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2,991 results for “indian ocean”
Data from: Disentangling drivers of the abundance of coral reef fishes in the Western Indian Ocean
Aim: Understanding the drivers of the structure of coral reef fish assemblages is vital for their future conservation. Quantifying the separate roles of natural drivers from the increasing influence of anthropogenic factors, such as fishing and climate change, is a key component of this understanding. It follows that the intrinsic role of historical biogeographical and geomorphological factors must be accounted for when trying to understand the effects of contemporary disturbances such as fishing. Location: Comoros, Madagascar, Mozambique and Tanzania, western Indian Ocean (WIO). Methods: We modelled patterns in the density and biomass of an assemblage of reef-associated fish species from 11 families, and their association with 16 bio-physical variables. Results: Canonical Analysis of Principal Coordinates revealed strong country affiliations of reef fish assemblages and distance-based linear modelling confirmed geographic location and reef geomorphology were the most significant correlates, explaining 32% of the observed variation in fish assemblage structure. Another 6-8% of variation was explained by productivity gradients (chl_a), and reef exposure or slope. Where spatial effects were not significant between mainland continental locations, fishing effects became evident explaining 6% of the variation in data. No correlation with live coral was detected. Only 37 species, predominantly lower trophic level taxa, were significant in explaining differences in assemblages between sites. Main Conclusions: Spatial and geomorphological histories remain a major influence on the structure of reef fish assemblages in the WIO. Reef geomorphology was closely linked to standing biomass, with 'ocean-exposed' fringing reefs supporting high average biomass of ~1,000 kg/ha, while 'lagoon-exposed fringing' reefs and 'inner seas patch complex' reefs yielded substantially less at ~500kg/ha. Further, the results indicate the influence of benthic communities on fish assemblages is scale dependent. Such insights will be pivotal for managers seeking to balance long-term sustainability of artisanal reef fisheries with conservation of coral reef systems.
Data from: Population differentiation or species formation across the Indian and the Pacific Oceans? An example from the brooding marine hydrozoan Macrorhynchia phoenicea
Assessing population connectivity is necessary to construct effective marine protected areas. This connectivity depends, among other parameters, inherently on species dispersal capacities. Isolation by distance (IBD) is one of the main modes of differentiation in marine species, above all in species presenting low dispersal abilities. This study reports the genetic structuring in the tropical hydrozoan Macrorhynchia phoenicea α (sensu Postaire et al., 2016a), a brooding species, from 30 sampling sites in the Western Indian Ocean and the Tropical Southwestern Pacific, using 15 microsatellite loci. At the local scale, genet dispersal relied on asexual propagation at short distance, which was not found at larger scales. Considering one representative per clone, significant positive FIS values (from −0.327*** to 0.411***) were found within almost all sites. Gene flow was extremely low at all spatial scales, among sites within islands (<10 km distance) and among islands (100 to >11,000 km distance), with significant pairwise FST values (from 0.035*** to 0.645***). A general pattern of IBD was found at the Indo-Pacific scale, but also within ecoregions in the Western Indian Ocean province. Clustering and network analyses identified each island as a potential independent population, while analysis of molecular variance indicated that population genetic differentiation was significant at small (within island) and intermediate (among islands within province) spatial scales. As shown by this species, a brooding life cycle might be corollary of the high population differentiation found in some coastal marine species, thwarting regular dispersal at distances more than a few kilometers and probably leading to high cryptic diversity, each island housing independent evolutionary lineages.
Data from: Population differentiation of 2 forms of Bryde's whales in the Indian and Pacific Oceans
Accurate identification of units for conservation is particularly challenging for marine species as obvious barriers to gene flow are generally lacking. Bryde's whales (Balaenoptera spp.) are subject to multiple human-mediated stressors, including fisheries bycatch, ship strikes, and scientific whaling by Japan. For effective management, a clear understanding of how populations of each Bryde's whale species/subspecies are genetically structured across their range is required. We conducted a population-level analysis of mtDNA control region sequences with 56 new samples from Oman, Maldives, and Bangladesh, plus published sequences from off Java and the Northwest Pacific. Nine diagnostic characters in the mitochondrial control region and a maximum parsimony phylogenetic analysis identified 2 genetically recognized subspecies of Bryde's whale: the larger, offshore form, B. edeni brydei, and the smaller, coastal form, B. e. edeni. Genetic diversity and differentiation indices, combined with a reconstructed maximum parsimony haplotype network, indicate strong differences in the genetic diversity and population structure within each subspecies. Discrete population units are identified for B. e. brydei in the Maldives, Java, and the Northwest Pacific, and for B. e. edeni between the Northern Indian Ocean (Oman and Bangladesh) and the coastal waters of Japan.
FIGURE 8 in Two new species of Deutella Mayer, 1890 (Crustacea: Amphipoda: Pariambidae) collected by the R. V. " Anton Bruun " during the International Indian Ocean Expedition 1963 1964
FIGURE 8. Deutella indica sp. nov. AF, male. A, pereopod 3; B, pereopod 4; C, pereopod 5; D, pereopod 6; E, pereopod 7; F, abdomen (ventral view). G, female abdomen (ventral view). Scale bars: A,B: 0.05 mm; CE: 0.5 mm; F,G: 0.1 mm.
FIGURE 7 in Two new species of Deutella Mayer, 1890 (Crustacea: Amphipoda: Pariambidae) collected by the R. V. " Anton Bruun " during the International Indian Ocean Expedition 1963 1964
FIGURE 7. Deutella indica sp. nov. A, male dorsal view; B, female dorsal view; C, male antenna 1; D, male antenna 2; E, male gnathopod 1; F, male gnathopod 2; G, female gnathopod 2. Scale bars: A,B: 1 mm; C,D: 0.5 mm; E: 0.3 mm; F,G: 0.5 mm.
FIGURE 4 in Two new species of Deutella Mayer, 1890 (Crustacea: Amphipoda: Pariambidae) collected by the R. V. " Anton Bruun " during the International Indian Ocean Expedition 1963 1964
FIGURE 4. Deutella antonbruuni sp. nov. AE, male. A, pereopod 3; B, pereopod 4; C, pereopod 6; D, pereopod 7; E, abdomen (ventral view). F, female abdomen (ventral view). Scale bars: A,B: 0.05 mm; C,D: 0.5 mm; E,F: 0.1 mm.
FIGURE 2 in Two new species of Deutella Mayer, 1890 (Crustacea: Amphipoda: Pariambidae) collected by the R. V. " Anton Bruun " during the International Indian Ocean Expedition 1963 1964
FIGURE 2. Deutella antonbruuni sp. nov. Male. A, upper lip; B, lower lip; C, maxilliped; D, left mandible; E, right mandible; F, maxilla 1; G, maxilla 2. Scale bars: 0.05 mm.
FIGURE 3 in Two new species of Deutella Mayer, 1890 (Crustacea: Amphipoda: Pariambidae) collected by the R. V. " Anton Bruun " during the International Indian Ocean Expedition 1963 1964
FIGURE 3. Deutella antonbruuni sp. nov. A, male dorsal view; B, female dorsal view; C, male antenna 1; D, male antenna 2; E, male gnathopod 1; F, male gnathopod 2; G, female gnathopod 2. Scale bars: A,B: 1 mm; C,D: 0.3 mm; E: 0.2 mm; F,G: 0.5 mm.
FIGURE 6 in Two new species of Deutella Mayer, 1890 (Crustacea: Amphipoda: Pariambidae) collected by the R. V. " Anton Bruun " during the International Indian Ocean Expedition 1963 1964
FIGURE 6. Deutella indica sp. nov. Male. A, upper lip; B, lower lip; C, maxilliped; D, right mandible; E, left mandible; F, maxilla 1; G, maxilla 2. Scale bars: 0.1 mm.
FIGURE 5. Metaprotella mauritiensis n in The Caprellidea (Crustacea: Amphipoda) from Mauritius Island, Western Indian Ocean
FIGURE 5. Metaprotella mauritiensis n. sp. A, maxilliped; B, lower lip; C, upper lip; D, right mandible; E, left mandible; F, maxilla 2; G, maxilla 1. Scale bars: 0.1 mm.
FIGURE 10 in The Caprellidea (Crustacea: Amphipoda) from Mauritius Island, Western Indian Ocean
FIGURE 10. Orthoprotella australis (Haswell, 1880). Lateral view. A, male; B, female. Scale bar: 1 mm.
FIGURE 4. Metaprotella mauritiensis n in The Caprellidea (Crustacea: Amphipoda) from Mauritius Island, Western Indian Ocean
FIGURE 4. Metaprotella mauritiensis n. sp. Lateral view. A, holotype male; B, paratype male; C, allotype female. Scale bar: 1 mm.
FIGURE 6. Metaprotella mauritiensis n in The Caprellidea (Crustacea: Amphipoda) from Mauritius Island, Western Indian Ocean
FIGURE 6. Metaprotella mauritiensis n. sp. A–D, male. A, antenna 1; B, antenna 2; C, gnathopod 1; D, gnathopod 2. E, female gnathopod 2. Scale bars: A,C,E: 1 mm; B: 0.2 mm; D: 0.5 mm.
FIGURE 14. Sinobatis kotlyari n in A new deepwater legskate, Sinobatis kotlyari n. sp. (Rajiformes, Anacanthobatidae) from the southeastern Indian Ocean on Broken Ridge
FIGURE 14. Sinobatis kotlyari n. sp., holotype male 331 mm TL, ZMMU P-17178, dissected right clasper skeleton in dorsal (A), opened (B) and ventral (C) views—with ventral terminal, accessory terminal 1 and 2 cartilages removed.
FIGURE 11. Sinobatis kotlyari n in A new deepwater legskate, Sinobatis kotlyari n. sp. (Rajiformes, Anacanthobatidae) from the southeastern Indian Ocean on Broken Ridge
FIGURE 11. Sinobatis kotlyari n. sp., holotype male 331 mm TL, ZMMU P-17178, tail end with caudal fin and papillae.
FIGURE 12. Sinobatis kotlyari n in A new deepwater legskate, Sinobatis kotlyari n. sp. (Rajiformes, Anacanthobatidae) from the southeastern Indian Ocean on Broken Ridge
FIGURE 12. Sinobatis kotlyari n. sp., holotype male 331 mm TL, ZMMU P-17178, right clasper glans opened. Dashed lines at slit and sentina 1 indicate cavities, at shield proximal contour of underlying ventral terminal cartilage.
FIGURE 16. Sinobatis kotlyari n in A new deepwater legskate, Sinobatis kotlyari n. sp. (Rajiformes, Anacanthobatidae) from the southeastern Indian Ocean on Broken Ridge
FIGURE 16. Sinobatis kotlyari n. sp., holotype male 331 mm TL, ZMMU P-17178, right clasper skeleton combined accessory terminal 1 and 2 cartilages in ventral (A) and dorsal (B) views.
FIGURE 10. Sinobatis kotlyari n in A new deepwater legskate, Sinobatis kotlyari n. sp. (Rajiformes, Anacanthobatidae) from the southeastern Indian Ocean on Broken Ridge
FIGURE 10. Sinobatis kotlyari n. sp., holotype male 331 mm TL, ZMMU P-17178, left (A) and right (B) alar thorn fields with surrounding papillae.
FIGURE 7. Sinobatis kotlyari n in A new deepwater legskate, Sinobatis kotlyari n. sp. (Rajiformes, Anacanthobatidae) from the southeastern Indian Ocean on Broken Ridge
FIGURE 7. Sinobatis kotlyari n. sp., holotype male 331 mm TL, ZMMU P-17178, close-up of mouth-nasal region.
FIGURE 9. Sinobatis kotlyari n in A new deepwater legskate, Sinobatis kotlyari n. sp. (Rajiformes, Anacanthobatidae) from the southeastern Indian Ocean on Broken Ridge
FIGURE 9. Sinobatis kotlyari n. sp., holotype male 331 mm TL, ZMMU P-17178, pelvic region with tail origin and pair of claspers in ventral view.
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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)
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.