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10 results for “Plagioscion”
FIGURE 6 in Fishers' knowledge on abundance and trophic interactions of the freshwater fish Plagioscion squamosissimus (Perciformes: Sciaenidae) in two Amazonian rivers
FIGURE 6 | The mean number of prey items of Plagioscion squamosissimus is cited by the interviewed fishers in the Tapajós and Tocantins rivers. Mean (dark vertical line), data distribution (bean gray area), data (points) correspond to individual fishers, confidence interval (rectangle). The median was 2 for
FIGURE 3 in Fishers' knowledge on abundance and trophic interactions of the freshwater fish Plagioscion squamosissimus (Perciformes: Sciaenidae) in two Amazonian rivers
FIGURE 3 | Paired comparison between the relative abundance (% of biomass in kg) in samples and relative importance for fisheries (% of citations in interviews) of Plagioscion squamosissimus in the Tapajós River. Dots indicate the sampling sites for biomass and fishing communities for interviews.
FIGURE 4 in Fishers' knowledge on abundance and trophic interactions of the freshwater fish Plagioscion squamosissimus (Perciformes: Sciaenidae) in two Amazonian rivers
FIGURE 4 | Mean size (standard length in cm) of Plagioscion squamosissimus sampled in the Tapajós and Tocantins rivers. Mean (dark horizontal line), data distribution (bean gray area), data (points), confidence interval (rectangle). The median sizes of P. squamosissimus were 23.6 cm in the Tapajós and 22.7 cm in the Tocantins.
FIGURE 5 in Fishers' knowledge on abundance and trophic interactions of the freshwater fish Plagioscion squamosissimus (Perciformes: Sciaenidae) in two Amazonian rivers
FIGURE 5 | Diagram depicting the main trophic interactions (simplified food web) of Plagioscion squamosissimus based on fishers' LEK (interviews) indicating the 10 most cited prey (yellow) and the 14 most cited predators (red), in the Tapajós (blue) and Tocantins (green). Numbers inside squares are the percent of citations of prey and predators of P. squamosissimus by the interviewed fishers. We obtained 150 citations of prey and 129 citations of predators by the interviewed fishers in the Tapajós River and 56 citations of prey and 50 citations of predators in the Tocantins River. Line thicknesses indicate the number of citations by the fishers interviewed.
FIGURE 1 in Fishers' knowledge on abundance and trophic interactions of the freshwater fish Plagioscion squamosissimus (Perciformes: Sciaenidae) in two Amazonian rivers
FIGURE 1 | Map of the studied region in the middle course of the Tapajós, Tocantins-Araguaia rivers, in the Brazilian Amazon, showing the fishing communities and distribution of biomass of Plagioscion squamosissimus (black circle) sampled where the research (fish sampling and interviews) was conducted.
FIGURE 2 in Fishers' knowledge on abundance and trophic interactions of the freshwater fish Plagioscion squamosissimus (Perciformes: Sciaenidae) in two Amazonian rivers
FIGURE 2 | Comparison of mean relative relevance to fisheries (% of citations in interviews) of Plagioscion squamosissimus according to the interviewed fishers in the Tapajós (n = 7) and Tocantins (n = 4) rivers. Mean (dark horizontal line), data distribution (bean gray area), data (points), confidence interval (rectangle). Points indicate the fishing communities, considered as replicates in this analysis.
Fig. 4 in Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil
Fig. 4. Mean values of ∆RGS (a) and ∆K (b) and frequency of bi-monthly percentage of the maturational stages for the females (c) of Plagioscion magdalenae in the bay of Marajo.
Fig. 3 in Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil
Fig. 3. Photomicrographs of Plagioscion magdalenae ovarian tissue at various maturity stages. a) Immature, HE, 100x. b) Maturing, HE, 100x. c) Mature, HE, 40x. d) Spawned/spent, HE, 40x. I. chromatin nucleolus (stage I); II. perinucleolar stage (stage II); III. cortical alveoli oocytes (stage III); IV. full vitellogenic (stage IV); pf. postovulatory follicles; at. atretic follicles.
Fig. 1 in Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil
Fig. 1. Study area. Bay of Marajo in theAmazon Estuary, Brazil.
Fig. 2 in Reproductive biology of Plagioscion magdalenae (Teleostei: Sciaenidae) (Steindachner, 1878) in the bay of Marajo, Amazon Estuary, Brazil
Fig. 2. Size of first maturity (L) of Plagioscion magdalenae 50 for grouped sexes (a), males (b) and females (c) in the bay of Marajo.
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