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398 results for “Claw”
Get a grip - evolution of claw shape in relation to microhabitat use in intertidal arthropods (Acari, Oribatida)
<p>Claws may be the most common biological attachment devices in animals but relatively few studies have examined the ecological and evolutionary significance of their morphology. We performed the first geometric morphometric investigation of arthropod claws ever using 15 intertidal oribatid mite species from two different families living in three different habitat types to determine if claw shape is correlated with ecology. Our results show that species living on rocky shores show remarkably high and strongly curved claws while species from mangrove habitats show significantly lower and less curved claws. Euryoecious species being able to dwell in a wide range of habitats show an intermediate claw type. These results indicate a strong relationship between claw shape and microhabitat whereas the best predictors of microhabitat use seem to be claw height and curvature. Claw length varied to some degree between the species but without any noticeable ecological pattern. A comparison with terrestrial and freshwater aquatic oribatid mite species, on the other hand, confirms that their claws are only half as long as that of intertidal mites and it is suggested that tidal flooding and wave action strongly selects for long claws. The present results indicate that claw morphology may play an important role in niche separation and hence demonstrate the importance of ecomorphological studies, especially in the microarthropod group which occupies a vast array of microhabitats.</p>
A Very Old Dinosaur Claw
29 photos run through COLMAP for SFM stuff, then OpenMVS for everything else. Post processing and texture work done in Blender & GIMP. Even has a glossy claw. Why not? Edit: Apparently this is actually a Mosasaur Tooth, not a dinosaur claw. The more you know! Source: Objaverse 1.0 / Sketchfab
CityPlace Schooner Claw Hammer
This is a laser scanned model of a hammer found in 2015 in downtown Toronto by Archaeological Services, Inc. during its excavation of the CityPlace schooner, an early 19th-century merchant vessel. It was discovered under the hull towards the stern of the wreck on its starboard side. The wreck is currently located at the Fort York National Historic Site and is the subject of an archaeological study by scholars from the Nautical Archaeology Program at Texas A&M University. Source: Objaverse 1.0 / Sketchfab
Allosaurus Finger Claw
Allosaurus fragilis was a species of theropod dinosaur known from the Jurassic of modern-day North America. All species of Allosaurus were large carnivores at 2.5 meters tall and nearly 9 meters long. Allosaurus fragilis is one of the most represented dinosaurs in the Morrison Formation, leading paleontologists to hypothesize that Allosaurus may have hunted in groups. One of the most popular Allosaurus specimens is Big Al, a sub-adult with numerous pathologies, which is on display in the University of Wyoming Geological Museum. This specimen shows a finger claw. Source: Objaverse 1.0 / Sketchfab
Roman Claw Hammer
"a Gem of Good Designing -[Eric Sloane](https://en.wikipedia.org/wiki/Eric_Sloane), [*Museum of Early American Tools*](https://www.amazon.com/Museum-Early-American-Tools-Americana/dp/0486425606/ref=sr_1_1?crid=1MDB8783EQVPS&dchild=1&keywords=museum+of+early+american+tools&qid=1613590281&s=books&sprefix=museum+of+early%2Cstripbooks%2C170&sr=1-1) Modeled from Eric Sloane's [*Museum of Early American Tools*](https://www.amazon.com/Museum-Early-American-Tools-Americana/dp/0486425606/ref=sr_1_1?crid=1MDB8783EQVPS&dchild=1&keywords=museum+of+early+american+tools&qid=1613590281&s=books&sprefix=museum+of+early%2Cstripbooks%2C170&sr=1-1). Textured with [CC0 Textures](https://cc0textures.com) assets. Made with [Blender](https://blender.org). Source: Objaverse 1.0 / Sketchfab
CRABS CLAW-independent floral nectary development in Penstemon barbatus
<p>Data and Scripts for the "CRABS CLAW-independent floral nectary development in Penstemon barbatus" manuscript.</p> <p> </p> <p>Scripts:</p> <ol> <li>fastp.sh - filter and quality trim reads using fastp on all samples</li> <li>1ribo_detect.sh - detect and filter rRNA. Example script for 1 sample.</li> <li>gffread.sh - convert P. barbatus genome annotation GFF to a GTF for use in STAR</li> <li>star_initalize.sh - initalize STAR for the P. barbatus genome</li> <li>1star_ribo.sh - Example script for aligning reads from 1 sample to the genome.</li> <li>htseq_ribo.sh - counting reads for each sample using HTseq</li> <li>deseq2_code.R - R script for running the transcriptome tissue comparisons in DEseq2 with the output from HTseq.</li> <li>deseq_PCA.R - R script for the generation of the PCA plots for the samples. To be used in conjuction with the deseq2_code.R script.</li> <li>20230321_topGO_script.R - R script for Gene Ontology analyses in topGO.</li> <li>area_perimeter_cor.R - R script for vasculature ANOVAs.</li> </ol> <p> </p> <p>Data:</p> <ol> <li>Genome files <ul> <li>4_LG_2022_maker.all.maker.proteins.fasta - protein sequences for all genes in the P. barbatus genome in Wessinger et al. 2023</li> <li>4_LG_2022_maker.all.maker.noseq.gff - GFF file for all genes in the P. barbatus genome in Wessinger et al. 2023</li> </ul> </li> <li>HTseq output trimmed to only the counts (excludes other log information) - trimmed_htseq_35404342.txt</li> <li>DEseq2 output <br> <ul> <li>Early stage <ul> <li>barb_early_nect_nonect_FDR0.01_LFC0.csv</li> <li>barb_early_nect_nonect_FDR0.01_LFC0.annotated.csv</li> </ul> </li> <li>Late stage <ul> <li>barb_late_nect_nonect_FDR0.01_LFC0.csv</li> <li>barb_late_nect_nonect_FDR0.01_LFC0.annotated.csv</li> </ul> </li> <li>Nectar removal <ul> <li>barb_stage5_6_FDR0.01_LFC0.csv</li> <li>barb_stage5_6_FDR0.01_LFC0.annotated.csv</li> </ul> </li> </ul> </li> <li>Orthofinder output - N0.tsv</li> <li>Vasculature raw data - 20231025_bud_measurements_pbarb.csv</li> <li>Archive_Images directory - contains raw section images stained with either Alcian Blue & Safranin O or </li> </ol>
Fig. 11 in New Findings Of White Clawed Crayfish, Austropotamobius Pallipes (Decapoda, Astacidae), And Peculiarities Of Its Spatial Distribution In Neretvica (Bosnia And Herzegovina)
Fig. 11. Size structure of cray fish by locations.
Fig. 10 in New Findings Of White Clawed Crayfish, Austropotamobius Pallipes (Decapoda, Astacidae), And Peculiarities Of Its Spatial Distribution In Neretvica (Bosnia And Herzegovina)
Fig. 10. Isobath maps (depth, m), isotach map (velocity, m/s) — autumn.
Fig. 7 in New Findings Of White Clawed Crayfish, Austropotamobius Pallipes (Decapoda, Astacidae), And Peculiarities Of Its Spatial Distribution In Neretvica (Bosnia And Herzegovina)
Fig. 7. Typical crayfish habitats in the Gorovnik.
Fig. 1 in New Findings Of White Clawed Crayfish, Austropotamobius Pallipes (Decapoda, Astacidae), And Peculiarities Of Its Spatial Distribution In Neretvica (Bosnia And Herzegovina)
Fig. 1. Map of the research area.
Fig. 9 in New Findings Of White Clawed Crayfish, Austropotamobius Pallipes (Decapoda, Astacidae), And Peculiarities Of Its Spatial Distribution In Neretvica (Bosnia And Herzegovina)
Fig. 9. Lowest habitat of the crayfish in the Neretvica.
Fig. 8 in New Findings Of White Clawed Crayfish, Austropotamobius Pallipes (Decapoda, Astacidae), And Peculiarities Of Its Spatial Distribution In Neretvica (Bosnia And Herzegovina)
Fig. 8. Isobath map (depth, m) and isotach map (velocity, m/s) — autumn 2017.
Fig. 2 in New Findings Of White Clawed Crayfish, Austropotamobius Pallipes (Decapoda, Astacidae), And Peculiarities Of Its Spatial Distribution In Neretvica (Bosnia And Herzegovina)
Fig. 2. General view of the confluence of the Prolaz tributary into the Neretvica.
Fig. 1 in The Thick-Clawed Crayfish, Astacus Pachypus (Crustacea, Decapoda, Astacidae), In Ukraine: Karyotype, Allozymes And Morphological Parameters
Fig. 1. Locations of samples of four crayfish species in Ukraine.
Figure 4 in A segmented and clawed male foreleg in a newly described genus and species of eumaeine butterfly (Lepidoptera: Lycaenidae)
Figure 4. Distribution of Grishinata penny in Ecuador and Peru.
Data for: New insights into Xenopus sex chromosome genomics from the Marsabit clawed frog, X. borealis
<p><span>In many groups, sex chromosomes change frequently but the drivers of their rapid evolution are varied and often poorly characterized. With an aim of further understanding sex chromosome turnover, we investigated the polymorphic sex chromosomes of the Marsabit clawed frog, <em>Xenopus borealis,</em> using genomic data and a new chromosome-scale genome assembly. We confirmed previous findings that 54.1 Mb of chromosome 8L is sex-linked in animals from east Kenya and a lab strain, but most (or all) of this region is not sex-linked in natural populations from west Kenya. Previous work suggests possible degeneration of the Z chromosomes in the east population because many sex-linked transcripts of this female heterogametic population have female-biased expression, and we therefore expected this chromosome to not be present in the west population. In contrast, our simulations support a model where the sex-linked portion of the Z chromosome from the east acquired autosomal segregation in the west, and where the W chromosome from the east was lost in the west. These recent changes are consistent with the hot potato model, wherein sex chromosome turnover is favoured by natural selection if it purges a (minimally) degenerate sex-specific sex chromosome, but counterintuitively suggest natural selection failed to purge a Z chromosome that has signs of more advanced and possibly more ancient regulatory degeneration. These findings highlight complex evolutionary dynamics of young, rapidly evolving <em>Xenopus</em> sex chromosomes, and set the stage for mechanistic work aimed at pinpointing additional sex-determining genes in this group.</span></p>
Flight dataset for perching with soft claw
<p><span>This document shows the dataset of the flight experiments for perching experimentation with a soft claw attached under the robotic bird. In the dataset log files, information on the position, orientation, input signals, and velocities of the robot during the flights were recorded.</span><span> </span></p>
Data from: Lower jaw modularity in the African Clawed Frog (Xenopus laevis) and Fire Salamander (Salamandra salamandra gigliolii)
<p>Modularity describes the degree to which the components of complex phenotypes vary semi-autonomously due to developmental, genetic, and functional correlations. This is a key feature underlying the potential for evolvability, as it can allow individual components to respond to different selective pressures semi-independently. The vertebrate lower jaw has become a model anatomical system for understanding modularity, but to date, most of this work has focused on the mandible of mammals and other amniotes. In contrast, modularity in the mandible of lissamphibians has been less well-studied. Here, we used geometric morphometrics to quantify the static (intraspecific) modularity patterns in <em>Xenopus laevis</em> and <em>Salamandra salamandra gigliolii.</em> We tested developmental and functional hypotheses of modularity and demonstrate that both species exhibit significant modularity. Functional modularity was supported in <em>Xenopus</em>, yet the lack of definitive support for both the developmental and functional hypotheses in <em>Salamandra</em> suggests influences on modularity are much more complex. Allometry has a small yet significant impact on lower jaw shape in both taxa and sex has a significant effect on shape in <em>Xenopus</em>. The high modularity seen in both species mimics the results of other studies on the amphibian cranium, suggesting that modularity is a ubiquitous feature of the tetrapod jaw.</p>
Tiger Claw
Knife "Tiger Claw". It was used in the 18th century in India.   Source: Objaverse 1.0 / Sketchfab
Get a grip - evolution of claw shape in relation to microhabitat use in intertidal arthropods (Acari, Oribatida)
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