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11 results for “Serrasalmus”
Fig. 3. Serrasalmus maculatus spermatozoa. A in Spermiogenesis and spermatozoa ultrastructure in the Serrasalminae (Ostariophysi: Characiformes) with further evidence on the relationships of the piranhas and pacus
Fig. 3. Serrasalmus maculatus spermatozoa. A - Spermatozoa in longitudinal section. B - Flagellum in longitudinal section. C - Longitudinal section of the nucleus at the nuclear fossa region. D to J - Cross sections in different levels of midpiece. K and L - Flagella in cross sections. Note the vesicles in the initial segment of the flagella. Scale bars A = 0.5 µm; A/Inset = 0.2 µm; B- C = 0.45 µm; D = 0.7 µm; E and F = 0.4 µm; G = 0.5 µm; H and I = 0.55 µm; J = 0.4 µm; K = 0.35 µm; L = 0.6 µm. A: axoneme; C: centriole; D: distal centriole; F: flagellum; M: mitochondria; N: nucleus; P: proximal centriole; V: vesicle; Asterisk: fins; Arrow: electron dense material; Arrowhead: cytoplasmic canal; Double arrow: nuclear fossa; Star: cytoplasmic sleeve.
Fig. 1. Serrasalmus maculatus spermiogenesis. A in Spermiogenesis and spermatozoa ultrastructure in the Serrasalminae (Ostariophysi: Characiformes) with further evidence on the relationships of the piranhas and pacus
Fig. 1. Serrasalmus maculatus spermiogenesis. A to C - Longitudinal sections of early spermatids during the nuclear rotation process. D and E - Longitudinal sections of early spermatids during the chromatin condensation process. F, G and J - Midpiece cross sections. H and I - Flagella in cross sections. Scale bars: A to C = 1 µm; D = 0.85 µm; E = 0.9 µm; F = 0.9 µm; G = 0.75 µm; H = 0.04 µm; I = 0.75 µm; J = 0.6 µm. A: axoneme; C: centriole complex; D: distal centriole; F: flagellum; M: mitochondria; N: nucleus; P: proximal centriole; V: vesicle; Asterisk: fins; Arrow: electron dense material; Arrowhead: cytoplasmic canal; Double arrow: nuclear fossa.
Fig. 4 in Diet of two serrasalmin species, Pygocentrus piraya and Serrasalmus brandtii (Teleostei: Characidae), along a stretch of the rio de Contas, Bahia, Brazil
Fig. 4. Frequency of occurrence (%) of different food items determined by the analysis of the stomach content of Serrasalmus brandtii (a) and Pygocentrus piraya (b) collected between May 2001 and April 2003 according to the three daily sampling periods.
Fig. 2 in Diet of two serrasalmin species, Pygocentrus piraya and Serrasalmus brandtii (Teleostei: Characidae), along a stretch of the rio de Contas, Bahia, Brazil
Fig. 2. Total frequency of occurrence (%) of different food items determined by the analysis of the stomach content of Serrasalmus brandtii and Pygocentrus piraya collected between May 2001 and April 2003 according to the three sampling sites.
Fig. 1 in Diet of two serrasalmin species, Pygocentrus piraya and Serrasalmus brandtii (Teleostei: Characidae), along a stretch of the rio de Contas, Bahia, Brazil
Fig. 1. Location of the sampling sites in the Barragem da Pedra Reservoir, Rio de Contas, Bahia.
Figure 1 in Diversity and ecology of parasitic fauna of the endemic Serrasalmus brandtii Lütken, 1875 from the Caatinga Domain, Brazil
Figure 1. Richness of parasitic infracommunities in Serrasalmus brandtii Lütken, 1875 captured in the Lima Campos dam, municipality of Icó, Ceará state, Brazil.
Data from: Low genetic diversity and complex population structure in black piranha (Serrasalmus rhombeus), a key Amazonian predator
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Fig. 1 in Stress-reducing and anesthetic effects of the essential oils of Aloysia triphylla and Lippia alba on Serrasalmus eigenmanni (Characiformes: Serrasalmidae)
Fig. 1. Time required for induction and recovery of anesthesia in Serrasalmus eigenmanni. a. Aloysia triphylla essential oil. b. Lippia alba essential oil. Different letters indicate significant differences at each stage between treatments based on one-way ANOVA and Tukey tests (P <0.05).
Fig. 4 in Stress-reducing and anesthetic effects of the essential oils of Aloysia triphylla and Lippia alba on Serrasalmus eigenmanni (Characiformes: Serrasalmidae)
Fig. 4. Ammonia excretion of Serrasalmus eigenmanni exposed to essential oils for 4 hours. a. A. triphylla essential oil. b. L. alba essential oil. * indicates a significant difference from control fish and # indicates a significant difference from ethanol-exposed fish, based on one-way ANOVA and Tukey tests (P <0.05).
Fig. 2 in Stress-reducing and anesthetic effects of the essential oils of Aloysia triphylla and Lippia alba on Serrasalmus eigenmanni (Characiformes: Serrasalmidae)
Fig. 2. Swimming time of Serrasalmus eigenmanni exposed to a. A. triphylla essential oil. b. L. alba essential oil. Different letters indicate significant differences at each exposure time between treatments based on the non-parametric Scheirer-Ray-Hare extension of the Kruskal-Wallis test, followed by a post-hoc Nemenyi test. * indicates a significant difference from control fish. # indicates a significant difference from ethanolexposed fish.
Fig. 3 in Stress-reducing and anesthetic effects of the essential oils of Aloysia triphylla and Lippia alba on Serrasalmus eigenmanni (Characiformes: Serrasalmidae)
Fig. 3. Net ion fluxes of Serrasalmus eigenmanni exposed to essential oils for 4 hours. a. A. triphylla essential oil. b. L. alba essential oil. # indicates a significant difference from ethanol-exposed fish, based on one-way ANOVA and Tukey tests (P <0.05).
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International Brain Laboratory public data
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OpenNeuro
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