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435 results for “Stream fish”
Figure 3 from: Lazzarini Wolff L, Segatti Hahn N (2017) Fish habitat associations along a longitudinal gradient in a preserved coastal Atlantic stream, Brazil. Zoologia 34: 1-13. https://doi.org/10.3897/zoologia.34.12975
Figure 3 Scatter plot of sampling sites and mesohabitats in the Vermelho River, Paraná state, Brazil, along the environmental gradient produced by the first two PCA axes (PC1 and PC2). Inner figure shows Pearson correlations of variables with PC1.
Figure 2 from: Lazzarini Wolff L, Segatti Hahn N (2017) Fish habitat associations along a longitudinal gradient in a preserved coastal Atlantic stream, Brazil. Zoologia 34: 1-13. https://doi.org/10.3897/zoologia.34.12975
Figure 2 Fish sampling procedure. Length (above) and average depth (below) of each blocked (with seines) sampling site are showed. Middle sites were clustered into mesohabitats (see text). Displacement of fishing indicates the upstream direction of passage of electrofishing dip nets with electrodes.
Figure 5 from: Lazzarini Wolff L, Segatti Hahn N (2017) Fish habitat associations along a longitudinal gradient in a preserved coastal Atlantic stream, Brazil. Zoologia 34: 1-13. https://doi.org/10.3897/zoologia.34.12975
Figure 5 Ordination of the sampling sites through a detrended correspondence analysis (DCA) applied to the density matrix of fish species in the Vermelho River, Paraná state, Brazil.
Figure 6 from: Lazzarini Wolff L, Segatti Hahn N (2017) Fish habitat associations along a longitudinal gradient in a preserved coastal Atlantic stream, Brazil. Zoologia 34: 1-13. https://doi.org/10.3897/zoologia.34.12975
Figure 6 Ordination of sampling mesohabitats in the middle reach through a detrended correspondence analysis (DCA) applied to density matrix of fish species in the Vermelho River, Paraná state, Brazil.
Figure 1 from: Lazzarini Wolff L, Segatti Hahn N (2017) Fish habitat associations along a longitudinal gradient in a preserved coastal Atlantic stream, Brazil. Zoologia 34: 1-13. https://doi.org/10.3897/zoologia.34.12975
Figure 1 Location of the Vermelho River, eastern Atlantic basin, Antonina, Paraná state, Brazil. Black circles indicate the sampling reaches; arrow indicates the flow direction. Source: PEREIRA Jaime Luiz Lopes, 2015.
FIGURE 5 in When roads cross streams: fish assemblage responses to fluvial fragmentation in lowland Amazonian streams
FIGURE 5 | ANOVA results for assemblage structure in northeastern Amazonian streams among stream reach groups. A. Taxonomic structure; B. Functional structure. D: Downstream reaches from impoundments; I: Impounded reaches; U: Upstream reaches from impoundments.
FIGURE 4 in When roads cross streams: fish assemblage responses to fluvial fragmentation in lowland Amazonian streams
FIGURE 4 | Relative contribution of turnover and nestedness component to total beta diversity obtained after averaging pairwise dissimilarities (Sørensen index) between stream reaches at each stream. D: Downstream reaches from impoundments; I: Impounded reaches; U: Upstream reaches from impoundments.
FIGURE 2 in Physical habitat as predictor of fish trophic structure in Brazilian Atlantic rainforest streams
FIGURE 2 | Proportion of fish species richness, biomass, and number of individuals in each trophic group for each sampling point in the Paranapanema river basin, São Paulo state, Brazil.
FIGURE 2 in Fish biomarker responses to perturbation by drought in streams
FIGURE 2 | MDA and enzymatic activity in the gills of Astyanax elachylepis from intermittent and perennial streams during dry and rainy seasons. Different capital letters indicate a significant difference (Tukey post-hoc test at p <0.05) between seasons for a given stream, and different lower-case letters indicate a significant difference between intermittent and perennial streams within a given season. Differences are shown only between levels of the factors that had significant effect according to two-way ANOVA.
FIGURE 4 in Physical habitat as predictor of fish trophic structure in Brazilian Atlantic rainforest streams
FIGURE 4 | Biplot of the first two canonical functions showing how substrate composition (SC), mesohabitat variability (MH), and bank stability (BS) correlate with number of individuals of carnivores (NCar), invertivores (NInv), omnivores (NOmn), and herbivorous-detritivores (NHD).
FIGURE 3 in Short-term response of fish assemblages to instream habitat restoration in heavily impacted streams
FIGURE 3 | Physical changes in stream reaches: A. Picture of the buried structure in P2; B. P3 stream reach at the beginning of the experiment; C. P3 stream reach at the end of the experiment, illustrating organic matter retention by the woody structure; D. macrophytes retention by wire in P8; E. growth of periphyton on the wood; F. growth of algae on the wood.
FIGURE 2 in Short-term response of fish assemblages to instream habitat restoration in heavily impacted streams
FIGURE 2 | Details of the structure used in the experiment. A. top view; B. side view; C. representation of the placement of the leaf-packs; D. cross section of the stream channel showing details of how the structure was placed in the stream; E. top view of the structure showing the points where the iron rods were installed.
Fig. 3 in Disentangling the influences of habitat structure and limnological predictors on stream fish communities of a coastal basin, southeastern Brazil
Fig. 3. Results of partial Redundant Analyses (pRDA) showing the patterns of correlation among species abundance with the pure limnological (a), and pure structural (b) predictors. The asterisks indicate environmental variables which were statistically correlated (p ≤ 0.05) with community composition. Only species with eigenvectors higher than 0.2 were identified by their abbreviated symbols. The others were identified by black dots. This limit was arbitrary but chosen to evidence only the species which were mostly correlated with environmental predictors.
Fig. 2 in Disentangling the influences of habitat structure and limnological predictors on stream fish communities of a coastal basin, southeastern Brazil
Fig. 2. Results of the Principal Component Analysis (PCA) showing the clearwater (open circles) and blackwater (black circles) sites.
Fig. 1 in Disentangling the influences of habitat structure and limnological predictors on stream fish communities of a coastal basin, southeastern Brazil
Fig. 1. Hydrography and location of the sampling sites (first to third-order streams) in the coastal plain of Itanhaém River basin, southeastern Brazil. Open circles: clearwater streams. Black circles: blackwater streams.
Figure 2 from: Ávila MP, Carvalho RN, Casatti L, Simião-Ferreira J, de Morais LF, Teresa FB (2018) Metrics derived from fish assemblages as indicators of environmental degradation in Cerrado streams. Zoologia 35: 1-8. https://doi.org/10.3897/zoologia.35.e12895
Figure 2 Stream sites grouped by their environmental characteristics by using UPGMA (Unweighted Pair Group Method with Arithmetic Mean). Height at y-axis refers to Euclidean distance.
Figure 3 from: Ávila MP, Carvalho RN, Casatti L, Simião-Ferreira J, de Morais LF, Teresa FB (2018) Metrics derived from fish assemblages as indicators of environmental degradation in Cerrado streams. Zoologia 35: 1-8. https://doi.org/10.3897/zoologia.35.e12895
Figure 3 Box-and-Whisker plots of the three sensitive metrics. Rectangles represent the 1st and 3rd quartiles, small squares are medians, bars are maximum and minimum values. Different letters indicate statistically significant differences.
Figure 1 from: Ávila MP, Carvalho RN, Casatti L, Simião-Ferreira J, de Morais LF, Teresa FB (2018) Metrics derived from fish assemblages as indicators of environmental degradation in Cerrado streams. Zoologia 35: 1-8. https://doi.org/10.3897/zoologia.35.e12895
Figure 1 Map of South America highlighting the Goiás State (Brazil) and the sampling sites located in the Santa Tereza sub-basin, Upper Tocantins River basin.
Supplementary material 2 from: Li Y, Evans NT, Renshaw MA, Jerde CL, Olds BP, Shogren AJ, Deiner K, Lodge DM, Lamberti GA, Pfrender ME (2018) Estimating fish alpha- and beta-diversity along a small stream with environmental DNA metabarcoding. Metabarcoding and Metagenomics 2: e24262. https://doi.org/10.3897/mbmg.2.24262
GPS and environmental variables of each site. :
Supplementary material 1 from: Li Y, Evans NT, Renshaw MA, Jerde CL, Olds BP, Shogren AJ, Deiner K, Lodge DM, Lamberti GA, Pfrender ME (2018) Estimating fish alpha- and beta-diversity along a small stream with environmental DNA metabarcoding. Metabarcoding and Metagenomics 2: e24262. https://doi.org/10.3897/mbmg.2.24262
Control samples that were used to test for contamination during each step of the experiment. :
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
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