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29 results for “little penguin”
Fig. 3 in Epidemiology and molecular phylogeny of Babesia sp. in Little Penguins Eudyptula minor in Australia
Fig. 3. Agarose gel electrophoresis of amplification products obtained through nested PCR tests targeting the 18S rRNA gene of Babesia (primers Bab5.1/BabB followed by RLBF/RLBR) or the mitochondrial cytochrome b gene of Haemoproteus/Plasmodium (primers HaemNFI/HaemNR3 followed by HaemF/HaemR2). The following samples are represented: (a) captive-born little penguin chick, negative blood smear; (b) adult wild little penguin, negative blood smear; (c) Babesia-infected adult wild little penguin, as confirmed through blood smear; (d) Haemoproteus-infected adult tropical screech owl, as confirmed through blood smear; (e) Plasmodium-inoculated chicken, raised in arthropod-free environment; (f) blood parasite-free chicken, raised in arthropodfree environment.
Fig. 1 in Epidemiology and molecular phylogeny of Babesia sp. in Little Penguins Eudyptula minor in Australia
Fig. 1. Geographic distribution of sampling locations, southeast Australia. Site details are given in Table 1. The geographic distribution of little penguins (black area) is shown in the top right map (adapted from Marchant and Higgins, 1990).
Fig. 4 in Epidemiology and molecular phylogeny of Babesia sp. in Little Penguins Eudyptula minor in Australia
Fig. 4. Maximum likelihood phylogenetic tree of the 18S rRNA gene of the studied Babesia lineages. Lineages identified in this study are emphasized in red, and other avianinfecting lineages are emphasized in blue. For each lineage, the following information is provided: morphospecies (Genbank ascension number) host species. For avianinfecting lineages, the geographic location is also provided. Branch lengths are drawn proportionally to evolutionary distance (scale bar is shown). For interpretation of the references to colour in this figure legend, the reader is referred to the web version of this article.
Fig. 2 in Epidemiology and molecular phylogeny of Babesia sp. in Little Penguins Eudyptula minor in Australia
Fig. 2. Babesia sp. in the blood smear of a little penguin. Individual details: TAS- 124, male, adult, moulting, sampled at "Darlington Foreshore" (Maria Island, Tasmania) in 21/02/2013, Genbank ascension number KP144323, Giemsa stain.
Fig. 9 in Fatal toxoplasmosis in Little Penguins (Eudyptula minor) from Penguin Island, Western Australia
Fig. 9. Similarity of Toxoplasma gondii from Little Penguins with representative strains from Archetypals I, II, and III in the B1 gene. A: shows polymorphisms at the 366 nucleotide. B: shows polymorphisms at the 504 nucleotide. Declaration of competing interest
Fig. 6 in Fatal toxoplasmosis in Little Penguins (Eudyptula minor) from Penguin Island, Western Australia
Fig. 6. (And detail) – four parasites in a cyst within the cytoplasm of a host cell, spleen (x3810, bar = 2 μm) Image left: E - erythrocyte, Ph - phagocyte, P - protozoa; image right (detail): N - nucleus.
Fig. 5 in Fatal toxoplasmosis in Little Penguins (Eudyptula minor) from Penguin Island, Western Australia
Fig. 5. Splenic impression smear, erythrocytes (E), splenic stromal cells (S) and numerous protozoa (arrows) (Wright's Giemsa stain, 1000x).
Fig. 4 in Fatal toxoplasmosis in Little Penguins (Eudyptula minor) from Penguin Island, Western Australia
Fig. 4. Liver, intact and necrotic hepatocytes and numerous protozoa (arrows), free and within cysts (5 μm section, Martius Scarlet Blue stain, 400x). (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
Fig. 11 in Fatal toxoplasmosis in Little Penguins (Eudyptula minor) from Penguin Island, Western Australia
Fig. 11. Liver, staining of protozoan antigen in intact and necrotic hepatocytes (x400 Toxoplasma polyclonal antibody IHC).
Fig. 3 in Fatal toxoplasmosis in Little Penguins (Eudyptula minor) from Penguin Island, Western Australia
Fig. 3. Liver, necrotic focus (the area of relative pallor, within which numerous organisms were identifiable) (5 μm section, Haematoxylin and Eosin stain, 100x).
Fig. 10 in Fatal toxoplasmosis in Little Penguins (Eudyptula minor) from Penguin Island, Western Australia
Fig. 10. Liver, several foci of brown staining indicate Toxoplasma antigen within a necrotic focus (x100, Toxoplasma polyclonal antibody IHC). (For interpretation of the references to colour in this figure legend, the reader is referred to the Web version of this article.)
Fig. 8 in Fatal toxoplasmosis in Little Penguins (Eudyptula minor) from Penguin Island, Western Australia
Fig. 8. Dividing protozoan forming merozoites (x15000, bar = 1 μm).
Fig. 7 in Fatal toxoplasmosis in Little Penguins (Eudyptula minor) from Penguin Island, Western Australia
Fig. 7. Protozoan with apical complex (x15000, bar = 1 μm).
Fig. 2 in Fatal toxoplasmosis in Little Penguins (Eudyptula minor) from Penguin Island, Western Australia
Fig. 2. Enlarged spleen with speckled tan areas of discolouration.
Fig. 1 in Fatal toxoplasmosis in Little Penguins (Eudyptula minor) from Penguin Island, Western Australia
Fig. 1. Enlarged liver with multiple, pinpoint cream to white spots.
Data for: Energetic consequences of prey type in little penguins (Eudyptula minor)
<p>Investigation of foraging decisions can help understand how animals efficiently gather and exploit food. Prey chase and handling times are important aspects of foraging efficiency, influencing the net energy gain derived from a prey item. However, these metrics are often overlooked in studies of foraging behaviour due to the difficulty in observing them. The present study used animal-borne cameras to investigate the type, duration and energetic consequences of predator-prey interactions in little penguins (<em>Eudyptula minor</em>) (n = 32) from two colonies in Bass Strait, south-eastern Australia. A total of 7 main prey items were observed and consumed by little penguins. Penguins were observed to consume prey types and use strategies that have not been previously documented. These included consumption of bellowsfish (<em>Macroramphosus scolopax</em>) and other fish species captured sheltering around jellyfish or extracted dead from the tentacles. Chase and handling time varied with prey type and lasted ~2 s for most prey. Profitability varied amongst prey types, with a greater amount of low profitable prey being consumed, suggesting a trade-off between minimising energetic costs, and increasing capture rates. These results highlight the use of animal-borne video data loggers to further understand the foraging adaptations of important predators in the marine environment.</p>
Data for: Energetic consequences of prey type in little penguins (Eudyptula minor)
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Data from: Dispersal in the sub-Antarctic: king penguins show remarkably little population genetic differentiation across their range
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Finite element modelling of hearing capabilities in the Little Penguin (Eudyptula minor)
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Data from: Tandem host-parasite dispersal inferred from similarities in phylogeographic patterns among little penguins and their 'terrestrial' ectoparasites
Aim Organisms with poor intrinsic dispersal capacity, such as parasites, often rely entirely on transport with host species that have a greater dispersal capacity. Penguins, for example, are exploited by terrestrial ectoparasites when they come ashore to breed. Recent research indicates that little penguin (Eudyptula minor and E. novaehollandiae) hard ticks (Ixodes eudyptidis and I. kohlsi) may be capable of surviving short periods (days) at sea with their hosts, but their capacity to survive longer voyages (weeks) is not known. We here aimed to assess whether phylogeographic patterns in little penguins and their ticks indicate that the terrestrial ectoparasites are able to disperse long distances at sea with their swimming hosts. Location Southern Australia and New Zealand. Taxon Ixodes eudyptidis and I. kohlsi ticks. Methods We conducted a broad-scale genomic assessment of little penguin ticks from across their hosts' ranges in Australia and New Zealand. Using Genotyping by Sequencing (GBS), we generated SNP data sets from ticks from 14 penguin colonies, and analysed phylogeographic structure. We included ticks from some sympatric flighted seabirds to verify host-specificity. Results We resolved two distinct lineages of Ixodes from little penguins, with one restricted to Australia, and the other found throughout New Zealand and in low numbers at some eastern Australian sites. Both lineages exhibited phylogeographic structure consistent with patterns observed in their hosts, with some evidence of occasional oceanic dispersal, including across the Tasman Sea between Australia and New Zealand. Ticks from sympatric short-tailed shearwaters (Ardenna tenuirostris), which disperse aerially, were genetically distinct from those collected from little penguins, supporting prior evidence of host-specificity in seabird ticks. Main conclusions The most parsimonious explanation for our results is that ticks can travel at sea with little penguins. We infer that some terrestrial ectoparasites associated with aquatically-dispersing hosts have evolved the capacity to survive oceanic voyages.
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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.