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2,345 results for “sharks”
Fig. 4 in A New Species of Podocerus (Crustacea: Amphipoda: Podoceridae) Associated with the Whale Shark Rhincodon typus
Fig. 4. Podocerus jinbe sp. nov., holotype male 6.0 mm, NSMT-Cr 26048. A, pereopod 5, medial view; B, pereopod 6, medial view; C, pereopod 7, medial view; D, basis and ischium of pereopod 7, medial view; E, pleopod 1, medial view; F, retinacula (coupling hooks) of peduncle of pleopod 1, medial view; G, uropod 1, dorsal view; H, uropod 2, dorsal view; I, uropod 3, dorsal view; J, telson, dorsal view.
Fig. 3 in A New Species of Podocerus (Crustacea: Amphipoda: Podoceridae) Associated with the Whale Shark Rhincodon typus
Fig. 3. Podocerus jinbe sp. nov., holotype male 6.0 mm, NSMT-Cr 26048. A, basis to dactylus of gnathopod 1 (some setae omitted; dactylus is strongly curved due to mounting angle), medial view; B, basis to dactylus of gnathopod 2 (some setae omitted), medial view; C, palmar margin of gnathopod 2 propodus, medial view; D, pereopod 3, medial view; E, basis and ischium of pereopod 3, medial view; F, pereopod 4.
Figure 2 in A new Early Cretaceous lamniform shark (Chondrichthyes, Neoselachii)
Figure 2. Eoptolamna eccentrolopha gen. et sp. nov. from the upper Barremian of Vallipón. A–D, anterolateral tooth, MPZ 2005-4, holotype. A, labial view. B, profile view. C, lingual view. D, occlusal view. E–G, symphyseal? tooth, MPZ 2005-5, paratype. E, labial view. F, profile view. G, lingual view. H–J, anterior tooth, MPZ 2005-6, paratype. H, labial view. I, profile view. J, lingual view. K–N, lateral tooth, MPZ 2005-7, paratype. K, labial view. L, labio-occlusal view. M, profile view. N, lingual view. O–R, lateral tooth, MPZ 2005-8, paratype. O, labial view. P, labio-occlusal view. Q, profile view. R, linguo-occlusal view. S–V, lateral tooth, MPZ 2005-9, paratype. S, labial view. T, labio-occlusal view. U, profile view. V, lingual view. W–Z, posterior tooth, MPZ 2005-10, paratype. W, labial view. X, profile view. Y, lingual view. Z, occlusal view. Scale bar: 0.5 cm.
Global Dataset of Shark and Chimaera Ranges
<p>This is a dataset of 534 shark and chimaera ranges as spatial polygons in a .json file type. Collated from the literature and shared with the IUCN.</p>
Fig. 3 in First Deep-Sea Shark Fossil Teeth From The Miocene Of South Korea
Fig. 3. Tooth of Dalatias cf. D. licha, CNUNHM-F392: A — photograph of the specimen; B — enlarged photograph of the labial surface of the tooth. Left scale bar, for A, equals 10 mm. Right scale bar, for B, equals 5 mm.
Fig. 2 in First Deep-Sea Shark Fossil Teeth From The Miocene Of South Korea
Fig. 2. Tooth of Dalatias licha, CNUNHM-F279: A — photograph of the specimen; B — enlarged photograph of the labial surface of the tooth. Left scale bar, for A, equals 10 mm. Right scale bar, for B, equals 5 mm.
Fig. 1 in First Deep-Sea Shark Fossil Teeth From The Miocene Of South Korea
Fig. 1. Tooth of Mitsukurina cf. M. lineata, CNUNHM-F268: A — photograph of the specimen; B — enlarged photograph of the labial surface of the tooth; C — enlarged photograph of the lingual part of the tooth. Left scale bar, for A, equals 20 mm. Right scale bar, for B and C, equals 10 mm.
Data and analysis from: Body mass, temperature, and depth shape the maximum intrinsic rate of population increase in sharks and rays
<p>An important challenge in ecology is to understand variation in species' maximum intrinsic rate of population increase, 𝑟<sub>𝑚𝑎𝑥</sub>, not least because 𝑟<sub>𝑚𝑎𝑥</sub> underpins our understanding of the limits of fishing, recovery potential, and ultimately extinction risk. Across many vertebrate species, terrestrial and aquatic, body mass and environmental temperature are important correlates of 𝑟<sub>𝑚𝑎𝑥</sub>. In sharks and rays, specifically, 𝑟<sub>𝑚𝑎𝑥</sub> is known be lower in larger species, but also in deep-sea ones.</p> <p>We use an information-theoretic approach that accounts for phylogenetic relatedness to evaluate the relative importance of body mass, temperature and depth on 𝑟<sub>𝑚𝑎𝑥</sub>. We show that both temperature and depth have separate effects on shark and ray 𝑟<sub>𝑚𝑎𝑥</sub> estimates, such that species living in deeper waters have lower 𝑟<sub>𝑚𝑎𝑥</sub>. Furthermore, temperature also correlates with changes in the mass scaling coefficient, suggesting that as body size increases, decreases in 𝑟<sub>𝑚𝑎𝑥</sub> are much steeper for species in warmer waters.</p> <p>These findings suggest that there are (as-yet understood) depth-related processes that limit the maximum rate at which populations can grow in deep sea sharks and rays. While the deep ocean is associated with colder temperatures, other factors that are independent of temperature, such as food availability and physiological constraints, may influence the low 𝑟<sub>𝑚𝑎𝑥</sub> observed in deep sea sharks and rays. Our study lays the foundation for predicting the intrinsic limit of fishing, recovery potential, and extinction risk species based on easily accessible environmental information such as temperature and depth, particularly for data-poor species.</p> <p>This repository contains the data and a minimum working example of the model-fitting process used for the article "Body mass, temperature, and depth shape productivity in sharks and rays", which is currently in press at <em>Ecology and Evolution</em>.</p>
Text-fig. 11. Permian ichthyofaunas from the French Massif Central. Preliminary comparisons based on total accounts of individuals (see text for explanations). Sharks in green, Acanthodes sp. in yellow, Actinopterygians in blue, Dipnoi in white (not visible but present at Autun; see Tab. 1 for details). Each circle is proportional to the total number of specimens recovered. Permian outcrops in black. Hercynian basement indicated by vertical lines. Map modified from Gand and Durand (2006). in New Actinopterygians From The Permian Of The Brive Basin, And The Ichthyofaunas Of The French Massif Central
Text-fig. 11. Permian ichthyofaunas from the French Massif Central. Preliminary comparisons based on total accounts of individuals (see text for explanations). Sharks in green, Acanthodes sp. in yellow, Actinopterygians in blue, Dipnoi in white (not visible but present at Autun; see Tab. 1 for details). Each circle is proportional to the total number of specimens recovered. Permian outcrops in black. Hercynian basement indicated by vertical lines. Map modified from Gand and Durand (2006).
Fig. 8 in Redescription of the Chilean angel shark Squatina armata (Philippi, 1887) (Squatiniformes, Squatinidae)
Fig. 8. Bayesian inference phylogenetic reconstruction of 11 species of Squatina Duméril, 1805 for which CO1, 16S and NADH2 sequences were available. Species groups are colour-coded in the phylogeny and the geographic distributions on the map. Sampling location of the S. armata (Philippi, 1887) vouchers MNHNCL ICT 7625 (neotype) and MNHNCL ICT 7626 is indicated with an orange circle.
Fig. 6 in Redescription of the Chilean angel shark Squatina armata (Philippi, 1887) (Squatiniformes, Squatinidae)
Fig. 6. Squatina armata (Philippi, 1887) (voucher MNHNCL ICT 7626), clasper morphology.a. External. b–c. Skeletal dorsal (b) and ventral (c) views. Abbreviations: acd = accessory dorsal marginal cartilage; ap = apopyle; ax =axial cartilage; cg = clasper groove; cgl = clasper glans; crh = cover rhipidion; dm = dorsal marginal; dt = dorsal terminal; dt2 = dorsal terminal 2; gcr = globular cartilaginous rod; hyp = hypopyle; rh = rhipidion; vm = ventral marginal cartilage; vt = ventral terminal; vt2 = ventral terminal 2.
Fig. 5 in Redescription of the Chilean angel shark Squatina armata (Philippi, 1887) (Squatiniformes, Squatinidae)
Fig. 5. Squatina armata (Philippi, 1887), adult ♂, obtained from the fishmarket of Higuerillas, central Chile, date of capture 18 Mar. 2020 (collection code CCM-1228, Chondrolab, Universidad de Valparaíso). Close up of individual teeth not to scale.
Fig. 4 in Redescription of the Chilean angel shark Squatina armata (Philippi, 1887) (Squatiniformes, Squatinidae)
Fig. 4. Squatina armata (Philippi, 1887), neotype, ♂ (MNHNCL ICT 7625), dermal denticle shapes and patterns. a. Rostral area, frontal view. b. Interorbital area. c–d. Medial-dorsal denticles in frontal (c) and lateral (d) views. e. Caudal area, la
Fig. 2 in Redescription of the Chilean angel shark Squatina armata (Philippi, 1887) (Squatiniformes, Squatinidae)
Fig. 2. Squatina armata (Philippi, 1887), neotype, ♂ (MNHNCL ICT 7625), illustration of the left anterior nasal flap. a. Anterior barbel. b. Median barbel. c. Posterior barbel. Illustrations by IFC.
Fig. 1 in Redescription of the Chilean angel shark Squatina armata (Philippi, 1887) (Squatiniformes, Squatinidae)
Fig. 1. Squatina armata (Philippi, 1887), neotype, ♂ (1004 mm total length; MNHNCL ICT 7625), fresh specimen. a. Dorsal view. b. Ventral view.
Fig. 3 in Redescription of the Chilean angel shark Squatina armata (Philippi, 1887) (Squatiniformes, Squatinidae)
Fig. 3. Squatina armata (Philippi, 1887), neotype, ♂ (MNHNCL ICT 7625), dorsal thorns. a. Patches of thorns on head forming three pairs; one pair on internarinal space (left one marked a1), second patch on pre-orbital area (a2), third patch on postorbital area (a3), two pairs of interspiracle thorns (a4). b. Single patch of 91–93 thorns on apex of each pectoral fin; thorns hooked, inwardly curved. c. Close-up of a pectoral fin thorn. d. 36 dorsal hooked thorns forming a single row: one medial-dorsal thorn anterior to pelvic girdle followed by 30 caudal thorns and 5 interdorsal thorns (not shown).
Fig. 7 in Redescription of the Chilean angel shark Squatina armata (Philippi, 1887) (Squatiniformes, Squatinidae)
Fig. 7 (see previous page). Neighbour-Joining tree of the angel shark CO1, 16S and NADH2 sequences included in this study. Non-American species reduced to one sequence per species for illustrative purposes. Approximate geographic distributions of the species are colour-coded. Sampling location and position in the NJ tree of the Squatina armata (Philippi, 1887) vouchers MNHNCL ICT 7625 (neotype) and MNHNCL ICT 7626 are indicated with orange circles.
FIGURE 3 in Multidecadal fishers' knowledge reveals overexploitation of sharks in southeastern Brazil
FIGURE 3 | Best day's catches (number of individuals caught) according to hook and line fishers of Arraial do Cabo. A. Spinner shark, Carcharhinus brevipinna, with fourth order polynomial regression (r² = 0.02, p = 0.8); B. Shortfin mako shark, Isurus oxyrinchus, with second order polynomial regression (r² = 0.14, p = 0.46); C. Sandbar shark, Carcharhinus plumbeus, with third order polynomial regression (r² = 0.08, p = 0.02).
FIGURE 5 in Multidecadal fishers' knowledge reveals overexploitation of sharks in southeastern Brazil
FIGURE 5 | Photographs showing past and present of beach seine catches of spinner shark, Carcharhinus brevipinna, caught in Arraial do Cabo, Brazil. A. Individuals caught in 1979; B. In 1996; C. In 2005; and D. In 2014. Images were kindly provided by interviewed fishers of Arraial do Cabo.
FIGURE 4 in Multidecadal fishers' knowledge reveals overexploitation of sharks in southeastern Brazil
FIGURE 4 | Spatial distribution of fishing grounds of best day's shark catches in Arraial do Cabo (number of individuals caught). A. Spinner shark, Carcharhinus brevipinna, catches from 1979 to 2005 and B. 2006 to 2019; C. Shortfin mako shark, Isurus oxyrinchus, catches from 1962 to 2005 and D. 2006 to 2019; E. Sandbar shark, Carcharhinus plumbeus, catches from 1968 to 2005 and F. 2008 to 2019.
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.