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300 results for “ichthyofauna”
FIGURE 4 in Structure and composition of ichthyofauna associated with cage fish farming and compared to a control area after severe drought in a Neotropical reservoir
FIGURE 4 | Beta diversity (PERMDISP) in the drought and wet seasons in the control and fish farm areas at the Ilha Solteira reservoir, Upper Paraná River, São Paulo, Brazil. Average distances of centroids with presence/absence of data. Asterisks indicates significant upper value between seasons within each area.
FIGURE 3 in Structure and composition of ichthyofauna associated with cage fish farming and compared to a control area after severe drought in a Neotropical reservoir
FIGURE 3 | Box plots (minimum and maximum value = vertical line ends, standard error = box, and mean = horizontal line) of the ichthyofauna attributes in the control area and fish farm area, in the drought and wet seasons at the Ilha Solteira reservoir, Upper Paraná River, SP, Brazil. A. Total abundance; B. Species richness; C. Shannon index; D. Pielou evenness. Asterisks indicates significant upper value between seasons within each area. Hash indicates significant upper value between areas within each season.
FIGURE 2 in Structure and composition of ichthyofauna associated with cage fish farming and compared to a control area after severe drought in a Neotropical reservoir
FIGURE 2 | Historical series of the variation in quota (m) between 1999 and 2019 in the Ilha Solteira reservoir, Upper Paraná River, São Paulo, Brazil. The dots indicate the sampling period.
FIGURE 1 in Structure and composition of ichthyofauna associated with cage fish farming and compared to a control area after severe drought in a Neotropical reservoir
FIGURE 1 | Map of South America showing the Ilha Solteira reservoir, with an indication of the sample areas (black circles). Adapted from Kliemann et al. (2018).
FIGURE 3 in Ichthyofauna on the move: fish colonization and spread through the São Francisco Interbasin Water Transfer Project
FIGURE 3 | Canonical analysis of principal coordinates (CAP) for the species and sites that contributed to the differences between basins and reservoirs (SF = São Francisco River basin, PB = Paraíba do Norte River basin, EAR = East Axis Reservoirs). Fitted site scores are colored and shaped according to the basin or EAR designation. A subset of species that explain at least 70% of the variation among sites is represented by species name abbreviation (two first letters of genus and the two first of the epithet). The only predictor significant for the linear model was richness.
FIGURE 2 in Ichthyofauna on the move: fish colonization and spread through the São Francisco Interbasin Water Transfer Project
FIGURE 2 | Seriated ordination of the species presence/ absence at the sampling sites of the East Axis of the São Francisco River Integration Project (SF-IWT). Black cells represent the presence of the species at a particular location. The species written in bold represents the new occurrence record in the receiving basin. In the upper right corner, Venn diagram showing species richness interactions between groups of sites. SF = São Francisco River basin, PB = Paraíba do Norte River basin, EAR = East Axis Reservoirs.
FIGURE 5 in Ichthyofauna on the move: fish colonization and spread through the São Francisco Interbasin Water Transfer Project
FIGURE 5 | Spatial distribution of Anchoviella vaillanti. The size of the circles represents juveniles/adults' abundance at each sampling site. The species went from the Sao Francisco donor basin through the SF-IWT East Axis artificial canals and reservoirs, reaching the receiving Paraíba do Norte basin sites, in the states of Pernambuco (PE) and Paraíba (PB), Brazil. DB = Donor basin, EAR = East Axis Reservoirs, RB = Receiving basin. Detailed location list of the sampling sites in Tab. S1.
FIGURE 1 in Ichthyofauna on the move: fish colonization and spread through the São Francisco Interbasin Water Transfer Project
FIGURE 1 | Schematic representation containing the monitored sites along the East Axis of the São Francisco River Integration Project (SFIWT) and the exact location of the new records of Anchoviella vaillanti in the Poções and Epitácio Pessoa Reservoirs. DB = Donor basin, EAR = East Axis Reservoirs, RB = Receiving basin. Detailed location list of the sampling sites in Tab. S1.
FIGURE 4 in Ichthyofauna on the move: fish colonization and spread through the São Francisco Interbasin Water Transfer Project
FIGURE 4 | Variation in the abundance of non-native species Anchoviella vaillanti and Moenkhausia costae in the Poções Reservoir (RB 1) in the campaigns conducted after the arrival of the SF-IWT waters.
Figure 9 in Study of the ichthyofauna diet in the Ichkeul Lake (Tunisia)
Figure 9. - Structural diagram of the Ichkeul Lake trophic web and trophic relationships (prey-predator) between ichthyofauna and their main prey (thick line = high predation; single line = ordinary to low predation; Dashed lines: larvae + juvenile of fishes (Predation fish to fish), thick dashed line = hight predation, thin dased line = ordinary to low predation).
Figure 8 in Study of the ichthyofauna diet in the Ichkeul Lake (Tunisia)
Figure 8. - Correspondence Analysis (CA) between fish species and food diets during the dry season. The additive symbol attributed for each species referred to sectors; [E] for Eastern sector and [W] for Western sector.
Figure 7 in Study of the ichthyofauna diet in the Ichkeul Lake (Tunisia)
Figure 7. - Correspondence Analysis (CA) between fish species and food diets during the wet season. The additive symbol attributed for each species referred to sectors; [E] for Eastern sector and [W] for Western sector.
Figure 6 in Study of the ichthyofauna diet in the Ichkeul Lake (Tunisia)
Figure 6. - Spatio-temporal evolution of volumetric percentages (%V) of the different prey categories found in the stomach contents. A: Liza aurata; B: Liza ramada; C: Liza saliens; D: Mugil cephalus; E: Pomatoschistus microps; F: Syngnathus abaster; G: Syngnathus acus; H: Syngnathus typhle, in the Ichkeul Lake. ED: East sector-Dry season; EW: East sector-Wet season; WD: West sector-Dry season; WW: West sector-Wet season; n = N: number of non-empty analyzed stomachs for each species.
Figure 1 in Study of the ichthyofauna diet in the Ichkeul Lake (Tunisia)
Figure 1. - Geographic location of Ichkeul Lake: its water network and its communication with Bizerta lagoon.
Figure 4 in Study of the ichthyofauna diet in the Ichkeul Lake (Tunisia)
Figure 4. - Hierarchical Cluster Analysis (HCA) of fish species according to their diet. The threshold value of HornMorisita distance adopted to extract groups was 0.6. See figure 3 for species names.
Figure 5 in Study of the ichthyofauna diet in the Ichkeul Lake (Tunisia)
Figure 5. - Spatiotemporal evolution of volumetric percentages (%V) of the different prey categories found in the stomach contents. A: Anguilla anguilla; B: Aphanius fasciatus; C: Atherina boyeri; D: Barbus callensis; E: Belone belone; F: Dicentrarchus labrax; G: Engraulis encrasicolus; H: Solea senegalensis, in the Ichkeul Lake. ED: East sector-Dry season; EW: East sector-Wet season; WD: West sector-Dry season; WW: West sector-Wet season; n = N: number of non-empty analyzed stomachs for each species.
Figure 3 in Study of the ichthyofauna diet in the Ichkeul Lake (Tunisia)
Figure 3. - General annual evolution in the volumetric percentages (%V) of the prey categories found in the stomach contents of Ichkeul fish species (the number of non-empty stomachs analyzed for each species is indicated above each species. Ana: Anguilla anguilla, Apf: Aphanius fasciatus, Atb: Atherina boyeri, Bac: Barbus callensis, Beb: Belone belone, Dil: Dicentrarchus labrax, Ene: Engraulis encrasicolus, Lia: Liza aurata, Lir: Liza ramada, Lis: Liza saliens, Muc: Mugil cephalus, Pom: Pomatochistus microps, Syab: Syngnathus abaster, Syac: Syngnathus acus, Syty: Syngnathus typhle and Sos: Solea senegalensis.
Figure 2 in Study of the ichthyofauna diet in the Ichkeul Lake (Tunisia)
Figure 2. - Evolution of the average temperature (°C) (A) and salinity (B) in both East and West sectors of Ichkeul Lake during the sampling period.
Fig. 2 in Food spectrum and trophic structure of the ichthyofauna of Corumbá reservoir, Paraná river Basin, Brazil
Fig. 2. Food resource availability, inferred from the volume of food items in the stomachs analyzed for all species combined.
Text-fig. 1. Lithostratigraphic scheme for Most Basin (edited according to Kvaček et al. 2019 and Hilgen et al. 2012) with fossiliferous horizons of Holešice and Libkovice members in its west part. Stratigraphic position of fish remnants is highlighted. in New Ichthyofauna From The Holešice And Libkovice Members In The Western Part Of Most Basin (Early Miocene), The Czech Republic
Text-fig. 1. Lithostratigraphic scheme for Most Basin (edited according to Kvaček et al. 2019 and Hilgen et al. 2012) with fossiliferous horizons of Holešice and Libkovice members in its west part. Stratigraphic position of fish remnants is highlighted.
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