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  • 1
    Publication Date: 2023-11-14
    Keywords: benthic habitats; Cliona sp.; Date/Time of event; DEPTH, sediment/rock; Elevation of event; Event label; Grab; GRAB; Helgoland; Latitude of event; Lithology/composition/facies; Longitude of event; MYA2019/06; MYA2019/06_1; MYA2019/06_10; MYA2019/06_11; MYA2019/06_12; MYA2019/06_13; MYA2019/06_14; MYA2019/06_15; MYA2019/06_16; MYA2019/06_17; MYA2019/06_18; MYA2019/06_19; MYA2019/06_2; MYA2019/06_20; MYA2019/06_21; MYA2019/06_22; MYA2019/06_3; MYA2019/06_4; MYA2019/06_5; MYA2019/06_6; MYA2019/06_7; MYA2019/06_8; MYA2019/06_9; Mya II; North Sea; off Helgoland, North Sea; Ostrea edulis; Ostrea edulis, shell; seafloor properties
    Type: Dataset
    Format: text/tab-separated-values, 44 data points
    Location Call Number Limitation Availability
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  • 2
    Publication Date: 2023-11-14
    Keywords: benthic habitats; Cliona sp.; DATE/TIME; DEPTH, water; Drift Video; DRVID; Event label; Helgoland; LATITUDE; Lithology/composition/facies; LONGITUDE; MYA2019/06; MYA2019/06_10a; MYA2019/06_10b; MYA2019/06_11a; MYA2019/06_11b; MYA2019/06_11c; MYA2019/06_12a; MYA2019/06_12b; MYA2019/06_13a; MYA2019/06_13b; MYA2019/06_14a; MYA2019/06_14b; MYA2019/06_4a; MYA2019/06_4b; MYA2019/06_5a; MYA2019/06_5b; MYA2019/06_6a; MYA2019/06_6b; MYA2019/06_7a; MYA2019/06_7b; MYA2019/06_8a; MYA2019/06_8b; MYA2019/06_9a; MYA2019/06_9b; MYA2019/06_HD_8a; Mya II; North Sea; off Helgoland, North Sea; ORDINAL NUMBER; Ostrea edulis; seafloor properties; Video identification
    Type: Dataset
    Format: text/tab-separated-values, 35098 data points
    Location Call Number Limitation Availability
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  • 3
    Publication Date: 2024-01-26
    Description: Chemical dyes, such as Calcein, can be used to create incremental markings for measuring bivalve growth in shell cross-sections. For the European Oyster Ostrea edulis, potential negative effects and limits for this staining have not been assessed yet. In this study, Ostrea edulis individuals were stained with three different Calcein concentrations (100 mg l−1, 150 mg l−1, 200 mg l−1) at three different immersion times (6 h, 12 h, 24 h) to test the potential negative effects, the best incremental marking result and their potential to be used in growth measurements. The dataset includes the growth measurements of the individuals at the time of staining in Mai 2021 and the growth measurements after a growth period of 5 months (N=10 per treatment). In November 2021, the success of the staining was evaluated using a fluorescence microscope by measuring the increment from the staining line to the edge of the shell. For some individuals, a clean measurement was not possible. Either because the oysters were broken due to handling or because the line was not clearly visible. However, at least 7 or more oysters were measured per treatment. The survival rate for all concentrations and the control was 100%.
    Keywords: Caliper; European oyster; Fluorochrome dye; Helgoland; In-situ fluorescent marking; Laboratory experiment; Mesocosm studies; Ostrea_edulis_growth_phase; Ostrea edulis, growth; Ostrea edulis, height; Ostrea edulis, shell, dry mass; Ostrea edulis, shell, wet mass; Ostrea edulis, soft tissue, dry mass; Ostrea edulis, soft tissue, wet mass; Ostrea edulis, valve, length; Ostrea edulis, valve, width; Ostrea edulis, water content; Ostrea edulis, wet mass; Recapture; Research Stereomicroscope System, Olympus, SZX12 with an external fluorescence light source, Olympus, Model U-ULS100HG; restoration; Restoration of the European oyster (Ostrea edulis) in the German North Sea: Development and practical testing of methods and approaches for a sustainable population recovery; RESTORE; Sample code/label; Sampling date/time, experiment; Scale, Sartorius, TE412 [accuracy 0.01g]; Tagging; Treatment: calcein concentration; Treatment: time after
    Type: Dataset
    Format: text/tab-separated-values, 2212 data points
    Location Call Number Limitation Availability
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  • 4
    Publication Date: 2024-04-20
    Description: A recently encountered fossil oyster bed (Ostrea edulis) located in the sublittoral zone offshore the island of Helgoland (German Bight, Europe) was investigated. During a ship campaign in June 2019 onboard RV „Mya II“, the local extent and surface properties of the oyster bed were determined by submersible underwater drift video and grab sampling. The aim of this study was to facilitate the first description of a sublittoral oyster bed in the area and to understand its past ecological state and the reasons of its demise. Ostera edulis and associated habitats disappeared from the North Sea at the beginning of the last century and are a current focal point of restoration initiatives across Europe. Oyster shells were collected from the grab samples, cataloged and systematically analyzed. The weight of the valves was determined on a laboratory scale in grams with a precision of two decimals. The length (mm), width (mm), and degree of infestation (%) by the boring sponge Cliona sp. were digitally determined for each valve on the base of photographic images in the open-source software ImageJ (https://imagej.nih.gov/ij/).
    Keywords: benthic habitats; Cliona sp.; Helgoland; North Sea; Ostrea edulis; seafloor properties
    Type: Dataset
    Format: application/zip, 18 datasets
    Location Call Number Limitation Availability
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  • 5
    Publication Date: 2024-04-20
    Description: The presented data shows the results of suitability analyses to assess potential restoration grounds for ostrea edulis in the German Bight's marine protected areas (MPA) Borkum Reef Ground and Sylt Outer Reef. We made use of existing marine data from various sources and applied a spatial multicriteria decision analysis (MCDA). Spatial input variables are scored uniformly in order to express their respective ability to improve restoration preconditions. They are summed in a linear combination using expert's judgements founded weights using the analytical hierarchy process (AHP) algorithm. Datasets which describe circumstances to prevent a successful restoration are subtracted from the resulting suitable area. The dataset presented here includes the resulting raster datasets as described in out publication. Detailed metadata on the original raw data (not included here) are listed in Table 1 of the publication. The Analysis was performed in 2021 and modified in 2022.
    Keywords: AHP; Coastal; Ecological restoration; ecosystem service; File content; invertebrates; Marine Protected Area (MPA); MCDA; MULT; multicriteria decision analysis; Multiple investigations; Ostrea_edulis_German_Bight_MPA; Ostrea edulis; Oyster; Raster graphic, GeoTIFF format; reef; Restoration of the European oyster (Ostrea edulis) in the German North Sea: Development and practical testing of methods and approaches for a sustainable population recovery; RESTORE
    Type: Dataset
    Format: text/tab-separated-values, 6 data points
    Location Call Number Limitation Availability
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  • 6
    Publication Date: 2024-04-20
    Keywords: benthic habitats; Cliona sp.; Grab; GRAB; Helgoland; Image; Infestation; Infestation area, inner site; Infestation area, outer site; MYA2019/06; MYA2019/06_5; Mya II; North Sea; off Helgoland, North Sea; Ostrea edulis; Ostrea edulis, valve; Ostrea edulis, valve, area; Ostrea edulis, valve, length; Ostrea edulis, valve, mass; Ostrea edulis, valve, width; seafloor properties; Specimen identification
    Type: Dataset
    Format: text/tab-separated-values, 660 data points
    Location Call Number Limitation Availability
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  • 7
    Publication Date: 2024-04-20
    Keywords: Grab; GRAB; Image; Infestation; Infestation area, inner site; Infestation area, outer site; MYA2019/06; MYA2019/06_10; Mya II; off Helgoland, North Sea; Ostrea edulis, valve; Ostrea edulis, valve, area; Ostrea edulis, valve, length; Ostrea edulis, valve, mass; Ostrea edulis, valve, width; Specimen identification
    Type: Dataset
    Format: text/tab-separated-values, 363 data points
    Location Call Number Limitation Availability
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  • 8
    Publication Date: 2024-04-20
    Keywords: Grab; GRAB; Image; Infestation; Infestation area, inner site; Infestation area, outer site; MYA2019/06; MYA2019/06_12; Mya II; off Helgoland, North Sea; Ostrea edulis, valve; Ostrea edulis, valve, area; Ostrea edulis, valve, length; Ostrea edulis, valve, mass; Ostrea edulis, valve, width; Specimen identification
    Type: Dataset
    Format: text/tab-separated-values, 154 data points
    Location Call Number Limitation Availability
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  • 9
    Publication Date: 2024-04-20
    Keywords: Grab; GRAB; Image; Infestation; Infestation area, inner site; Infestation area, outer site; MYA2019/06; MYA2019/06_20; Mya II; off Helgoland, North Sea; Ostrea edulis, valve; Ostrea edulis, valve, area; Ostrea edulis, valve, length; Ostrea edulis, valve, mass; Ostrea edulis, valve, width; Specimen identification
    Type: Dataset
    Format: text/tab-separated-values, 517 data points
    Location Call Number Limitation Availability
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  • 10
    Publication Date: 2024-04-20
    Keywords: Grab; GRAB; Image; Infestation; Infestation area, inner site; Infestation area, outer site; MYA2019/06; MYA2019/06_18; Mya II; off Helgoland, North Sea; Ostrea edulis, valve; Ostrea edulis, valve, area; Ostrea edulis, valve, length; Ostrea edulis, valve, mass; Ostrea edulis, valve, width; Specimen identification
    Type: Dataset
    Format: text/tab-separated-values, 154 data points
    Location Call Number Limitation Availability
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