provide unique windows into the barriers that keep species apart as well consequences of their breakdown. Here we characterize hybrid populations formed between northern swordtail fish Xiphophorus cortezi and X. birchmanni from collection sites on two rivers. We develop sensitive accurate local ancestry calling for this system based low coverage whole genome sequencing. Strikingly, find both rivers consist genetically distinct subpopulations: a cluster...
Replaying data is a principal mechanism underlying the stability and efficiency of off-policy reinforcement learning (RL). We present an effective yet simple framework to extend use replays across multiple experiments, minimally adapting RL workflow for sizeable improvements in controller performance research iteration times. At its core, Replay Across Experiments (RaE) involves reusing experience from previous experiments improve exploration bootstrap while reducing required changes minimum...
Abstract Over the past two decades researchers have documented extent of natural hybridization between closely related species using genomic tools. Many across tree life show evidence with their evolutionary relatives. In some cases, this is complex – involving gene flow more than species. While common over timescales, proposed that it may be even in contemporary populations where anthropogenic disturbance has modified myriad aspects environments which organisms live and reproduce. Here, we...