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Niche partitioning between planktivorous fish in the pelagic Baltic Sea assessed by DNA metabarcoding, qPCR and microscopy: Data and Analyses
<p class="MsoNormal"><span>Marine communities undergo rapid changes because of human-induced ecosystem pressures. The Baltic Sea pelagic food web has experienced several regime shifts during the past century, resulting in a system where competition between planktivorous mesopredators is assumed to be high. While the two clupeids sprat and herring reveal signs of competition, the stickleback population has increased drastically during the past decades. Here, we investigate diet overlap between the three dominating planktivorous fish in the Baltic Sea, utilizing DNA metabarcoding on the <em>18S rRNA</em> gene and the <em>COI </em>gene, targeted qPCR, and microscopy. Our results show niche differentiation between clupeids and stickleback and that rotifers play an important function in niche partitioning of stickleback, as a resource that is not being used, neither by the clupeids nor by other zooplankton. <span>We further show that all the diet assessment methods used in this study are consistent but DNA metabarcoding describes the plankton-fish link at the highest taxonomic resolution. </span>This study suggests that rotifers and other understudied soft-bodied prey may have an important function in the pelagic food web and that the growing population of pelagic stickleback is supported by the unutilized feeding niche offered by the rotifers.</span></p>
Fig. 4 in A new species of the genus Cottus (Scorpaeniformes, Cottidae) from the Baltic Sea Basin and its phylogenetic placement
Fig. 4. The result of statistical analysis of morphometric characters of type and non-type specimens of Cottus cyclophthalmus sp. nov. from rivers Krasnaya, Neris, Šerkšnė, Siesartis, and Žeimena (method of principal components was used). The numbers correspond to the places where the sculpins were caught, as indicated on the map (Fig. 1).
Fig. 2 in A new species of the genus Cottus (Scorpaeniformes, Cottidae) from the Baltic Sea Basin and its phylogenetic placement
Fig. 2. Cottus cyclophthalmus sp. nov., holotype, ♂ (ZIN 56687), SL 83.3 mm, TL 99.0 mm, Krasnaya River, near Tokarevka village, 54º24'59.4" N 22º23'50.4" E. 3D scan images. a. Lateral view. b. Dorsal view. c. Ventral view.
Fig. 1 in A new species of the genus Cottus (Scorpaeniformes, Cottidae) from the Baltic Sea Basin and its phylogenetic placement
Fig. 1. The map of sampling sites showing the distribution of Cottus cyclophtalmus sp. nov. The numbers indicate sampling sites in various rivers: 1. Krasnaya River. 2. Neris River. 3. Žeimena River. 4. Siesartis River. 5. Šerkšnė River. The star marks the type locality of the new species; the circles mark sampling sites of non-type specimens; the triangle marks the locality where specimen of Cottus microstomus sp. nov. was caught.
Fig. 3 in A new species of the genus Cottus (Scorpaeniformes, Cottidae) from the Baltic Sea Basin and its phylogenetic placement
Fig. 3. The zoological picture of the holotype of Cottus cyclophthalmus sp. nov. (ZIN 56687), SL 83.3 mm, lateral view.
Fig. 5 in A new species of the genus Cottus (Scorpaeniformes, Cottidae) from the Baltic Sea Basin and its phylogenetic placement
Fig. 5. The result of the DFA carried out on morphometric characters to discriminateCottus cyclophthalmus sp. nov. (green), Cottus gobio Linnaeus, 1758 (blue), and Cottus koshewnikowi Gratzianov, 1907 (red).
Common guillemots in the Baltic Sea studied with video surveillance and object detection: raw data, annotations, model, and model outputs
<p>The data comes from common guillemots studied at Stora Karlsö, Sweden between 2019 and 2021. The common guillemots breed at an artificial cliff, and has been filmed continusly from above over three breeding seasons. Using the video material, a YOLOv5 model has been trained to detect adult birds, chicks and eggs. The dataset contains annotations (bounding boxes) used for training the model, the model itself, and outputs from the model (object detections).</p> <p>The data can be used and shared freely.</p>
Figures 4-6 in Description of two clown beetles (Coleoptera: Staphyliniformia: Hydrophiloidea: Histeridae) from Baltic amber (Cenozoic, Paleogene, Eocene)
Figures 4-6. Xestipyge ikanti sp. nov. Holotype; No. 1470-6 [CCHH]. Habitus: 4 - Dorsal view; 5 - Ventral view; 6 - Dorso-frontal view.
Figure 7 in Description of two clown beetles (Coleoptera: Staphyliniformia: Hydrophiloidea: Histeridae) from Baltic amber (Cenozoic, Paleogene, Eocene)
Figure 7. Xestipyge ikanti sp. nov. Holotype; No. 1470-6 [CCHH]. Elytral striae basally (left side): subhumeral, 1-5 dorsal and sutural.
Figures 1-2 in Description of two clown beetles (Coleoptera: Staphyliniformia: Hydrophiloidea: Histeridae) from Baltic amber (Cenozoic, Paleogene, Eocene)
Figures 1-2. Carcinops donelaitisi sp. nov. Holotype; No. AWI-098 [CVIA]. Habitus: 1 - Dorsal view; 2 - Ventro-lateral view.
Figure 3 in New records from the southern North Sea and first records from the Baltic Sea of Kornmannia leptoderma
Figure 3: Phylogenetic tree of Ulvales and Ulothrichales exhibiting monostromatic morphologies. Maximum likelihood (ML) phylogenetic tree based on analysis of plastid tufA gene DNA partial sequences. ML bootstrap support values ≥90 are shown at each node. Branch lengths are drawn proportional to the amount of sequence change. GenBank accession numbers are indicated before species names. Names of target samples from the Baltic Sea are in bold. Prasiola stipitata and Bryopsis corticulans were used as outgroups.
Figure 1 in New records from the southern North Sea and first records from the Baltic Sea of Kornmannia leptoderma
Figure 1: Sites in Northern Germany where Kornmannia leptoderma has been collected. Numbers 1 to 16 indicate the location of collection sites along the Baltic Sea shore that were visited since 2013 in the present study, as listed in Table 1. Arrow indicates location of Helgoland in the North Sea, where additional samples were obtained at two sites in close proximity. Dotted line represents the Kiel Canal.
Figure 4 in New records from the southern North Sea and first records from the Baltic Sea of Kornmannia leptoderma
Figure 4: Sporophytes of Kornmannia leptoderma. (A) Living specimens from Heiligenhafen-Graswarder (22.8.2014); herbarium specimens from (B) Redentin (19.7.2013), (C) Heiligenhafen (20.7.2013, epiphytic on Fucus vesiculosus) and (D) Gollwitz (19.7.2013); natural assemblages at (E) Wulfen (27.9.2014) and (F) Redentin (19.7.2013). Scale bars in B-D = 2 cm.
Figure 4 in A new Eocene genus of the subtribe Tylodina (Coleoptera: Curculionidae) and notes concerning local differences of Baltic amber in the Kaliningrad Region
Figure 4. The main local sources of amber in the Kaliningrad Region: (a–c) the industrial open pit mining "Primorskoje" in Yantarny ("Palmnicken"), the Blaue Erde deposits (photographed 20 May 2019); (d–f) the Baltic Sea coasts southwards of the Yantarny settlement ("Nodems"), supralittoral zone after west wind (photographed 27 February 2019).
Figure 2 in A new Eocene genus of the subtribe Tylodina (Coleoptera: Curculionidae) and notes concerning local differences of Baltic amber in the Kaliningrad Region
Figure 2. Baltacalles triumurbium gen. et sp. nov., holotype, 6274 (MAIG): (a) forebody, lateral view; (b) details of left elytron, dorsal view. The arrows indicate long setae. Scale bars = 0.5 mm.
Figure 5 in A new Eocene genus of the subtribe Tylodina (Coleoptera: Curculionidae) and notes concerning local differences of Baltic amber in the Kaliningrad Region
Figure 5. The main local sources of amber in the Kaliningrad Region: (a–b) the illegal dig holes westwards of the Sosnovka settlement ("Steinitten") (photographed 15 February 2020); (c– d) the coast of the Vistula Lagoon ("Korschenruh") (photographed 17 February 2020).
Figure 1 in On the first Silis Charpentier, 1825 from Baltic amber (Coleoptera, Cantharidae)
Figure 1. Silis (Silis) lombardii sp. nov. in Baltic amber, holotype. (a) Dorsal view, scale bar = 1.0 mm. (b) Ventral view, scale bar = 1.0 mm.
Figure 3 in A new Eocene genus of the subtribe Tylodina (Coleoptera: Curculionidae) and notes concerning local differences of Baltic amber in the Kaliningrad Region
Figure 3. Map of the administrative subdivision of the Kaliningrad Region showing the main regional Baltic amber localities.
Figure 3 in On the first Silis Charpentier, 1825 from Baltic amber (Coleoptera, Cantharidae)
Figure 3. Silis (Silis) lombardii sp. nov. in Baltic amber, holotype. (a) Detail of pronotum (ventral view), elytra, legs and antennae with numbered antennomeres, scale bar = 0.5 mm. (b) Detail of last abdominal segments (lateral view), scale bar = 0.5 mm.
Figure 1 in A new Eocene genus of the subtribe Tylodina (Coleoptera: Curculionidae) and notes concerning local differences of Baltic amber in the Kaliningrad Region
Figure 1. Baltacalles triumurbium gen. et sp. nov., holotype, 6274 (MAIG): (a) habitus, dorsal view; (b) habitus, ventrolateral view; (c) habitus, left lateral view. Scale bars = 1 mm.
ScienceDex guides
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These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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
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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.