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300 results for “ichthyofauna”
Figs 5-7 in Can dams affect the trophic structure of ichthyofauna? A long-term effects in the Neotropical region
Figs 5-7. Trophic interactions networks built with fish species (black) and resources consumed (gray): Fig. 5, Stretch 1 (lotic); Fig. 6, Stretch 2 (transition) and Fig. 7, Stretch 3 (lentic) in Jurumirim Reservoir, Upper Paranapanema River, state of São Paulo, Brazil.
Fig. 1 in Can dams affect the trophic structure of ichthyofauna? A long-term effects in the Neotropical region
Fig. 1. Map of Jurumirim Reservoir (Upper Paranapanema River, state of São Paulo, Brazil) indicating the three samplings zones.
Fig. 2 in Structure of the ichthyofauna of adventitious streams in the South Pantanal
Fig. 2. Results of the ordination (NMDS) analysis applied to fish species (abundance data) sampled in five streams of the Taquari River basin, during the wet (W) and dry (D) season (two replicates per season).All species were used in the analysis but only species with more than 5% of total abundance were plotted in the graphic (Streams: O, Óleo; C, Cabeceira Comprida; F, Firmino; T, Toni; A, Aldeia. Species: Aasu, Astyanax asuncionensis; Bexo, Bryconamericus exodon; Czeb, Characidium cf. zebra; Hher, Hyphessobrycon herbertaxelrodi; Ieic, Ituglanis eichorniarum; Rque, Rhamdia quelen).
Fig. 3 in Structure of the ichthyofauna of adventitious streams in the South Pantanal
Fig. 3. Species dominance curves of the five streams of the Taquari River basin, constructed with the fish species abundance data on the dry (D) and wet season (W) (Streams: O, Óleo; C, Cabeceira Comprida; F, Firmino; T, Toni; A, Aldeia).
Fig. 1 in Structure of the ichthyofauna of adventitious streams in the South Pantanal
Fig. 1. Location of Mato Grosso do Sul state in Brazil (MS), the state being delimited by the Paraguay River to the west, with the studied area in the Taquari River indicated by a rectangle (map above) and amplified to indicate the location of the studied streams (map below) (Streams: 1, Óleo; 2, Cabeceira Comprida; 3, Firmino; 4, Toni; 5, Aldeia).
FIGURE 3 in Mesophotic ecosystems at Fernando de Noronha Archipelago, Brazil (South-western Atlantic), reveal unique ichthyofauna and need for conservation
FIGURE 3 | Lower mesophotic (below 90 m depth) ecosystems explored through technical rebreather diving around the Fernando de Noronha Archipelago. A. The insular shelf edge; and B. The steep wall.
FIGURE 7 in Mesophotic ecosystems at Fernando de Noronha Archipelago, Brazil (South-western Atlantic), reveal unique ichthyofauna and need for conservation
FIGURE 7 | Evidence of human impacts (arrows) by fishing debris, plastics and other trash found in the ecosystems explored around the Fernando de Noronha Archipelago. A. and B. Mesophotic (> 30 m deep); C. Intertidal; and D. Shallow ecosystems (≤ 30 m deep). Photos A and B by L. A. Rocha and photos C and D by J. L. Gasparini.
FIGURE 1 in Mesophotic ecosystems at Fernando de Noronha Archipelago, Brazil (South-western Atlantic), reveal unique ichthyofauna and need for conservation
FIGURE 1 | Location of the Fernando de Noronha Archipelago, Brazil (South-western Atlantic). Blue line indicates the area of the Marine National Park of Fernando de Noronha (no-take MPA). Dashed lines indicate the 30, 60, 90 and 150 m isobaths. Black triangles, red stars, golden squares and green dots indicate the position of stereo-BRUVS deployments, rebreather dives, SCUBA dives and ROV footages, respectively.
FIGURE 5 in Mesophotic ecosystems at Fernando de Noronha Archipelago, Brazil (South-western Atlantic), reveal unique ichthyofauna and need for conservation
FIGURE 5 | New records of fishes from the mesophotic ecosystems collected and photographed in aquarium. A. Aulotrachichthys argyrophanus (~ 6.5 cm total length; CIUFES 3909); B. Corniger spinosus (~ 15 cm total length; CIUFES 3922); C. Decodon puellaris (~ 7.5 cm total length; CIUFES 3914); and D. Pronotogrammus martinicensis (~ 20 cm total length; CIUFES 3939 / 3960). Photos by J. L. Gasparini.
FIGURE 4 in Mesophotic ecosystems at Fernando de Noronha Archipelago, Brazil (South-western Atlantic), reveal unique ichthyofauna and need for conservation
FIGURE 4 | New records of fishes at the mesophotic ecosystems. A. Chromis enchrysura (~ 10 cm total length); B. Balistes capriscus (~ 30 cm total length); C. Chromis scotti (~ 7.5 cm total length); D. Prognathodes guyanensis (~ 15 cm total length); E. Synodus sp. (~ 15 cm total length); F. Scorpaena sp. (~ 7.5 cm total length); G. Psilotris sp. (~ 5 cm total length); and H. Cosmocampus profundus (white arrow; ~ 15 cm total; I. Lutjanus buccanella (~ 50 cm total length). Photos by L. A. Rocha (A, C-G) and stereo-BRUVS (B, H and I). Tosanoides sp. is under description and its picture is not shown.
FIGURE 2 in Mesophotic ecosystems at Fernando de Noronha Archipelago, Brazil (South-western Atlantic), reveal unique ichthyofauna and need for conservation
FIGURE 2 | Middle mesophotic (61 to 90 m depth) mosaic of habitats sampled with stereo-BRUVS around the Fernando de Noronha Archipelago. A. Patch reefs; B. Sand bottoms; and C. Rhodoliths beds.
FIGURE 4 in Building a baseline: a survey of the composition and distribution of the ichthyofauna of Guanabara Bay, a deeply impacted estuary
FIGURE 4 | Distribution of absolute richness (A) and species density (B) per km2 at Guanabara Bay, Rio de Janeiro, Brazil.
FIGURE 3 in Building a baseline: a survey of the composition and distribution of the ichthyofauna of Guanabara Bay, a deeply impacted estuary
FIGURE 3 | Ichthyofauna rates found for Guanabara Bay, Rio de Janeiro, Brazil. A. As a whole and for the B. Lower, C. Middle, and D. Upper estuaries separately, where "mg" corresponds to the number of extra samples needed to reach a "g" for estimated richness. When the line touches the x axis (mg = 0), the "g" values are reached by our study, that is, the value in which extra collections are not necessary.
FIGURE 2 in Building a baseline: a survey of the composition and distribution of the ichthyofauna of Guanabara Bay, a deeply impacted estuary
FIGURE 2 | Rarefaction curves for Guanabara Bay's ichthyofauna richness, Rio de Janeiro, Brazil. A. For the bay as a whole, and for the estuary compartments separately: B. Lower estuary, C. Middle estuary and D. Upper estuary.
FIGURE 1 in Building a baseline: a survey of the composition and distribution of the ichthyofauna of Guanabara Bay, a deeply impacted estuary
FIGURE 1 | Guanabara Bay map, Rio de Janeiro, divided into five km x five km quadrants. Different shades of blue indicate which estuary compartment (upper, middle or lower) the quadrant belongs to.
FIGURE 4 in Taxonomic loss and functional reduction over time in the ichthyofauna of the Taquaruçu Reservoir, lower Paranapanema River, Southern Brazil
FIGURE 4 | Two-dimensional functional space (PCoA) of the functional β-diversity of the ichthyofauna of the Taquaruçu Reservoir, lower Paranapanema River (the transitional zone between 2006 and 2020).
FIGURE 3 in Taxonomic loss and functional reduction over time in the ichthyofauna of the Taquaruçu Reservoir, lower Paranapanema River, Southern Brazil
FIGURE 3 | Two-dimensional functional space (PCoA) of the ichthyofauna of the Taquaruçu Reservoir, lower Paranapanema River (transitional zone between 2006 and 2020). A, B, C, D = 2006. E, F, G, H = 2020. FRic = Functional richness; FEve = Functional evenness; FDiv = Functional divergence; FDis = Functional dispersion.
FIGURE 2 in Taxonomic loss and functional reduction over time in the ichthyofauna of the Taquaruçu Reservoir, lower Paranapanema River, Southern Brazil
FIGURE 2 | Non-metric multidimensional scaling (NMDS) of the ichthyofauna composition of the Taquaruçu Reservoir, lower Paranapanema River (the transitional zone between 2006 and 2020).
FIGURE 1 in Taxonomic loss and functional reduction over time in the ichthyofauna of the Taquaruçu Reservoir, lower Paranapanema River, Southern Brazil
FIGURE 1 | Location of the samplings points in the Taquaruçu Reservoir, lower Paranapanema River (transitional zone, 2020). Hydroelectric power plants: 1– Rosana; 2– Taquaruçu; 3– Capivara. MS = Mato Grosso do Sul State; PR = Paraná State; SP = São Paulo State.
FIGURE 5 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 5 | Redundancy analysis (RDA). Relation of ichthyofauna to the significant environmental variable (quota) in the drought and wet seasons in an area without the influence of fish farming (Control) at the Ilha Solteira reservoir, Upper Paraná River, São Paulo, Brazil. Ala = Acestrorhynchus lacustris, Acr = Astronotus crassipinnis, Cke = Cichla kelberi, Cpi = Cichla piquiti, Cbr = Cyphocharax gillii, Cgi = Crenicichla britskii, Gsv = Geophagus sveni, Hma = Hoplias aff. malabaricus, Mac = Megalancistrus parananus, Mli = Metynnis lippincottianus, Oni = Oreochromis niloticus, Ppl = Pimelodus platicirris, Ppi = Pinirampus pirinampu, Psq = Plagioscion squamosissimus, Pam = Pterygoplichthys ambrosettii, Rvu = Rhaphiodon vulpinus, Rde = Roeboides descalvadensis, Spa = Satanoperca pappaterra, Sin = Steindachnerina insculpta, Sit = Schizodon intermedius, Sna = Schizodon nasutus, Sma = Serrasalmus maculatus, Smg = Serrasalmus marginatus, Hbu = Heterotilapia buttikoferi, and Tne = Triportheus nematurus.
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