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51 results for “Eagle ray”
Gamma rays from dark matter spikes in EAGLE simulations - IMBH mock catalogue
<p>DArk Matter SPIkes (DAMSPI) is a fully Python-based software for the analysis of dark matter spikes around Intermediate Mass Black Holes (IMBHs) in the Milky Way. It allows to extract an IMBH catalogue and their corresponding dark matter spike parameters from the EAGLE simulations in order to probe a potential gamma-ray signal from dark matter self-annihilation. </p> <p>The dataset contains the IMBH catalogue including, among others, the coordinates, mass, formation redshift and spike parameters for each individual IMBH. Each column of the catalogue is described in detail in J. Aschersleben et al. (2024). We also provide separate files for which we calculated the gamma-ray fluxes for different dark matter masses and annihilation cross sections. Lastly, we provide a catalogue of our selection of Milky Way like galaxies within EAGLE. The columns of these files are also described in J. Aschersleben et al. (2024).</p> <p>The source code to extract this dataset is publicy available here:</p> <div> <div> <pre><a href="https://doi.org/10.5281/zenodo.11488472">https://doi.org/10.5281/zenodo.11488472</a></pre> </div> </div> <h2>Description of the data files</h2> <p>The imbh_catalogue/imbh/ directory contains the following files:</p> <ol> <li>catalogue_nfw.h5</li> <li>catalogue_cored_gamma_0p3.h5</li> <li>catalogue_cored_gamma_0p9.h5</li> <li>catalogue_cored_gamma_free.h5</li> </ol> <p>They contain the IMBH catalogues, including the coordinates and dark matter spike parameters, calculated assuming the 1.) NFW profile, 2.) cored profile with a fixed core index of 0.0, 3.) cored profile with a fixed core index of 0.4 and 4.) cored profile with the core index as a free fitting parameter.</p> <p>The imbh_catalogue/flux/<channel>/<energy_threshold>/ directory contains the gamma-ray fluxes of the IMBHs for a given annihilation channel, energy threshold, and dark matter mass. E.g. the imbh_catalogue/flux/b_channel/e_th_0.1GeV/m_dm_10.0GeV.h5 file contains the IMBH fluxes assuming the b-channel, an energy threshold of 0.1 GeV and a dark matter mass of 10 GeV. The IMBH fluxes are calculated for a variety of velocity weighted annihilation cross sections. </p> <p>The imbh_catalogue/galaxy/ directory contains the mw_galaxies_catalogue_nfw.h5 file which contains our selection of Milky Way-like galaxies within EAGLE.</p> <p>The HDF files can be opened in Python with:</p> <pre><code>import pandas as pd file_path = "<path_to_file>.h5" df = pd.read_hdf(file_path, key="table") # Printing the first few rows of the DataFrame print(df.head())</code><code> </code></pre>
Figure 1 in DNA barcoding supports the presence of the cryptic ocellated eagle ray, Aetobatus ocellatus (Myliobatidae), in French Polynesia, South Pacific
Figure 1. - Locations for sampled Aetobatus ocellatus (grey circles) in French Polynesia and for comparative materials (circles in insert: Australia, New Caledonia, Indonesia, India, South Africa, Brazil, Japan, Korea).
Figure 2 in DNA barcoding supports the presence of the cryptic ocellated eagle ray, Aetobatus ocellatus (Myliobatidae), in French Polynesia, South Pacific
Figure 2. - Neighbour-Joining distance tree (K2p model) of the partial COI sequences (652 bp, 'barcode region') revealing the placement of individuals of Aetobatus ocellatus from French Polynesia within the Aetobatus complex. Specimens are labelled with their BOLD Process ID. Bootstrap values over 75% are indicated above branches.
Figure 5 in Distribution patterns of ocellated eagle rays, Aetobatus ocellatus, along two sites in Moorea Island, French Polynesia
Figure 5. – Percentage of observations for the ten different behaviours according to the study site: swimming, foraging, chafing, cruising, escape, pre-mating, jumping, conspecific interaction, heterospecific interaction, come-close. See Table II for details on each behaviour.
Figure 2 in Distribution patterns of ocellated eagle rays, Aetobatus ocellatus, along two sites in Moorea Island, French Polynesia
Figure 2. – Multiple Correspondence Analysis factor map (2 first components, 34.5% and 19.4%, respectively) representing the relationship between the study sites (ClubMed/Mareto), ontogenetic stage of the eagle rays (male/female/juvenile), seasons (wet/dry), and the time of the day (am/pm).
Figure 1 in Distribution patterns of ocellated eagle rays, Aetobatus ocellatus, along two sites in Moorea Island, French Polynesia
Figure 1. – Map highlighting the two study sites on Moorea Island, French Polynesia: Mareto and ClubMed.
Figure 4 in Distribution patterns of ocellated eagle rays, Aetobatus ocellatus, along two sites in Moorea Island, French Polynesia
Figure 4. – Abundance (number of macroinvertebrate individuals) and biomass (grams) for the two study sites. The boxes represent the first and third quartiles, black lines are the medians (second quartiles), and whiskers cor- respond to the range (min-max) of the distributions. An asterisk indicates sta- tistically significant differences.
Figure 3 in Distribution patterns of ocellated eagle rays, Aetobatus ocellatus, along two sites in Moorea Island, French Polynesia
Figure 3. – Multiple Factor Analysis scatter plots (2 first components, 18% and 13%, respectively) representing the relationship between sex (male/ female/ juvenile), the site (ClubMed/Mareto) and the environmental factors: wave and wind direction (east/north/south/ west), wind speed (high/medium/low) and current strength (no/light/medium/ strong).
Fig. 5 in Fish blood flukes (Digenea: Aporocotylidae) from Indonesia: Two new genera and species infecting the banded eagle ray, Aetomylaeus nichofii (Bloch and Schneider, 1801) Capape´and Desoutter, 1979 (Myliobatiformes: Myliobatidae) from Borneo
Fig. 5. Phylogenetic relationships of chondrichthyan blood flukes based on morphological characters (tegumental spines, shape of intestines). Host affiliations are included. Dashed lines indicate species with no nucleotide sequences. Boxes indicate spine rows: blue = 2 + spine rows, green = 1 spine row, and red ⋂ = no spines. Shape of the intestine () inverse U-shaped and (X) X-shaped. (For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.)
Fig. 1-2. Aetohemecus kirstenjensenae Warren and Bullard n. gen., n in Fish blood flukes (Digenea: Aporocotylidae) from Indonesia: Two new genera and species infecting the banded eagle ray, Aetomylaeus nichofii (Bloch and Schneider, 1801) Capape´and Desoutter, 1979 (Myliobatiformes: Myliobatidae) from Borneo
Fig. 1-2. Aetohemecus kirstenjensenae Warren and Bullard n. gen., n. sp. (Digenea: Aporocotylidae) from the heart of the banded eagle ray, Aetomylaeus nichofii (Bloch and Schneider, 1801) Capape´and Desoutter, 1979 (Myliobatiformes: Myliobatidae). (1) Body of holotype (USNM No. 1642775), dorsal view. Bar = 250 μm. (2) Genitalia, paratype (USNM No. 1642776), ventral view. Bar = 100 μm. Mouth (mo), nerve commissure (nc), oesophagus (os), vitellarium (vit), intestine (i), testis (t), uterus (u), metraterm (met), ovary (o), vas deferens (v), seminal vesicle (sv), cirrus sac (cs), cirrus (c), vitelline duct (vd), common genital pore (cgp), oviducal ampullae (oa), and o¨otype (oo).
Fig. 3-4. Homestios janinecairae Warren and Bullard n. gen., n in Fish blood flukes (Digenea: Aporocotylidae) from Indonesia: Two new genera and species infecting the banded eagle ray, Aetomylaeus nichofii (Bloch and Schneider, 1801) Capape´and Desoutter, 1979 (Myliobatiformes: Myliobatidae) from Borneo
Fig. 3-4. Homestios janinecairae Warren and Bullard n. gen., n. sp. (Digenea: Aporocotylidae) from the heart of the banded eagle ray, Aetomylaeus nichofii (Bloch and Schneider, 1801) Capape´and Desoutter, 1979 (Myliobatiformes: Myliobatidae). (3) Body of holotype (USNM No. 1642774), dorsal view. Bar = 250 μm. (4) Genitalia of holotype (USNM No. 1642774), dorsal view. Bar = 100 μm. Mouth (mo), oesophagus (os), vitellarium (vit), intestine (in), testis (t), ovary (ov), vas deferens (vd), uterus, (u), ascending uterus (au), descending uterus (du), seminal vesicle (sv), cirrus (c), and common genital pore (cgp).
Eagle rays images
<p>This folder contains annotated images of eagle rays collected by plane in New Caledonia associated with the manuscript "Putting eagle rays on the map by coupling aerial video-surveys and deep learning" (https://doi.org/10.1016/j.biocon.2022.109494) published by Desgarnier et al. in Biological Conservation in 2022.</p>
Courtship behavior and a mating event of the Whitespotted eagle rays, Aetobatus narinari, in surrounding waters of the Anchieta Island State Park, Southeast Brazil.
<p>The Diving into Conservation project is a inititive that seeks to sensitize visitors of the Anchieta Island State Park (AISP), a protection area - IUCN Category II, about conservations matters, specially regaring the whitespotted eagle ray, <em>Aetobatus narinari</em>. The AISP's boundaries is safeguarded by a marine no-take zone. Since 2022, the project has been monitoring the AISP's surrounding waters, with volunteers conducting sampling campaigns using drones, Baited Remote Underwater Videos and Diver Operated Videos. Here, we present the records made on March 2023 and January 2024, showing the courtship behaviour and mating event of the species. Such findings reveal the importance of the protected areas as a safety place for mating events.</p>
FIGURE 2 in Two new species of Caulobothrium (Cestoda: "Tetraphyllidea") from the duckbill eagle ray, Aetomylaeus bovinus (Myliobatiformes: Myliobatidae), off Senegal with new insights on morphological features of the genus
FIGURE 2. Scanning electron micrographs of Caulobothrium multispelaeum n. sp. from Aetomylaeus bovinus off Senegal. A. Scolex; small letters indicate locations of details in E and F. B. Anterior region of bothridium showing apical sucker; inset light micrograph of same region. C. Medial longitudinal groove on immature proglottids; small letter indicates location of detail in G. D. Mature proglottid with medial longitudinal groove expanded laterally to form tandem series of elliptical apertures. E. Distal surface of bothridium. F. Proximal surface of bothridium. G. Surface of strobila.
FIGURE 4 in Two new species of Caulobothrium (Cestoda: "Tetraphyllidea") from the duckbill eagle ray, Aetomylaeus bovinus (Myliobatiformes: Myliobatidae), off Senegal with new insights on morphological features of the genus
FIGURE 4. Scanning electron micrographs of Caulobothrium katzi n. sp. from Aetomylaeus bovinus off Senegal. A. Scolex; small letters indicate locations of details in E–G. B. Anterior region of bothridium showing inconspicuous apical sucker (arrow). C. Proximal surface of bothridial rim at level of loculi. D. Distal surface of bothridial rim. E. Distal surface of bothridium away from rim. F. Proximal surface of bothridium. G. Surface of cephalic peduncle.
FIGURE 1 in Two new species of Caulobothrium (Cestoda: "Tetraphyllidea") from the duckbill eagle ray, Aetomylaeus bovinus (Myliobatiformes: Myliobatidae), off Senegal with new insights on morphological features of the genus
FIGURE 1. Line drawings of Caulobothrium multispelaeum n. sp. from Aetomylaeus bovinus off Senegal. A. Scolex (paratype; USNM No. 1638628). B. Whole worm (paratype; USNM No. 1638628). C. Mature proglottid (holotype; MNHN No. HEL1365). D. Detail of terminal genitalia and ootype region, elliptical depressions/apertures removed (holotype; MNHN No. HEL1365).
FIGURE 6 in Two new species of Caulobothrium (Cestoda: "Tetraphyllidea") from the duckbill eagle ray, Aetomylaeus bovinus (Myliobatiformes: Myliobatidae), off Senegal with new insights on morphological features of the genus
FIGURE 6. Apical suckers in Caulobothrium tetrascaphium and Caulobothrium pedunculatum. A. Scanning electron micrograph of apical sucker of C. tetrascaphium. B. Light micrograph of frontal section through apical sucker of C. tetrascaphium (LRP No. 10256). C. Light micrograph of apical sucker of Caulobothrium pedunculatum (LRP No. 3914).
FIGURE 3 in Two new species of Caulobothrium (Cestoda: "Tetraphyllidea") from the duckbill eagle ray, Aetomylaeus bovinus (Myliobatiformes: Myliobatidae), off Senegal with new insights on morphological features of the genus
FIGURE 3. Line drawings of Caulobothrium katzi n. sp. from Aetomylaeus bovinus off Senegal. A. Scolex (holotype; MNHN No. HEL1369). B. Whole worm (holotype; MNHN No. HEL1369). C. Detail of terminal genitalia (holotype; MNHN No. HEL1369). D. Mature proglottid (paratype; USNM No. 1638631).
FIGURE 5 in Two new species of Caulobothrium (Cestoda: "Tetraphyllidea") from the duckbill eagle ray, Aetomylaeus bovinus (Myliobatiformes: Myliobatidae), off Senegal with new insights on morphological features of the genus
FIGURE 5. Light micrographs of sections of Caulobothrium multispelaeum n. sp. and Caulobothrium katzi n. sp. stained with Delafield's hematoxylin and counter-stained with eosin. A. Cross section of mature proglottid of C. multispelaeum n. sp. anterior to cirrus sac. B. Cross section of mature proglottid of C. multispelaeum n. sp. at level of ovarian isthmus. C. Cross section of mature proglottid of C. katzi n. sp. anterior to cirrus sac. D. Cross section of mature proglottid of C. katzi n. sp. slightly posterior to ovarian isthmus. Abbreviations: O, ovary; T, testis; VF, vitelline follicle.
Data from: Population structure and seasonal migration of the spotted eagle ray, Aetobatus narinari
Few studies have reported on the fine-scale population genetics of batoid species in the Atlantic basin. Here, we investigate the genetic diversity and population structure of the spotted eagle ray, Aetobatus narinari, sampled in the northeastern and southwestern parts of the Gulf of Mexico and in the northwestern Caribbean Sea. Samples were collected from 286 individuals sampled across 3 geographic localities. Estimates of divergence based on the mitochondrial cytochrome b gene and 10 nuclear microsatellite loci reveal weak but significant genetic structure among A. narinari populations in this region. Analysis of molecular variance estimates based on both marker types indicate significant differentiation between Florida and Mexico populations, while comparisons with Cuba suggest high levels of gene flow with rays from both Mexico and Florida. Conflicting results were found from the different marker types when sexes were analyzed separately underscoring the importance of applying multiple marker types when making inferences about population structure and sex-biased dispersal. Results from Bayesian clustering analyses suggest rays may be migrating south out of the Gulf of Mexico and into the northwestern Caribbean Sea. Given the impacts of fisheries on this species, coupled with the lack of population genetic data available, these findings offer valuable information to aid with conservation management strategies.
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