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140 results for “tropical islands”
FIGURE 16 in Alpheid shrimps (Decapoda: Caridea) of the Trindade & Martin Vaz Archipelago, off Brazil, with new records, description of a new species of Synalpheus and remarks on zoogeographical patterns in the oceanic islands of the tropical southern Atlantic
FIGURE 16. Synalpheus brooksi Coutière, 1909, male-looking ovigerous specimen from Ceará, Brazil (MZUSP 31145): A— frontal region, dorsal view; B—pleon, lateral view; C—telson, dorsal view; D—right (major) chela, mesial view; E—left uropod, dorsal view, F —right uropod, dorsal view.
FIGURE 14 in Alpheid shrimps (Decapoda: Caridea) of the Trindade & Martin Vaz Archipelago, off Brazil, with new records, description of a new species of Synalpheus and remarks on zoogeographical patterns in the oceanic islands of the tropical southern Atlantic
FIGURE 14. Synalpheus trinitatis sp. nov., holotype, male from Enseada dos Portugueses, Trindade Island (MZUSP 30089): A—right (major) cheliped, lateral view; B—same, chela, mesial view; C—same, distal portion of chela, lateral view; D—left (minor) cheliped, lateral view; E—same, chela, mesial view.
FIGURE 13 in Alpheid shrimps (Decapoda: Caridea) of the Trindade & Martin Vaz Archipelago, off Brazil, with new records, description of a new species of Synalpheus and remarks on zoogeographical patterns in the oceanic islands of the tropical southern Atlantic
FIGURE 13. Synalpheus trinitatis sp. nov., holotype, male from Enseada dos Portugueses, Trindade Island (MZUSP 30089): A—frontal region, dorsal view; B—same, lateral view; C—pleon, lateral view; D—telson, dorsal view; E—right third maxilliped, lateral view; F, same, tip of ultimate article, mesial view; G—right second pereiopod, lateral view; H—right third pereiopod, lateral view; I—same, distal portion of propodus and dactylus, lateral view; J—right fifth pereiopod, lateral view; K—right uropod, dorsal view.
FIGURE 12 in Alpheid shrimps (Decapoda: Caridea) of the Trindade & Martin Vaz Archipelago, off Brazil, with new records, description of a new species of Synalpheus and remarks on zoogeographical patterns in the oceanic islands of the tropical southern Atlantic
FIGURE 12. Synalpheus townsendi Coutière, 1909: A, B—male from Ilha Sul, Trindade Island, Brazil (MZUSP 33268), A— dorsal view; B—lateral view; C, D—ovigerous female from Ilha Sul, Trindade Island, Brazil (MZUSP 33247), C—dorsal view; D—lateral view. Photographs by J.B. Mendonça.
FIGURE 1 in Alpheid shrimps (Decapoda: Caridea) of the Trindade & Martin Vaz Archipelago, off Brazil, with new records, description of a new species of Synalpheus and remarks on zoogeographical patterns in the oceanic islands of the tropical southern Atlantic
FIGURE 1. Trindade and Martin Vaz Archipelago (TMV): A—Position of the TMV relative to the Brazilian continental coastline and Vitória-Trindade Seamount Chain, and isobath curves around TMV; B—Trindade Island viewed from distance; C—Martin Vaz Islands viewed from distance; D–G—Trindade Island; D—rocky-sandy beach near Parcel das Tartarugas, partly exposed at low tide; E—artificial reef substrate (ARS) being deployed on hard bottom composed of large boulders among patches of sand and calcareous algae; F—mixed hard bottom characterised by numerous nodules of calcareous algae; G—irregular hard limestone bottom. A, adapted from Perreira-Filho et al. (2011); photographs by J.B. Mendonça.
FIGURE 10 in Alpheid shrimps (Decapoda: Caridea) of the Trindade & Martin Vaz Archipelago, off Brazil, with new records, description of a new species of Synalpheus and remarks on zoogeographical patterns in the oceanic islands of the tropical southern Atlantic
FIGURE 10. Alpheus rudolphi Almeida & Anker, 2011: A, B—female from Enseada dos Portugueses, Trindade Island, Brazil (MZUSP 33255), A—dorsal view; B—lateral view; C–E—in situ photographs of A. rudolphi associated with sea anemones at three localities in Brazil: C—Ilhas Rasas, Espírito Santo; D—Guarapari, Espírito Santo; E—Abrolhos, Bahia. Photographs by J.B. Mendonça (A. B), R. Macieira (C), P. Wirtz (D), M. Lisa (E).
FIGURE 11 in Alpheid shrimps (Decapoda: Caridea) of the Trindade & Martin Vaz Archipelago, off Brazil, with new records, description of a new species of Synalpheus and remarks on zoogeographical patterns in the oceanic islands of the tropical southern Atlantic
FIGURE 11. Metalpheus rostratipes (Pocock, 1890): A, B—ovigerous female from Enseada dos Portugueses, Trindade Island, Brazil (MZUSP 33293), A—dorsal view; B—lateral view. Prionalpheus gomezi Martínez-Iglesias & Carvacho, 1991: C, D— ovigerous female missing both chelipeds from Enseada dos Portugueses, Trindade Island, Brazil (MZUSP 33360), C—dorsal view; D—lateral view. Salmoneus setosus Manning & Chace, 1990: E—ovigerous specimen from between Ponta da Crista do Galo and Ponta Norte, Trindade Island, Brazil (MZUSP 33391), lateral view. Synalpheus antillensis Coutière, 1909: F—male from Enseada Orelhas, Trindade Island, Brazil (MZUSP 33286), lateral view. Synalpheus fritzmuelleri Coutière, 1909: G, H— ovigerous female from Enseada dos Portugueses, Trindade Island, Brazil (MZUSP 33248), G—dorsal view; H—lateral view. Photographs by J.B. Mendonça.
FIGURE 4 in Alpheid shrimps (Decapoda: Caridea) of the Trindade & Martin Vaz Archipelago, off Brazil, with new records, description of a new species of Synalpheus and remarks on zoogeographical patterns in the oceanic islands of the tropical southern Atlantic
FIGURE 4. Alpheus crockeri (Armstrong, 1941), female from Enseada Orelhas, Trindade Island, Brazil (MZUSP 33408): A— dorsal view; B—lateral view. Photographs by J.B. Mendonça.
FIGURE 5. Alpheus formosus Gibbes, 1850 in Alpheid shrimps (Decapoda: Caridea) of the Trindade & Martin Vaz Archipelago, off Brazil, with new records, description of a new species of Synalpheus and remarks on zoogeographical patterns in the oceanic islands of the tropical southern Atlantic
FIGURE 5. Alpheus formosus Gibbes, 1850, female from Enseada dos Portugueses, Trindade Island, Brazil (MZUSP 33276): A—dorsal view; B—lateral view. Photographs by J.B. Mendonça.
FIGURE 2. Alpheus amblyonyx Chace, 1972 in Alpheid shrimps (Decapoda: Caridea) of the Trindade & Martin Vaz Archipelago, off Brazil, with new records, description of a new species of Synalpheus and remarks on zoogeographical patterns in the oceanic islands of the tropical southern Atlantic
FIGURE 2. Alpheus amblyonyx Chace, 1972 sensu lato, ovigerous female from Ilha da Racha, Trindade Island, Brazil (MZUSP 33262): A—dorsal view; B—lateral view. Photographs by J.B. Mendonça.
FIGURE 7 in Alpheid shrimps (Decapoda: Caridea) of the Trindade & Martin Vaz Archipelago, off Brazil, with new records, description of a new species of Synalpheus and remarks on zoogeographical patterns in the oceanic islands of the tropical southern Atlantic
FIGURE 7. Alpheus peasei (Armstrong, 1940), male from Enseada Orelhas, Trindade Island, Brazil (MZUSP 33249): A— dorsal view; B—lateral view. Photographs by J.B. Mendonça.
FIGURE 9 in Alpheid shrimps (Decapoda: Caridea) of the Trindade & Martin Vaz Archipelago, off Brazil, with new records, description of a new species of Synalpheus and remarks on zoogeographical patterns in the oceanic islands of the tropical southern Atlantic
FIGURE 9. Alpheus rudolphi Almeida & Anker, 2011, male from Enseada dos Portugueses, Trindade Island, Brazil (OUMNH.ZC 2016.02.019): A—dorsal view; B—lateral view. Photographs by J.B. Mendonça.
FIGURE 3. Alpheus cristulifrons Rathbun, 1900 in Alpheid shrimps (Decapoda: Caridea) of the Trindade & Martin Vaz Archipelago, off Brazil, with new records, description of a new species of Synalpheus and remarks on zoogeographical patterns in the oceanic islands of the tropical southern Atlantic
FIGURE 3. Alpheus cristulifrons Rathbun, 1900, male from Enseada dos Portugueses, Trindade Island, Brazil (MZUSP 33280): A, B—dorsal view on different backgrounds; C—lateral view. Photographs by J.B. Mendonça.
FIGURE 6. Alpheus packardii Kingsley, 1880 in Alpheid shrimps (Decapoda: Caridea) of the Trindade & Martin Vaz Archipelago, off Brazil, with new records, description of a new species of Synalpheus and remarks on zoogeographical patterns in the oceanic islands of the tropical southern Atlantic
FIGURE 6. Alpheus packardii Kingsley, 1880 sensu lato, ovigerous female from Enseada dos Portugueses, Trindade Island, Brazil (MZUSP 33278): A—dorsal view; B—lateral view. Photographs by J.B. Mendonça.
FIGURE 8 in Alpheid shrimps (Decapoda: Caridea) of the Trindade & Martin Vaz Archipelago, off Brazil, with new records, description of a new species of Synalpheus and remarks on zoogeographical patterns in the oceanic islands of the tropical southern Atlantic
FIGURE 8. Alpheus peasei (Armstrong, 1940): A—male from Enseada dos Portugueses, Trindade Island, Brazil (MZUSP 33263), dorsal view; B—ovigerous female from Enseada Orelhas, Trindade Island, Brazil (MZUSP 33264), lateral view. Photographs by J.B. Mendonça.
Is the isotopic composition of precipitation a robust indicator for reconstructions of past tropical cyclones frequency? A case study on Réunion Island from rain and water vapor isotopic observations
<p>Isotopic composition of precipitation and water vapor and LMDZ-iso and ECHAM6-wiso simulations associated with the manuscript:</p> <p>Françoise Vimeux, Camille Risi, Christelle Barthe, Sören François, Alexandre Cauquoin, Olivier Jossoud, Jean-Marc Metzger, Olivier Cattani, Bénédicte Minster, and Martin Werner (2024). Is the isotopic composition of precipitation a robust indicator for reconstructions of past tropical cyclones frequency? A case study on Réunion Island from rain and water vapor isotopic observations. Journal of Geophysical Research: Atmospheres, 129, e2023JD039794. https://doi.org/10.1029/2023JD039794</p>
Supporting tables and figures for Cancel Villamil JJ, Locke SA (2022) - Fish assemblage response to removal of a low‐head dam in the lower reach of a tropical island river, Freshwater Biology
<p>Table S1 summarizes studies of the effects of dams on freshwater fish assemblages</p> <p>Table S2 provides results of fishing in 39 samples in three rivers in Puerto Rico in 2017-2019. See 2, below. </p> <p>Figure S1 shows the relationship between fish species richness and time spent electrofishing in these samples.</p> <p>Abstract of article:</p> <p>1. Dams are often removed from rivers to restore habitat connectivity for biota such as fish. Removal of inland dams is well studied in temperate mainland rivers but this approach has been little studied in fish assemblages in islands, tropic systems, or for dams near the mouth of the river. In Puerto Rico, one of the most intensively dammed territories in the world, all native river fishes migrate between fresh water and the sea, and previous work shows these movements are impeded or blocked by dams.</p> <p>2. Fish assemblages were compared before and after removal of the Cambalache dam, a porous, low-head structure near the mouth of the Río Grande de Arecibo, as well as in two other rivers in Western Puerto Rico, one with a similarly sized and positioned dam, and one reference river without artificial barriers. Fish were sampled using backpack electrofishing on 39 occasions during 2017-2019, including seven samples collected after removal of the Cambalache dam, at between four and six sites per river.</p> <p>3. Fish assemblages upstream from dams were poorer in species, and species richness showed a marginal tendency (P=0.0515) to increase upstream of the Cambalache dam three months after its removal. The two small lowland dams studied herein limited the upstream extent of marine species, which recolonized upstream sites of the Río Grande de Arecibo after removal of the Cambalache dam. An estimate of relative density (catch per unit effort) of common native freshwater species was higher above these two dams, and decreased at upstream sites after removal of the Cambalache dam. The estimated relative density of a native freshwater species that is of conservation concern, the American eel (Anguilla rostrata), was reduced above dams, and increased upstream of the former Cambalache dam after its removal. </p> <p>4. In extensive surveys conducted previously in Puerto Rico, sampling was concentrated higher in the watershed, and native fishes were more common and abundant below than above dams. The present work was conducted near the river mouth, and opposite results were observed. These contrasting results suggest that the effects of dams (or dam removal) on fish assemblages vary along the river gradient, although data from other systems are needed to confirm this.</p> <p>5. The present results suggest low-head dam removal to be a viable method of restoring connectivity in fish assemblages in lower reaches of rivers in Puerto Rico and, potentially, other tropical islands. Removal of dams near the mouth of the river appears to be of particular benefit to marine fish species that use lower river reaches.</p>
Data from: Ecological and environmental predictors of escape among birds on a large tropical island
<p><span><span><span><span>Ecological and environmental traits can influence avian escape behaviour but most data underpinning our current understanding relates to continental and temperate areas and species. We conducted a phylogenetically controlled comparative analysis of flight-initation distance (FID) against a variety of environmental, behavioural and life-history attributes for Sri Lankan birds (202 species; n = 2540). As with other studies, body mass was positively associated with FID, and longer FIDs occurred in areas where human population density was lower. We also found that the effect of human population density was more pronounced in larger birds. Birds that were in groups when approached tended to have longer FIDs. Unlike the findings of other comparative analyses, based mostly on continental, temperate populations, most other ecological variables did not feature in the best models predicting FID (time of year, breeding system, clutch size, habitat, migratory behaviour, development [altricial/precocial], elevation and diet). Thus, some associations (body mass and exposure to humans) may be universal, while others may not manifest themselves among tropical avifaunas. Further tropical datasets are required to confirm truly universal associations of environmental and ecological attributes and escape distances among birds.</span></span></span></span></p>
Lampronycteris brachyotis Smithsonian Tropical Research Institute, Barro Colorado Island, Panama. Photo: Christian Ziegler/age fotostock in Phyllostomidae
Lampronycteris brachyotis Smithsonian Tropical Research Institute, Barro Colorado Island, Panama. Photo: Christian Ziegler/age fotostock
Allochthonous resources are less important for faunal communities on highly productive, small tropical islands
<p><span>Ecosystems are interconnected by energy fluxes that provide resources for the inhabiting organisms along the transition zone. Especially where in-situ production is low, ecosystems can become highly dependent on external resources. The dependency on external input becomes less pronounced in systems with elevated in-situ production, where only consumer species close to the site of external input remain subsidized, whereas species distant to the input site rely on the in-situ production of the ecosystem. It is largely unclear though if this pattern is consistent over different consumer species and trophic levels in one ecosystem, and whether consumer species that occur both proximate to and at a distance from the input site differ in their dependency on external resource inputs between sites. Using stable isotope analysis, we investigated the dependency on external marine input for common ground-associated consumer taxa on small tropical islands with high in-situ production. We show that marine input is only relevant for strict beach-dwelling taxa, while the terrestrial vegetation is the main carbon source for inland-dwelling taxa. Consumer species that occurred both close (beach) and distant (inland) to the site of marine input showed similar proportions of marine input in their diets. This supports earlier findings that the relevance of external resources becomes limited to species close to the input site in systems with sufficient in-situ production. However, it also indicates that the relevance of external input is also species-dependent, as consumers occurring close and distant to the input site depended equally strong or weak on marine input.</span></p>
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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.