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828 results for “ascidian”
FIGURE 3. Dendrodoa aggregata. A in Shallow-water Ascidians from Matua Island (central Kuril Islands, NW Pacific)
FIGURE 3. Dendrodoa aggregata. A, intact specimens; B, specimen with test removed; C, specimen opened ventrally; D, same, with branchial sac removed.
FIGURE 1. Fimbrora calsubia. A and B in Deep-sea ascidians from Papua New Guinea
FIGURE 1. Fimbrora calsubia. A and B, ventral and dorsal sides of a specimen. C, neural area. D, detail of the ramified tissues of the posterior part of the abdomen stained with hemalum.
FIGURE 5. Culeolus recumbens. A in Deep-sea ascidians from Papua New Guinea
FIGURE 5. Culeolus recumbens. A, body with tunic, B, same than A without the tunic. C, body opened along the ventral line, branchial sac removed, stained with Masson's haemalum. Scale bars: A: 1cm; C: 5mm.
FIGURE 3. Dicopia fimbriata. A,B in Deep-sea ascidians from Papua New Guinea
FIGURE 3. Dicopia fimbriata. A,B both sides of a specimens with tunic, scale bar 1cm. C, specimen without tunic. D, atrial siphon aperture.
FIGURE 2. Fimbrora calsubia. A, branchial tissue stained with haemalum. B, body without tunic showing the atrial aperture. Scale bars 1 in Deep-sea ascidians from Papua New Guinea
FIGURE 2. Fimbrora calsubia. A, branchial tissue stained with haemalum. B, body without tunic showing the atrial aperture. Scale bars 1cm.
FIGURE 2 in Pattern of stigma numbers as a taxonomic character in some didemnid ascidians (Aplousobranchia: Didemnidae)
FIGURE 2. Component ratio of stigma patterns in the five morphotypes of Didemnum molle. Black indicates the eight stigma patterns found in all morphotypes; gray indicates the patterns shared in two to four morphotypes; white indicates the patterns unique to one morphotype.
FIGURE 1 in Pattern of stigma numbers as a taxonomic character in some didemnid ascidians (Aplousobranchia: Didemnidae)
FIGURE 1. Collection sites of didemnid ascidians in the Ryukyu Archipelago–Taiwan. The site symbols (A–O) correspond to those in TABLE 1. A: Bise, Okinawajima Island (26°42΄40"N, 127°52΄30"E); B: Seragaki, Okinawajima Island (26°30΄30"N, 127°51΄37"E); C: Manza, Okinawajima Island (26°30΄10"N, 127°50΄34"E); D: Zanpa, Okinawajima Island (26°26΄20"N, 127°42΄45"E); E: Nagahama, Okinawajima Island (26°25΄20"N, 127°44΄10"E); F: Odo, Okinawajima Island (26°5΄25"N, 127°42΄30"E); G:Nishizaki, Iejima Island, Okinawajima Islands (26°42΄30"N, 127°45΄40"E); H: Sesoko,Sesokojima Island, Okinawajima Islands (26°38΄50"N, 127°52΄25"E); I: Shinri-hama, Kumejima Island, Okinawajima Islands (26°20΄57"N, 126°42΄50"E); J: Ara-hama, Kumejima Island (26°18΄55"N, 126°46΄25"E); K: Nagama-hama, Kurimajima Island, Miyako Islands (24°43΄40"N, 125°14΄25"E); L: Kaiji-hama, Taketomi Island, Yaeyama Islands (24°18΄50"N, 124°4΄50"E); M: Nakamoto, Kuroshima Island, Yaeyama Islands (24°13΄50"N, 123°59΄50"E); N: Gueiwan, Lyudao, Taiwan (22°38΄45"N, 121°28΄32"E); and O: Nanwan, Kenting, Taiwan (21°57΄30"N, 120°45΄50"E).
FIGURE 3 in Pattern of stigma numbers as a taxonomic character in some didemnid ascidians (Aplousobranchia: Didemnidae)
FIGURE 3. Thoraxes of Trididemnum clinides (A, right side view) and Trididemnum nubilum (B, left side view). The stigma patterns are <9, 8, 8> in A and <5, 5, 4> in B. Numbers indicate the stigmata in the first rows. en, endostyle; es, esophagus. Scale bars, 0.1 mm.
Data related to Ciona spp. and ascidians as bioindicator organisms for evaluating effects of endocrine disrupting chemicals: A discussion paper
<p>This dataset is related to "Ciona spp. and ascidians as bioindicator organisms for evaluating effects of endocrine disrupting chemicals: A discussion paper" PMID: <strong>37708617</strong> doi: 10.1016/j.marenvres.2023.106170. Epub 2023 Sep 9.</p>
Supplementary information provided with Murray et al.: Discovery of an Antarctic ascidian-associated uncultivated Verrucomicrobia with antimelanoma palmerolide biosynthetic potential
<p><span>The Antarctic marine ecosystem harbors a wealth of biological and chemical innovation that has risen in concert over millennia since the isolation of the continent and formation of the Antarctic circumpolar current. Scientific inquiry into the novelty of marine natural products produced by Antarctic benthic invertebrates led to the discovery of a bioactive macrolide, palmerolide A, that has specific activity against melanoma and holds considerable promise as an anticancer therapeutic. While this compound was isolated from the Antarctic ascidian <i>Synoicum adareanum</i>, its biosynthesis has since been hypothesized to be microbially mediated, given structural similarities to microbially-produced hybrid non-ribosomal peptide-polyketide macrolides. Here, we describe a metagenome-enabled investigation aimed at identifying the biosynthetic gene cluster (BGC) and palmerolide A-producing organism. A 74 Kbp candidate BGC encoding the multi-modular enzymatic machinery (hybrid Type I-<i>trans</i>-AT polyketide synthase-non-ribosomal peptide synthetase and tailoring functional domains) was identified and found to harbor key features predicted as necessary for palmerolide A biosynthesis. Surveys of ascidian microbiome samples targeting the candidate BGC revealed a high correlation between palmerolide-gene targets and a single 16S rRNA gene variant (R=0.83 – 0.99). Through repeated rounds of metagenome sequencing followed by binning contigs into metagenome-assembled genomes, we were able to retrieve a near-complete genome (10 contigs) of the BGC-producing organism, a novel verrucomicrobium within the <i>Opitutaceae</i> family that we propose here as <i>Candidatus</i> Synoicihabitans palmerolidicus. The refined genome assembly harbors five highly similar BGC copies, along with structural and functional features that shed light on the host-associated nature of this unique bacterium.</span></p>
FIGURE 7. Culeolus likae. A in Abyssal ascidians (Chordata, Tunicata) from the Weddell Sea, Antarctica, including a new Styela species and stomach content identifications
FIGURE 7. Culeolus likae. A: individual; B: vesicles of the tunic; C: internal anatomy (without branchial sac).
FIGURE 4 in Abyssal ascidians (Chordata, Tunicata) from the Weddell Sea, Antarctica, including a new Styela species and stomach content identifications
FIGURE 4. Styela andeepensis sp. nov.. A: individual attached to the tunic of Culeolus suhmi; B: scheme showing internal anatomy (without branchial sac).
FIGURE 1 in Abyssal ascidians (Chordata, Tunicata) from the Weddell Sea, Antarctica, including a new Styela species and stomach content identifications
FIGURE 1. Study area with the locations where the samples were collected (stations 7, 9, 13, 14, 16).
FIGURE 6. Culeolus anonymus. A in Abyssal ascidians (Chordata, Tunicata) from the Weddell Sea, Antarctica, including a new Styela species and stomach content identifications
FIGURE 6. Culeolus anonymus. A: individual; B: vesicles of the tunic; C: internal anatomy (without branchial sac).
FIGURE 8. Oligotrema lyra. A in Abyssal ascidians (Chordata, Tunicata) from the Weddell Sea, Antarctica, including a new Styela species and stomach content identifications
FIGURE 8. Oligotrema lyra. A: individual; B: papillae and oral lobes, pharynx perforations and muscle bands.
FIGURE 3. Corynascidia suhmi. A in Abyssal ascidians (Chordata, Tunicata) from the Weddell Sea, Antarctica, including a new Styela species and stomach content identifications
FIGURE 3. Corynascidia suhmi. A: individual; B: pre-pharyngeal band around dorsal tubercle; C: branchial sac.
FIGURE 5. Culeolus suhmi. A in Abyssal ascidians (Chordata, Tunicata) from the Weddell Sea, Antarctica, including a new Styela species and stomach content identifications
FIGURE 5. Culeolus suhmi. A: individual showing attached ascidian epibiont; B: postero-ventral papillae and vesicles of the tunic; C: internal anatomy (without branchial sac).
FIGURE 7 in A novel symbiotic relationship between ascidians and a new tunic-boring polychaete (Annelida: Spionidae: Polydora)
FIGURE 7. Results of plate assay (A) and zymographic analysis (B) for cellulase activity of Polydora tunicola sp. nov. Haloes (A: destained areas) and destained bands (B: arrowheads) indicate the cellulose decomposition (exhibition of cellulase activity). PC = positive control (crystalline style of a brackish water clam Corbicula japonica), NC = negative control.
FIGURE 6 in A novel symbiotic relationship between ascidians and a new tunic-boring polychaete (Annelida: Spionidae: Polydora)
FIGURE 6. Maximum likelihood tree inferred from concatenated sequences of nuclear 18S and 28S and mitochondrial 16S rRNA gene sequences of Polydora species obtained in this study and from DDBJ/EMBL/GenBank database (Table 1). The gene sequences obtained in this study are highlighted in boldface. SH-aLRT/approximate Bayes support/ultrafast bootstrap support values of ≥80%/≥0.95/≥95%, respectively, are given beside the respective nodes. Nodes with red circles indicate triple high support values of SH-aLRT ≥ 80, approximate Bayes support ≥ 0.95, and ultrafast bootstrap support ≥ 95. The scale bar represents the number of substitutions per site. Sequences of Dipolydora species are used for outgroup rooting. The symbols at the left of the species names indicate the lifestyle based on the available information (Table 1).
FIGURE 5 in A novel symbiotic relationship between ascidians and a new tunic-boring polychaete (Annelida: Spionidae: Polydora)
FIGURE 5. Micro-CT images of the host ascidian. A: three-dimensional (3D) reconstructed image of three U-shaped burrows of Polydora tunicola sp. nov. B: two-dimensional reconstructed images of three U-shaped burrows of Polydora tunicola sp. nov. extracted from tomographic data. Arrowheads of figures A and B indicate the apertures of the burrows. C–E: Cross-sectional image of the host. Arrowheads indicate the boreholes of Polydora tunicola sp. nov. in the ascidian tunic. Scale bars = 10 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)
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.