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16 results for “Symphysodon”
Fig. 2 in Scientific Note Reproductive and population parameters of discus fish Symphysodon aequifasciatus Pellegrin, 1904 (Perciformes: Cichlidae) from Piagaçu-Purus Sustainable Development Reserve (RDS-PP),
Fig. 2. Oocyte size distribution of pre-spawning female discus Symphysodon aequifasciatus captured in November 2006 in Ayapuá Lake (AM) showing four types of egg distribution.
Fig. 1. Length x in Scientific Note Reproductive and population parameters of discus fish Symphysodon aequifasciatus Pellegrin, 1904 (Perciformes: Cichlidae) from Piagaçu-Purus Sustainable Development Reserve (RDS-PP),
Fig. 1. Length x weight plots for specimens of Symphysodon aequifasciatus captured in Ayapuá Lake during September- November 2006 and 2007.
Fig. 8 in Ecology and life history of an Amazon floodplain cichlid: the discus fish Symphysodon (Perciformes: Cichlidae)
Fig. 8. Length vs. weight plots for male and female Symphysodon haraldi from a single colony in Uxi Bay, lago Amanã.
Fig. 12 in Ecology and life history of an Amazon floodplain cichlid: the discus fish Symphysodon (Perciformes: Cichlidae)
Fig. 12. Histogram showing size distribution of n = 1271 ovules from a pre-spawning (stage 4) female Symphysodon haraldi. Column bin-intervals are 0.05 mm.
Fig. 9 in Ecology and life history of an Amazon floodplain cichlid: the discus fish Symphysodon (Perciformes: Cichlidae)
Fig. 9. Frequency distribution of the size of Symphysodon haraldi from a single large colony in Uxi Bay, lago Amanã. Column bin-intervals are 3 mm. See Fig. 2 for the timing of sampling in (a) 1998 and (b) 1997. Specimens parasitized with Braga cichlae are excluded. Major modes in the multi-modal distribution of SL are marked with dotted lines and labeled as putative cohort groups (0, 1a, 1b, 2a, 2b, 3, 4) (refer to Fig. 2). Arrows on the x-axis mark the maximum known size of females. X refers to a male specimen marked and released on 20 December 1997 (X1), and recaptured (X2) on 16 November 1998. The overlapping shaded histogram for the 1998 data refers to seven discus captured in adjacent shore scrub. The histograms distributions marked by the beginnings and ends of the dotted triangles for 1a, 1b, and 2 in 1998, and 2a, 2b and 3 in 1997 fit normal distributions (p <0.01, one sample Kolmogorov-Smirnov tests).
Fig. 6 in Ecology and life history of an Amazon floodplain cichlid: the discus fish Symphysodon (Perciformes: Cichlidae)
Fig. 6. Shoreline distance dispersed by 104 tagged Symphysodon haraldi over a 7-9 day period in Uxi Bay, lago Amanã subsequent to release at their original capture site. Each bar represents a 5 m distance range.
Fig. 5 in Ecology and life history of an Amazon floodplain cichlid: the discus fish Symphysodon (Perciformes: Cichlidae)
Fig. 5. Seasonal changes in the proportional composition of food items within stomachs of Symphysodon haraldi from blackwater habitats of the Tefé region. Calculations of mean food item contribution excluded specimens with empty stom- achs. Error bars (displayed above bars) refer to one standard deviation from mean. Algae = periphyton identified as a mass of bright green filamentous structures. FOD = Fine organic detritus. GPM = green plant (macrophytes) matter – apparently mostly small triturated pieces of leaves. Periphyton, FOD and GPM were difficult to separate volumetrically, and are there- fore combined into a single category. GPM represented only a small portion of the volume of this category (perhaps less than 15%). COD = Coarse organic detritus – mainly pieces of wood and bark.
Fig. 11 in Ecology and life history of an Amazon floodplain cichlid: the discus fish Symphysodon (Perciformes: Cichlidae)
Fig. 11. Reproductive status and sex of putative (a) 1+ and (b) 2+ cohort members Symphysodon haraldi from a single large discus colony in Uxi Bay, lago Amanã, 1998. Only specimens that were dissected for sex determination are included. The single 1+ specimen with a stage 4 gonad is illustrated in Fig. 12c.
Fig. 1. NASDA JERS-1 in Ecology and life history of an Amazon floodplain cichlid: the discus fish Symphysodon (Perciformes: Cichlidae)
Fig. 1. NASDA JERS-1 radar image of the Tefé region, Brazil: (a) high water (May 1995); (b) low water (September 1995). Flooded forests appear white, illustrating the maximum extent of the seasonal flooding. The area between the dotted lines is whitewater floodplain. R. Solimões is the local name for the Amazon River. Discus occur in the following habitats: 1, blackwater flooded forest (igapó), 2, blackwater lakes, 3, whitewater flooded forest, 4, whitewater floodplain lakes. Study are marked A (Uxi Bay) and B (lago Urini). Inset (c) shows Uxi Bay from Landsat TM-5 image, 1998. Here, the white dot represents the locality of a large discus colony and the line X-Y refer to the cross-sectional schematic (d). In (d) the dotted horizontal line represents the water level at the beginning of 1998 samples. The 4 m water-level (see also Fig. 2) marks the lower levels of shore scrub growing on beaches and sand bars. Shore scrub is dominated by Coccoloba ovata Benth. and Symmeria paniculata Benth. (Polygonaceae).
Fig. 1 in Chromosomal variability in the wild ornamental species of Symphysodon (Perciformes: Cichlidae) from Amazon
Fig. 1. Photo of analyzed species: (A) Symphysodon haraldi from Manacapuru, (B) S. aequifasciatus from Tefé, (C) S. discus from Barcelos, and map showing the location of discus sampling sites.
Fig. 3 in Ecology and life history of an Amazon floodplain cichlid: the discus fish Symphysodon (Perciformes: Cichlidae)
Fig. 3. Sampling of a small submerged tree crown or 'galhada'
Fig. 7 in Ecology and life history of an Amazon floodplain cichlid: the discus fish Symphysodon (Perciformes: Cichlidae)
Fig. 7. Length vs. weight plots for Symphysodon haraldi specimens parasitized with the isopod gill parasite Braga cichlae, and unparasitized specimens. All specimens are from a single colony of discus in Uxi Bay, lago Amanã.
Fig. 4 in Ecology and life history of an Amazon floodplain cichlid: the discus fish Symphysodon (Perciformes: Cichlidae)
Fig. 4. (right column) Testes and ovaries of Symphysodon haraldi at advancing stages of gonadal development. Photographs are from freshly sacrificed and dissected specimens, with the gonads outlined for clarity. The following modified version of Nikolsky's scale of reproductive maturity was utilized: 0. (immature): gonads thin and transparent; sex determination not possible (not illustrated). 1. (early development or resting): testes thin and translucent; ovaries thin and translucent-pink with transparent eggs. 2. (maturing): testes translucent white; ovaries enlarged with white eggs. 3. (mature): testes thick and white; ovaries enlarged with largest eggs yellow. 4. (pre-spawning): testes swollen and sperm-positor everted; ovaries swollen with largest eggs orange, swollen and approximately 1.4 mm in diameter, ovipositor everted. 5. (spent): testes flaccid; ovaries flac- cid with scattered eggs of various size classes (not illustrated).
Fig. 2 in Ecology and life history of an Amazon floodplain cichlid: the discus fish Symphysodon (Perciformes: Cichlidae)
Fig. 2. (a) Flood level and (b) electrical conductivity (EC) monitored in lago Amanã during the period 1995-1998. The timing of sampling in Uxi Bay is marked by A (1998) and B (1997). Dotted horizontal lines mark where shore-scrub (4m) and higher portions of blackwater igapó forest (10m) are inun- dated (Fig. 1). Dotted circles are speculated spawning events for the putative cohort groups 1a through 3 (refer to Fig. 8).
Functional categorization of transcriptome in the species Symphysodon aequifasciatus Pellegrin 1904 (Perciformes: Cichlidae) exposed to benzo[a]pyrene and phenanthrene
GEO Series GSE51149. Symphysodon aequifasciata. 2 samples. Type: Expression profiling by high throughput sequencing.
Differential expression and correlation analysis of mRNA and miRNA based on Brain transcriptome in the discus fish (Symphysodon aequifasciatus)
GEO Series GSE140349. Symphysodon aequifasciata. 2 samples. Type: Expression profiling by high throughput sequencing.
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