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161 results for “octopus”
Data of the study of Maternal temperature stress modulates acclimation and thermal biology in Octopus maya (Cephalopoda: Octopodidae) juvenile progeny
<p>These data shows the effects of temperature and exposure time on octopus juveniles obtained from thermal-stressed (30°C) and non-stressed (24°C) females when exposed to optimal (25°C) and high temperatures (30°C) for 20 and 30 days, respectively. Data of survival, and oxygen consumption (MR) were obtained, also in routine (RMR) and resting conditions (SMR). The high metabolic rate (HMR) was used to obtain the thermal metabolic scope (TMS) That was defined as: TMS = HMR - SMR<br> Data on the antioxidant defense enzymes and radical oxygen species (ROS) were used to evaluate if transgenerational effect of temperature provoked changes in the hability of juveniles to neutralize ROS. </p>
Octopus vulgaris, Sepia officinalis, Loligo vulgaris and Illex coindetii early life phases Light Sheet Fluerescence Microscopy (LSFM) 3D scans.
<p>Acronyms: OV: <em>Octopus vulgaris</em>, SO: <em>Sepia officinalis</em>, LV: <em>Loligo vulgaris</em>, IC: <em>Illex coindetii</em>, DPH: Days Post-Hatching.</p> <p>Two detection objectives were used, depending on sample size, a 4x/0.28 NA Olympus XLFLUOR4x/340 objective (0, 5, 10, 19 DPH <em>Octopus vulgaris</em> individuals,<em> Loligo vulgaris</em> and<em> Illex coindetii</em>) and a Nikon 10x/0.5 NA CFI Plan Apochromat 10xC Glyc (Rest of the samples). For illumination, two 4x/0.95 NA Nikon CFI Plan Apo Lambda 4x were used when using the 10x detection objective and two 4x/0.13 NA Nikon Plan Fluor illumination objectives were used when using the 4x detection objective. </p> <p>Microscope: MuVi SPIM (Luxendo), LCS SPIM (Luxendo, only <em>Sepia officinalis</em> and 60 DPH <em>Octopus vulgaris</em> individuals).</p> <p>All the data has been scaled in order to reduce file sizes. Full size stacks can be requested to dgvilar@gmail.com.</p>
Raw data of Octopus maya embryos along the development: wet weight, oxygen consumption, antioxidant defence mechanisms and oxidative damage.
<p>Raw data on oxygen consumption and antioxidant defense mechanisms of Octopus maya embryos were maintained in laboratory conditions at 24°C. Those data were obtained during the embryo development. The antioxidant defense mechanisms and oxidant damage were also obtained from the ovary and the un-spawned eggs, allowing to us known how is the oxidant damage translated from the females to embryos in this octopus species. </p>
Multiple Sequence Alignments for Octopus bocki
<p><span>Multiple sequence alignments were created in MEGA11: Molecular Evolutionary Genetics Analysis version 11 (<em>Whelan and Goldman, 2001</em>)</span><span> using Muscle default parameters (UPGMA cluster method with -2.9 gap open and 0 gap extension penalties)</span></p> <p><em><span>Whelan, S. and Goldman, N. (2001). A general empirical model of protein evolution derived from multiple protein families using a maximum-likelihood approach. Molecular Biology and Evolution 18:691-699.</span></em></p>
Gene Trees for Octopus bocki ANC neuron markers
<p>The evolutionary history was inferred by using the Maximum Likelihood method and Whelan And Goldman model [1]. The trees with the highest log likelihood are shown. The percentage of trees in which the associated taxa clustered together is shown next to the branches. Initial tree(s) for the heuristic search were obtained automatically by applying Neighbor-Join and BioNJ algorithms to a matrix of pairwise distances estimated using the JTT model, and then selecting the topology with superior log likelihood value. The trees are drawn to scale, with branch lengths measured in the number of substitutions per site. Evolutionary analyses were conducted in MEGA11 [2]</p> <p>1. Whelan, S. and Goldman, N. (2001). A general empirical model of protein evolution derived from multiple protein families using a maximum-likelihood approach. Molecular Biology and Evolution 18:691-699.<br>2. Tamura K., Stecher G., and Kumar S. (2021). MEGA 11: Molecular Evolutionary Genetics Analysis Version 11. Molecular Biology and Evolution https://doi.org/10.1093/molbev/msab120.</p>
Fig. 1 in Linking phenotypic to genotypic metacestodes from Octopus maya of the Yucatan Peninsula
Fig. 1. Sampling localities where specimens of Octopus maya were collected in Yucatan, Mexico.
[OBSOLETE] OCTOPUS Database v.2.2: The CRN Denudation UOW (in preparation) collection [2024]
<p><strong>Database of unpublished cosmogenic Be-10 and Al-26 concentrations from modern river sediment and basin-averaged denudation rates inferred from these data.</strong> Ancillary spatial data includes: sample site location (point), basin outline (polygon), digital elevation model (raster), D8 flow direction and flow accumulation grids (raster), topographic gradient (raster), atmospheric pressure (raster), and cosmogenic nuclide production scaling factor and topographic shielding grids (raster). The vector spatial data uses the WGS84/Pseudo-Mercator (EPSG: 3857) projected coordinate reference system. The raster data uses the WGS86/UTM projected coordinate reference system, UTM zones depending on the extent and location of each data package. Sample metadata is comprehensive and includes all necessary information and input files for the recalculation of denudation rates using the CAIRN model (https://github.com/LSDtopotools/LSDTopoTools_CRNBasinwide). All denudation rates were recalculated and harmonised using CAIRN. The extent of the data covers Australia.</p>
[OBSOLETE] OCTOPUS Database v.2.2: The CRN Denudation XXL (large basins) collection [2024]
<p><strong>Database of published cosmogenic Be-10 and Al-26 concentrations from modern river sediment and basin-averaged denudation rates inferred from these data.</strong> Ancillary spatial data includes: sample site location (point), basin outline (polygon). The vector spatial data uses the WGS84/Pseudo-Mercator (EPSG: 3857) projected coordinate reference system.</p>
Can octopus embryos and juveniles contend with heatwaves? [Research data]
<p>Research data supporting the paper "Can octopus embryos and juveniles contend with heatwaves?" to be submitted to <em>...</em>. This dataset includes comprehensive information on the physiological and biochemical responses of <em>Octopus maya</em> to elevated temperatures. Data cover morphometric measurements, routine oxygen consumption rates, enzyme activities, and antioxidant defense markers in embryos, as well as the prolonged effects on juvenile octopuses, including biometry, respiratory metabolism, and mitochondrial function (measured by high-resolution respirometry). This dataset provides essential insights into the thermal resilience of <em>O. maya</em> under heat wave conditions</p> <p> </p>
Octopus bimaculoides visually-evoked prey capture
<p>Octopus limb hyper-redundancy complicates traditional motor control system theory by its extensive sensory inputs, subsequent decision making and arm coordination. Octopus are thought to reduce flexibility control complexity by relying on highly stereotypical motor primitives (e.g. reaching and crawling) and multi-level processes to coordinate movement utilizing extensive peripheral nervous system (PNS) processing. Division of labor along the anterior-posterior axis and limb- specialization of the four anterior arms in T-maze food retrieval further simplify control. Yet, specific arm recruitment and coordination during visually guided reaching behavior remains poorly understood. Here, we investigated visually triggered <em>Octopus bimaculoides</em> hunting capabilities by eliciting and examining prey-specific arm recruitment. When striking crabs, octopus preferred synchronous arm recruitment while sequential arm recruitment with a characteristic swaying movement is employed for shrimp. Such behavioral selection aligns with specific prey escape strategies and the octopus' flexible arm biomechanical constraints. Although side bias existed, we found significant bilateral symmetry, with one side being functionally a mirror of the other rather than anterior arm use being functionally equal and differing to posterior arm use. Among arms, the second limb is unequivocally dominant for goal-directed monocularly driven prey capture. While the eight arms share gross anatomy and are considered equipotential, such arm specialization for specific actions could reflect different degrees of specialization in organismal structures. Finally, we quantitatively show, corroborating earlier observations, that octopus employ a dimension reduction strategy by actively deciding to recruit adjacent arms over other available arms during either sequential or synchronous visually triggered prey attack.</p>
Calcium imaging data from: Functional organization of visual responses in the octopus optic lobe
<p>Cephalopods are highly visual animals with camera-type eyes, large brains, and a rich repertoire of visually guided behaviors. However, the cephalopod brain evolved independently from that of other highly visual species, such as vertebrates, and therefore the neural circuits that process sensory information are profoundly different. It is largely unknown how their powerful but unique visual system functions, since there have been no direct neural measurements of visual responses in the cephalopod brain. In this study, we used two-photon calcium imaging to record visually evoked responses in the primary visual processing center of the octopus central brain, the optic lobe, to determine how basic features of the visual scene are represented and organized. We found spatially localized receptive fields for light (ON) and dark (OFF) stimuli, which were retinotopically organized across the optic lobe, demonstrating a hallmark of visual system organization shared across many species. Examination of these responses revealed transformations of the visual representation across the layers of the optic lobe, including the emergence of the OFF pathway and increased size selectivity. We also identified asymmetries in the spatial processing of ON and OFF stimuli, which suggest unique circuit mechanisms for form processing that may have evolved to suit the specific demands of processing an underwater visual scene. This study provides insight into the neural processing and functional organization of the octopus visual system, highlighting both shared and unique aspects, and lays a foundation for future studies of the neural circuits that mediate visual processing and behavior in cephalopods.</p>
Survey to help identify whether Octopus might help researchers produce high quality, open research
<h2>Survey to help identify whether Octopus might help researchers produce high quality, open research</h2><p>In order to complement in-depth, but necessarily small sample size, interviews, an online survey allowed us to reach a broader population to gain some quantitative data on the current research culture and barriers to best practice, as well as whether the Octopus platform might help overcome them.</p><p>The finalised survey was implemented on EUSurvey. It is a fully open source online survey platform developed and administered by the European Commission, adhering to relevant privacy regulations (e.g. the General Data Protection Regulation (GDPR)).</p><p>The survey was open from 17 January to 5 February 2023.</p><p>Details on the implementation of this survey is published on Octopus.</p>
Crochet Octopus in The Process of Heel Lance in Neonates
ClinicalTrials.gov study NCT04560374. IPD Sharing: NO. Countries: 1. Publications: 44.
Calcium imaging data from: Functional organization of visual responses in the octopus optic lobe
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Paraphlomis octopus (Lamiaceae), a new species from Southern China
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Octopus bimaculoides visually-evoked prey capture
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Impact of short- and long-term exposure to elevated seawater pCO2 on metabolic rate and hypoxia tolerance in Octopus rubescens
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Diverse musculature layers in three species of octopus support precise motor control yet lack smooth muscle.
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Using light traps to assess larval fish and octopus paralarvae diversity and ontogenetic structure around Santa Catalina Island, CA
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FIGURE 2. Octopus incella n in A new intertidal octopus species, Octopus incella (Cephalopoda: Octopodidae), from Okinawa, southern Japan
FIGURE 2. Octopus incella n. sp. (Paratype # 2, 31 mm ML male, NSMT – Mo. 75545). A. Digestive organ (scale bar: 5 mm), B. Upper beak, C. Lower beak (scale bar: 2.5 mm), D. Radula (scale bar: 0.1 mm). Abbreviations: AF—anal flaps; ASG—anterior salivary gland; BM—buccal mass; C—caecum; CD—crop diverticulum; CR—crop; DG—digestive gland; I—intestine; IS—ink sac; L 1 — first lateral tooth; L 2 — second lateral tooth; M—marginal tooth; MP—marginal plate; O—oesophagus; PSG—posterior salivary gland; R—rachidian tooth; S—stomach.
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)
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.