Find research datasets worth reusing
Search datasets from major research repositories and use ShareScore to quickly assess how well each record supports discovery, access, and reuse.
211
datasets available to search
ShareScore release 0.9.0
Dataset results
211 results for “tropical fish”
Environmental DNA metabarcoding to monitor tropical reef fishes in Providencia island
Open the record for dataset details and reuse information.
Variation in functional composition of reef fishes along a tropical to temperate gradient
Open the record for dataset details and reuse information.
Morphological traits mediate fish occurrences in oil palm-impacted tropical streams
Open the record for dataset details and reuse information.
Data from: Freshwater fish functional diversity shows diverse responses to human activities, but consistently declines in the tropics
Open the record for dataset details and reuse information.
Floods connect tropical river-floodplain food webs but shrink fish community isotopic trophic niches
Open the record for dataset details and reuse information.
Critical thermal maxima of early life stages of three tropical fishes: effects of rearing temperature and experimental heating rate
Open the record for dataset details and reuse information.
Data from: Species richness of trophic guilds increases with discharge and decreases with variability in tropical river fish communities
Open the record for dataset details and reuse information.
Whole genome assembly and annotation of the King Angelfish (Holacanthus passer) gives insight into the evolution of marine fishes of the Tropical Eastern Pacific
Open the record for dataset details and reuse information.
Structure of small tropical islands freshwater fish and crustacean communities: a niche- or dispersal-based process?
Determining the relative importance of niche- and dispersal-based processes in the structuring of animal communities is central in ecology. Freshwater fish and crustacean communities of small tropical islands can bring new insights for understanding these processes as all their species present a pelagic larval stage which gives them important dispersal capacities. Consequently, we hypothesized that dispersal-based process maybe preponderant for structuring these communities from the regional- to the local, i.e. survey site, scales. Gradient forest analyses allowed us to model the effect of 12 environmental variables on freshwater taxa abundances in two southwestern Indian Ocean islands: Mayotte (26 taxa) and Reunion (21). A total of 153 surveys in Mayotte and 266 in Reunion were used for building the models. Despite the strong heterogeneity of environmental conditions between the two islands, the main factors structuring freshwater fish and crustacean communities in both islands were the elevation and the slope of the sites. The observed structure appeared more pronounced for predatory species than for primary consumers and omnivores. As predators generally have limited locomotor capacities, it is concluded that dispersal-based process structures these communities not only at large geographical scales but also at the intra-watershed scale, by limiting the inland penetration (or dispersion) of species in relation to their locomotor capacities. However, more knowledge concerning ecological traits and taxonomic status of many species is needed to confirm this assumption.
FIGURE 5 in Two new miniature silverside fishes of the genus Membras Bonaparte (Atheriniformes, Atherinopsidae) from the Tropical North Atlantic Ocean
FIGURE 5. Shape space: principal components of Procrustes-aligned, scale-adjusted shape space (= relative warps); 99% confidence limits shown for each species, the dots indicate the centroid value for each species; the dashed line in the Membras martinica ellipse demarcates the area of the ellipse occupied by individuals less than 45 mm SL. The ellipses are: 1 Membras martinca; 2 M. analis; 3 M. dissimilis; 4. M. procera sp. nov.; 5 M. argentea; 6 M. pygmaea sp. nov.
FIGURE 2 in Two new miniature silverside fishes of the genus Membras Bonaparte (Atheriniformes, Atherinopsidae) from the Tropical North Atlantic Ocean
FIGURE 2. Map of Honduras to northern Colombia showing the localities for Membras pygmaea sp. nov., Brus Lagoon, Honduras and M. procera sp. nov., Gulf of Urabá, Colombia.
FIGURE 4 in Two new miniature silverside fishes of the genus Membras Bonaparte (Atheriniformes, Atherinopsidae) from the Tropical North Atlantic Ocean
FIGURE 4. Outline of Membras pygmaea sp. nov., showing the landmarks that were digitized. The dashed line on the ventral side indicates the location of the anal pore. The digitized landmarks: 1 tip of snout; 2 posterior margin of occiput; 3 origin of spinous dorsal fin; 4 origin of second dorsal fin; 5 terminus of second dorsal fin; 6 posterior margin of hypural plate; 7 terminus of anal fin; 8 origin of anal fin; 9 insertion of pelvic fin; 10 posterior bony margin of head; 11 insertion of pectoral fin; 12 posterior extent of gular region; 13 posterior margin of orbit; 14 anterior margin of orbit; 15 posterior margin of upper jaw.
FIGURE 1 in Two new miniature silverside fishes of the genus Membras Bonaparte (Atheriniformes, Atherinopsidae) from the Tropical North Atlantic Ocean
FIGURE 1. Map of southern Central America and South America showing the distribution of the miniature species of the Membras martinica species-group as follows: (i) star—M. pygmaea sp. nov., Brus Lagoon, Honduras; (ii) triangle—M. procera sp. nov., Gulf of Urabá, Colombia; (iii) circle—M. argentea, off Sabanilla, Colombia; (iv) arrow—M. analis, off Lago Maracaibo, Venezuela; and (v) square—M. dissimilis, off Cananéia, Brazil.
FIGURE 3. A in Two new miniature silverside fishes of the genus Membras Bonaparte (Atheriniformes, Atherinopsidae) from the Tropical North Atlantic Ocean
FIGURE 3. A. Membras pygmaea sp. nov., holotype, FMNH 117282, 40.2 mm SL. B. Membras procera sp. nov., holotype, ANSP 153427, 36.6 mm SL.
FIGURE 6 in Two new miniature silverside fishes of the genus Membras Bonaparte (Atheriniformes, Atherinopsidae) from the Tropical North Atlantic Ocean
FIGURE 6. Deformation grids among landmarks for the shape space in Figure 5. The vectors coming off the grids indicate: i) the magnitude of the changes such that individuals with higher scores (to the right of PC1 or the top of PC2) are enlarged morphologically; and ii) the directions of the displacement of the landmarks.
Data from: Cardiac plasticity influences aerobic performance and thermal tolerance in a tropical, freshwater fish at elevated temperatures
Fishes faced with novel thermal conditions often modify physiological functioning to compensate for elevated temperatures. This physiological plasticity (thermal acclimation) has been shown to improve metabolic performance and extend thermal limits in many species. Adjustments in cardiorespiratory function are often invoked as mechanisms underlying thermal plasticity because limitations in oxygen supply have been predicted to define thermal optima in fishes, however few studies have explicitly linked cardiorespiratory plasticity to metabolic compensation. Here we quantify thermal acclimation capacity in the commercially harvested Nile perch (Lates niloticus) of East Africa, and investigate mechanisms underlying observed changes. We reared juvenile Nile perch for 3 months under two temperature regimes, and then measured a series of metabolic traits (e.g., aerobic scope, AS) and critical thermal maximum (CTmax) upon acute exposure to a range of experimental temperatures. We also measured morphological traits of heart ventricles, gills, and brains to identify potential mechanisms for compensation. We found that long-term (3-months) exposure to elevated temperature induced compensation in upper thermal tolerance (CTmax) and metabolic performance (SMR, MMR and AS), and induced cardiac remodeling in Nile perch. Furthermore, variation in heart morphology influenced variations in metabolic function and thermal tolerance. These results indicate that plastic changes enacted over longer exposures lead to differences in metabolic flexibility when acutely exposed to temperature variation. Furthermore, we established functional links between cardiac plasticity, metabolic performance, and thermal tolerance, providing evidence that plasticity in cardiac capacity may be one mechanism for coping with climate change.
Data from: Water and fish select for fleshy fruits in tropical wetland forests
Adjacent floodplain and upland tropical forests experience the same temperature and precipitation regimes, but differ substantially in plant species composition and biotic interactions because of extensive flooding. We hypothesize that flooded forests filter fruiting traits linked to seed dispersal by water and fishes, such that selection by water and fish led to (1) trees that synchronize the timing of fruiting with annual floods, and (2) the evolution of fleshy tissues on fruits to improve buoyancy and increase fruit consumption rates by fish. To test this hypothesis, we compared plant communities in seasonally flooded forests and adjacent upland forest in terms of fruiting phenology, the frequency of trees bearing fleshy-fruit, and the role of fleshy tissues in buoyancy and seed viability. Beta-diversity in this system is high, with significant differences in species composition across habitats. As predicted, the production of ripe fleshy fruits was significantly greater in flooded than upland forests during the flood season. Furthermore, we found that trees with fleshy fruit were significantly more abundant in flooded forests even though species richness of fleshy-fruit bearing trees was proportionally similar in flooded and upland forests. Additionally, fleshy pulp increased buoyancy. Likewise, time afloat decreased for denser fruit and those with high seed to pulp ratios. In concert, these results suggest that fleshy fruits in Neotropical floodplain forests facilitated hydrochory and ichthyochory. Once established, water and fish became important agents of selection on fruiting traits.
Data from: A revision of the bioregionalisation of freshwater fish communities in the Australian Monsoonal Tropics
The Australian freshwater fish fauna is very unique, but poorly understood. In the Australian Monsoonal Tropics (AMT) biome of northern Australia, the number of described and candidate species has nearly doubled since the last attempt to analyse freshwater fish species composition patterns and determine a bioregionalisation scheme. Here, we utilise the most complete database of catchment‐scale freshwater fish distributions from the AMT to date to: (a) reanalyze spatial patterns of species richness, endemism and turnover of freshwater fishes; (b) propose a biogeographic regionalisation based on species turnover; (c) assess the relationship between species turnover and patterns of environmental change and historic drainage connectivity; and (d) identify sampling gaps. Biogeographic provinces were identified using an agglomerative cluster analysis of a Simpson's beta (βsim) dissimilarity matrix. A generalised dissimilarity model incorporating eighteen environmental variables was used to investigate the environmental correlates of species turnover. Observed and estimated species richness and endemism were calculated and inventory completeness was estimated based on the ratio of observed to estimated species richness. Three major freshwater fish biogeographic provinces and 14 subprovinces are proposed. These differ substantially from the current bioregionalisation scheme. Species turnover was most strongly influenced by environmental variables that are interpreted to reflect changes in terrain (catchment relief and confinement), geology and climate (runoff perenniality, stream density), and biotic responses to climate (net primary productivity). Past connectivity between rivers during low sea‐level events is also influential highlighting the importance of historical processes in explaining contemporary patterns of biodiversity in the AMT. The inclusion of 49 newly discovered species and candidate species only reinforced known focal points of species richness and endemism in the AMT. However, a number of key sampling gaps remain that need to be filled to fully characterise the proposed bioregionalisation.
Data from: Incomplete datasets obscure associations between traits affecting dispersal ability and geographic range size of reef fishes in the Tropical Eastern Pacific
Dispersal is thought to be an important process determining range size, especially for species in highly spatially structured habitats, such as tropical reef fishes. Despite intensive research efforts, there is conflicting evidence about the role of dispersal on determining range size. We hypothesize that traits related to dispersal drive range sizes, but that complete and comprehensive datasets are essential for detecting relationships between species' dispersal ability and range size. We investigate the roles of six traits affecting several stages of dispersal (adult mobility, spawning mode, pelagic larval duration (PLD), body size, aggregation behaviour and circadian activity), in explaining range size variation of reef fishes in the Tropical Eastern Pacific (TEP). All traits, except for PLD (148 species), had data for all 497 species in the region. Using a series of models, we investigated which traits were associated with large range sizes, when analysing all TEP species or only species with PLD data. Furthermore, using null models, we analysed whether the PLD-subset is representative of the regional species pool. Several traits affecting dispersal ability were strongly associated with range size, although these relationships could not be detected when using the PLD-data subset. Pelagic spawners (allowing for passive egg dispersal) had on average 56% larger range sizes than non-pelagic spawners. Species with medium or high adult mobility had on average a 25% or 33% larger range, respectively, than species with low mobility. Null models showed that the PLD-subset was non-representative of the regional species pool, explaining why model outcomes using the PLD-subset differed from the ones based on the complete dataset. Our results show that in the TEP, traits affecting dispersal ability are important in explaining range size variation. Using a regionally complete dataset was crucial for detecting the theoretically expected, but so far empirically unresolved, relationship between dispersal and range size.
Data from: Mating system variability in a mouthbrooding cichlid fish from a tropical lake
Intraspecific variability in mating behavior and disparities between social and reproductive behavior add complexity to the description of animal mating systems. A previously published field study on a population of the maternally mouthbrooding cichlid fish Ctenochromis horei in the north of Lake Tanganyika suggested mate monopolization by the most dominant male. In the present study, genetic reconstructions of paternity in a population in the south of the lake provided no evidence for male mate monopolization, as none of the inferred sires had offspring in more than one brood. The ability to reconstruct sire genotypes from offspring alleles was confirmed by computer simulations. Multiple paternity occurred in several broods and was significantly more frequent in the sample taken in the rainy season than in the dry season sample (100% of broods versus 12.5%, respectively; p = 0.0014). The data suggest geographic and temporal variation in the mating behavior of C. horei despite its continuous year-round reproduction, invariable brood care behavior and habitat-specific distribution in the relatively constant and confined environment of a tropical lake. Moreover, our data show that inferences on the distribution of male reproductive success, if based on each geographical or temporal data set alone, would fail to describe the potential for sexual selection in this species.
ScienceDex guides
Understand access before you commit
These curated guides explain access requirements, typical timelines, costs, and reuse considerations for widely used research datasets.
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.