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201 results for “fish conservation”
FIGURE 4 in Fishes of the upper rio Paraná basin: diversity, biogeography and conservation
FIGURE 4 | Diversity of native fish species present in the upper rio Paraná by orders. The value in parentheses corresponds to the number of species in each order.
FIGURE 2 in Fishes of the upper rio Paraná basin: diversity, biogeography and conservation
FIGURE 2 | Topographic map of the upper rio Paraná. In the upper right corner, the location of the basin (highlighted in orange) in Brazil and in the South American continent.
FIGURE 1 in Fishes of the upper rio Paraná basin: diversity, biogeography and conservation
FIGURE 1 | The upper rio Paraná and its main tributaries. The basin is defined as the entire area drained upstream of the former Sete Quedas Falls. Note that the Itaipu dam is located downstream from Sete Quedas. Numbers indicate capital cities in the basin: 1. São Paulo; 2. Brasília; 3. Goiânia; 4. Campo Grande.
FIGURE 3 in Fishes of the upper rio Paraná basin: diversity, biogeography and conservation
FIGURE 3 | Sampling records of fishes in the upper Paraná basin compiled in this study. Most points are concentrated on the left bank, mainly in the regions corresponding to the rios Tietê, Grande, and Paranapanema, where there are concentrations of urban centers and/or research institutions.
FIGURE 8 in Rocky reef fish biodiversity and conservation in a Brazilian Hope Spot region
FIGURE 8 | Heniochus acuminatus. A. The SRV frame recorded on MAR 2019 at Redonda Island, inside of the MPA, close to Acanthurus bahianus; B. H. acuminatus photographed in April 2022 (photo by Augusto A. Machado).
FIGURE 4 in Rocky reef fish biodiversity and conservation in a Brazilian Hope Spot region
FIGURE 4 | Elasmobranchs commonly observed on Rio de Janeiro coastal islands rockyreefs: A. Gymnura altavela, B. Myliobatis freminvillei, and C. Zapteryx brevirostris; new records D. Sarda sarda and E. Chromis vanbebberae; and the most common species: F. Diplodus argenteus, G. Cantherhines pullus, and H. Haemulon aurolineatum. Photos: Augusto A. Machado (A–B), Suzana Guimarães (D), Áthila A. Bertoncini (C, E–H).
FIGURE 3 in Rocky reef fish biodiversity and conservation in a Brazilian Hope Spot region
FIGURE 3 | The richest families reported along the coastal islands and surrounding waters of Rio de Janeiro metropolitan region, Brazil.
FIGURE 2 in Rocky reef fish biodiversity and conservation in a Brazilian Hope Spot region
FIGURE 2 | Submersible Rotating Videos "SRV" in operation on Redonda Island. Photo: Áthila A. Bertoncini.
FIGURE 10 in Rocky reef fish biodiversity and conservation in a Brazilian Hope Spot region
FIGURE 10 | Venn diagram representing exclusive and shared species richness recorded in the study areas: large-bold-grey numbers are the total number of species in each area; small numbers represent exclusive species in each area; medium size numbers represent the share between/among areas.
FIGURE 1 in Rocky reef fish biodiversity and conservation in a Brazilian Hope Spot region
FIGURE 1 | Maps and photographs of the study area (Coastal Islands of Rio de Janeiro metropolitan region). A. The State of Rio de Janeiro in Southeast Brazil; B. The Guanabara Bay and the archipelagos/islands along the southern coast, Z13 fishermen's colony (red square) and Z7 fishermen's colony (red circle); C. Tijucas Archipelago; D. Cagarras Archipelago and Redonda Island and Filhote da Redonda Islet forming the MONA Cagarras MPA; E. Cotunduba Island; F. Rasa Island; G. Maricás Archipelago; H. Aerial view from West of the Tijucas Archipelago; I. Aerial view from Northwest of MONA Cagarras, depicting Rasa Island in the far background; J. Aerial view from Southeast of Cotunduba Island; K. Aerial view from East of the Maricás Archipelago. Credits: Augusto A. Machado (A-G); Áthila A. Bertoncini (H, I, K); Fred Cunha (J).
FIGURE 9 in Rocky reef fish biodiversity and conservation in a Brazilian Hope Spot region
FIGURE 9 | Doughnut chart showing the assigned categories (%) of threatened fish species according to the IUCN and the Brazilian (ICMBio, 2018) red lists. CR = Critically Endangered, DD = Data Deficient, EN = Endangered, LC = Least Concern, NE = Not Evaluated, NT = Near Threatened, VU = Vulnerable.
FIGURE 6 in Rocky reef fish biodiversity and conservation in a Brazilian Hope Spot region
FIGURE 6 | Rare fish species recorded on Rio de Janeiro coastal islands rockyreefs: A. Hippocampus reidi, B. Callionymus bairdi, C. Haemulon plumierii, D. Sargocentron bullisi, E. Chromis flavicauda, F. Pronotogrammus martinicensis, G. Centropyge aurantonotus, and H. Bodianus rufus. Photos: Áthila A. Bertoncini.
FIGURE 5 in Rocky reef fish biodiversity and conservation in a Brazilian Hope Spot region
FIGURE 5 | Rare fish species recorded on Rio de Janeiro coastal islands rocky reefs: A. Thalassoma noronhanum, B. Paranthias furcifer, C. Xyrichtys splendens, D. Clepticus brasiliensis, E. Eques lanceolatus, F. Uraspis secunda, G. Scarus zelindae and H. Ptereleotris randalli. Photos: Áthila A. Bertoncini (A–B, E–H), Augusto A. Machado (C, D).
FIGURE 7 in Rocky reef fish biodiversity and conservation in a Brazilian Hope Spot region
FIGURE 7 | Two cryptic species observed at a particular gravel bottom at Tijucas Archipelago. A. Gobulus myersi (new record) and Paraclinus spectator. Photos: Áthila A. Bertoncini.
Genotype and genetic diversity data for: Contrasts in riverscape patterns of intraspecific genetic variation in a diverse Neotropical fish community of high conservation value
<p><span>Spatial patterns in genetic variation compared across species provide information about the predictability of genetic diversity of natural populations and areas requiring conservation measures. Due to their remarkable fish diversity, rivers in Neotropical regions are ideal systems to confront theory with observations and would benefit greatly from such approaches given their increasing vulnerability to anthropogenic pressures. We used SNP data from 18 fish species with contrasting life-history traits, co-sampled across 12 sites in the Maroni – a major river system from the Guiana Shield – to compare patterns of intraspecific genetic variation and identify their underlying drivers. Analyses of covariance revealed a decrease in genetic diversity as distance from the river outlet increased for 5 of the 18 species, illustrating a pattern commonly observed in riverscapes for species with low-to-medium dispersal abilities. However, mean within-site genetic diversity was lowest in the two easternmost tributaries of the Upper Maroni and around an urbanized location downstream, indicating the need to address the potential influence of local pressures in these areas, such as goldmining or fishing. Finally, the relative influence of isolation by stream distance, isolation by discontinuous river flow and isolation by spatial heterogeneity in effective size on pairwise genetic differentiation varied across species. Species with similar dispersal and reproductive guilds did not necessarily display shared patterns of population structure. Increasing the knowledge of specific life history traits and ecological requirements of fish species in these remote areas should help further understand factors that influence their current patterns of genetic variation.</span></p>
Figure 5 in A review of amphidromous freshwater fishes of the Chocó biogeographical region (Colombia and Ecuador): diversity, ecology, fisheries and conservation
Figure 5. – Representative habitat of freshwater amphidromous fishes in western of Colombia. A: photo of Valle River, 20 m collection site; B: Photo of Aguaclara River (Anchicayá Basin), 70 m collection site; C: Representative habitat in which post-larval Awaous transandeanus, Hemieleotris latifasciata, Hemieleotris levis and Sicydium spp. were collected in western Colombia. Photo of San Juan River, 18 m collection site; D: Type locality of Sicydium hildebrandi, photo of Dagua River in Cisneros, 350 m collection site.
Genotype and genetic diversity data for: Contrasts in riverscape patterns of intraspecific genetic variation in a diverse Neotropical fish community of high conservation value
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Data from: Extending full protection inside existing marine protected areas or reducing fishing effort outside can reconcile conservation and fisheries goals
<p>1. Most fish stocks worldwide are fished at maximum sustainable yield (MSY) or overfished, as many fisheries management strategies have failed to achieve sustainable fishing. Identifying effective fisheries management strategies has now become urgent.</p> <p>2. Here, we developed a spatially-explicit metapopulation model accounting for population connectivity in the north-western Mediterranean Sea, and parameterized it for three ecologically and economically important coastal fish species: the white seabream <i>Diplodus sargus</i>, the two-banded seabream <i>Diplodus vulgaris</i> and the dusky grouper <i>Epinephelus marginatus</i>.</p> <p>3. We used the model to assess how stock biomass and catches respond to changes in fishing mortality rate (<i>F</i>) and in the size of fully protected areas within the existing system of multiple-use marine protected areas (MPAs). For each species, we estimated MSY and the corresponding values of stock biomass (<i>B</i><sub>MSY</sub>) and fishing mortality rate (<i>F</i><sub>MSY</sub>), providing crucial reference points for the assessment of fisheries management.</p> <p>4. <i>D. sargus</i> is currently in low overfishing, while <i>D. vulgaris</i> and <i>E. marginatus</i> are in high overfishing. Stock recovery to <i>B</i><sub>MSY</sub> for the last two species requires a reduction of current <i>F</i> around 50%. This would guarantee an increase in both stock biomass (around 50 and 75% for <i>D. vulgaris</i> and <i>E. marginatus</i>, respectively) and catch (around 15 and 30%) after a transient time of ~15–30 years. Alternatively, doubling the size of fully protected areas over fishable areas within the existing network of MPAs would lead to positive conservation effects for all three species without substantially affecting the overall productivity of the fishery and the total economic value of the catch.</p> <p>5. <i>Synthesis and applications.</i> We provide the first assessment of stock status for three coastal species in the north-western Mediterranean and evaluate the ecological and fisheries outcomes of different management strategies. Extending full protection inside existing multiple-use marine protected areas or reducing fishing effort outside can deliver both conservation and fisheries benefits.</p>
Data from: Discovery and characterization of single nucleotide polymorphisms in two anadromous alosine fishes of conservation concern
Freshwater habitat alteration and marine fisheries can affect anadromous fish species, and populations fluctuating in size elicit conservation concern and coordinated management. We describe the development and characterization of two sets of 96 single nucleotide polymorphism (SNP) assays for two species of anadromous alosine fishes, alewife and blueback herring (collectively known as river herring), that are native to the Atlantic coast of North America. We used data from high-throughput DNA sequencing to discover SNPs and then developed molecular genetic assays for genotyping sets of 96 individual loci in each species. The two sets of assays were validated with multiple populations that encompass both the geographic range and the known regional genetic stocks of both species. The SNP panels developed herein accurately resolved the genetic stock structure for alewife and blueback herring that was previously identified using microsatellites and assigned individuals to regional stock of origin with high accuracy. These genetic markers, which generate data that are easily shared and combined, will greatly facilitate ongoing conservation and management of river herring including genetic assignment of marine caught individuals to stock of origin.
Data from: Multispecies conservation of freshwater fish assemblages in response to climate change in the southeastern United States
Aim: Streamflow and water temperature are primary variables influencing the distribution of freshwater taxa. Climate-induced changes in these variables are already causing shifts in species distributions, with continued changes projected in the coming decades. The Mobile River Basin (MRB), located in the southeastern United States, contains some of the highest levels of temperate freshwater biodiversity in North America. We integrated species distribution data with contemporary and future streamflow and water temperature data as well as other physical habitat data to characterize occurrence probabilities of fish species in the MRB with the goal of identifying current and future areas of high conservation value. Location: Mobile River Basin, southeastern United States Methods: We used a maximum entropy approach to estimate baseline and future occurrence probability distributions for 88 fish species in the MRB based on model-generated streamflow and water temperature as well as geologic, topographic, and land cover data. Areas of conservation prioritization were identified based on regions that contain suitable habitat for high levels of biodiversity according to baseline and future conditions while accounting for uncertainty associated with multiple future climate projections. Results: On average, flow (28%), water temperature (28%), and geology (30%) contribute evenly to determining suitable habitat for fish species in the MRB. Based on baseline and future species distribution model estimates, high priority streams (best 10%) are largely concentrated in the eastern portion of the MRB, with a majority (51%) located within the Coosa and Tallapoosa River systems. Main Conclusion: We provide a framework that uses relevant hydrologic and environmental data in the context of future climatic uncertainty to estimate areas of freshwater conservation opportunity in the coming decades. While streamflow and water temperature represent important habitat for freshwater fishes in the MRB, distributions are also constrained by other aspects of the physical environment.
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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.