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56 results for “Salminus”
Fig. 2 in Movement and longitudinal distribution of a migratory fish (Salminus brasiliensis) in a small reservoir in southern Brazil
Fig. 2. Total time spent by dourados (Salminus brasiliensis) in the reservoir (Tin), total time spent in an unknown location (Tun) and total time spent outside of the reservoir in a stretch of the upstream Erechim river (Tout). ANOVA with permutation tested for differences among groups (F(2,54) = 87.17; p <0.0002). The numbers above the plots represent the number of individuals. Different letters above the plots represent significant differences according to Tukey's test. Circles represent outlier values; the heavy horizontal line crossing the box is the median; the bottom and top of the box are the lower and upper quartiles, respectively; and the whiskers are the minimum and maximum values.
FIGURE 3 in Anthropogenic river fragmentation reduces long-term viability of the migratory fish Salminus brasiliensis (Characiformes: Bryconidae) populations
FIGURE 3 | A. Salminus brasiliensis population structure from the Bayesian cluster analysis for K = 2 (see also S1). Black lines separate the different sampled populations based on location (Pop1, Pop2, Pop3, Pop4 and Pop5; Fig. 1). B. DAPC scatterplots and membership probabilities show the first two principal components of the DAPC. Populations are represented in different colors: 1 - Lilac (Pop5); 2 - Green (Pop4), 3 - Orange (Pop3), 4 - Lilac (Pop2) and 5 - Brown (Pop1). C. Membership probabilities (in bar plots), represent individuals in different clusters.
FIGURE 2 in Anthropogenic river fragmentation reduces long-term viability of the migratory fish Salminus brasiliensis (Characiformes: Bryconidae) populations
FIGURE 2 | Predicted genetic diversity in Salminus brasiliensis populations with distinct fragmentation levels over the next 100 years. Using BOTTLESIM 2.6, we estimated the retained percentage of effective number of alleles (Ae) and expected heterozygosity (He) under 100%, 75% and 50% of retain bottleneck scenarios. In all populations, the current population size is unable to maintain 80% of current genetic diveristy, which it is indicated by a red line.
FIGURE 1 in Anthropogenic river fragmentation reduces long-term viability of the migratory fish Salminus brasiliensis (Characiformes: Bryconidae) populations
FIGURE 1 | Study area of Salminus brasiliensis populations in the Uruguay River basin, southern Brazil. A. Picture of Canyon Agusto César Gorge, Upper Uruguay River (acquired rights); B. Picture of Yucumã our Moconá Falls (google font: https://7mar.com.ar/mocona). Salminus brasiliensis (personal picture).
FIGURE 5 in Importance of protection strategies in the conservation of the flagship species "dourado" Salminus brasiliensis (Characiformes: Bryconidae)
FIGURE 5 | ANCOVA interaction effects for the relationship between gonad weight (gw) and body weight (bw) for female (A) and male (D) Salminus brasiliensis. Mean gonadal index (GI) for female (B) and male (E) S. brasiliensis by river (HA – highly altered; MA – moderately altered; LA – less altered). GI for female (C) and male (F) S. brasiliensis over time. GI was measured as the relationship between ln(gw)/ln(bw^1.25) for females and ln(gw)/ln(bw^1.07) for males.
FIGURE 4 in Importance of protection strategies in the conservation of the flagship species "dourado" Salminus brasiliensis (Characiformes: Bryconidae)
FIGURE 4 | ANCOVA interaction effects for the relationship between body weight (bw) and body length (Ls) for female (A) and male (D) Salminus brasiliensis. Mean condition factor (K) for female (B) and male (E) S. brasiliensis by river (HA – highly altered; MA – moderately altered; LA – less altered). Condition factor (K) for female (C) and male (F) S. brasiliensis over time. K was measured as the relationship between ln(bw)/ln(Ls^3.13) for females and ln(bw)/ln(Ls^3.10) for males.
FIGURE 3 in Importance of protection strategies in the conservation of the flagship species "dourado" Salminus brasiliensis (Characiformes: Bryconidae)
FIGURE 3 | Cross-correlations between the temporal abundance series of the less altered (LA) and moderately altered (MA) rivers (LA:MA) and the LA and HA rivers (LA:HA). As sampling was conducted quarterly. A 0.25 lag is equal to three months. HA: Paraná River; MA: Baía River; LA: Ivinhema River). CCF = cross-correlation coefficient. After the prewhitening protocol correlations, <-0.27 and> 0.27 were considered significant (dashed line).
FIGURE 1 in Importance of protection strategies in the conservation of the flagship species "dourado" Salminus brasiliensis (Characiformes: Bryconidae)
FIGURE 1 | Protected areas and sampling stations in the upper Paraná River floodplain. Paraná River (highly altered – HA), Baía River (moderately altered – MA), and Ivinhema River (less altered – LA).
FIGURE 2 in Importance of protection strategies in the conservation of the flagship species "dourado" Salminus brasiliensis (Characiformes: Bryconidae)
FIGURE 2 | Salminus brasiliensis in three rivers of the upper Paraná floodplain. A. Temporal trend in abundance – dashed line indicates the year in which the Porto Primavera Dam began to operate; B. Relationship between water level and abundance (CPUE). The less altered (LA) river has a weaker relationship between water level and young-of-the-year abundance. HA – highly altered (Paraná River), MA – moderately altered (Baía River), and less altered – LA (Ivinhema River); C. Probability of occurrence of the species (All) and young-ofthe-year (YOY).
Fig. 1 in Influence of spawning procedure on gametes fertilization success in Salminus hilarii Valenciennes, 1850 (Teleostei: Characidae): Implications for the conservation of this species
Fig. 1. Fertilization rates of Salminus hilarii for G1 (wild broodstock), G2 (domesticated broodstock), G3 (wild females, manually stripped) and G4 (domesticated females, manually stripped) at the Ponte Nova Fish Farm. Values (mean ± standard error of the mean) followed by different symbol are significantly different between experimental groups.
Fig. 2 in Influence of spawning procedure on gametes fertilization success in Salminus hilarii Valenciennes, 1850 (Teleostei: Characidae): Implications for the conservation of this species
Fig. 2. Microscopic aspect of the ovaries and macroscopic aspect of Salminus hilarii larvae: a. micrograph of a mature ovary, showing the vitellogenic oocytes; b. micrograph of the ovary showing an atretic oocyte. Scale bars: (a) 300 m and (b) 100 m;
Fig. 1 in Juveniles of the piscivorous dourado Salminus brasiliensis mimic the piraputanga Brycon hilarii as an alternative predation tactic
Fig. 1. Aggressive mimicry between the dourados Salminus brasiliensis and the piraputanga Brycon hilarii. Notice the resemblance in fins, general body colours and shape between the dourado (top) and the piraputanga (bottom) (a). Mixed school of about 30 cm total length piraputangas and dourados; the white circles point the similarity in caudal fin's colour in live individuals of both species (b). Juvenile dourados (black arrows) mimicking the piraputangas in a mixed school, both fishes were about 30 cm TL (c). Adult dourado preying a piraputanga; mimicry is expected to end when dourados are 0.3 times bigger than the piraputangas that they eat (d). Photos: JS (a and d), LNC (b and c).
Fig. 7 in Dermal lip protuberances associated with aquatic surface respiration in juveniles of the piscivorous characid Salminus brasiliensis (Actinopterygii: Characidae)
Fig. 7. Relative position of the mouth corner in the water column during ASR in an individual of S. brasiliensis with typical lip (a) and another with lip protuberances (b). The drawing represents individuals with smaller mouth opening than those of Fig. 1, so that lateral lobes of the protuberance come in contact to cover the sides of the mouth.
Fig. 6 in Dermal lip protuberances associated with aquatic surface respiration in juveniles of the piscivorous characid Salminus brasiliensis (Actinopterygii: Characidae)
Fig. 6. Relationship between MLW (maximum lip width) and water dissolved oxygen. Values of lip size are expressed as proportions of standard length of the body.
Fig. 4 in Dermal lip protuberances associated with aquatic surface respiration in juveniles of the piscivorous characid Salminus brasiliensis (Actinopterygii: Characidae)
Fig. 4. Transversal cross-section of the lateral portion of lower lip from an individual of Salminus brasiliensis, (a) with typical lip and (b) with dermal lip protuberance. EP = epidermis, SS = stratum spongiosum, LE = lateral edge, arrow indicates the lateral lobe of the dermal lip protuberance. Scale bar = 0.25 mm.
Fig. 2 in Dermal lip protuberances associated with aquatic surface respiration in juveniles of the piscivorous characid Salminus brasiliensis (Actinopterygii: Characidae)
Fig. 2. Measurements taken in the lower jaw of S. brasiliensis. LW: Median lip width, MLW: Maximum lip with.
Fig. 1 in Dermal lip protuberances associated with aquatic surface respiration in juveniles of the piscivorous characid Salminus brasiliensis (Actinopterygii: Characidae)
Fig. 1. Map showing the location of Salado River in Santa Fe Province (Argentina) (left) and inset showing the study region (right). Shaded sectors indicate floodplain areas containing the sampled lakes.
Fig. 3 in Age, growth, mortality and yield per recruit of the dourado Salminus brasiliensis, Corumbá Reservoir, Goiás State, Brazil
Fig. 3. Frequency per age (years) of Salminus brasiliensis individuals from Corumbá Reservoir, upstream and tributaries.
Fig. 4 in Age, growth, mortality and yield per recruit of the dourado Salminus brasiliensis, Corumbá Reservoir, Goiás State, Brazil
Fig. 4. (a) Simulation of the yield per recruit (g) in different scenarios of fishing mortality (year-1). Each curve represents a natural mortality rate (year-1) (0.1 to 0.6 with intervals of 0.1) for S. brasiliensis in the area of influence of Corumbá Reservoir. (b) Simulation of the average weight (g) in different scenarios of fishing mortality (year-1). Each curve represents a natural mortality rate (year-1) (0.1 to 0.6 with intervals of 0.1) for S. brasiliensis in the area of influence of Corumbá Reservoir.
Fig. 2 in Age, growth, mortality and yield per recruit of the dourado Salminus brasiliensis, Corumbá Reservoir, Goiás State, Brazil
Fig. 2. Monthly average (mean ± standard error; SE) of the marginal increment in scales of the dourado Salminus brasiliensis in the area of influence of Corumbá Reservoir.
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