Browsing Bergen Open Research Archive by Author "Straube, Nicolas"
Now showing items 1-15 of 15
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Cryptic persistence and loss of local endemism in Lake Constance charr subject to anthropogenic disturbance
Baer, Jan; Schliewen, Ulrich K.; Schedel, Frederic D. B.; Straube, Nicolas; Roch, Samuel; Brinker, Alexander (Journal article; Peer reviewed, 2023)In the welcome circumstance that species believed extinct are rediscovered, it is often the case that biological knowledge acquired before the presumed extinction is limited. Efforts to address these knowledge gaps, in ... -
First in situ documentation of a fossil tooth of the megatooth shark Otodus (Megaselachus) megalodon from the deep sea in the Pacific Ocean
Pollerspöck, Jürgen; Cares, Danielle; Ebert, David A.; Kelley, Katherine A.; Pockalny, Robert; Robinson, Rebecca S.; Wagner, Daniel; Straube, Nicolas (Journal article; Peer reviewed, 2023)In this short communication, we describe the first reported case of an in-situ observation and subsequent sampling of a fossil Otodus megalodon tooth from a deep-sea locality in the Pacific Ocean (14.11332°N, 167.39357°W; ... -
Head anatomy of a lantern shark wet-collection specimen (Chondrichthyes: Etmopteridae)
Staggl, Manuel Andreas; Ruthensteiner, Bernhard; Straube, Nicolas (Journal article; Peer reviewed, 2023)In this study, we apply a two-step (untreated and soft tissue stained) diffusible iodine-based contrast-enhanced micro-computed tomography array to a wet-collection Lantern Shark specimen of Etmopterus lucifer. The focus ... -
Intraspecific dental variations in the deep-sea shark Etmopterus spinax and their significance in the fossil record
Straube, Nicolas; Pollerspöck, Jürgen (Journal article; Peer reviewed, 2020)An important character on several taxonomic levels for shark identification is the tooth morphology. Sharks show a variety of highly specialized dentitions reflecting adaptations to their feeding habits. Intraspecific ... -
Mitochondrial DNA sequencing of a wet-collection syntype demonstrates the importance of type material as genetic resource for lantern shark taxonomy (Chondrichthyes: Etmopteridae)
Straube, Nicolas; Preick, Michaela; Naylor, Gavin J.P.; Hofreiter, Michael (Journal article; Peer reviewed, 2021)After initial detection of target archival DNA of a 116-year-old syntype specimen of the smooth lantern shark, Etmopterus pusillus, in a single-stranded DNA library, we shotgun-sequenced additional 9 million reads from ... -
Molecular analyses of confiscated shark fins reveal shortcomings of CITES implementations in Germany
Villate-Moreno, Melany; Pollerspöck, Jürgen; Kremer-Obrock, Friederike; Straube, Nicolas (Journal article; Peer reviewed, 2021)A three-ton shipment of dry shark fins was examined by German customs in 2017 leading to the confiscation of 405 kg of potential CITES species. We analyzed a subsample of this material (115 specimens) using DNA sequence-based ... -
Molecular identification and first demographic insights of sharks based on artisanal fisheries bycatch in the Pacific Coast of Colombia: implications for conservation
Villate-Moreno, Melany; Cubillos-M, Juan Camilo; Stibor, Herwig; Crawford, Andrew J.; Straube, Nicolas (Journal article; Peer reviewed, 2022)The Pacific coast of Colombia is characterized by mangrove ecosystems which play a crucial role as possible nurseries for juvenile sharks. However, trophic food webs from coastal ecosystems are heavily disturbed by increased ... -
New records of fossil deep-sea shark teeth from the Lillebælt Clay (Early–Middle Eocene) of Denmark
Pollerspöck, Jürgen; Nielsen, Kent Albin; Feichtinger, Iris; Straube, Nicolas (Journal article; Peer reviewed, 2023)This study describes for the first time a number of distinct fossil teeth documenting several deep-sea shark species from the Eocene, which were previously not recorded from the North Sea Basin, including Apristurus sp., ... -
Placoid scales in bioluminescent sharks: Scaling their evolution using morphology and elemental composition
Lourtie, Alexia; Duchatelet, Laurent; Straube, Nicolas; Puozzo, Nathan; Grace, Mark A.; Naylor, Gavin J. P.; Delroisse, Jérome (Journal article; Peer reviewed, 2022)Elasmobranchs are characterised by the presence of placoid scales on their skin. These scales, structurally homologous to gnathostome teeth, are thought to have various ecological functions related to drag reduction, ... -
Revision of the Cretaceous shark Protoxynotus (Chondrichthyes, Squaliformes) and early evolution of somniosid sharks
Feichtinger, I.; Guinot, G.; Straube, Nicolas; Harzhauser, M.; Auer, G.; Ćorić, S.; Kranner, M.; Schellhorn, S.; Ladwig, J.; Thies, D.; Pollerspöck, J. (Journal article; Peer reviewed, 2022)Due to the peculiar combination of dental features characteristic for different squaliform families, the position of the Late Cretaceous genera Protoxynotus and Paraphorosoides within Squaliformes has long been controversial. ... -
Simultaneous barcode sequencing of diverse museum collection specimens using a mixed RNA bait set
Straube, Nicolas; Agne, Stefanie; Preick, Michaela; Hofreiter, Michael (Journal article; Peer reviewed, 2022)A growing number of publications presenting results from sequencing natural history collection specimens reflect the importance of DNA sequence information from such samples. Ancient DNA extraction and library preparation ... -
Successful application of ancient DNA extraction and library construction protocols to museum wet collection specimens
Straube, Nicolas; Lyra, Mariana L.; Paijmans, Johanna L. A.; Preick, Michaela; Basler, Nikolas; Penner, Johannes; Rödel, Mark-Oliver; Westbury, Michael V; Haddad, Célio F. B.; Barlow, Axel; Hofreiter, Michael (Journal article; Peer reviewed, 2021)Millions of scientific specimens are housed in museum collections, a large part of which are fluid preserved. The use of formaldehyde as fixative and subsequent storage in ethanol is especially common in ichthyology and ... -
Taxonomic Identification of Two Poorly Known Lantern Shark Species Based on Mitochondrial DNA From Wet-Collection Paratypes
Agne, Stefanie; Naylor, Gavin J. P.; Preick, Michaela; Yang, Lei; Thiel, Ralf; Weigmann, Simon; Paijmans, Johanna L. A.; Barlow, Axel; Hofreiter, Michael; Straube, Nicolas (Journal article; Peer reviewed, 2022)Etmopteridae (lantern sharks) is the most species-rich family of sharks, comprising more than 50 species. Many species are described from few individuals, and re-collection of specimens is often hindered by the remoteness ... -
Trophic position of Otodus megalodon and great white sharks through time revealed by zinc isotopes
McCormack, Jeremy; Griffiths, Michael L.; Kim, Sora L.; Shimada, Kenshu; Karnes, Molly; Maisch, Harry; Pederzani, Sarah; Bourgon, Nicolas; Jaouen, Klervia; Becker, Martin A.; Jöns, Niels; Sisma-Ventura, Guy; Straube, Nicolas; Pollerspöck, Jürgen; Hublin, Jean-Jacques; Eagle, Robert A.; Tütken, Thomas (Journal article; Peer reviewed, 2022)Diet is a crucial trait of an animal’s lifestyle and ecology. The trophic level of an organism indicates its functional position within an ecosystem and holds significance for its ecology and evolution. Here, we demonstrate ... -
Wide-spread dispersal in a deep-sea brooding polychaete: the role of natural history collections in assessing the distribution in quill worms (Onuphidae, Annelida)
Budaeva, Nataliya; Agne, Stefanie; de Azevedo Ribeiro, Pedro Miguel; Straube, Nicolas; Preick, Michaela; Hofreiter, Michael (Journal article; Peer reviewed, 2024)Background Modern integrative taxonomy-based annelid species descriptions are detailed combining morphological data and, since the last decades, also molecular information. Historic species descriptions are often ...