GLORIA

GEOMAR Library Ocean Research Information Access

X
feed icon rss

Your email was sent successfully. Check your inbox.

An error occurred while sending the email. Please try again.

Proceed reservation?

Export
Filter
  • 2020-2023  (6)
  • 2020-2022  (8)
Document type
Keywords
Publisher
Language
Years
Year
  • 1
    facet.materialart.
    Unknown
    The lesser Pacific Striped Octopus, Octopus chierchiae: an emerging laboratory model (2022)
    Frontiers Media
    Details
    Publication Date: 2022-10-27
    Description: © The Author(s), 2021. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Grearson, A. G., Dugan, A., Sakmar, T., Sivitilli, D. M., Gire, D. H., Caldwell, R. L., Niell, C. M., Doelen, G., Wang, Z. Y., & Grasse, B. The lesser Pacific Striped Octopus, Octopus chierchiae: an emerging laboratory model. Frontiers in Marine Science, 8, (2021): 753483, https://doi.org/10.3389/fmars.2021.753483.
    Description: Cephalopods have the potential to become useful experimental models in various fields of science, particularly in neuroscience, physiology, and behavior. Their complex nervous systems, intricate color- and texture-changing body patterns, and problem-solving abilities have attracted the attention of the biological research community, while the high growth rates and short life cycles of some species render them suitable for laboratory culture. Octopus chierchiae is a small octopus native to the central Pacific coast of North America whose predictable reproduction, short time to maturity, small adult size, and ability to lay multiple egg clutches (iteroparity) make this species ideally suited to laboratory culture. Here we describe novel methods for multigenerational culture of O. chierchiae, with emphasis on enclosure designs, feeding regimes, and breeding management. O. chierchiae bred in the laboratory grow from a 3.5 mm mantle length at hatching to an adult mantle length of approximately 20–30 mm in 250–300 days, with 15 and 14% survivorship to over 400 days of age in first and second generations, respectively. O. chierchiae sexually matures at around 6 months of age and, unlike most octopus species, can lay multiple clutches of large, direct-developing eggs every ∼30–90 days. Based on these results, we propose that O. chierchiae possesses both the practical and biological features needed for a model octopus that can be cultured repeatedly to address a wide range of biological questions.
    Description: The cephalopod program at the Marine Biological Laboratory (MBL) was supported by NSF 1827509 and NSF 1723141 grants. CN received funding from HFSP RGP0042. DG and DS received funding and research support from the University of Washington Friday Harbor Laboratories. ZYW was supported by funds from the Whitman Center at the MBL.
    Keywords: Iteroparity ; Cephalopod ; Model organism ; Aquaculture ; Reproduction – mollusk ; Developmental biology ; Neurobiology
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 2
    facet.materialart.
    Unknown
    Intensified aridity over the Indo-Pacific Warm Pool controlled by ice-sheet expansion during the Last Glacial Maximum (2022)
    ELSEVIER SCIENCE BV
    In:  EPIC3Global and Planetary Change, ELSEVIER SCIENCE BV, 217, ISSN: 0921-8181
    Details
    Publication Date: 2022-10-19
    Repository Name: EPIC Alfred Wegener Institut
    Type: Article , peerRev
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 3
    facet.materialart.
    Unknown
    Genome and transcriptome mechanisms driving cephalopod evolution (2022)
    Nature Research
    Details
    Publication Date: 2022-08-19
    Description: © The Author(s), 2022. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Albertin, C. B., Medina-Ruiz, S., Mitros, T., Schmidbaur, H., Sanchez, G., Wang, Z. Y., Grimwood, J., Rosenthal, J. J. C., Ragsdale, C. W., Simakov, O., & Rokhsar, D. S. Genome and transcriptome mechanisms driving cephalopod evolution. Nature Communications, 13(1), (2022): 2427, https://doi.org/10.1038/s41467-022-29748-w.
    Description: 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. The coleoid genomes feature multi-megabase, tandem arrays of genes associated with brain development and cephalopod-specific innovations. We find that a known coleoid hallmark, extensive A-to-I mRNA editing, displays two fundamentally distinct patterns: one exclusive to the nervous system and concentrated in genic sequences, the other widespread and directed toward repetitive elements. We conclude that coleoid novelty is mediated in part by substantial genome reorganization, gene family expansion, and tissue-dependent mRNA editing.
    Description: We thank the Marine Resources Center and the Cephalopod program at the Marine Biological Laboratory for supplying D. pealeii, R. Hanlon for the image in Fig. 1a, R. Hanlon and S. Senft for help with tissue dissection, Dr. Chuck Winkler for supplying O. bimaculoides, B. Burford and W. Gilly for assistance with D. opalescens collection, and the Vienna Zoo (Tiergarten Schönbrunn), particularly R. Halbauer, A. Weissenbacher, and the aquarist team for E. scolopes husbandry. Computation was done using the Life Science Cluster at the University of Vienna. This project began with generous funding from the Grass Foundation, administered by the MBL through J.J.R. It was also supported by Austrian Science fund FWF (P30686-B29) to H.S. and O.S., the Whitman Center Early Career Fellowship to O.S., the Okinawa Institute of Science and Technology Molecular Genetics Unit, Chan-Zuckerberg BioHub, and the Marthella Foskett Brown Chair in Computational Biology to D.S.R, NSF grant (IOS-1354898) to C.W.R, and the Hibbitt Early Career Fellowship to C.B.A. Sequencing at the University of Chicago Functional Genomics Facility was partially supported by the NIH (5UL1TR002389-02 and UL1 TR000430).
    Repository Name: Woods Hole Open Access Server
    Type: Article
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    PAPER (OA)
  • 4
    facet.materialart.
    Unknown
    Remote sensing of night lights: A review and an outlook for the future (2020)
    In:  Remote Sensing of Environment
    Details
    Publication Date: 2020-12-10
    Description: Remote sensing of night light emissions in the visible band offers a unique opportunity to directly observe human activity from space. This has allowed a host of applications including mapping urban areas, estimating population and GDP, monitoring disasters and conflicts. More recently, remotely sensed night lights data have found use in understanding the environmental impacts of light emissions (light pollution), including their impacts on human health. In this review, we outline the historical development of night-time optical sensors up to the current state of the art sensors, highlight various applications of night light data, discuss the special challenges associated with remote sensing of night lights with a focus on the limitations of current sensors, and provide an outlook for the future of remote sensing of night lights. While the paper mainly focuses on space borne remote sensing, ground based sensing of night-time brightness for studies on astronomical and ecological light pollution, as well as for calibration and validation of space borne data, are also discussed. Although the development of night light sensors lags behind day-time sensors, we demonstrate that the field is in a stage of rapid development. The worldwide transition to LED lights poses a particular challenge for remote sensing of night lights, and strongly highlights the need for a new generation of space borne night lights instruments. This work shows that future sensors are needed to monitor temporal changes during the night (for example from a geostationary platform or constellation of satellites), and to better understand the angular patterns of light emission (roughly analogous to the BRDF in daylight sensing). Perhaps most importantly, we make the case that higher spatial resolution and multispectral sensors covering the range from blue to NIR are needed to more effectively identify lighting technologies, map urban functions, and monitor energy use.
    Type: info:eu-repo/semantics/article
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    GFZ OAI
  • 5
    facet.materialart.
    Unknown
    Evaluating gas generation and preservation of the Wufeng-Longmaxi Formation shale in southeastern Sichuan Basin, China: Implications from semiclosed hydrous pyrolysis (2021)
    In:  Marine and Petroleum Geology
    Details
    Publication Date: 2021-05-04
    Description: The oil expulsion efficiency of organic-rich shale during peak oil generation influences the generation of shale gas at high maturity, while the gas expulsion and loss efficiency affect the enrichment and preservation of shale gas. Two series of semiclosed hydrous pyrolysis experiments were performed under in situ geological conditions on Devonian shale sample as comparable analogue to evaluate the generation and preservation potential of shale gas in the Wufeng-Longmaxi Formation shale in the southeastern Sichuan Basin. The results indicate that the maximum oil expulsion efficiency of the Wufeng-Longmaxi shale is 68.8%. Retained oil is the main source of shale gas formed at high maturity. When the value of equal vitrinite reflectance (EqVRo) reaches 3.18%, the total gas generative potential from the retained oil and kerogen is 214.06 mL/g TOC, while that from kerogen is only 69.84 mL/g TOC. Overall, retained oil-formed gas at high maturity (EqVRo 〉1.30%) accounts for 60.82%–68.26% of the total gas, and the kerogen-formed gas is between 31.74% and 39.18% of the total gas. Based on the analysis of the JY2 well, Wufeng-Longmaxi shales with TOC contents 〉1.5% lose 60–80% of the total gas, while shales with TOC contents 〈1.5% lose 70–100% of the total gas. A TOC content of 1.5% can still meet the 2 m3/t gas content as evaluation standard for selecting favorable marine shale gas play areas in China.
    Type: info:eu-repo/semantics/article
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    GFZ OAI
  • 6
    facet.materialart.
    Unknown
    Assessing the Gas Potential of the Lower Paleozoic Shale System in the Yichang Area, Middle Yangtze Region (2021)
    In:  Energy & Fuels
    Details
    Publication Date: 2021-04-29
    Description: This study aims to characterize the geological properties and to evaluate the gas potential of the lower Paleozoic shales in the Yichang area by integrating a series of analyses on geology and geochemistry, well logging data, and 2D seismic interpretation. The thickness of the lower Cambrian Shuijingtuo shale is less than 10 m in the southeast but may exceed 120 m in the southwest area. The thickness of the upper Ordovician Wufeng shale and the lower Silurian Longmaxi shale (hereafter referred to as the Wufeng-Longmaxi shale) gradually increases in thickness from 〈10 m in the south to 40–50 m in the northeast. The organic matter of the above two sets of black shale is mainly dominated by type I and II1 kerogen. The thickness of black shale units with TOC 〉 2% is more than 10–20 m, commonly located at the bottom of the shale intervals. Black shales near the Huangling anticline have low thermal maturity due to its relatively shallow burial. The predominant minerals are quartz and clay minerals. Carbonate contents of the Shuijingtuo shale are relatively high compared to the Wufeng-Longmaxi shale. Pores are more developed in the Wufeng-Longmaxi shale than those in the Shuijingtuo shale. Natural fractures are common in the Shuijingtuo shale but are rare in the Wufeng-Longmaxi shale. The well logging and lab analytical results both indicate that the natural gas content in the black shales is relatively high. The prospective area of the Shuijingtuo interval for shale gas production is nearly 670 km2, located in the southwestern region. In contrast, the prospective area of the Wufeng-Longmaxi interval for shale gas production is approximately 1590 km2, situated in the eastern area.
    Type: info:eu-repo/semantics/article
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    GFZ OAI
  • 7
    facet.materialart.
    Unknown
    Retired satellites: A chance to shed light (2021)
    In:  Science
    Details
    Publication Date: 2021-10-04
    Language: English
    Type: info:eu-repo/semantics/article
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    GFZ OAI
  • 8
    facet.materialart.
    Unknown
    Kinetic controls on Sc distribution in diopside and geochemical behavior of Sc in magmatic systems (2022)
    In:  Geochimica et Cosmochimica Acta
    Details
    Publication Date: 2022-06-09
    Description: Scandium is important in modern technology and is regarded as a strategic metal in many countries. It is highly dispersed in Earth’s crust and rarely forms independent minerals. Clinopyroxene is the most important Sc-bearing mineral in some world-class deposits hosted in mafic–ultramafic intrusions, which are also the major source of laterite-hosted Sc deposits. However, the factors controlling Sc distribution in minerals have been little explored, impeding the understanding of the geochemical behavior of Sc and why it is common in some clinopyroxene grains. The newly discovered Mouding Sc deposit in SW China is hosted in a zoned intrusion composed, from core to rim, of monzogabbro, syenogabbro, gabbro, magnetite clinopyroxenite, and clinopyroxenite. Clinopyroxene in the intrusion is diopsidic in composition with high Sc contents (80–105 ppm). In-situ trace element mappings of diopside crystals reveal homogeneous, zoned, swallow-tailed, and hourglass internal Sc distribution patterns. These patterns can be produced through kinetically controlled incorporation of Sc on different crystal faces. The preferential substitution of Sc can take place on the {1 0 0}, {1 1 0} and {0 1 0} prism faces because of the high flexibility of the octahedral M1 protosites. The fast growth of diopside, which facilitates kinetically controlled crystallization, is dominated by textural coarsening and promoted by the hydrous parental magmas with low viscosities and active convection. The active flow and efficient interstitial communication of the magma can direct compatible elements from the magma into clinopyroxene, thus favoring formation of Sc-rich grains. Our study provides a feasible way to study intra-grain variations of Sc in minerals and emphasizes that kinetic effects may play a critical role in Sc distribution and enrichment in hydrous magmatic Sc deposits. We also show that disequilibrium crystallization may be more pervasive than previously thought, and the hourglass zoning of clinopyroxene can provide valuable information on this process.
    Language: English
    Type: info:eu-repo/semantics/article
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    GFZ OAI
  • 9
    facet.materialart.
    Unknown
    Multiple angle observations would benefit visible band remote sensing using night lights (2022)
    In:  Journal of Geophysical Research: Atmospheres
    Details
    Publication Date: 2022-07-07
    Description: The spatial and angular emission patterns of artificial and natural light emitted, scattered, and reflected from the Earth at night are far more complex than those for scattered and reflected solar radiation during daytime. In this commentary, we use examples to show that there is additional information contained in the angular distribution of emitted light. We argue that this information could be used to improve existing remote sensing retrievals based on night lights, and in some cases could make entirely new remote sensing analyses possible. This work will be challenging, so we hope this article will encourage researchers and funding agencies to pursue further study of how multi-angle views can be analyzed or acquired.
    Type: info:eu-repo/semantics/article
    Format: application/pdf
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    GFZ OAI
  • 10
    facet.materialart.
    Unknown
    Integrated GNSS Doppler velocity determination for GEOHALO airborne gravimetry (2021)
    In:  GPS Solutions
    Details
    Publication Date: 2021-12-15
    Description: A gravity sensor onboard an aircraft always measures the sum of all accelerations acting on the sensor. To separate the accelerations caused by the movement of the aircraft from the gravitational accelerations, the movement, including position, velocity, and acceleration of the aircraft, must be measured independently. Nowadays, this is possible using GNSS. Obviously, this means that the kinematic acceleration must be measured or derived from GNSS measurements as accurately as the gravity survey. Compared to the traditional airborne gravimetry, the determination of positions and velocities from GNSS is a big challenge for the special HALO aircraft, which is characterized by high-altitude and long-range flying capability. A strategy of integrated GNSS Doppler velocity determination based on a combination of robust estimation and Helmert variance components estimation (VCE) is proposed in this study to fulfill the requirements for this aircraft. This strategy is tested by processing GNSS Doppler data recorded onboard the HALO aircraft. The velocity obtained has been applied in the data processing of the GEOHALO airborne gravimetry campaign of 2012. The results show that the proposed strategy improves GNSS Doppler velocity determination accuracy and allows the subtraction of the kinematic vertical accelerations from the GEOHALO airborne gravimetry records.
    Type: info:eu-repo/semantics/article
    Location Call Number Limitation Availability
    BibTip Others were also interested in ...
    GFZ OAI
Close ⊗
This website uses cookies and the analysis tool Matomo. More information can be found here...