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440 results for “flatworm”
Evolution of sex allocation plasticity in a hermaphroditic flatworm genus
<p>Sex allocation theory in simultaneous hermaphrodites predicts that optimal sex allocation is influenced by local sperm competition, which occurs when related sperm compete to fertilize a given set of eggs. Different factors, including the mating strategy and the ability to self-fertilize, are predicted to affect local sperm competition and hence the optimal SA. Moreover, since the local sperm competition experienced by an individual can vary temporally and spatially, this can favour the evolution of sex allocation plasticity. Here, using seven species of the free-living flatworm genus <em>Macrostomum</em>, we document interspecific variation in sex allocation, but neither their mating strategy nor their ability to self-fertilize significantly predicted sex allocation among these species. Since we also found interspecific variation in sex allocation plasticity, we further <span>estimated standardized effect sizes for plasticity in response to i) the presence of mating partners </span>(i.e. in isolation vs. with partners) <span>and ii) the strength of </span>local sperm competition (i.e. in small vs. large groups). We found that self-fertilization predicted sex allocation plasticity with respect to the presence of <span>mating partners, with </span>plasticity<span> being lower for self-fertilizing species. Finally, we showed that interspecific variation in </span>sex allocation is higher than intraspecific variation due to sex allocation plasticity. Our study suggests that both sex allocation and sex allocation plasticity are evolutionarily labile, with self-fertilization predicting the latter in <em>Macrostomum</em>.</p>
Data for: Mating strategy predicts gene presence/absence patterns in a genus of simultaneously hermaphroditic flatworms
<p>This repository contains a record of analysis scripts and similarity score data used for the analyses presented in the manuscript.</p> <p>Some of the R scripts depend on supplementary tables associated with the manuscript.</p> <p>A preprint of the manuscript is available at: <a href="https://www.biorxiv.org/content/10.1101/2022.04.25.489193v2">https://www.biorxiv.org/content/10.1101/2022.04.25.489193v2</a></p>
Fig. 4 in Reproductive strategies of the parasitic flatworm Thaparocleidus vistulensis (Siwak, 1932) (Platyhelminthes, Monogenea) infecting the European catfish Silurus glanis Linnaeus, 1758
Fig. 4. Average hatching rates of T. vistulensis larvae.
Fig. 5 in Reproductive strategies of the parasitic flatworm Thaparocleidus vistulensis (Siwak, 1932) (Platyhelminthes, Monogenea) infecting the European catfish Silurus glanis Linnaeus, 1758
Fig. 5. Average in vitro survival rates of T. vistulensis at different life stages.
FIGURE 7 Girardia tigrina from Liguria. A in The invasive alien freshwater FLatworm Girardia tigrina (Girard, 1850) (Platyhelminthes, Tricladida) in Western Europe: new insights into its morphology, karyology and reproductive biology
FIGURE 7 Girardia tigrina from Liguria. A. Metaphasic plate; B. Karyogram.
Data from: Phylogenetic history of the acquisition of molluscan hosts in acotylean flatworms
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Data from: Contrasting the form and strength of pre- and postcopulatory sexual selection in a flatworm
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Spontaneous ectopic head formation enables reversal of the body axis polarity in microscopic flatworms
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Evolution of sex allocation plasticity in a hermaphroditic flatworm genus
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A phylogenomic approach to resolving interrelationships of polyclad flatworms, with implications for life history evolution
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Evaluation of various RNA-seq approaches for identification of outrons in the flatworm Opisthorchis felineus
<p>As a result of spliced leader trans-splicing (SLTS), the original 5'-end (outron) of the transcripts is replaced by a short spliced leader sequence, donated from a specialized SL RNA. SLTS is involved in the RNA processing of more than half of <em>O. felineus</em> genes, making it hard to determine the structure of outrons and bona fide transcription start sites of the corresponding genes and operons, being based solely on mRNA-seq data. In the study, associated with the current dataset, we evaluated four experimental approaches for identifying outrons in <em>O. felineus</em> using low-depth massive parallel sequencing. Two of them were developed by us for targeted sequencing of already processed outrons. The first (<strong>SLi-RT</strong>) is based on a sequence-specific reverse transcription from the SL intron toward the 5'-end of the Y-branched outron. The second (<strong>SLi-BC</strong>) utilizes outron hybridization with an immobilized single-stranded DNA probe complementary to the SL intron. Additionally, two approaches to the sequencing of rRNA-depleted total RNA, the commercially available Zymo-Seq RiboFree kit (<strong>ZymoSeq</strong>) and digestion by Terminator<sup>TM</sup> 5´-Phosphate-Dependent Exonuclease (<strong>TermExo</strong>), were used to assess the identification of a wider range of transcripts compared to mRNA-seq. The dataset contains the raw paired-end data in FASTQ format for the corresponding RNA-seq libraries sequenced at a low depth on Illumina MiSeq platform.</p> <p> </p>
FIGURE 14 in Five new species of cotylean flatworms (Platyhelminthes: Polycladida: Cotylea) from Oaxaca, southern Mexican Pacific
FIGURE 14. Thysanozoon estacahuitensis sp. nov. A–B,F–H (holotype UMAR PLAT-036), C–E (paratype UMAR PLAT- 040). A–B. Specimen preserved in alcohol; C, D–E. Specimen stained in Mayer´s carmalum and cleared in methyl salicylate; D. Tentacular eyes; E. Cerebral eyes; F. Male and female reproductive systems; G. Dorsal papillae, in whole mount; H. Dorsal papillae, in sagittal histological sections. Structures: ce= cerebral eyes, fg= female gonopore, mg= male gonopore, pp= penis papilla, s= sucker, te= te= tentacular eyes. Scaling bar of A–C = 5 mm.
FIGURE 3 in Five new species of cotylean flatworms (Platyhelminthes: Polycladida: Cotylea) from Oaxaca, southern Mexican Pacific
FIGURE 3. Boninia oaxaquensis sp. nov. A–B (paratype UMAR PLAT-019). A. Diagrammatic representation complete specimen; B. Diagrammatic representation of the male and female reproductive systems, in whole mount. Structures: b= brain, cg= cement gland, fg= female gonopore, lv= Lang´s vesicle, m= mouth, me= marginal eyes, mg= male gonopore, mt= marginal tentacle, p= pharynx, po= prostatoid organs, s= sucker, spv= spermiducal vesicle, u= uterus.
FIGURE 2 in Five new species of cotylean flatworms (Platyhelminthes: Polycladida: Cotylea) from Oaxaca, southern Mexican Pacific
FIGURE 2. Boninia oaxaquensis sp. nov. A,C,D–F and H (paratype UMAR PLAT-019); B (paratype UMAR PLAT-023), G and I (paratype UMAR PLAT-024). A–B. Specimen preserved in alcohol; C–F, H. Specimen stained in Gomori´s trichromic and cleared in methyl salicylate; D. Anterior region of the body; E. Brain; F. Pharynx region; H. Female reproductive system, in whole mount. G. Prostatoid organs; I. Male and female reproductive system, in frontal histological section. Structures: b= brain, ce= cerebral eyes, cg= cement glands, fg= female gonopore, lv= Lang´s vesicle, me= marginal eyes, mg= male gonopore, mt= marginal tentacles, p= pharynx, po= prostatoid organs, u= uterus. Scaling bar of the figure A–C= 1 mm.
FIGURE 5 in Five new species of cotylean flatworms (Platyhelminthes: Polycladida: Cotylea) from Oaxaca, southern Mexican Pacific
FIGURE 5. Pericelis sigmeri sp. nov. A, C–D, F–J (paratype UMAR PLAT-026); B–E (paratype UMAR PLAT-027). A–B. Specimen in vivo; C. Specimen preserved in alcohol; D, F–J. Specimen stained in Gomori´s trichromic and cleared in methyl salicylate; E, G. Anterior region of the body; F, J. Male and female reproductive systems; H. Brain; I. Pharynx region, in whole mount. Structures: ce= cerebral eyes, gcm= globuli cell masses, me= marginal eyes, p= pharynx, pe= pre-cerebral eyes, pp= penis papilla, pt= pseudotentacles, sv= seminal vesicle, ud= uterine ducts, uv= uterine vesicle. Scaling bar of the figure A-B = 5 mm.
FIGURE 3. Anocellidus profundus n in First description of deepsea polyclad flatworms from the North Pacific: Anocellidus n. gen. profundus n. sp. (Anocellidae, n. fam.) and Oligocladus voightae n. sp. (Euryleptidae)
FIGURE 3. Anocellidus profundus n. sp.; photomicrographs. A. Sagittal histological section through the anterior end. Nerve cords can be seen extending from the brain to the sensory organ. Scale bar = 250 µm. B. Sagittal histological section, showing reproductive and digestive structures. Scale bar = 1 mm.
FIGURE 6 in First description of deepsea polyclad flatworms from the North Pacific: Anocellidus n. gen. profundus n. sp. (Anocellidae, n. fam.) and Oligocladus voightae n. sp. (Euryleptidae)
FIGURE 6. Whole mount of Oligocladus voightae n. sp.; photomicrographs. A. Anterior end, showing tentacles (arrow heads), massive pharynx, and female reproductive structures. Scale bar = 1 mm. B. Higher magnification of anterior end. Arrow heads indicate putative pores of vesicular channel system. Note, channels are only found on one side of the animal. Scale bar = 1 mm.
FIGURE 7 in First description of deepsea polyclad flatworms from the North Pacific: Anocellidus n. gen. profundus n. sp. (Anocellidae, n. fam.) and Oligocladus voightae n. sp. (Euryleptidae)
FIGURE 7. Sagittal section of Oligocladus voightae n. sp., showing details of intestine and characteristic anal pore (arrow). Scale bar = 1 mm.
FIGURE 2 in First description of deepsea polyclad flatworms from the North Pacific: Anocellidus n. gen. profundus n. sp. (Anocellidae, n. fam.) and Oligocladus voightae n. sp. (Euryleptidae)
FIGURE 2. Cleared whole mount of Anocellidus profundus n. sp., showing sensory organ, pharynx, and structures of the male and female reproductive complexes. Scale bar = 1 mm.
FIGURE 5 in First description of deepsea polyclad flatworms from the North Pacific: Anocellidus n. gen. profundus n. sp. (Anocellidae, n. fam.) and Oligocladus voightae n. sp. (Euryleptidae)
FIGURE 5. Schematic representation of the male and female reproductive structures of Anocellidus profundus n. sp. Scale bar = 250 µm.
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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.