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  • American Physical Society  (198.842)
  • University of Chicago Press
  • 2015-2019  (98.923)
  • 2010-2014  (98.583)
  • 1935-1939  (4.081)
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  • 1
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    Construction and composition of the squid pen from Doryteuthis pealeii (2019)
    University of Chicago Press
    Details
    Publikationsdatum: 2022-05-26
    Beschreibung: Author Posting. © University of Chicago Press, 2019. This article is posted here by permission of University of Chicago Press for personal use, not for redistribution. The definitive version was published in Messerli, M. A., Raihan, M. J., Kobylkevich, B. M., Benson, A. C., Bruening, K. S., Shribak, M., Rosenthal, J. J. C., & Sohn, J. J. Construction and composition of the squid pen from Doryteuthis pealeii. Biological Bulletin. 237(1), (2019): 1-15, doi:10.1086/704209.
    Beschreibung: The pen, or gladius, of the squid is an internalized shell. It serves as a site of attachment for important muscle groups and as a protective barrier for the visceral organs. The pen’s durability and flexibility are derived from its unique composition of chitin and protein. We report the characterization of the structure, development, and composition of pens from Doryteuthis pealeii. The nanofibrils of the polysaccharide β-chitin are arranged in an aligned configuration in only specific regions of the pen. Chitin is secreted early in development, enabling us to characterize the changes in pen morphology prior to hatching. The chitin and proteins are assembled in the shell sac surrounded by fluid that has a significantly different ionic composition from squid plasma. Two groups of proteins are associated with the pen: those on its surface and those embedded within the pen. Only 20 proteins are identified as embedded within the pen. Embedded proteins are classified into six groups, including chitin associated, protease, protease inhibitors, intracellular, extracellular matrix, and those that are unknown. The pen proteins share many conserved domains with proteins from other chitinous structures. We conclude that the pen is one of the least complex, load-bearing, chitin-rich structures currently known and is amenable to further studies to elucidate natural construction mechanisms using chitin and protein.
    Beschreibung: We thank John Dowling for financial support. We thank Kasia Hammar and Louie Kerr of the Marine Biological Laboratory Central Microscopy Facility for help obtaining scanning electron micrographs. We thank Bogdan Budnik and Renee Robinson from the Mass Spectrometry and Proteomics Resource Laboratory for their help and advice with protein identification. We thank Shin-Yi Marzano and Chenchen Feng of South Dakota State University for help with rapid amplification of cDNA ends. Funding for this work was provided by the Eugene and Millicent Bell Fellowship Fund in Tissue Engineering (MAM), an Agriculture and Biological Sciences Undergraduate Research Award (KSB), National Institutes of Health grant R01 GM101701 (MS), National Science Foundation grant IOS1557748 (JJCR), and Israel-United States Binational Science Foundation 2013094 (JJCR). Literature Cited
    Beschreibung: 2020-07-08
    Repository-Name: Woods Hole Open Access Server
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  • 2
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    Shifting vital rate correlations alter predicted population responses to increasingly variable environments (2019)
    University of Chicago Press
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    Publikationsdatum: 2022-05-26
    Beschreibung: Author Posting. © University of Chicago Press , 2019. This article is posted here by permission of University of Chicago Press for personal use, not for redistribution. The definitive version was published in Iles, D. T., Rockwell, R. F., & Koons, D. N. Shifting vital rate correlations alter predicted population responses to increasingly variable environments. American Naturalist, 193(3), (2019): E57-E64. , doi:10.1086/701043.
    Beschreibung: Time series of vital rates are often used to construct “environment-blind” stochastic population projections and calculate the elasticity of population growth to increased temporal variance in vital rates. Here, we show that the utility of this widely used demographic tool is greatly limited by shifts in vital rate correlations that occur as environmental drivers become increasingly variable. The direction and magnitude of these shifts are unpredictable without environmentally explicit models. Shifting vital rate correlations had the largest fitness effects on life histories with short to medium generation times, potentially hampering comparative analyses based on elasticities to vital rate variance for a wide range of species. Shifts in vital rate correlations are likely ubiquitous in increasingly variable environments, and further research should empirically evaluate the life histories for which detailed mechanistic relationships between vital rates and environmental drivers are required for making reliable predictions versus those for which summarized demographic data are sufficient.
    Beschreibung: D.T.I. received support from Ducks Unlimited Canada, the S. J. and Jesse E. Quinney Foundation, Utah State University, the Frank M. Chapman Memorial Fund, and California Waterfowl. D.N.K. is supported by a James C. Kennedy Endowed Chair of Wetland and Waterfowl Conservation. We thank the editors and anonymous reviewers whose insightful comments greatly improved our study.
    Beschreibung: 2020-01-07
    Schlagwort(e): covariation ; elasticity ; demography ; fitness ; life history ; stochasticity
    Repository-Name: Woods Hole Open Access Server
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  • 3
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    Computational history of knowledge: Challenges and opportunities (2019)
    University of Chicago Press
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    Publikationsdatum: 2022-05-26
    Beschreibung: Author Posting. © University of Chicago Press, 2019. This article is posted here by permission of University of Chicago Press for personal use, not for redistribution. The definitive version was published in Laubichler, M. D., Maienschein, J., & Renn, J. Computational history of knowledge: Challenges and opportunities. Isis, 110(3), (2019): 502-512, doi: 10.1086/705544.
    Beschreibung: So far, the twenty-first century has been defined by an ever-increasing availability of digital data and substantial advances in computational methods. Taken together, these developments have already affected all aspects of our lives, including the ways research in the sciences and the humanities is conducted. This computational turn is often viewed with unease. But as this essay argues, it also offers exciting new perspectives for the history of knowledge. Rather than fighting these trends, the essay suggests, by embracing new possibilities and actively participating in the development of new computational methodologies the history of knowledge can act as a bridge between the world of the humanities, with its tradition of close reading and detailed understanding of individual cases, and the world of big data and computational analysis. We can gain novel perspectives on the evolution of knowledge that are both detailed and broad.
    Beschreibung: 2020-09-01
    Repository-Name: Woods Hole Open Access Server
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  • 4
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    Hypoxia has a lasting effect on fast-startle behavior of the tropical fish Haemulon plumieri (2019)
    University of Chicago Press
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    Publikationsdatum: 2022-05-26
    Beschreibung: Author Posting. © University of Chicago, 2019. This article is posted here by permission of University of Chicago for personal use, not for redistribution. The definitive version was published in Biological Bulletin 237(1), (2019): 48-62, doi:10.1086/704337.
    Beschreibung: Anthropogenic activities and climate change have resulted in an increase of hypoxic conditions in nearshore ecosystems worldwide. Depending on the persistence of a hypoxic event, the survival of aquatic animals can be compromised. Temperate fish exposed to hypoxia display a reduction in the probability of eliciting startle responses thought to be important for escape from predation. Here we examine the effect of hypoxia on the probability of eliciting fast-startle responses (fast-starts) of a tropical fish, the white grunt (Haemulon plumieri), and whether hypoxia has a prolonged impact on behavior once the fish are returned to normoxic conditions. White grunts collected from the San Juan Bay Estuary in Puerto Rico were exposed to an oxygen concentration of 2.5 mg L−1 (40% dissolved oxygen). We found a significant reduction in auditory-evoked fast-starts that lasted for at least 24 hours after fish were returned to normoxic conditions. Accessibility to the neuronal networks that underlie startle responses was an important motivator for this study. Mauthner cells are identifiable neurons found in most fish and amphibians, and these cells are known to initiate fast-starts in teleost fishes. The assumption that most of the short-latency responses in this study are Mauthner cell initiated provided the impetus to characterize the white grunt Mauthner cell. The identification of the cell provides a first step in understanding how low oxygen levels may impact a single cell and its circuit and the behavior it initiates.
    Beschreibung: Steve Treistman and the Institute of Neurobiology in Old San Juan, Puerto Rico, kindly hosted SJZ, and Dr. Cristina Velazquez and Dr. Hector Marrero provided essential assistance in the laboratory. We thank Kamran Khodakhah for reading an earlier version of this manuscript and Frank P. Elsen, Electrophysiology Application Scientist of Harvard Bioscience, for his kind help. We also thank undergraduate students at the University of Puerto Rico for their help in the collection and care of fish. This research was supported by Williams College, the Puerto Rico Center for Environmental Neuroscience, and a National Science Foundation Centers of Research Excellence in Science and Technology grant (HRD-1137725).
    Beschreibung: 2020-07-16
    Repository-Name: Woods Hole Open Access Server
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  • 5
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    Introduction (2019)
    University of Chicago Press
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    Publikationsdatum: 2022-05-26
    Beschreibung: Author Posting. © University of Chicago Press, 2019. This article is posted here by permission of University of Chicago Press for personal use, not for redistribution. The definitive version was published in Gibson, A., Laubichler, M. D., & Maienschein, J. Introduction. Isis, 110(3), (2019): 497-501, doi: 10.1086/705542.
    Beschreibung: Digital technologies have transformed both the historical record and the historical profession. This Focus section examines how computational methods have influenced, and will influence, the history of science. The essays discuss the new types of questions and narratives that computational methods enable and the need for better data management in the history and philosophy of science (HPS) community. They showcase various methodological approaches, including textual and network analyses, and they place the computational turn in historiographical and societal context. Rather than surrendering to either technophilia or technophobia, the essays articulate both the benefits and the drawbacks of computational HPS. They agree that the future of the field depends on the successful integration of technological developments, social practices, and infrastructural support and that historians of science must learn to embrace collaboration both within and beyond disciplinary boundaries.
    Beschreibung: 2020-09-01
    Repository-Name: Woods Hole Open Access Server
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  • 6
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    Reduced swimming performance repeatedly evolves on loss of migration in landlocked populations of alewife (2018)
    University of Chicago Press
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    Publikationsdatum: 2022-05-26
    Beschreibung: Author Posting. © University of Chicago, 2018. This article is posted here by permission of University of Chicago Press for personal use, not for redistribution. The definitive version was published in Physiological and Biochemical Zoology 91 (2018):814–825, doi:10.1086/696877.
    Beschreibung: Whole-organism performance tasks are accomplished by the integration of morphological traits and physiological functions. Understanding how evolutionary change in morphology and physiology influences whole-organism performance will yield insight into the factors that shape its own evolution. We demonstrate that nonmigratory populations of alewife (Alosa pseudoharengus) have evolved reduced swimming performance in parallel, compared with their migratory ancestor. In contrast to theoretically and empirically based predictions, poor swimming among nonmigratory populations is unrelated to the evolution of osmoregulation and occurs despite the fact that nonmigratory alewives have a more fusiform (torpedo-like) body shape than their ancestor. Our results suggest that elimination of long-distance migration from the life cycle has shaped performance more than changes in body shape and physiological regulatory capacity.
    Beschreibung: Funding was provided by the University of Connecticut’s Department of Ecology and Evolutionary Biology and El Muy Viejo.
    Beschreibung: 2019-01-30
    Repository-Name: Woods Hole Open Access Server
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  • 7
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    The evolution of marine larval dispersal kernels in spatially structured habitats: Analytical models, individual-based simulations, and comparisons with empirical estimates. (2019)
    University of Chicago Press
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    Publikationsdatum: 2022-05-26
    Beschreibung: Author Posting. © University of Chicago Press, 2019. This article is posted here by permission of University of Chicago Press for personal use, not for redistribution. The definitive version was published in Shaw, A. K., D'Aloia, C. C., & Buston, P. M. The evolution of marine larval dispersal kernels in spatially structured habitats: Analytical models, individual-based simulations, and comparisons with empirical estimates. American Naturalist, 193(3), (2019):424-435, doi:10.1086/701667.
    Beschreibung: Understanding the causes of larval dispersal is a major goal of marine ecology, yet most research focuses on proximate causes. Here we ask how ultimate, evolutionary causes affect dispersal. Building on Hamilton and May’s classic 1977 article “Dispersal in Stable Habitats,” we develop analytic and simulation models for the evolution of dispersal kernels in spatially structured habitats. First, we investigate dispersal in a world without edges and find that most offspring disperse as far as possible, opposite the pattern of empirical data. Adding edges to our model world leads to nearly all offspring dispersing short distances, again a mismatch with empirical data. Adding resource heterogeneity improves our results: most offspring disperse short distances with some dispersing longer distances. Finally, we simulate dispersal evolution in a real seascape in Belize and find that the simulated dispersal kernel and an empirical dispersal kernel from that seascape both have the same shape, with a high level of short-distance dispersal and a low level of long-distance dispersal. The novel contributions of this work are to provide a spatially explicit analytic extension of Hamilton and May’s 1977 work, to demonstrate that our spatially explicit simulations and analytic models provide equivalent results, and to use simulation approaches to investigate the evolution of dispersal kernel shape in spatially complex habitats. Our model could be modified in various ways to investigate dispersal evolution in other species and seascapes, providing new insights into patterns of marine larval dispersal.
    Beschreibung: We thank S. Levin, M. Neubert, S. Proulx, L. Sullivan, R. Warner, and several anonymous reviewers for helpful comments. This work was carried out in part using computing resources at the University of Minnesota Supercomputing Institute. The project was supported by a start-up award from the University of Minnesota to A.K.S. and a National Science Foundation award (OCE-1260424) to P.M.B. and colleagues; C.C.D. was supported by the Weston Howland Junior Postdoctoral Scholarship from the Woods Hole Oceanographic Institution.
    Beschreibung: 2020-01-17
    Schlagwort(e): biological oceanography ; dispersal kernel ; evolutionarily stable strategy ; larval dispersal ; marine ecology ; population connectivity
    Repository-Name: Woods Hole Open Access Server
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  • 8
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    Seasonal and daily patterns of the mating calls of the oyster toadfish, Opsanus tau. (2019)
    University of Chicago Press
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    Publikationsdatum: 2022-05-26
    Beschreibung: Author Posting. © University of Chicago Press, 2019. This article is posted here by permission of [publisher] for personal use, not for redistribution. The definitive version was published in Van Wert, J. C., & Mensinger, A. F. Seasonal and daily patterns of the mating calls of the oyster toadfish, Opsanus tau. Biological Bulletin, 236(2), (2019):97-107, doi:10.1086/701754.
    Beschreibung: Acoustic communication is vital across many taxa for mating behavior, defense, and social interactions. Male oyster toadfish, Opsanus tau, produce courtship calls, or “boatwhistles,” characterized by an initial broadband segment (30–50 ms) and a longer tone-like second part (200–650 ms) during mating season. Male calls were monitored continuously with an in situ SoundTrap hydrophone that was deployed in Eel Pond, Woods Hole, Massachusetts, during the 2015 mating season. At least 10 vocalizing males were positively identified by their unique acoustic signatures. This resident population was tracked throughout the season, with several individuals tracked for extended periods of time (72 hours). Toadfish began calling in mid-May when water temperature reached 14.6 °C with these early-season “precursor” boatwhistles that were shorter in duration and contained less distinct tonal segments compared to calls later in the season. The resident toadfish stopped calling in mid-August, when water temperature was about 25.5 °C. The pulse repetition rate of the tonal part of the call was significantly related to ambient water temperature during both short-term (hourly) and long-term (weekly) monitoring. This was the first study to monitor individuals in the same population of oyster toadfish in situ continuously throughout the mating season.
    Beschreibung: We thank Emily Cardinal for help with data collection and initial hydrophone setup, the Marine Resources Center at Marine Biological Laboratory for dock space and resources, John Atkins for SoundTrap hydrophone support, and Beth Giuffrida for analysis support. Rosalyn Putland and Jenni Stanley are gratefully acknowledged for coding assistance. We also thank UCSBPSTAT for statistics guidance.We are also grateful to the three anonymous reviewers and the editor for their comments. This study was made possible by National Science Foundation grants IOS 1354745 and DBI 1359230.
    Beschreibung: 2020-02-08
    Repository-Name: Woods Hole Open Access Server
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  • 9
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    On predicting abundance from occupancy (2010)
    University of Chicago Press
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    Publikationsdatum: 2022-05-25
    Beschreibung: Author Posting. © University of Chicago, 2010. This article is posted here by permission of University of Chicago for personal use, not for redistribution. The definitive version was published in American Naturalist 176 (2010): 96-98, doi:10.1086/653077.
    Beschreibung: There is growing interest in predicting the abundance of a species in a region from the occupancy of cells in a uniform grid overlaid on the region. When the number of individuals in each cell follows a negative binomial distribution, prediction is in general not possible from the number of unoccupied cells alone. A prediction method based on the number of unoccupied cells and the number containing a single individual is described and shown to work well on simulated and real data.
    Schlagwort(e): Negative binomial distribution ; Optimal prediction ; Species abundance ; Species occupancy
    Repository-Name: Woods Hole Open Access Server
    Materialart: Article
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  • 10
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    Pond fractals in a tidal flat (2015)
    American Physical Society
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    Publikationsdatum: 2022-05-25
    Beschreibung: © The Author(s), 2015. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Physical Review E Statistical, Nonlinear, and Soft Matter Physics 92 (2015): 052128, doi: 10.1103/PhysRevE.92.052128.
    Beschreibung: Studies over the past decade have reported power-law distributions for the areas of terrestrial lakes and Arctic melt ponds, as well as fractal relationships between their areas and coastlines. Here we report similar fractal structure of ponds in a tidal flat, thereby extending the spatial and temporal scales on which such phenomena have been observed in geophysical systems. Images taken during low tide of a tidal flat in Damariscotta, Maine, reveal a well-resolved power-law distribution of pond sizes over three orders of magnitude with a consistent fractal area-perimeter relationship. The data are consistent with the predictions of percolation theory for unscreened perimeters and scale-free cluster size distributions and are robust to alterations of the image processing procedure. The small spatial and temporal scales of these data suggest this easily observable system may serve as a useful model for investigating the evolution of pond geometries, while emphasizing the generality of fractal behavior in geophysical surfaces.
    Beschreibung: This material is based upon work supported by the National Science Foundation Graduate Research Fellowship Program under Grant No. 2388357, the Gordon and Betty Moore Foundation, and the National Science Foundation, Award No. OCE-1315201.
    Repository-Name: Woods Hole Open Access Server
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