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670 results for “Molluscs”
Data from: Mollusc-shell debris can mitigate the deleterious effects of organic pollution on marine sediments
Organic pollution is widespread in coastal areas and can have profound impacts on the seabed. Coastal sediments play an important role at a global scale in the recycling of organic matter, and this process is influenced by the habitat complexity of the sediments, among other factors. Mollusc shells are produced as a waste product from a range of anthropogenic activities, but we demonstrate that they can be used to increase the habitat complexity of sediments. We studied the effect of mussel-shell debris (shell-hash) on the biogeochemical processes of marine sediments affected by organic pollution, using a mesocosm experiment simulating the bioturbation effects of macrofauna. We found that shell-hash improved the ecological status of organically polluted sediments by reducing the accumulation of sulphide from anaerobic metabolic pathways. Additionally, when shell-hash was present in an organically polluted sediment, there was a decrease in ammonium release to the water column, thus preventing the negative ecological consequences of eutrophication. Synthesis and applications. Our study indicates that shell-hash debris can be used as a potential tool to mitigate the effects of organic enrichment on marine sediments. A density of shell-hash debris of 1900 g m−2 in the sediment can diminish toxic by-products (sulphides and ammonium) derived from the stimulation of anaerobic metabolic pathways by organic pollution, at levels that are biologically relevant. The mitigation effect of shell-hash is more pronounced in sediments where macrofauna is not present.
Data from: Identification of North Sea molluscs with DNA barcoding
Sequence-based specimen identification, known as DNA barcoding, is a common method complementing traditional morphology-based taxonomic assignments. The fundamental resource in DNA barcoding is the availability of a taxonomically reliable sequence database to use as a reference for sequence comparisons. Here, we provide a reference library including 579 sequences of the mitochondrial cytochrome c oxidase subunit I for 113 North Sea mollusc species. We tested the efficacy of this library by simulating a sequence-based specimen identification scenario using Best Match, Best Close Match (BCM) and All Species Barcode (ASB) criteria with three different threshold values. Each identification result was compared with our prior morphology-based taxonomic assignments. Our simulation resulted in 87.7% congruent identifications (93.8% when excluding singletons). The highest number of congruent identifications was obtained with BCM and ASB and a 0.05 threshold. We also compared identifications with genetic clustering (Barcode Index Numbers, BINs) computed by the Barcode of Life Datasystem (BOLD). About 68% of our morphological identifications were congruent with BINs created by BOLD. Forty-nine sequences were clustered in 16 discordant BINs, and these were divided in two classes: sequences from different species clustered in a single BIN and conspecific sequences divided in more BINs. Whereas former incongruences were probably caused by BOLD entries in need of a taxonomic update, the latter incongruences regarded taxa requiring further investigations. These include species with amphi-Atlantic distribution, whose genetic structure should be evaluated over their entire range to produce a reliable sequence-based identification system.
FIG. 14. Hypselodoris nigrostriata Chag96 in Opisthobranch molluscs from the Chagos Archipelago, Central Indian Ocean
FIG. 14. Hypselodoris nigrostriata Chag96/58: tracing of SEM negatives, lateral teeth of row 30.
FIG. 5. Nembrotha lineolata Chag96 in Opisthobranch molluscs from the Chagos Archipelago, Central Indian Ocean
FIG. 5. Nembrotha lineolata Chag96 /62: tracing of SEM negatives, radula row 10/11.
FIG. 15. Dendrodoris tuberculosa Chag96 in Opisthobranch molluscs from the Chagos Archipelago, Central Indian Ocean
FIG. 15. Dendrodoris tuberculosa Chag96/7: ventral view.
FIG. 8. Hoplodoris estrelyado Chag96 in Opisthobranch molluscs from the Chagos Archipelago, Central Indian Ocean
FIG. 8. Hoplodoris estrelyado Chag96/89: tracing of SEM negatives, ®rst seven teeth of row 9.
FIG. 7. Halgerda willeyi Chag96 in Opisthobranch molluscs from the Chagos Archipelago, Central Indian Ocean
FIG. 7. Halgerda willeyi Chag96 /77: tracing of SEM negatives, last ®ve teeth of half row 27.
FIG. 1 in Opisthobranch molluscs from the Chagos Archipelago, Central Indian Ocean
FIG. 1. Map of the Chagos Archipelago.
Figs. 1–2 in Palaeogene continental molluscs of Oman
Figs. 1–2: Outcrops of the white fossiliferous beds in the Zalumah Formation at Wadi Darbat, Dhofar, Oman. Photos: R. Bonifer.
Figs. 13–14 in Palaeogene continental molluscs of Oman
Figs. 13–14: Limicolaria omanensis sp. nov. Fig. 13: Wadi Darbat, holotype NMBE 5018977 in frontal view. Fig. 14: Paratype NMBE 5018980, same locality, detail not to scale.
Supplementary material 1 from: Rosenfeld S, Aldea C, Mansilla A, Marambio J, Ojeda J (2015) Richness, systematics, and distribution of molluscs associated with the macroalga Gigartina skottsbergii in the Strait of Magellan, Chile: A biogeographic affinity study. ZooKeys 519: 49-100. https://doi.org/10.3897/zookeys.519.9676
Appendix: Explanation note: Species excluded from the analysis of Table 3 (biogeographic analysis)
Figure 9 from: Albano PG, Schnedl S-M, Eschner A (2018) An illustrated catalogue of Rudolf Sturany's type specimens in the Naturhistorisches Museum Wien, Austria (NHMW): deep-sea Eastern Mediterranean molluscs. Zoosystematics and Evolution 94(1): 29-56. https://doi.org/10.3897/zse.94.20116
Figure 9 Taranis alexandrina, Sturany, 1896, station 82, north of Alexandria, Egypt, 2420 m. A–F. Holotype NHMW 13002: original figures in Sturany, 1896 (A, F), front (B–C) and side (D) views, apex (E). G. Original label. Scale bars: 1 mm (B–D); 0.1 mm (E).
Figure 14 from: Albano PG, Schnedl S-M, Eschner A (2018) An illustrated catalogue of Rudolf Sturany's type specimens in the Naturhistorisches Museum Wien, Austria (NHMW): deep-sea Eastern Mediterranean molluscs. Zoosystematics and Evolution 94(1): 29-56. https://doi.org/10.3897/zse.94.20116
Figure 14 Lyonsia aegeensis Sturany, 1896, Station 199, southwest of Kythira, Sea of Crete, Greece, 875 m. A, K, L. Original figures in Sturany, 1896. B. Original label. C–J. Syntype NHMW 13004: outer view of left valve (C), inner view of right valve (E), microsculpture (D, F), hinge right valve (G, I) and left valve (H, J). Scale bar: 2 mm (C, E), 0.2 mm (D, F), 1 mm (G–J).
Figure 6 from: Albano PG, Schnedl S-M, Eschner A (2018) An illustrated catalogue of Rudolf Sturany's type specimens in the Naturhistorisches Museum Wien, Austria (NHMW): deep-sea Eastern Mediterranean molluscs. Zoosystematics and Evolution 94(1): 29-56. https://doi.org/10.3897/zse.94.20116
Figure 6 Marginella occulta var. minor Sturany, 1896, Station 194, between Kythira and Antikythira, Ionian Sea, Greece, 160 m. A–E. NHMW 13012: front (A–B), side (C–D) and back (E) views. F–H. NHMW 13012: front (F), side (G) and back (H) views. I. Original label. Scale bars: 0.5 mm.
Figure 10 from: Albano PG, Schnedl S-M, Eschner A (2018) An illustrated catalogue of Rudolf Sturany's type specimens in the Naturhistorisches Museum Wien, Austria (NHMW): deep-sea Eastern Mediterranean molluscs. Zoosystematics and Evolution 94(1): 29-56. https://doi.org/10.3897/zse.94.20116
Figure 10 Myrina modiolaeformis Sturany, 1896, station 82, north of Alexandria, Egypt, 2420 m. A, C, H. Syntype NHMW 13011a: outer (A) and inner (C) view, hinge (H). B, D–F. Original figures in Sturany, 1896. G. Original label. Scale bars: 1 mm.
Figure 13 from: Albano PG, Schnedl S-M, Eschner A (2018) An illustrated catalogue of Rudolf Sturany's type specimens in the Naturhistorisches Museum Wien, Austria (NHMW): deep-sea Eastern Mediterranean molluscs. Zoosystematics and Evolution 94(1): 29-56. https://doi.org/10.3897/zse.94.20116
Figure 13 Isorropodon perplexum Sturany, 1896, Station 82, north of Alexandria, Egypt, 2420 m. B–C, K. Syntype NHMW 13010a: outer (B) and inner (C) views, hinge (K). E–F, J. Syntype NHMW 13010b: outer (E) and inner (F) views, hinge (J). G. Original label. A, D, H–I. Original figures in Sturany, 1896. Scale bar: 1 mm.
Figure 5 from: Albano PG, Schnedl S-M, Eschner A (2018) An illustrated catalogue of Rudolf Sturany's type specimens in the Naturhistorisches Museum Wien, Austria (NHMW): deep-sea Eastern Mediterranean molluscs. Zoosystematics and Evolution 94(1): 29-56. https://doi.org/10.3897/zse.94.20116
Figure 5 Fusus bengasiensis Sturany, 1896, Station 36, north of Benghazi, Libya. A–C. Holotype NHMW 13000: front (A), side (B), and back (C) views E. Original label. D, F. Original figures in Sturany, 1896. Scale bar: 5 mm.
Figure 11 from: Albano PG, Schnedl S-M, Eschner A (2018) An illustrated catalogue of Rudolf Sturany's type specimens in the Naturhistorisches Museum Wien, Austria (NHMW): deep-sea Eastern Mediterranean molluscs. Zoosystematics and Evolution 94(1): 29-56. https://doi.org/10.3897/zse.94.20116
Figure 11 Lucina amorpha Sturany, 1896, station 82, north of Alexandria, Egypt, 2420 m. A. Original figure in Sturany, 1896. B, C, E. Holotype NHMW 13008: outer (B) and inner (C) views, hinge (E). D. Original label. Scale bar: 1 mm.
Figure 3 from: Albano PG, Schnedl S-M, Eschner A (2018) An illustrated catalogue of Rudolf Sturany's type specimens in the Naturhistorisches Museum Wien, Austria (NHMW): deep-sea Eastern Mediterranean molluscs. Zoosystematics and Evolution 94(1): 29-56. https://doi.org/10.3897/zse.94.20116
Figure 3 Scalaria cerigottana Sturany, 1896, Station 194, between Kythira and Antikythera, Ionian Sea, Greece, 160 m. A, J. Original figures in Sturany, 1896. B–D, F–I. Holotype NHMW 13001: front (B–C), side (F–G), and back (H) views, aperture (D), microsculpture (I). E. Original label. Scale bar: 1 mm (B–C, F–H); 0.5 mm (D, I).
Figure 12 from: Albano PG, Schnedl S-M, Eschner A (2018) An illustrated catalogue of Rudolf Sturany's type specimens in the Naturhistorisches Museum Wien, Austria (NHMW): deep-sea Eastern Mediterranean molluscs. Zoosystematics and Evolution 94(1): 29-56. https://doi.org/10.3897/zse.94.20116
Figure 12 Axinus flexuosus var. striatus Sturany, 1896, station 82, north of Alexandria, Egypt, 2420 m. A. Original figure in Sturany, 1896. B–E, G, H. Holotype NHMW 13009: outer (B–C) and inner (D–E) views, hinge (G–H). F. Original label. Scale bar: 1 mm.
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Allen Brain Atlas
Allen Brain Atlas is an Allen Institute collection of brain map atlases, datasets, APIs, and analysis tools covering mouse, human, and non-human primate brain resources.
Annotated Behaviour and Observability Dataset (ABODe)
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DANDI Archive for NWB datasets
DANDI is a BRAIN Initiative archive for publishing and sharing neurophysiology data, including electrophysiology, optophysiology, and behavioral data packaged as NWB and related standards.
International Brain Laboratory public data
The International Brain Laboratory public data releases expose standardized mouse decision-making experiments, including Neuropixels recordings, widefield calcium imaging, behavior, and session metadata accessed through the ONE API.
OpenNeuro
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