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221 results for “Pimelodidae”
Fig. 3 in Upstream dam impacts on gilded catfish Brachyplatystoma rousseauxii (Siluriformes: Pimelodidae) in the Bolivian Amazon
Fig. 3. Mean annual fishing effort and capture per unit effort (CPUE) of Brachyplatystoma rousseauxii (black bars) per month in the Ichilo River before (1998–2007) and after dam closure (2015–2017) using catfish-specific fishing methods. Mean monthly water level (MWL) in Puerto Villarroel for the two sample periods is shown (SENAMHI 2018), with vertical lines representing standard deviation. The horizontal bars show the period when commercial fishing is prohibited.
Fig. 1 in Upstream dam impacts on gilded catfish Brachyplatystoma rousseauxii (Siluriformes: Pimelodidae) in the Bolivian Amazon
Fig. 1. Upper Madeira River basin, showing landing site Puerto Villarroel and fishing area in the Ichilo River (Bolivian Amazon), as well as the Santo Antônio and Jirau dams (Brazilian Amazon).
Fig. 3 in Population and reproductive parameters of the red-tailed catfish, Phractocephalus hemioliopterus (Pimelodidae: Siluriformes), from the Xingu River, Brazil
Fig. 3. Size at first sexual maturity in the red-tailed catfish Phractocephalus hemioliopterus specimens collected from the Xingu River in Pará, Brazil.
Fig. 5 in Population and reproductive parameters of the red-tailed catfish, Phractocephalus hemioliopterus (Pimelodidae: Siluriformes), from the Xingu River, Brazil
Fig. 5. Relative frequency (%) of the different gonadal maturation stages of the red-tailed catfish Phractocephalus hemioliopterus specimens collected from the Xingu River in Pará, Brazil. a. males; and b. females.
Fig. 3. Karyotypes after FISH with 5S in Contributions to the systematic of Pimelodidae (Osteichthyes, Siluriformes): basic and molecular cytogenetics on seven species of Pimelodus from three Brazilian hydrographic systems
Fig. 3. Karyotypes after FISH with 5S rDNA probes (red) and 18S rDNA probe (green). a. Pimelodus absconditus; b. Pimelodus britskii; c. Pimelodus maculatus; d. Pimelodus microstoma; e. Pimelodus mysteriosus; f. Pimelodus ortmanni; g. Pimelodus paranaensis. Scales bar = 10 μm.
Fig. 2. Karyotypes arranged from C-banded chromosomes. a in Contributions to the systematic of Pimelodidae (Osteichthyes, Siluriformes): basic and molecular cytogenetics on seven species of Pimelodus from three Brazilian hydrographic systems
Fig. 2. Karyotypes arranged from C-banded chromosomes. a. Pimelodus absconditus; b. Pimelodus britskii; c. Pimelodus maculatus; d. Pimelodus microstoma; e. Pimelodus mysteriosus; f. Pimelodus ortmanni; g. Pimelodus paranaensis. B chromosomes in the boxes. Scales bar = 10 μm.
Fig. 5 in Contributions to the systematic of Pimelodidae (Osteichthyes, Siluriformes): basic and molecular cytogenetics on seven species of Pimelodus from three Brazilian hydrographic systems
Fig. 5. Cytogenetics data and phylogenetic relationships between Pimelodidae (modified from Lundberg et al., 2011). N= Neopimelodines; S= Sorubimines; CP= Calophysus-Pimelodus Clade; C = Calophysines; PI = Pimelodus Group; 2n = number diploid; p = short arm; q = long arm; S = simple; M = multiple.
Fig. 3 in A case of intersex occurrence in Steindachneridion parahybae (Steindachner, 1877) (Siluriformes: Pimelodidae) under captivity condition: a cytogenetic and morphological study
Fig. 3. Micrographs of the ovotestes of Steindachneridion parahybae juveniles in captivity showing the different germ cell types. a) unrestricted spermatogonial testes with anastomosing tubular type, composed by numerous tubules (arrowhead); b) many spermatozoa inside the tubular lumen (arrowhead), separated by interstitial tissue (asterisk); c) gonads section showing perinucleolar oocyte (arrow) close to testicular tissue (arrowhead), containing spermatozoa inside the duct and many intratubular cists; d) ovotestes showing perinucleolar oocyte (arrow) close to spermatozoa inside the duct (arrowhead). Periodic-Acid-Schiff (PAS)/Weigert's Haematoxylin/Metanil Yellow staining. Scale bars: 74 µm (a); 19 µm (b, d); 37 µm (c).
Fig. 4 in A case of intersex occurrence in Steindachneridion parahybae (Steindachner, 1877) (Siluriformes: Pimelodidae) under captivity condition: a cytogenetic and morphological study
Fig. 4. Karyotype in Giemsa in male (a), detail in (b), in female (c), detail in (d) and in intersex animal (e), detail in (f) of Steindachneridion parahybae from Unidade de Hidrobiologia e Aquicultura, Companhia Energética de São Paulo. See the text for more information about karyotype characteristics. Scale bars: 37 μm (a,c,e); 7,4 μm (b,d,f).
Fig. 2 in A case of intersex occurrence in Steindachneridion parahybae (Steindachner, 1877) (Siluriformes: Pimelodidae) under captivity condition: a cytogenetic and morphological study
Fig. 2. Micrographs of the testes of Steindachneridion parahybae juveniles in captivity showing the different germ cell types. a) unrestricted spermatogonial testes with anastomosing tubular type, composed by numerous tubules (arrowhead), which contained the germinal compartment (GC, indicate with arrow) and separated by interstitial tissue; b) isolated spermatogonia cell (arrow) surrounded by Sertoli cells (arrowhead), separated by interstitial tissue (asterisk); c) many spermatocytes and spermatids within the cysts (arrowhead), separated by interstitial tissue (asterisk); d) cysts of spermatocytes (arrowhead), separated by interstitial tissue (asterisk); e) cysts of spermatids (arrowhead), separated by interstitial tissue (asterisk); f) many spermatozoa inside the tubular lumen (arrowhead). Periodic-Acid-Schiff (PAS)/Weigert's Haematoxylin/Metanil Yellow staining. Scale bars: 74µm (a); 37 µm (f); 19 µm (c,e); 14 µm (b); 7.4 µm (d).
Fig. 1 in Induced spawning and early ontogeny in hatchery-reared catfish Zungaro jahu (Siluriformes: Pimelodidae)
Fig. 1. Steromicroscopic images of fresh oocytes (a; 1.6 mm in diameter), eggs (b-k; ~2.4 mm in diameter), embryos (l-m; ~2.4 mm in diameter), and free embryo (l-n; 4.3 mm TL) of jahu in hatchery conditions. a) recently spawned oocyte covered by the jelly coat (arrow); b) egg showing a large perivitelline space and two blastomeres of same size (45 min post fertilization, PF); c) dorsal view of egg seen in b; d) egg with four blastomeres of same size (50 min PF); e) egg with eight blastomeres of same size (50 min PF); f) egg with sixteen blastomeres of same size (1 h 15 min PF); g) egg with thirty-two blastomeres of same size (1 h 20 min PF); h) morula stage (2 h 10 min PF); i) half of the yolk sphere (circa 50% epiboly) was covered with the blastoderm (4 h 50 min PF); j) formation of the yolk plug circa 90% epiboly (6 h 30 min PF); k) end of epiboly with closure of embryo ring (blastopore) (7 h 30 min PF); l) embryo exhibiting optic calyx (OC), otic vesicle (OV), Kupffer's vesicle (KV), and 13 somites (10 h 30 min); m) embryo within egg envelop exhibiting free, beating tail (13 h 30 min PF); n) free embryo, the almost transparent body is involved by the primordial fin fold; head and anterior part of body over the yolk sac; non-pigmented retina; mouth is closed; notochord slightly flexed; 39.1 ± 2.0 miotomes (circa 6 h post hatching).
Fig. 3 in Sound production and pectoral spine locking in a Neotropical catfish (Iheringichthys labrosus, Pimelodidae)
Fig. 3. Sonogram (top) and oscillogram (below) swimbladder drumming sounds recorded underwater illustrating sound characteristics measured. TD = train durations; SD = sound duration; PP = pulse period; PD = pulse durations.
Fig. 1 in Sound production and pectoral spine locking in a Neotropical catfish (Iheringichthys labrosus, Pimelodidae)
Fig. 1. Sonogram (top) and oscillogram (below) of pectoral sounds illustrating sound characteristics measured. TD = train durations; SD = sound duration; PP = pulse period; PD = pulse durations.
Fig. 2 in Sound production and pectoral spine locking in a Neotropical catfish (Iheringichthys labrosus, Pimelodidae)
Fig. 2. Oscillogram of pectoral sound (all pulses in the oscillogram) emitted by Iheringichthys labrosus caught in the net in field.
Fig. 4 in Reproduction of Pimelodus maculatus (Siluriformes: Pimelodidae) in three section of Grande River basin, downstream Porto Colombia dam, south-eastern Brazil
Fig. 4. Bimonthly frequency of the gonadal maturation stages of P. maculatus males and females from three sampling sections of the Grande River basin, downstream from the Porto Colômbia dam. Section 1: Grande River, downstream from the Porto Colômbia dam; Section 2: confluence of the Grande and Pardo Rivers; Section 3: the Pardo River channel.
Fig. 5 in Reproduction of Pimelodus maculatus (Siluriformes: Pimelodidae) in three section of Grande River basin, downstream Porto Colombia dam, south-eastern Brazil
Fig. 5. PH, dissolved oxygen, electrical conductivity, temperature and water transparency in three sections of the Grande River basin, downstream from the Porto Colômbia dam. Section 1: Grande River, downstream from the Porto Colômbia dam; Section 2: confluence of the Grande and Pardo Rivers; Section 3: the Pardo River channel.
Fig. 3 in Reproduction of Pimelodus maculatus (Siluriformes: Pimelodidae) in three section of Grande River basin, downstream Porto Colombia dam, south-eastern Brazil
Fig. 3. Histological sections of P. maculatus ovaries, in different stages of gonadal maturation, stained with HE. A: Resting, with oogonia nests (Og), initial perinucleolar oocyte (O1) with basophilic cytoplasm and advanced perinucleolar follicles (O2) with granular cytoplasm; B: Initial maturation, with O1, O2 and pre-vitellogenic oocyte (O3) presenting cortical alveoli (arrow head) in the peripheral ooplasm; C: Advanced maturation/mature with O1, O2 and O3 and vitellogenic oocytes with ooplasm filled with acidophilic yolk globules; D: Detail of vitellogenic oocyte with cubic follicular cells (star), thin zona pellucida (*) and funnel-shaped micropile (arrow); E: Partially spawned, with O1, O2, O3, O4 and postovulatory follicles (FPO); insert of post-ovulatory follicle with wide lumen and wall of follicular cells and theca; F: Atretic follicles (AF) in the initial phase with yolk liquefaction and fragmentation of the zona pellucida; G: Partially spawned ovary with atretic follicle (AF) in the intermediate phase with hypertrophy of the follicular cells and an almost fully reabsorbed yolk; H: Fully spawned ovary with O1, O2 and atretic follicle in the final stage, forming yellow bodies (YB). Scale bars = 50 µm (A, D, insert of POF and H), 100 µm (B, C), 200 µm (E-G).
Fig. 2 in Reproduction of Pimelodus maculatus (Siluriformes: Pimelodidae) in three section of Grande River basin, downstream Porto Colombia dam, south-eastern Brazil
Fig. 2. Histological sections of P. maculatus testes, in different stages of gonadal maturation, stained with HE. A: Resting with seminiferous tubules closed containing only spermatogonia; B: Initial maturation, with seminiferous tubules containing all spermatogenic lineage cells and a small amount of sperm; C: Advanced maturation/mature, with seminiferous tubules filled with sperm; D: Partially spent, with open seminiferous tubules containing a considerable amount of sperm; E: Caudal region of a partially spent testis with globular acidophilic secretion (circle); F: fully spent, with open seminiferous tubules containing residual sperm in the lumen. * = Sperm; Arrow = Spermatogonia. Scale bars = 20 µm (A), 50 µm (B and F), 100 µm (C-E).
Fig. 7 in Taxonomy of Pimelodus brevis Marini, Nichols & La Monte, 1933 (Siluriformes: Pimelodidae), an uncertain species from the rio Paraná basin
Fig. 7. Partial map of South America with the geographic distribution of Pimelodus argenteus (black dots) and the type localities of P. albicans (brown star); P. atrobrunneus (yellow star); P. argenteus (gray star), and P. brevis (red star).
Fig. 5 in Taxonomy of Pimelodus brevis Marini, Nichols & La Monte, 1933 (Siluriformes: Pimelodidae), an uncertain species from the rio Paraná basin
Fig. 5. Linear regression of percent of body depth on standard length of Pimelodus argenteus, P. albicans, and P. brevis. R2 = coefficient of determination.
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Allen Brain Atlas
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International Brain Laboratory public data
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OpenNeuro
OpenNeuro is a free, open platform for sharing neuroimaging datasets, with public search, dataset pages, and download paths for web, S3, DataLad, and the OpenNeuro CLI.