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.
93
datasets available to search
ShareScore release 0.9.0
Dataset results
93 results for “fish biodiversity”
No state change in pelagic fish production and biodiversity during the Eocene-Oligocene Transition
The Eocene-Oligocene (E/O) boundary ~33.9 million years ago, has been described as a state change in the Earth system marked by the permanent glaciation of Antarctica and a proposed increase in oceanic productivity. Here we quantified the response of fish production and biodiversity to this event using microfossil fish teeth (ichthyoliths) in seven deep-sea sediment cores from around the world. Ichthyolith accumulation rate (a proxy for fish biomass production) shows no synchronous trends across the E/O. Ichthyolith accumulation in the Southern Ocean and Pacific Gyre sites is an order of magnitude lower than the equatorial and Atlantic sites, demonstrating that the Southern Ocean was not a highly productive ecosystem for fish before or after the E/O. Further, tooth morphotype diversity and assemblage composition remained stable across the interval, indicating little change in the biodiversity or ecological role of open ocean fish. While the E/O boundary was a major global climate change event, its impact on pelagic fish was relatively muted. Our results support recent findings of whale and krill diversification which suggest that the pelagic ecosystem restructuring commonly attributed to the E/O transition likely occurred much later, in the late Oligocene or Miocene.
Data from: Spatial representativeness of environmental DNA metabarcoding signal for fish biodiversity assessment in a natural freshwater system
In the last few years, the study of environmental DNA (eDNA) has drawn attention for many reasons, including its advantages for monitoring and conservation purposes. So far, in aquatic environments, most of eDNA research has focused on the detection of single species using species-specific markers. Recently, species inventories based on the analysis of a single generalist marker targeting a larger taxonomic group (eDNA metabarcoding) have proven useful for bony fish and amphibian biodiversity surveys. This approach involves in situ filtering of large volumes of water followed by amplification and sequencing of a short discriminative fragment from the 12S rDNA mitochondrial gene. In this study, we went one step further by investigating the spatial representativeness (i.e. ecological reliability and signal variability in space) of eDNA metabarcoding for large-scale fish biodiversity assessment in a freshwater system including lentic and lotic environments. We tested the ability of this approach to characterize large-scale organization of fish communities along a longitudinal gradient, from a lake to the outflowing river. First, our results confirm that eDNA metabarcoding is more efficient than a single traditional sampling campaign to detect species presence, especially in rivers. Second, the species list obtained using this approach is comparable to the one obtained when cumulating all traditional sampling sessions since 1995 and 1988 for the lake and the river, respectively. In conclusion, eDNA metabarcoding gives a faithful description of local fish biodiversity in the study system, more specifically within a range of a few kilometers along the river in our study conditions, i.e. longer than a traditional fish sampling site.
Data from: Fish functional traits correlated with environmental variables in a temperate biodiversity hotspot
The global biodiversity crisis has invigorated the search for generalized patterns in most disciplines within the natural sciences. Studies based on organismal functional traits attempt to broaden implications of results by identifying the response of functional traits, instead of taxonomic units, to environmental variables. Determining the functional trait responses enables more direct comparisons with, or predictions for, communities of different taxonomic composition. The North American freshwater fish fauna is both diverse and increasingly imperiled through human mediated disturbances, including climate change. The Tennessee River, USA, contains one of the most diverse assemblages of freshwater fish in North America and has more imperiled species than other rivers, but there has been no trait-based study of community structure in the system. We identified 211 localities in the upper Tennessee River that were sampled by the Tennessee Valley Authority between 2009 and 2011 and compiled fish functional traits for the observed species and environmental variables for each locality. Using fourth corner analysis, we identified significant correlations between many fish functional traits and environmental variables. Functional traits associated with an opportunistic life history strategy were correlated with localities subject to greater land use disturbance and less flow regulation, while functional traits associated with a periodic life history strategy were correlated with localities subject to regular disturbance and regulated flow. These are patterns observed at the continental scale highlighting the generalizability of trait-based methods. Contrary to studies that found no community structure differences when considering riparian buffer zones, we found that fish functional traits were correlated with different environmental variables between analyses with buffer zones vs. entire catchment area land cover proportions. Using existing databases and fourth corner analysis, our results support the broad application potential for trait-based methods and indicate trait-based methods can detect environmental filtering by riparian zone land cover.
Data from: Biodiversity inventories and conservation of the marine fishes of Bootless Bay, Papua New Guinea
BACKGROUND: The effective management and conservation of biodiversity is predicated on clearly defined conservation targets. Species number is frequently used as a metric for conservation prioritization and monitoring changes in ecosystem health. We conducted a series of synoptic surveys focusing on the fishes of the Bootless Bay region of Papua New Guinea to generate a checklist of fishes of the region. Bootless Bay lies directly south of Port Moresby, the capital of Papua New Guinea, and experiences the highest human population density of any marine area in the country. Our checklist will set a baseline against which future environmental changes can be tracked RESULTS: We generated a checklist of 488 fish species in 72 families found in Bootless Bay during a two-week sampling effort. Using incident-based methods of species estimation, we extrapolate there to be approximately 940 fish species in Bootless Bay, one of the lowest reported numbers in Papua New Guinea. CONCLUSIONS: Our data suggest that the Bootless Bay ecosystem of Papua New Guinea, while diverse in absolute terms, has lower fish biodiversity compared to other shallow marine areas within the country. These differences in faunal diversity, are most likely a combination of unequal sampling effort as well as biophysical factors within Bootless Bay compounded by historical and/or contemporary anthropogenic disturbances.
Data from: Influence of the geography of speciation on current patterns of coral reef fish biodiversity across the Indo-Pacific
The role of speciation processes in shaping current biodiversity patterns represents a major scientific question for ecologists and biogeographers. Hence, numerous methods have been developed to determine the geography of speciation based on co-occurrence between sister-species. Most of these methods rely on the correlation between divergence time and several metrics based on the geographic ranges of sister-taxa (i.e. overlap, asymmetry). The relationship between divergence time and these metrics has scarcely been examined in a spatial context beyond regression curves. Mapping this relationship across spatial grids, however, may unravel how speciation processes have shaped current biodiversity patterns through space and time. This can be particularly relevant for coral reef fishes of the Indo-Pacific since the origin of the exceptional concentration of biodiversity in the Indo-Australian Archipelago (IAA) has been actively debated, with several alternative hypotheses involving species diversification and dispersal. We reconstructed the phylogenetic relationships between three species-rich families of coral reef fish (Chaetodontidae, Labridae, Pomacentridae) and calculated co-occurrence metrics between closely related lineages of those families. We demonstrated that repeated biogeographic processes can be identified in present-day species distribution by projecting co-occurrence metrics between related lineages in a geographical context. Our study also evidence that sister-species do not co-occur randomly across the Indo-Pacific, but tend to overlap their range within the IAA. We identified the imprint of two important biogeographic processes that caused this pattern in 48% of the sister-taxa considered: speciation events within the IAA and repeated divergence between the Indian and Pacific Ocean, with subsequent secondary contact in the IAA.
FIGURE 1 in An annotated list of fish parasites (Copepoda, Monogenea, Digenea, Cestoda and Nematoda) collected from Emperors and Emperor Bream (Lethrinidae) in New Caledonia further highlights parasite biodiversity estimates on coral reef fish
FIGURE 1. Species of Hatschekia collected from lethrinid hosts, all drawn to same scale. A. Hatschekia gracilis Yamaguti, 1954; B. Hatschekia new species 12; C. Hatschekia cf. elegans Kabata, 1991; D. Hatschekia new species 16; E. Hatschekia new species 13; F. Hatschekia new species 14, G. Hatschekia new species 15.
FIGURE 1 in Biodiversity of hillstream fishes in Bangladesh
FIGURE 1. Sampling sites in hillstream areas of Bangladesh. 1) Cox's Bazar District: A, Himchori; B, Barachora; C, Kudung Cave. 2) Bandarban District: A, Sangu River; B, Shailopropat. 3) Chittagong District: Chittagong University Waterfall. 4) Sylhet District: A, Piyang River; B, Madhabkundo Waterfall. 5) Netrokona District: A, Kangsha River; B, Someshwari River; C, Gopalpur Hill Stream.
Complementary molecular and visual sampling of fish on oil and gas platforms provides superior biodiversity characterisation
<p>Raw data output from Fish and Elasmobranch surveys on oil platforms in the Gulf of Thailand</p>
Supplementary material 1 from: Mumladze L, Kuljanishvili T, Japoshvili B, Epitashvili G, Kalous L, Vilizzi L, Piria M (2022) Risk of invasiveness of non-native fishes in the South Caucasus biodiversity and geopolitical hotspot. In: Giannetto D, Piria M, Tarkan AS, Zięba G (Eds) Recent advancements in the risk screening of freshwater and terrestrial non-native species. NeoBiota 76: 109-133. https://doi.org/10.3897/neobiota.76.82776
Combined AS-ISK report including the 96 screenings for the 32 fish species screened for the South Caucasus
Arctic Biodiversity: Arctic Marine Fishes
Biogeography and other attributes for Arctic organisms, various sources.<p></p>
Arctic Biodiversity: Arctic Freshwater Fishes
Biogeography and other attributes for Arctic organisms, various sources.<p></p>
Data from: Environmental DNA reveals quantitative patterns of fish biodiversity in large rivers despite its downstream transportation
Despite the ecological and societal importance of large rivers, fish sampling remains costly and limited to specific habitats (e.g., river banks). Using an eDNA metabarcoding approach, we regularly sampled 500 km of a large river (Rhône River). Comparisons with long-term electrofishing surveys demonstrated the ability of eDNA metabarcoding to qualitatively and quantitatively reveal fish assemblage structures (relative species abundance) but integrated a larger space than the classical sampling location. Combination of a literature review and field data showed that eDNA behaves in the water column like fine particulate organic matter. Its detection distance varied from a few km in a small stream to more than 100 km in a large river. To our knowledge, our results are the first demonstration of the capacity of eDNA metabarcoding to describe longitudinal fish assemblage patterns in a large river, and metabarcoding appears to be a reliable, cost-effective method for future monitoring.
FIGURE 4 in Mediterranean fish biodiversity: an updated inventory with focus on the Ligurian and Tyrrhenian seas
FIGURE 4. Specific richness (S), family diversity index H' and equitability (J) for the whole Mediterranean (bold in the central square) and intra-mediterranean areas studied (bold). Values indicated by Quignard and Tomasini (2000) for different Mediterranean areas are also given.
FIGURE 7 in Mediterranean fish biodiversity: an updated inventory with focus on the Ligurian and Tyrrhenian seas
FIGURE 7. Zenopsis conchifer, ca. 500 mm TL, bottom trawler, 01 June 2010, Diamante, Tyrrhenian Sea (photo S. Petrilli).
FIGURE 6 in Mediterranean fish biodiversity: an updated inventory with focus on the Ligurian and Tyrrhenian seas
FIGURE 6. Percentages of species observed per sampling method (number of exclusive species is indicated inside the bars).
FIGURE 3 in Mediterranean fish biodiversity: an updated inventory with focus on the Ligurian and Tyrrhenian seas
FIGURE 3. Biogeografic composition (%) of the fish fauna for the whole Mediterranean and intra-mediterranean areas studied according to macrobiogeographical categories.
FIGURE 2 in Mediterranean fish biodiversity: an updated inventory with focus on the Ligurian and Tyrrhenian seas
FIGURE 2. Biogeografic composition (%) of the fish fauna for the whole Mediterranean and intra-mediterranean areas studied according to Annexe 1.
FIGURE 8. Seriola fasciata, 250 in Mediterranean fish biodiversity: an updated inventory with focus on the Ligurian and Tyrrhenian seas
FIGURE 8. Seriola fasciata, 250 mm TL, gill net set at 10-15 m depth, 01 January 2012, Vietri sul Mare, Tyrrhenian Sea (photo A. Amato). Zoological Museum of Naples 'Federico II' (Italy) ichthyological collection, voucher no. Z7026
FIGURE 5 in Mediterranean fish biodiversity: an updated inventory with focus on the Ligurian and Tyrrhenian seas
FIGURE 5. Number of Lessepsian and Atlantic immigrant species according to Quignard and Tomasini (2000) and after review (bold).
Data from: Fish functional traits correlated with environmental variables in a temperate biodiversity hotspot
Open the record for dataset details and reuse information.
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.