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174 results for “jellyfish”
Spatiotemporal Dataset on Moon Jellyfish (Aurelia aurita) Incidental Observations in the Gulf of Riga and Eastern Gotland Basin, Baltic Sea
<p>This data article describes the occurrences of the moon jelly <em>Aurelia aurita </em>medusae in the Eastern Gotland basin and the Gulf of Riga (Baltic Sea) between 1998 and 2023. All data are incidental observations obtained during Latvian national monitoring cruises. </p>
Dataset: Correlative Light, Electron Microscopy and Raman Spectroscopy Workflow to Detect and Observe Microplastic Interactions with Whole Jellyfish
<p>ABSTRACT</p> <p>Many researchers have turned their attention to understanding microplastic interaction with marine fauna. Efforts are being made to monitor exposure pathways and concentrations, and to assess the impact such interactions may have. To answer these questions, it is important to select appropriate experimental parameters and analytical protocols. This study focuses on medusae of <em>Cassiopea andromeda</em> jellyfish: a unique benthic jellyfish known to favor (sub-)tropical coastal regions which are potentially exposed to plastic waste from land-based sources. Juvenile medusae were exposed to fluorescent poly(ethylene terephthalate) and polypropylene microplastics (< 300 µm), resin embedded, and sectioned before analysis with confocal laser scanning microscopy as well as transmission electron microscopy and Raman Spectroscopy. Results show the fluorescent microplastics were stable enough to be detected with the optimized analytical protocol presented, and that their observed interaction with medusae occurs in a manner which is likely driven by the microplastic properties (<em>e.g.</em> density, hydrophobicity).</p>
Fig. 8 in Population dynamics and predatory impact of the alien jellyfish Aurelia solida (Cnidaria, Scyphozoa) in the Bizerte Lagoon (southwestern Mediterranean Sea) Abstract
Fig. 8: Path diagram of the interaction between the abiotic (temperature, salinity) and biotic parameter (chlorophyll biomass, mesozooplankton and Aurelia solida) in Bizerte lagoon in 2013 and 2014.
Fig. 6 in Population dynamics and predatory impact of the alien jellyfish Aurelia solida (Cnidaria, Scyphozoa) in the Bizerte Lagoon (southwestern Mediterranean Sea) Abstract
Fig. 6: Prey selectivity of Aurelia solida in Bizerte Lagoon during the present study; Har = Harpacticoids; Biv = bivalve larvae; Gas = gastropods larvae; Lar = larvaceans; Fis = Fish larvae; Cru = crustacean larvae; Cal = Calanoids; Cla = Cladocerans.
Fig. 5 in Population dynamics and predatory impact of the alien jellyfish Aurelia solida (Cnidaria, Scyphozoa) in the Bizerte Lagoon (southwestern Mediterranean Sea) Abstract
Fig. 5: Relation between Aurelia solida bell diameter (cm) and (A) the prey in the gut contents and (B) the prey diversity.
Fig. 4 in Population dynamics and predatory impact of the alien jellyfish Aurelia solida (Cnidaria, Scyphozoa) in the Bizerte Lagoon (southwestern Mediterranean Sea) Abstract
Fig. 4: Variation of the diet composition of Aurelia solida in Bizerte Lagoon in (A) 2013 and (B) 2014; (n) number of analyzed specimens.
Fig. 7 in Population dynamics and predatory impact of the alien jellyfish Aurelia solida (Cnidaria, Scyphozoa) in the Bizerte Lagoon (southwestern Mediterranean Sea) Abstract
Fig. 7: Seasonal variation of Aurelia solida (A-B) feeding rate (prey consumed medusae-1) and (C-D) predation impact (% prey standing stock consumed day-1) in Bizerte Lagoon in 2013-2014.
Fig. 3 in Population dynamics and predatory impact of the alien jellyfish Aurelia solida (Cnidaria, Scyphozoa) in the Bizerte Lagoon (southwestern Mediterranean Sea) Abstract
Fig. 3: Seasonal variation of Aurelia solida (A) abundance and (B) bell diameter in Bizerte lagoon between November 2012 and August 2014; white spots: 0 ind.m-3.
Fig. 1 in Population dynamics and predatory impact of the alien jellyfish Aurelia solida (Cnidaria, Scyphozoa) in the Bizerte Lagoon (southwestern Mediterranean Sea) Abstract
Fig. 1: Map of the Mediterranean Sea showing with locations of the sampling station and the transect in the Bizerte Lagoon between November 2012 and August 2014.
FIGURE 8 in The Sea Slug Phanerophthalmus luteus (Gastropoda: Opisthobranchia) and its Habitat and Ecology at the Marine Jellyfish Lake (Ongeim'l Tketau), Palau, Western Pacific Ocean
FIGURE 8. Central and Western Pacific showing the distribution of Phanerophthalmus luteus (black stars) and the location of Jellyfish Lake, Palau (large gray star). Modified from distribution map for P. luteus in Austin, Gosliner, and Malaquias (2018, fig. 23).
FIGURE 5 in The Sea Slug Phanerophthalmus luteus (Gastropoda: Opisthobranchia) and its Habitat and Ecology at the Marine Jellyfish Lake (Ongeim'l Tketau), Palau, Western Pacific Ocean
FIGURE 5. Hydrography of Jellyfish Lake. The water column is divided into an oxic and an anoxic zone by a bacterial plate that creates a chemo- and thermocline. The bacteria absorb all the light and digest most of the vegetation (except larger branches). No foraminifera or animals are known to live below the bacterial plate due to the absence of oxygen in the water column. Phanerophthalmus luteus is restricted to the upper 3 to 10 m in the oxygenated part of the water column; they are most abundant between 4.5 and 7.6 m. Figure modified from Venkateswaran et al. (1993) by adding the depth distribution of P. luteus.
FIGURE 4 in The Sea Slug Phanerophthalmus luteus (Gastropoda: Opisthobranchia) and its Habitat and Ecology at the Marine Jellyfish Lake (Ongeim'l Tketau), Palau, Western Pacific Ocean
FIGURE 4. Bathymetry of Jellyfish Lake, Mecherchar Island. The gray line with arrows indicates the area in the lake of our marine survey to 10 m deep for sea slugs along the north and east sides of the lake. Black circles indicate the transect and collecting stations for foraminifera used to estimate the depth distribution of Phanerophthalmus luteus. Map and transect from Lipps and Langer 1999.
FIGURE 3 in The Sea Slug Phanerophthalmus luteus (Gastropoda: Opisthobranchia) and its Habitat and Ecology at the Marine Jellyfish Lake (Ongeim'l Tketau), Palau, Western Pacific Ocean
FIGURE 3. Vegetation of Jellyfish Lake, Mecherchar Island. A. The lake, slightly less than 400 m long, is in a hole at least 230 m deep (150 to 200 m from the top of the hole to the Lake's surface and 30 m to the bottom of the lake) in the Miocene limestone. North is at the top of the image. B. Dense terrestrial vegetation, including mangroves at the lake edges, hangs over the lake. The surrounding vegetation contributes organic debris to the lake. C. Bottom of the lake from 0 to 13 m is covered with plant debris and algal growth. Photograph is at 2 m deep looking down slope. D. One of many logs that have fallen into the lake and are now inhabited by a wide variety of algae and animals including P. luteus. View is down the log from a depth of about 0.5 m. Credits: A. Aerial photograph courtesy of Dr. Pat Colin. B.-D. Photographs by Jere H. Lipps, 2013.
FIGURE 7 in The Sea Slug Phanerophthalmus luteus (Gastropoda: Opisthobranchia) and its Habitat and Ecology at the Marine Jellyfish Lake (Ongeim'l Tketau), Palau, Western Pacific Ocean
FIGURE 7. Egg masses (more or less spherical to oblong white objects) of Phanerophthalmus luteus attached to filamentous and other algae on a slope in Jellyfish Lake. Photograph taken November 16, 2009, courtesy of Lori J. Bell.
Fig. 7 in Comprehensive Analysis of the Jellyfish (Goette, 1886) (Semaeostomeae: Pelagiidae) with Description of the Complete rDNA Sequence.
Fig. 7. Nucleotide divergences of the cnidarians 18S and 28S rDNAs (datasets used in Table 1) based on corrected p-distances. Genetic distances between each paired sequence were calculated by the Kimura 2-parameter model, where a total of 16 cnidarian species were compared. Statistical analysis showed that the 18S rDNA divergences were significantly different from those of 28S rDNA (Student t-test, P <0.05, N = 66).
Fig. 6 in Comprehensive Analysis of the Jellyfish (Goette, 1886) (Semaeostomeae: Pelagiidae) with Description of the Complete rDNA Sequence.
Fig. 6. Phylogenetic relationships of the family Pelagiidae, including the genera Chrysaora, Pelagia and Sanderia, inferred from 18S rDNA (A), 28S rDNA (B) and morphological characters (C), which were redrawn from Fig. 95 in Morandini and Marques (2010). Phylogenetic trees of the rDNAs were constructed using the maximum-likelihood (ML) algorithms with the GTR+G model. A jellyfish Cyanea capillata (the family Cyaneidae) was used as the outgroup. Additional Bayesian trees generated similar branch patterns. The first and second numbers at the nodes display bootstrap proportions (BP) and posterior probabilities (PP) obtained in the ML and Bayesian analyses, respectively. Branch lengths are proportional to the scale given. Thick lines represent congruent branches between 18S and 28S, and morphological systematics.
Fig. 4. A in Comprehensive Analysis of the Jellyfish (Goette, 1886) (Semaeostomeae: Pelagiidae) with Description of the Complete rDNA Sequence.
Fig. 4. A dot matrix comparison of rDNA sequences between Chrysaora pacifica (KY 212123) and Aurelia coerulea (EU276014). Color scale bars represent consecutive sequence length of some regions detected similarly between the two sequence pairs. The open boxes in matrices indicate rDNA coding regions such as 18S, 5.8S, and 28S.
Fig. 2. A in Comprehensive Analysis of the Jellyfish (Goette, 1886) (Semaeostomeae: Pelagiidae) with Description of the Complete rDNA Sequence.
Fig. 2. A schematic representation of the single unit of rDNA (A), and GC content (%), nucleic acid distribution (% thymine), sequence complexity, and entropy (dS) in 100-bp windows across the entire rDNA nucleotides of Chrysaora pacifica (B). In the full rDNA (A), solid boxes indicate the ribosomal RNA genes and thin lines represent ITS or IGS. Nucleotide sequences in length and GC composition of each locus are represented near a line by calculation from a single unit of rDNA. The putative transcription start site is represented by an arrow; solid inverted-triangles represent sub-repeats in IGS.
Fig. 5. Phylogenetic relationships between jellyfishes within the order Semaeostomeae inferred from nearly complete 18S in Comprehensive Analysis of the Jellyfish (Goette, 1886) (Semaeostomeae: Pelagiidae) with Description of the Complete rDNA Sequence.
Fig. 5. Phylogenetic relationships between jellyfishes within the order Semaeostomeae inferred from nearly complete 18S rDNA (A) and partial 28S rDNA sequences (B) with maximum-likelihood (ML) algorithms. ML analyses of 18S and 28S were used as the nucleotide substitution model of GTR+G. Two hydrozoans (Hydractinia echinata and Podocoryne carnea for 18S rDNA; Astrohydra japonica and Melicertissa sp. for 28S) were included as the outgroups. Additional Bayesian analysis generated similar topology of the tree compared with the ML tree. Posterior probabilities (PP) from the analyses were incorporated into the ML tree to support the strength of each branch. The first and second numbers at the nodes display bootstrap proportions (BP) (> 50%) in ML and PP (> 0.50) in Bayesian, respectively. Branch lengths are proportional to the scale given. *Represents controversial species names, because they were suspected as different species by Bayha et al. (2017).
Fig. 1 in Comprehensive Analysis of the Jellyfish (Goette, 1886) (Semaeostomeae: Pelagiidae) with Description of the Complete rDNA Sequence.
Fig. 1. Live Chrysaora pacifica in natural habitat: basolateral (A and B), lateral (C) and apical view (D).
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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)
ABODe is a University of Edinburgh DataShare dataset for behavior classification in group-housed mice using home-cage video, identities, bounding boxes, ground-plate positions, and annotator labels.
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
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.