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1. Evolution of many-body systems under ancilla quantum measurements

   https://doi.org/10.1103/PhysRevB.107.214203  

   Doggen, Elmer V. ; Gefen, Yuval ; Gornyi, Igor V. ; Mirlin, Alexander D. ; Polyakov, Dmitry G. ( June 2023 , Physical Review B)
2. Interspecific Variation of Calcaneal Morphology in Gorillas

   Harper, Christine M. ; Ruff, Christopher B. ; Sylvester, Adam D. ( February 2019 , American journal of physical anthropology)

   The foot plays a prominent role in weight-bearing suggesting it may reflect locomotor variation. Despite the immense amount of foot research, the calcaneus has been relatively understudied. Here we analyzed the entire calcaneal shape of Gorilla gorilla gorilla (n=41), Gorilla beringei graueri (n=17) and Gorilla beringei beringei (n=8) to understand how morphology relates to locomotor behavior. Calcanei were surface scanned and external shape analyzed using a three-dimensional geometric morphometric sliding semilandmark analysis. Semilandmarks were slid to minimize the bending energy of the thin plate spline interpolation function relative to the updated Procrustes average. Generalized Procrustes Analysis was used to align landmark configurations and shape variation was summarized using a principal components analysis. Procrustes distances between species were calculated and resampling statistics were run to test for group differences. All subspecies demonstrate statistically different morphologies (p<0.005 for pairwise comparisons). G. b. graueri separates from other subspecies based on posterolateral morphology, with G. b. graueri demonstrating an elongated peroneal trochlea, and thus more bone superiorly than G. g. gorilla. Compared to G. b. beringei, G. b. graueri has less bone inferiorly near the tuberosity. Cuboid and posterior talar facet shapes correlate with arboreality. G. b. beringei (most terrestrial) has a flatter cuboid facet and a more transversely oriented/relatively smaller posterior talar facet than G. g. gorilla (most arboreal) and G. b. graueri represents an intermediate morphology. These differences demonstrate a relationship between calcaneal shape and locomotor behavior and suggest that G. b. graueri may load its foot differently from the other subspecies. This project was supported by NSF grant # BCS - 1824630. 

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3. Comparative life history patterns of female gorillas

   https://doi.org/10.1002/ajpa.24792  

   Robbins, Martha M. ; Akantorana, Moses ; Arinaitwe, Joseph ; Breuer, Thomas ; Manguette, Marie ; McFarlin, Shannon ; Meder, Angela ; Parnell, Richard ; Richardson, Jack L. ; Stephan, Claudia ; et al ( June 2023 , American Journal of Biological Anthropology)

   Several theories have been proposed to explain the impact of ecological conditions on differences in life history variables within and between species. Here we compare female life history parameters of one western lowland gorilla population(Gorilla gorilla gorilla) and two mountain gorilla populations(Gorilla beringei beringei).

   We compared the age of natal dispersal, age of first birth, interbirth interval, and birth rates using long‐term demographic datasets from Mbeli Bai (western gorillas), Bwindi Impenetrable National Park and the Virunga Massif (mountain gorillas).

   The Mbeli western gorillas had the latest age at first birth, longest interbirth interval, and slowest surviving birth rate compared to the Virunga mountain gorillas. Bwindi mountain gorillas were intermediate in their life history patterns.

   These patterns are consistent with differences in feeding ecology across sites. However, it is not possible to determine the evolutionary mechanisms responsible for these differences, whether a consequence of genetic adaptation to fluctuating food supplies (“ecological risk aversion hypothesis”) or phenotypic plasticity in response to the abundance of food (“energy balance hypothesis”). Our results do not seem consistent with the extrinsic mortality risks at each site, but current conditions for mountain gorillas are unlikely to match their evolutionary history. Not all traits fell along the expected fast‐slow continuum, which illustrates that they can vary independently from each other (“modularity model”). Thus, the life history traits of each gorilla population may reflect a complex interplay of multiple ecological influences that are operating through both genetic adaptations and phenotypic plasticity.

    

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4. Many-Body Chern Number from Statistical Correlations of Randomized Measurements

   https://doi.org/10.1103/PhysRevLett.126.050501  

   Cian, Ze-Pei ; Dehghani, Hossein ; Elben, Andreas ; Vermersch, Benoît ; Zhu, Guanyu ; Barkeshli, Maissam ; Zoller, Peter ; Hafezi, Mohammad ( February 2021 , Physical Review Letters)

   null (Ed.)
5. Spatial representation of magnitude in gorillas and orangutans

   https://doi.org/10.1016/j.cognition.2017.07.010  

   Gazes, Regina Paxton ; Diamond, Rachel F.L. ; Hope, Jasmine M. ; Caillaud, Damien ; Stoinski, Tara S. ; Hampton, Robert R. ( November 2017 , Cognition)