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174 results for “seahorse”
FIGURE 3 in A global revision of the Seahorses Hippocampus Rafinesque 1810 (Actinopterygii: Syngnathiformes): Taxonomy and biogeography with recommendations for further research
FIGURE 3. Range map for Hippocampus algiricus. Note the location that the holotype was reported from (Algeria). As no further specimens of H. algiricus have occurred in the Mediterranean, we restrict the range to West Africa and presume the holotype locality to possibly have been mislabelled. See Figure 2 caption for further details.
Supplementary material 1 from: Short G, Smith R, Motomura H, Harasti D, Hamilton H (2018) Hippocampus japapigu, a new species of pygmy seahorse from Japan, with a redescription of H. pontohi (Teleostei, Syngnathidae). ZooKeys 779: 27-49. https://doi.org/10.3897/zookeys.779.24799
Genetic distance analysis (uncorrected p distances) of COI sequence data from 21 specimens of H.pontohi and those referred to H.severnsi :
Data from: Extremely fast feeding strikes are powered by elastic recoil in a seahorse relative, the snipefish, Macroramphosus scolopax
Among over 30,000 species of ray-finned fishes, seahorses and pipefishes have a unique feeding mechanism whereby the elastic recoil of tendons allows them to rotate their long snouts extremely rapidly in order to capture small elusive prey. To understand the evolutionary origins of this feeding mechanism, its phylogenetic distribution among closely related lineages must be assessed. We present evidence for elastic recoil powered feeding in the snipefish (Macroramphosus scolopax) from kinematics, dynamics, and morphology. High-speed videos of strikes show they achieve extremely fast head and hyoid rotational velocities, resulting in rapid prey capture in as short at 2 ms. The maximum instantaneous muscle-mass-specific power requirement for head rotation in snipefish was above the known vertebrate maximum, which is evidence that strikes are not the result of direct muscle power. Finally, we show that the over-center conformation of the four-bar linkage mechanism coupling head elevation to hyoid rotation in snipefish can function as a torque reversal latch, preventing the head from rotating and providing the opportunity for elastic energy storage. The presence of elastic recoil feeding in snipefish means that this high-performance mechanism is not restricted to the Syngnathidae (seahorses and pipefish) and may have evolved in parallel.
Figure 3 in A snapshot of a high density seahorse population in a tropical rocky reef
Figure 3. Population parameters of the seahorse H. reidi at all eight sites around Guaíba Island, Mangaratiba, RJ: (a) operational sex ratio; (b) mean heights (cm) and standard deviations; (c) depth (m).
Figure 2 in A snapshot of a high density seahorse population in a tropical rocky reef
Figure 2. Density (ind m−2) of the seahorse H. reidi at all eight sites around Guaíba Island, Mangaratiba, RJ.
Figure 4 in A snapshot of a high density seahorse population in a tropical rocky reef
Figure 4. Frequency of occurrence of the seahorse H. reidi in different holdfasts in Guaíba Island, Mangaratiba, RJ.
FIGURE 4 in Three new pygmy seahorse species from Indonesia (Teleostei: Syngnathidae: Hippocampus)
FIGURE 4. Live specimens of new species of pygmy seahorses from Indonesia. A) Hippocampus pontohi: Bunaken, Sulawesi, M. Boyer; Bunaken, Sulawesi, M. Aw; Raja Ampat, West Papua, L. Tackett. B) Hippocampus severnsi: Bunaken, Sulawesi, S. Wong & T. Uno; Bunaken, Sulawesi, M. Severns (type specimens); Raja Ampat, West Papua, L. Tackett. C) Hippocampus satomiae: Derawan Kalimantan, S. Wong & T. Uno; Derawan, Kalimantan, J–S. Chen; Derawan, Indonesia, S. Onishi (type specimen).
FIGURE 2 in Three new pygmy seahorse species from Indonesia (Teleostei: Syngnathidae: Hippocampus)
FIGURE 2. Radiographs of holotype specimens: A) Hippocampus pontohi (MZB 13593, 16.9 mm), B) Hippocampus severnsi (MZB 13594, 16.6 mm), and C) Hippocampus satomiae (NMV A25420–001, 13.8 mm). Scale bar = 2 mm in each case.
FIGURE 5. Distribution records for A in Three new pygmy seahorse species from Indonesia (Teleostei: Syngnathidae: Hippocampus)
FIGURE 5. Distribution records for A) Hippocampus pontohi, B) Hippocampus severnsi, C) Hippocampus satomiae.
FIGURE 1 in Three new pygmy seahorse species from Indonesia (Teleostei: Syngnathidae: Hippocampus)
FIGURE 1. Ordination plot using the first and third axes of a principal co–ordinates analysis of 14 morphometric measurements and 3 meristic counts (see text for list of variables). Open symbols represent specimens of the three new species described in this paper: circles – H. pontohi, squares – H. severnsi and diamonds – H. satomiae. Filled symbols represent previously described species: circles – Hippocampus bargibanti, squares – H. denise, triangles – H. colemani.
Data from: Genetic evidence for monogamy in the dwarf seahorse, Hippocampus zosterae
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Data from: Navigating the southern seas with small fins: Genetic connectivity of seahorses (Hippocampus abdominalis) across the Tasman Sea
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Data from: Extremely fast feeding strikes are powered by elastic recoil in a seahorse relative, the snipefish, Macroramphosus scolopax
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Data from: Parallel pattern of differentiation at a genomic island shared between clinal and mosaic hybrid zones in a complex of cryptic seahorse lineages
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Data from: Population genomics reveals seahorses (Hippocampus erectus) of the western mid-Atlantic coast to be residents rather than vagrants
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When more is not merrier: using wild population dynamics to understand the effect of density on ex situ seahorse mating behaviors
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Fig. 2 in Disruptive coloration and habitat use by seahorses
Fig. 2. Percentage of occurrence of body-color for each color morph of Hippocampus reidi (dark colored bars: disruptive morph; light-colored bars: plain morph). Tags above each column indicate the absolute number of individuals.
Fig. 5 in Disruptive coloration and habitat use by seahorses
Fig. 5. Percentage of occurrence of individuals of Hippocampus reidi with body-color different from the background color, for each color morph. Tags above each column indicate the absolute number of individuals.
Fig. 3 in Disruptive coloration and habitat use by seahorses
Fig. 3. Connectance of the two seahorse Hippocampus reidi color morphs to the background color (a) and holdfast (b). In parentheses is the value for the connectance index. Sup. Plant = Superior plants.
Fig. 1 in Disruptive coloration and habitat use by seahorses
Fig. 1. Study area in Ilha Grande Bay, Rio de Janeiro, Brazil (Image source: Infraestrutura Nacional de Dados Espaciais CC-BY 3.0).
ScienceDex guides
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Allen Brain Atlas
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DANDI Archive for NWB datasets
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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.