9 Works

Validating marker-less pose estimation with 3D x-ray radiography

Dalton Moore, Jeffrey Walker, Jason MacLean & Nicholas Hatsopoulos
These data were generated to evaluate the accuracy of DeepLabCut (DLC), a deep learning marker-less motion capture approach, by comparing it to a 3D x-ray video radiography system that tracks markers placed under the skin (XROMM). We recorded behavioral data simultaneously with XROMM and RGB video as marmosets foraged and reconstructed three-dimensional kinematics in a common coordinate system. We used XMALab to track 11 XROMM markers, and we used the toolkit Anipose to filter and...

Data and code from: The functional form of specialized predation affects whether Janzen-Connell effects can prevent competitive exclusion

Daniel Smith
Janzen-Connell Effects (JCEs), specialized predation of seeds and seedlings near conspecific trees, are hypothesized to maintain species richness. While previous studies show JCEs can maintain high richness relative to neutral communities, recent theoretical work indicates JCEs may weakly inhibit competitive exclusion when species exhibit inter-specific fitness variation. However, recent models make somewhat restrictive assumptions about the functional form of specialized predation -- that JCEs occur at a fixed rate when offspring are within a fixed...

Morphological measurements in a coastal Ecuadorian avifauna

Abhimanyu Lele, Holly Garrod, Euan Ferguson, Carmen Azahara Prieto Gil & Mike Ellis
This dataset contains measurement of six morphological variables in 3444 individual birds. These birds were captured using mist-nets in the Reserva Jama-Coaque, operated by the Third Millennium Alliance, Manabí, Ecuador (0° 6’ 57.75” S, 80° 7’ 28.20” W) Data were collected in 2018 and 2019. The variables included here are unflattened wing chord, length of longest retrix, bill length from nares to tip, bill width at nares, bill depth at nares, and weight, as described...

5-G MD Simulations

Jared C. Lewis, Benoit Roux, Ying Li & David Upp

mRNA editing analysis of Doryteuthis pealeii

Sofia Medina Ruiz, Caroline Albertin, Therese Mitros, Hannah Schmidbaur, Gustavo Sanchez, Z.Y. Wang, Jane Grimwood, Joshua Rosenthal, Clifton Ragsdale, Oleg Simakov & Daniel Rokhsar
Cephalopods are known for their large nervous systems, complex behaviors and morphological innovations. To investigate the genomic underpinnings of these features, we assembled the chromosomes of the Boston market squid Doryteuthis (Loligo) pealeii and the California two-spot octopus, Octopus bimaculoides, and compared them with those of the Hawaiian bobtail squid, Euprymna scolopes. The genomes of the soft-bodied (coleoid) cephalopods are highly rearranged relative to other extant molluscs, indicating an intense, early burst of genome restructuring....

Climatic refugia and reduced extinction correlate with underdispersion in mammals and birds in Africa

Jacob C. Cooper, Nicholas M. A. Crouch, Adam W. Ferguson & John M. Bates
Macroevolutionary patterns, often inferred from metrics of community relatedness, are often used to ascertain major evolutionary processes shaping communities. These patterns have been shown to be informative of biogeographic barriers, of habitat suitability and invasibility (especially with regards to environmental filtering), and of regions that function as evolutionary cradles (i.e., sources of diversification) or museums (i.e., regions of reduced extinction). Here, we analysed continental datasets of mammal and bird distributions to identify primary drivers of...

Rapid evolutionary divergence of a songbird population following recent colonization of an urban area

Guillermo Friis, Jonathan Atwell, Adam Fudickar, Timothy Greives, Pamela Yeh, Trevor Price, Ellen Ketterson & Borja Milá
Colonization of a novel environment by a small group of individuals can lead to rapid evolutionary change, yet evidence of the relative contributions of neutral and selective factors in promoting divergence during the early stages of colonization remain scarce. Here, we use genome-wide SNP data to test the role of neutral and selective forces in driving the divergence of a unique urban population of the Oregon junco (Junco hyemalis oreganus), which became established on the...

The functional diversity of marsupial limbs is influenced by both ecology and developmental constraint

Spencer Pevsner, David Grossnickle & Zhe-Xi Luo
Extant marsupials are less ecologically diverse than placentals, and this is reflected by placentals exhibiting a greater diversity of locomotor modes, including powered flight and fully aquatic swimming. One proposed explanation for this discrepancy is that the development of more disparate marsupial forelimbs is prevented by the neonate’s crawl to the pouch, which requires precocious forelimb development for climbing adaptations. To test predictions of this Developmental Constraint Hypothesis, we pursue a comparative morphometric study on...

The causes and ecological context of rapid morphological evolution in birds

Nicholas Crouch & Joseph Tobias
Episodic pulses in morphological diversification are a prominent feature of evolutionary history, driven by factors that remain widely disputed. Resolving this question has proved challenging because comprehensive species-level data are generally unavailable at sufficient scale. Combining global phylogenetic and morphological data for birds, we show that pulses of diversification in lineages and traits tend to occur independently and in different contexts. Speciation pulses are preceded by greater differentiation in overall morphology and habitat niche, then...

Registration Year

  • 2022
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Affiliations

  • University of Chicago
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  • Indiana University
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  • University of Kansas
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  • University of Washington
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  • New York University Abu Dhabi
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  • Field Museum of Natural History
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  • University of California, Berkeley
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  • Spanish National Research Council
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  • University of Vienna
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  • Hiroshima University
    1