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918 results for “oceanic islands”
Data from: Gentle Africanized bees on an oceanic island
Oceanic islands have reduced resources and natural enemies and potentially affect life history traits of arriving organisms. Among the most spectacular invasions in the Western hemisphere is that of the Africanized honey bee. We hypothesized that in the oceanic island Puerto Rico Africanized bees will exhibit differences from the mainland population such as for defensiveness and other linked traits. We evaluated the extent of Africanization through three typical Africanized traits: wing size, defensive behavior, and resistance to Varroa destructor mites. All sampled colonies were Africanized by maternal descent, with over 65% presence of European alleles at the S-3 nuclear locus. In two assays evaluating defense, Puerto Rican bees showed low defensiveness similar to European bees. In morphology and resistance to mites Africanized bees from Puerto Rico are similar to other Africanized bees. In behavioral assays on mechanisms of resistance to Varroa, we directly observed that Puerto Rican Africanized bees groomed-off and bit the mites as been observed in other studies. In no other location Africanized bees have reduced defensiveness while retaining typical traits such as wing size and mite resistance. This mosaic of traits that has resulted during the invasion of an oceanic island has implications for behavior, evolution, and agriculture.
Data from: A new framework for investigating biotic homogenization and exploring future trajectories: oceanic island plant and bird assemblages as a case study
Studies of biotic homogenization have focused primarily on characterizing changes that have occurred between some past baseline and the present day. In order to understand how homogenization may change in the future, it is important to contextualize the processes driving these changes. Here, we examine empirical patterns of change in taxonomic similarity among oceanic island plant and bird assemblages. We use these empirical cases to unpack dynamic properties of biotic homogenization, thereby elucidating two important factors that have received little attention: 1) initial similarity and 2) the influence of six classes of introduction and extinction events. We use Jaccard's Index to explore the interplay among these factors in determining the changes in similarity that have occurred between human settlement and the present. Specifically, we develop general formulas for changes in similarity resulting from each of the six types of introductions and extinctions, so that the effect of each event type is formulated in terms of initial similarity and species richness. We then apply these insights to project how similarity levels would change in the future if the present patterns of introductions and extinctions continue. We show that the six event types, along with initial similarity, can show dramatically different behavior in different systems, leading to widely variable influences on similarity. Plant and bird biotas have homogenized only slightly to date, but their trajectories of change are highly divergent. Although existing patterns of colonization and extinction might not continue unchanged, if they were to do so then plant assemblages would show little additional change, whereas bird assemblages would become much more strongly homogenized. Our results suggest that moderate changes in similarity observed to date mask the potential for more dramatic changes in the future, and that the interaction among initial similarity and differential introduction and extinction regimes drives these dynamics.
FIGURE 4 in Gymnothorax hansi, a new species of moray eel (Teleostei: Anguilliformes: Muraenidae) from the Comoro Islands, Western Indian Ocean
FIGURE 4. Dentition of adult female
FIGURE 3 in Gymnothorax hansi, a new species of moray eel (Teleostei: Anguilliformes: Muraenidae) from the Comoro Islands, Western Indian Ocean
FIGURE 3. Head of
FIGURE 9 in The Caprellidea (Crustacea: Amphipoda) from Mauritius Island, Western Indian Ocean
FIGURE 9. Noculacia sp. Female lateral view. Scale bar: 1 mm.
FIGURE 8. Metaprotella sandalensis Mayer, 1898. Lateral view. A in The Caprellidea (Crustacea: Amphipoda) from Mauritius Island, Western Indian Ocean
FIGURE 8. Metaprotella sandalensis Mayer, 1898. Lateral view. A, male; B, female. Scale bar: 1 mm.
FIGURE 3. Hemiaegina minuta Mayer, 1890. Lateral view. A in The Caprellidea (Crustacea: Amphipoda) from Mauritius Island, Western Indian Ocean
FIGURE 3. Hemiaegina minuta Mayer, 1890. Lateral view. A, male; B, female. Scale bar: 1 mm.
FIGURE 2. Caprella scaura Templeton, 1836. Lateral view. A in The Caprellidea (Crustacea: Amphipoda) from Mauritius Island, Western Indian Ocean
FIGURE 2. Caprella scaura Templeton, 1836. Lateral view. A, male; B, female. Scale bar: 1 mm.
FIGURE 1 in Gone with the wind: westward dispersal across the Indian Ocean and island speciation in Hemicordulia dragonflies (Odonata: Corduliidae)
FIGURE 1. Secondary genitalia of Hemicordulia africana n. sp. in lateral view.
FIGURE 1 in A new anchialine shrimp of the genus Procaris from Christmas Island: the first occurrence of the Procarididae in the Indian Ocean (Crustacea: Decapoda: Caridea)
FIGURE 1 Procaris noelensis sp. nov., holotype, Christmas Island. Scale bar in millimeters.
FIGURE 19 in Coastal Fishes of São Tomé and Príncipe islands, Gulf of Guinea (Eastern Atlantic Ocean)-an update
FIGURE 19. Gobius sp. aff. rubropunctatus male, Lagoa Azul, photo L.A. Rocha
FIGURE 25 in Coastal Fishes of São Tomé and Príncipe islands, Gulf of Guinea (Eastern Atlantic Ocean)-an update
FIGURE 25. Canthigaster supramacula, young individual, Lagoa Azul, photo L.A. Rocha.
FIGURE 5 in Coastal Fishes of São Tomé and Príncipe islands, Gulf of Guinea (Eastern Atlantic Ocean)-an update
FIGURE 5. Unidentified ophichthyid, in front of Lagoa Azul, photo L.A. Rocha.
FIGURE 20 in Coastal Fishes of São Tomé and Príncipe islands, Gulf of Guinea (Eastern Atlantic Ocean)-an update
FIGURE 20. Gobius sp. aff. rubropunctatus female, Lagoa Azul, photo L.A. Rocha.
FIGURE 26 in Coastal Fishes of São Tomé and Príncipe islands, Gulf of Guinea (Eastern Atlantic Ocean)-an update
FIGURE 26. Canthigaster supramacula, old individual, Lagoa Azul, photo L.A. Rocha.
FIGURE 7 in Coastal Fishes of São Tomé and Príncipe islands, Gulf of Guinea (Eastern Atlantic Ocean)-an update
FIGURE 7. Scorpaenodes africanus, animal from Lagoa Azul, photo J.L. Gasparini.
FIGURES 17 in Coastal Fishes of São Tomé and Príncipe islands, Gulf of Guinea (Eastern Atlantic Ocean)-an update
FIGURES 17. Apletodon wirtzi, animal from Santana Island, photo CL Sampaio.
FIGURE 6 in Coastal Fishes of São Tomé and Príncipe islands, Gulf of Guinea (Eastern Atlantic Ocean)-an update
FIGURE 6. Grammonus longhursti, animal from Santana Island, photo JL Gasparini;
FIGURE 13. Typhlotanais ohtsukae n in Tanaidacea (Crustacea: Peracarida) from Japan. II. Tanaidomorpha from the East China Sea, the West Pacific Ocean and the Nansei Islands
FIGURE 13. Typhlotanais ohtsukae n. sp. A, male, lateral view, scale bar = 0.5 mm.
FIGURE 8. Typhlotanais magdalensis n in Tanaidacea (Crustacea: Peracarida) from Japan. II. Tanaidomorpha from the East China Sea, the West Pacific Ocean and the Nansei Islands
FIGURE 8. Typhlotanais magdalensis n. sp. A, holotype, female, lateral view. Scale bar = 0.5 mm.
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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)
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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.