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  • 1
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    2D multichannel seismic reflection processed data (GI Gun working area dataset) of RV SONNE during cruise SO292, Queensland Plateau, Coral Sea (2024)
    PANGAEA
    Details
    Publication Date: 2024-07-01
    Description: The seismic data were collected on the Queensland Plateau during RV SONNE expedition SO292 in spring 2022 (Betzler et al., 2022). The seismic signals were generated by two simultaneously released GI-Gun (true GI-Modus; primary volume of 45 in3) and a Mini-GI source (true GI-Modus; primary volume of 15 in3), towed 41 m behind the ship's stern and in a water depth of ca. 2.5 m. Sources were released by a GPS-controlled PC every 18.75 m at 160 bar. To synchronize seismic sources and trigger the recording system, a SureShot trigger system was used. This system allowed to display and adjust the source signatures measured by hydrophones attached to the seismic sources for each shot and therefore enabled an online quality control during the watchkeeping. The streamer was a Hydroscience Technologies SeaMUX 144-channel system with an active length of 600 m and symmetric group interval. The recording length was set to 4 s, the sample interval was 1 ms. Raw data were stored in SEG-Y format. All seismic profiles were processed on board with the 2021 VISTA® desktop seismic data processing software by Schlumberger. The main processing steps were Bandpass filtering (18/25 – 350/450 Hz), velocity analysis (every 25-500 CMP), spherical divergence correction, NMO-correction and stack, FD migration, topmute, data enhancement (white noise removal, fx deco), scaling. Processed data contained in this dataset are stored as SEG-Y. UTM coordinates (UTM zone 55) are stored at trace header position 181 (4-byte) and 185 (4-byte).
    Keywords: Binary Object; Binary Object (File Size); Binary Object (MD5 Hash); Binary Object (Media Type); Coral Sea; ICECARB; Profile ID; SEIS; Seismic; Seismic reflection profile; SEISREFL; SO292; SO292_43-1; Sonne_2; Start of data file recording, latitude; Start of data file recording, longitude; Stop of data file recording, latitude; Stop of data file recording, longitude
    Type: Dataset
    Format: text/tab-separated-values, 42 data points
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  • 2
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    Informe : Los estudios genéticos en la merluza Merluccius hubbsi (Marini 1933) entre los 32°S y los 50°S de latitud. Análisis de la información genética generada en la DINARA. (2024)
    DINARA | Montevideo, Uruguay
    Details
    Publication Date: 2024-06-30
    Description: PNUD
    Description: Unpublished
    Description: Non Refereed
    Keywords: ASFA_2015::P::Population genetics ; ASFA_2015::H::Hake fisheries
    Repository Name: AquaDocs
    Type: Report
    Format: 21pp.
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  • 3
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    La investigación marina en Colombia una actividad de prioridad nacional (2024)
    Details
    Publication Date: 2024-06-30
    Description: Las aguas marinas cubren el 70 % de la tierra. Encierran riquezas animales, vegetales y minerales, cuyo valor real es aún incalculable. Sus aguas poseen una riqueza de compuestos orgánicos e inorgánicos, comparable o superior a la de la tierra. La riqueza pesquera, fuente de proteína animal, ha sido explotada con un fin comercial exclusivamente, sin mayores bases científicas acerca de la biología y ecología de las especies, lo que se ha constituido en una sobreexplotación, que ya ha hecho disminuir y casi desaparecer a varios de sus representantes. Los peces, lo mismo que muchos invertebrados / marinos, son explotados a menudo por monopolios nacionales e internacionales, utilizando la mayoría de las veces, técnicas muy destructivas, pues en muchas ocasiones sólo el 20 ó 30 % de los arrastres son aprovechados. Es decir, sólo los mejores ejemplares son aceptados por los mercados internacionales, y el resto, que bien pudiera ser utilizado en su alimentación por miles de personas, es arrojado de nuevo al mar, como residuo inservible.
    Description: Published
    Description: Refereed
    Keywords: Investigación Marina y Costera ; ASFA_2015::M::Marine fish
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: 1-6 pp
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  • 4
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    Análisis del desembarque de Condrictios por la flota de arrastre costero uruguaya en el Río de la Plata y Zona Común de Peca. Año 2012 (2024)
    DINARA | Montevideo, Uruguay
    Details
    Publication Date: 2024-06-30
    Description: Se analizó la información de desembarque proveniente de los partes de pesca de la flota industrial costera en el año 2012 para las principales especies de Condrictios. En dicho año la flota realizó 984 viajes de pesca y un total de 8.471 lances en el área del Río de la Plata (RP) y la Zona Común de Pesca (ZCP). Las especies de Condrictios con mayor volumen desembarcado fueron el gatuzo Mustelus schmitti (254 t), el angelito Squatina guggenheim (115 t) y la raya lisa Rioraja agassizi (53 t), totalizando las tres especies el 92% del volumen desembarcado de Condrictios. Un total de 434 t fue desembarcado dentro de la categoría “Varios”, la cual puede enmascarar capturas de cualquier especie. Las épocas del año con mayor volumen desembarcado, teniendo en cuenta el esfuerzo pesquero, fueron primavera y verano, siendo octubre y noviembre los meses de mayor rendimiento para M. schmitti y noviembre y diciembre para S. guggenheim. Los valores más altos de captura por unidad de esfuerzo de angelito ocurrieron en la zona costera frente a Rocha, mientras que los de gatuzo ocurrieron frente a la costa de Canelones y Maldonado fuera del RP. Los mayores rendimientos para la raya lisa ocurrieron en el área oceánica al este de Punta del Este. La presencia en los partes de pesca de la categoría “Varios”, el gran número de lances negativos (alta ausencia) de Condrictios, así como la cuantificación de algunas especies en “piezas” y no en peso, demostraron que la captura de las diferentes especies de Condrictios está subestimada. Es esencial una mejora en la calidad de los datos de captura retenida y también descartada de las diferentes especies del grupo Condrictios para evaluar el estado de los stocks de este grupo de peces en el área de estudio.
    Description: Published
    Description: Refereed
    Keywords: Chondrichthyans ; ASFA_2015::T::Trawling
    Repository Name: AquaDocs
    Type: Report
    Format: 24pp.
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  • 5
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    Marine habitat mapping. (2024)
    European Marine Board | Ostend, Belgium
    Details
    Publication Date: 2024-06-30
    Description: EMB Future Science Brief No. 11 ‘Marine habitat mapping’ presents science and policy needs and recommendations to advance next-generation marine habitat mapping. This document highlights current methods and future trends in the acquisition of data from the seabed and water column via remote sensing and direct, in situ techniques. It discusses combining data to produce maps using modelling approaches and presents recommendations for adopting fit-for-purpose habitat classification schemes. It also provides an overview of what has been mapped and where within the European sea-basins, highlights the need to increase the quality and resolution of marine habitat maps. It identifies critical gaps in habitat types and geographic extent, including the coastal areas, the deep sea, Natura 2000 sites and other Marine Protected Areas across all regional seas. Finally, it describes the need to improve the assessment and communication of uncertainty and confidence in maps, and to make maps more easily accessible to a variety of stakeholders to increase their value for end-users and to the public for Ocean literacy.
    Description: Published
    Description: Refereed
    Keywords: marine habitat mapping ; conservation ; restoration
    Repository Name: AquaDocs
    Type: Report
    Format: 74pp.
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  • 6
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    Características poblacionales de Diadema antillarum (Philippi, 1845) (Echinoidea: Diadematidae) en arrecifes de la región noroccidental Cuba. (2024)
    Details
    Publication Date: 2024-06-30
    Description: Diadema antillarum es considerada como el principal invertebrado herbívoro de los arre- cifes de coral del Caribe. Debido a la significación que representa esta especie, en esta investigación se evaluaron indicadores poblacionales de la misma en las crestas arrecifales de playa Baracoa y Rincón de Guanabo, costa noroccidental de Cuba. Los muestreos se realizaron en enero-marzo de 2021. Se estimó la densidad media, diámetro medio de la testa, porcentaje de juveniles y adultos, de agregaciones y albinismo de D. antillarum para cada cresta. Las variables fueron evaluadas utilizando un transecto de banda de 10 m de largo por 1 m de ancho. La densidad media de D. antillarum en playa Baracoa (19.28 ± 14.40 ind./10 m2) fue superior al valor reportado en Rincón de Guanabo (0.78 ± 0.43 ind./10 m2) y en algunos arrecifes del Caribe. En playa Baracoa el porcentaje de indivi- duos adultos representa el 95.25 % del total. El diámetro medio de D. antillarum en playa Baracoa (5.53 ± 1.76 cm) y Rincón de Guanabo (3.05 ± 1.56 cm) resultó ser inferior al reportado en algunos arrecifes del Caribe. En playa Baracoa se encontraron 148 agrega- ciones y 40 individuos albinos. El número bajo de individuos en el Rincón de Guanabo (47) ha generado varias hipótesis que necesitaran ser corroboradas en el futuro. No se en- contró evidencia de la pandemia que sufre D. antillarum en el Caribe, lo cual se considera un indicador positivo. Se recomienda evaluar el manejo (restauración) de la especie en la cresta del Rincón de Guanabo.
    Description: Diadema antillarum is considered the main herbivorous invertebrate of Caribbean co- ral reefs. Due to the significance of this specie for coral reefs, our research focused on evaluating ecological indicators of D. antillarum in the reef crests of Baracoa beach and Rincón de Guanabo on the northwestern coast of Cuba. The study was conducted between January and March of 2021. We assessed the mean density, test mean diameter, percentage of juveniles and adults, aggregations, and instances of albinism in D. anti- llarum for each crest. These variables were measured using a 10-m-long and 1-m-wide belt transect. The mean density of D. antillarum in Baracoa beach (19.28 ± 14.40 ind./10 m2) was higher than that in Rincón de Guanabo (0.78 ± 0.43 ind./10 m2) and other Caribbean reefs. In Baracoa beach, adults accounted 95.25 % of the total individuals found in this crest. The mean diameter of D. antillarum in Baracoa beach (5.53 ± 1.76 cm) and Rincón de Guanabo (3.05 ± 1.56 cm) was lower than that observed in other Caribbean reefs. In Baracoa beach, we identified 148 aggregations and 40 individuals with albinism. The low number (47) of D. antillarum individuals in Rincón de Guanabo generates new hypothesis that have to be tested in the future. No evi- dence of the pandemic affecting D. antillarum in the Ca- ribbean was found, which is considered a positive indicator. It is recommended to evaluate management (restoration) for the species in the Rincón de Guanabo crest.
    Description: Published
    Description: Refereed
    Keywords: Albinismo ; Conducta ; Crestas de arrecifes ; Erizo negro de espinas largas ; Herbivoría ; Albinism ; Behaviour ; Reef´s crests ; Black sea urchin with long spines ; Herbivory
    Repository Name: AquaDocs
    Type: Journal Contribution
    Format: pp.115-140
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  • 7
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    Amplified seasonality in western Europe in a warmer world (2024)
    In:  Science Advances vol. 10 no. 20
    Details
    Publication Date: 2024-06-30
    Description: Documenting the seasonal temperature cycle constitutes an essential step toward mitigating risks associated with extreme weather events in a future warmer world. The mid-Piacenzian Warm Period (mPWP), 3.3 to 3.0 million years ago, featured global temperatures approximately 3°C above preindustrial levels. It represents an ideal period for directed paleoclimate reconstructions equivalent to model projections for 2100 under moderate Shared Socioeconomic Pathway SSP2- 4.5. Here, seasonal clumped isotope analyses of fossil mollusk shells from the North Sea are presented to test Pliocene Model Intercomparison Project 2 outcomes. Joint data and model evidence reveals enhanced summer warming (+4.3° ± 1.0°C) compared to winter (+2.5° ± 1.5°C) during the mPWP, equivalent to SSP2-4.5 outcomes for future climate. We show that Arctic amplification of global warming weakens mid- latitude summer circulation while intensifying seasonal contrast in temperature and precipitation, leading to an increased risk of summer heat waves and other extreme weather events in Europe’s future.
    Keywords: Aragonitic bivalve shells ; Sea-surface temperature ; North-Sea ; Atmospheric circulation ; PLIOMIP2 simulations ; Arctic amplification ; Marine heatwaves ; Summer drought ; Wadden Sea ; Pliocene
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
    Format: application/pdf
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  • 8
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    Mitochondrial Cytochrome Oxidase Subunit 1: A Promising Molecular Marker for Species Identification in Foraminifera (2022)
    Frontiers Media SA
    In:  Frontiers in Marine Science vol. 9 no. 809659
    Details
    Publication Date: 2024-06-30
    Description: Traditional morphological methods for species identification are highly time consuming, especially for small organisms, such as Foraminifera, a group of shell-building microbial eukaryotes. To analyze large amounts of samples more efficiently, species identification methods have extended to molecular tools in the last few decades. Although a wide range of phyla have good markers available, for Foraminifera only one hypervariable marker from the ribosomal region (18S) is widely used. Recently a new mitochondrial marker cytochrome oxidase subunit 1 (COI) has been sequenced. Here we investigate whether this marker has a higher potential for species identification compared to the ribosomal marker. We explore the genetic variability of both the 18S and COI markers in 22 benthic foraminiferal morphospecies (orders Miliolida and Rotaliida). Using single-cell DNA, the genetic variability within specimens (intra) and between specimens (inter) of each species was assessed using next-generation sequencing. Amplification success rate was twice as high for COI (151/200 specimens) than for 18S (73/200 specimens). The COI marker showed greatly decreased intra- and inter-specimen variability compared to 18S in six out of seven selected species. The 18S phylogenetic reconstruction fails to adequately cluster multiple species together in contrast to COI. Additionally, the COI marker helped recognize misclassified specimens difficult to morphologically identify to the species level. Integrative taxonomy, combining morphological and molecular characteristics, provides a robust picture of the foraminiferal species diversity. Finally, we suggest the use of a set of sequences (two or more) to describe species showing intra-genomic variability additionally to using multiple markers. Our findings highlight the potential of the newly discovered mitochondrial marker for molecular species identification and metabarcoding purposes.
    Keywords: protist ; high-throughput sequencing ; metabarcoding ; intra-genomic variation ; benthic foraminifera
    Repository Name: National Museum of Natural History, Netherlands
    Type: info:eu-repo/semantics/article
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  • 9
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    Physical oceanography measured with Underway-CTD (UCTD) during Akademik Tryoshnikov cruise Arctic Century 2021 Expedition (AT21), Arctic Ocean (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-30
    Description: Underway-CTD (UCTD) data were collected during an August-September 2021 expedition to the Arctic Ocean aboard the RV Akademik Tryoshnikov. The underway CTD manufactured by Ocean Science is a self-contained free-falling probe measuring temperature, conductivity, depth while the ship is transiting. The UCTD was operated mostly in yoyo-mode during selected transects on the shelf of the Kara and Laptev Seas and between the shelf and the basin across the continental slope of the Eurasian Basin while the ship was transiting with 4 - 10 knots. The UCTD probe records the start time of the measurements and stores 16 samples each second internally. The exact location of each profile was subsequently found based on the time stamp from the cruise track. The unpumped conductivity sensor has a slower response time than the temperature sensor, which makes the computation of salinity from conductivity and temperature potentially spiky, especially in the pycnocline or in frontal regions. We followed the recommendation of the manufacturer to calculate salinity with Seabird processing software. The salinity is given as Practical Salinity (PSU). The raw data profiles are provided as well and can be reprocessed if desired. In shallower waters (〈300 m), the water column was profiled all the way to the seafloor, while in deeper waters, only the upper 300-600 m were sampled. The UCTD was calibrated against a Seabird 9+ CTD during the cruise. The upper 5 m of the data were discarded due to the influence of the ship. The icebreaker Akademik Tyoshnikov has a deep draft. Mixing of the water column caused by the ship can reach depths of up to about 10 m, depending on the weather conditions and the ship's speed. The data are provided by the Arctic Century Expedition, a joint initiative led by the Swiss Polar Institute (SPI), the Antarctic and Arctic Research Institute (AARI) and GEOMAR Helmholtz Centre for Ocean Research Kiel (GEOMAR) and funded by the Swiss Polar Foundation, AARI, Minobrnauki (CATS RFMEFI61619X0108) and BMBF (CATS 03F0831)
    Keywords: Akademik Tryoshnikov; ArcticCentury; Arctic Century Expedition; Arctic Ocean; AT21; AT21_015-A; AT21_016-A; AT21_016-B; AT21_017-A; AT21_017-B; AT21_020-A; AT21_025-A; AT21_025-B; AT21_025-C; AT21_025-D; AT21_026-A; AT21_027-A; AT21_028-A; AT21_029-A; AT21_030-A; AT21_037-A; AT21_042; AT21_044; AT21_046; AT21_048; AT21_052; AT21_054; AT21_070-A; AT21_070-B; AT21_070-C; AT21_070-D; AT21_070-E; AT21_070-F; AT21_079-C; AT21_079-D; AT21_079-E; AT21_079-F; AT21_079-G; AT21_079-H; AT21_079-I; AT21_079-J; AT21_079-K; AT21_079-L; AT21_079-M; AT21_079-N; AT21_079-O; AT21_079-P; AT21_079-Q; AT21_079-R; AT21_079-S; AT21_079-T; AT21_079-U; AT21_081; AT21_082; AT21_083; AT21_084; AT21_085; AT21_086; AT21_087; AT21_088; AT21_090; AT21_091; AT21_094; AT21_095; AT21_099; AT21_100; AT21_101; AT21_102; AT21_105; AT21_115; AT21_118; AT21_120; AT21_121; AT21_123; AT21_124; Barents Sea; CATS; CATS - The Changing Arctic Transpolar System; Conductivity; CTD, underway; CTD-UW; Date/Time of event; DEPTH, water; Elevation of event; Event label; Kara Sea; Laptev Sea; Latitude of event; Longitude of event; Pressure, water; Salinity; Station label; Temperature, water
    Type: Dataset
    Format: text/tab-separated-values, 103960 data points
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  • 10
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    Nutrients, oxygen, total alkalinity, pH, and physical oceanography measured on water bottle samples during Akademik Tryoshnikov cruise Arctic Century 2021 Expedition (AT21), Arctic Ocean (2022)
    PANGAEA
    Details
    Publication Date: 2024-06-30
    Description: A standard CTD system from Sea-Bird Electronics Inc SBE911+ with duplicate temperature and conductivity sensors was used to measure temperature, conductivity and pressure at 81 stations during an expedition to the Kara and Laptev Seas and the adjacent Arctic Ocean in August-September 2021 aboard the research vessel Akademik Tryoshnikov. We followed the recommendation of the manufacturer to calculate salinity with Seabird processing software. The salinity is given as Practical Salinity (PSU). The accuracy of the conductivity sensors was verified by measurements on water samples with a salinometer. The data set published here includes only the data from the first conductivity (SN 3290) and temperature (SN 4127) sensors. Only at station 26 the data of the second sensor pair (SN 2618/Cond, SN 5115/Temp) were used. The CTD was connected to a SBE32 Carousel Water Sampler with 24 12-liter bottles. Additionally, a Benthos Altimeter and a Wetlabs ECO-AFL Fluorometer were connected to the SBE911+ system. At 69 stations, 846 seawater samples were collected for analysis of dissolved inorganic nutrients (nitrate, nitrite, phosphate, ammonium, silicate), oxygen, total alkalinity, and pH. Dissolved inorganic nutrients were analyzed using a segmented flow analyzer from Seal Analytical. Ammonium was measured manually (colorimetric method) using a spectrophotometer (Shimadzu UV-1800). Dissolved oxygen was determined by the standard Winkler titration method using a Metrohm 916 TiTouch automatic titrator and a handheld titrator (BRAND). pH and total alkalinity were measured by potentiometric titration using an automatic titrator (Metrohm 916 TiTouch). The data are provided by the Arctic Century Expedition, a joint initiative led by the Swiss Polar Institute (SPI), the Antarctic and Arctic Research Institute (AARI) and GEOMAR Helmholtz Centre for Ocean Research Kiel (GEOMAR) and funded by the Swiss Polar Foundation, AARI, Minobrnauki (CATS RFMEFI61619X0108) and BMBF (CATS 03F0831).
    Keywords: Akademik Tryoshnikov; Alkalinity, total; Ammonium; ArcticCentury; Arctic Century Expedition; Arctic Ocean; AT21; AT21_001-5; AT21_002-1; AT21_003-1; AT21_004-1; AT21_005-1; AT21_006-1; AT21_007-1; AT21_008-1; AT21_009-1; AT21_010-1; AT21_012-1; AT21_013-1; AT21_015-1; AT21_016-1; AT21_017-1; AT21_018-1; AT21_019-1; AT21_020-1; AT21_020-5; AT21_022-1; AT21_023-1; AT21_024-1; AT21_026-1; AT21_027-1; AT21_028-1; AT21_029-1; AT21_030-1; AT21_031-1; AT21_032-1; AT21_034-1; AT21_035-1; AT21_036-1; AT21_037-1; AT21_038-1; AT21_039-1; AT21_040-1; AT21_040-6; AT21_041-1; AT21_043-1; AT21_045-1; AT21_047-1; AT21_049-1; AT21_050-1; AT21_051-1; AT21_053-1; AT21_055-1; AT21_057-1; AT21_058-1; AT21_059-1; AT21_060-1; AT21_061-1; AT21_062-1; AT21_064-1; AT21_065-1; AT21_066-1; AT21_067-1; AT21_068-1; AT21_069-1; AT21_070-1; AT21_071-1; AT21_072-1; AT21_073-1; AT21_075-1; AT21_089-1; AT21_093-1; AT21_097-1; AT21_098-1; AT21_104-1; AT21_106-1; AT21_107-1; AT21_108-1; AT21_109-1; AT21_110-1; AT21_111-1; AT21_112-1; AT21_113-1; AT21_114-1; AT21_117-1; AT21_119-1; AT21_122-1; AT21_125-1; Barents Sea; Bottle number; Calculated; CATS; CATS - The Changing Arctic Transpolar System; Conductivity; CTD, Sea-Bird SBE 911plus; CTD/Rosette; CTD-RO; Date/Time of event; DEPTH, water; Elevation of event; Event label; Fluorescence, chlorophyll; Fluorometer, WET Labs ECO AFL/FL; Kara Sea; Laptev Sea; Latitude of event; Longitude of event; Nitrate; Nitrite; nutrients; Oxygen, dissolved; pH; Phosphate; physical oceanography; Potentiometric titration, Metrohm 916 TiTouch; Pressure, water; Salinity; Sample code/label; Segmented flow analyzer, Seal Analytical; shelf-basin transects; Silicate; Spectrophotometer Shimadzu UV-1800; St. Anna Trough; Station label; Temperature, water; Titration, Winkler
    Type: Dataset
    Format: text/tab-separated-values, 21531 data points
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