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475 results for “fish communities”
Figure S5 in Spatiotemporal patterns in marine fish and cephalopods communities across scales: using an autoregressive spatiotemporal clustering model. A study of fish and cephalopods of the Eastern English Channel
Figure S5. – Spatial-temporal hierarchical clustering at a 782 km2 (A) and 1043 km2 (B) scale. The rectangle outlines the communities that where find statistically significant by ASTEC given the approximately unbiased p-values expressed as proportion (red).
Figure 3 in Fish community assemblages in relation to environmental variables in the Lefini River, middle Congo River basin (Republic of Congo)
Figure 3. – RDA ordination of species, stations and the three forward selected environmental variables. A: Biplot of stations and environment variables (1-5: habitats 1-5); B: Biplot of stations and species. ▲: grass bank stations; ●: forest bank stations.
Figure 1 in Fish community assemblages in relation to environmental variables in the Lefini River, middle Congo River basin (Republic of Congo)
Figure 1. – Sampling stations (1-12). Grass bank stations: 1, 4, 5, 6, 10 and 11; Forest bank stations: 2, 3, 7, 8, 9 and 12; LFR: Lefini Faunal Reserve; LLGNR: the Lesio-Louna Gorilla Natural Reserve.
FIGURE 2 in Habitat and community structure modulate fish interactions in a neotropical clearwater river
FIGURE 2 | A. Principal coordinate analysis (PCoA) showing ordination of samples according to substratum composition (i.e., habitat categorization); B. PCoA performed with the abundance of fishes, points sized according to the sum of the abundance in the sample (logarithm scaled for better visualization); C. PCoA performed with the biomass of fishes, points sized according to the sum of the biomass in the sample (logarithm scaled for better visualization). Red lines indicate significative variables (p <0.05) while black lines nonsignificative. Anc spp = Ancistrus spp., Ast lac = Astyanax lacustris, Ast mar = Astyanax marionae, Bry mel = Bryconops melanurus, Cha spp = Characidium spp., Hyp equ = Hyphessobrycon eques, Jup aca = Jupiaba acanthogaster, Lep vit = Leporellus vittatus, Lep fri = Leporinus friderici, Meg mac = Megaleporinus macrocephalus, Odo peq = Odontostilbe pequira, Par nas = Parodon nasus, Phe teg = Phenacogaster tegatus, Pia mes = Piaractus mesopotamicus, Pro lin = Prochilodus lineatus, Sal bra = Salminus brasiliensis.
FIGURE 3 in Habitat and community structure modulate fish interactions in a neotropical clearwater river
FIGURE 3 | Feeding pressure of the 18 fishes that bit the substratum, and their respective trophic groups (colours) at the Olho d´Água River. Black diamonds and lines represent the mean ± standard error, respectively. Habitats in which certain species did not fed on the substratum (zero values) are not represented in the graph. The Y-axis scale is log10 -transformed to better show data dispersion.
FIGURE 1 in Habitat and community structure modulate fish interactions in a neotropical clearwater river
FIGURE 1 | A. Olho d'Água River located in the upper Paraguay River basin, Central Western Brazil. B. Note that clear water allows observation of the underwater vegetation even in aerial photographs. Three sampled habitats are: C. Lake; D. Plant; and E. Rock.
Fig. 2 in Hydropeaking effects of on the diet of a Neotropical fish community
Fig. 2. Results from multivariate analysis nMDS (nonmetric multidimensional scaling) for fish collected in January and July 2010, downstream from Itutinga Dam, Grande River, in the four flow rate treatments (1 - constant flow rate in January; 2 - hydropeaking in January; 3 - constant flow rate in July; 4 - hydropeaking in July).
Fig. 1 in Hydropeaking effects of on the diet of a Neotropical fish community
Fig. 1. Schematic drawing of the Grande River basin upstream from Furnas Reservoir. The study area is highlighted by a black circle.
Fig. 4 in Hydropeaking effects of on the diet of a Neotropical fish community
Fig. 4. Relationship among the diet dissimilarity between seasons and diet dissimilarity stable and hydropeaking treatments in January (a) and July (b). Line is representing a linear correlation. Correlation values (r and p) are indicated. Aa= Apareiodon affinis; Aal= Astyanax altiparanae; Af= Astyanax fasciatus; Bs= Bryconamericus stramineus; Cn= Cyphocharax nagelii; Ev= Eigenmmania virescens; Hy1= Hypostomus sp.1; Hym= Hypostomus aff. margaritifer; Ihe= Iheringichthys labrosus; Km= Knodus moenkhausii; La= Leporinus amblyrhynchus; Lo= Leporinus octofasciatus; Pa= Piabina argentea; Pm= Pimelodus maculatus; Sn= Schizodon nasutus.
Fig. 3 in Hydropeaking effects of on the diet of a Neotropical fish community
Fig. 3. Average frequency of occurrence of food items in the analyzed treatments based on SIMPER analysis, downstream from Itutinga Dam, Grande River. a - Assemblage level; b - Invertivores guild; c - Iliophagous guild; d - Generalists guild; e - Herbivores guild.
Figure 5 in A standardised analytical framework for sampling fish communities: relevance to Turkish riverine ecosystems
Figure 5. Trend profiles in total richness (a–e) and nativeness (f) recorded over six years of TLM monitoring in four habitats at the six Icon Sites in the River Murray system (codes in Table 1). See also Table 5.
Figure 1 in A standardised analytical framework for sampling fish communities: relevance to Turkish riverine ecosystems
Figure 1. Map of the River Murray system in south-eastern Australia with indication of the six Icon Sites part of The Living Murray initiative (see Table 1).
FIGURE 3 in Taxonomic and phylogenetic beta diversity in headwater stream fish communities of the Paraná and Paraguai River basins
FIGURE 3 | Turnover and nestedness components of taxonomic and phylogenetic beta diversity in streams of the Paraná and Paraguai River basins. Clockwise from top left: total, turnover and nestedness components of taxonomic beta diversity; at the bottom, total, turnover and nestedness components of phylogenetic beta diversity. Filled circles correspond to Paraná streams and triangles to Paraguai streams.
FIGURE 2 in Taxonomic and phylogenetic beta diversity in headwater stream fish communities of the Paraná and Paraguai River basins
FIGURE 2 | Phylogenetic hypothesis for fish collected in headwater streams of the Paraná and Paraguai River basins.
FIGURE 1 in Taxonomic and phylogenetic beta diversity in headwater stream fish communities of the Paraná and Paraguai River basins
FIGURE 1 | Headwater streams sampled in the Paraná and Paraguai River basins. Blue circles represent streams of the Paraguai basin, and black triangles represent streams of the Paraná basin. The stars represent waterfalls. The color indicates the variation in altitude.
Fish community composition in the tropical archipelago of São Tomé and Príncipe
<p>Understanding species distribution across habitats and environmental variables is important to inform area-based management. However, observational data are often lacking, particularly from developing countries, hindering effective conservation design. One such data-poor area is the Gulf of Guinea, an understudied and biodiverse region whose waters play a critical role in coastal livelihoods. To fill this gap, we conducted an extensive, national-scale Baited Remote Underwater Video Systems (BRUVS) survey in the coastal waters of the São Tomé and Príncipe archipelago (STP). From 2018 to 2020, we successfully deployed 417 benthic BRUVS, aiming to understand the effects of several environmental variables on fish community composition and diversity. Species richness and relative abundance were higher in deeper waters, on steeper slopes, and in rocky reef habitats. Nevertheless, maerl and sand habitats also hosted unique, and economically important species. Our results potentially indicate historical impacts of fishing in the archipelago, especially in São Tomé Island, where observed fishing effort is higher. Indeed, abundance of large predatory fish was low in both islands and abundance of species targeted by artisanal fisheries was lower in São Tomé than in Príncipe. Our results provide crucial information supporting the designation and future monitoring of marine protected areas in STP.</p>
FIGURE 3 in Invasive poeciliids dominate fish community in a highly altered river: insights from a diversity study of riverbank fishes in Mexico
FIGURE 3 | Canonical Correspondence Analysis (CCA) results showing the relative influence of environmental variable on the community structure of fish species within each site and seasons. Native species are represented by black triangles, while invasive species are denoted by black circles
FIGURE 2 in Invasive poeciliids dominate fish community in a highly altered river: insights from a diversity study of riverbank fishes in Mexico
FIGURE 2 | Rank-abundance curves for each site and each sampled season. Pb: Pseudoxiphophorus bimaculatus; Pr: Poecilia reticulata; Pg: P. gracilis; Pm: P. mexicana; Ga: Goodea atripinnis; Nc: Notropis calientis, Cc: Cyprinus carpio. Native species are highlighted in bold. Due to the high number of individuals in drainage confluence site Log10 was used for comparative purposes.
FIGURE 1 in Invasive poeciliids dominate fish community in a highly altered river: insights from a diversity study of riverbank fishes in Mexico
FIGURE 1 | Map of the sampling sites along the Tula River: 1) Dam spillway, 2) Spring-fed, 3) Drainage confluence.
FIGURE 4 in Fish community turnover in a dammed Andean River over time
FIGURE 4 | Observed fish-species richness vs. environments. Violin plot comparing the median, interquartile range, and 95% confidence interval on the distribution pattern of richness among environments (left: native fish, right: non-native fish). The shape of the violin plot represents data distribution by kernel-density estimation, meaning that wider sections represent a higher probability of that given value of richness in that environment; the skinnier sections represent a lower probability. P-values from Kruskal–Wallis test for richness among environment is displayed. The environments were identified from upstream to downstream direction, as follows: (RPM) Porce River isolated between the dams, (RG) Guadalupe River, (RSV) Reservoir, (CFR) Creeks flowing to the reservoir, (CFD) Creeks flowing to the Porce River below the dam and (RPD) Porce River below the Porce III dam.
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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
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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.