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50 results for “freshwater ecoregions”
Fig. 2. Area diagram depicting relationships among the 24 in Biogeography of freshwater fishes from the Northeastern Mata Atlântica freshwater ecoregion: distribution, endemism, and area relationships
Fig. 2. Area diagram depicting relationships among the 24 coastal drainages analyzed, obtained by parsimony analysis of endemicity based on freshwater fishes. The topology represents the strict consensus of five equally parsimonious trees obtained through a heuristic search (length= 71 steps, CI = 0.521, RI = 0.709).
Fig. 1 in Biogeography of freshwater fishes from the Northeastern Mata Atlântica freshwater ecoregion: distribution, endemism, and area relationships
Fig. 1. Map showing the Northeastern Mata Atlântica ecoregion, the rivers included in the PAE, and the groups recovered from the analysis. Adjacent freshwater ecoregions are: (327) São Francisco, (329) Paraíba do Sul, and (344) Upper Paraná.
Fig. 1 in Working towards a conservation plan for fish parasites: Cyprinid parasites from the south African cape fold freshwater ecoregion as a case study
Fig. 1. Map illustrating localities where the five cyprinid hosts were collected in the Cape Fold ecoregion in the Western Cape, South Africa.
Fig. 7 in Working towards a conservation plan for fish parasites: Cyprinid parasites from the south African cape fold freshwater ecoregion as a case study
Fig. 7. Rarefaction/extrapolation curve estimating the diversity of parasites as a function of sampling effort for three of the five hosts collected in the OlifantsDoorn River System, Western Cape Province, South Africa. Shaded area represents the 95% confidence interval obtained using the bootstrap method based on 100 repetitions. Created using iNEXT Online (Chao et al., 2016).
Fig. 4 in Working towards a conservation plan for fish parasites: Cyprinid parasites from the south African cape fold freshwater ecoregion as a case study
Fig. 4. Pseudobarbus calidus (Barnard, 1938) (max. length: 125 mm) (A). Sclerites of Paradiplozoon sp. from the gills (B). Acanthocephala from the body cavity, whole specimen (C) and hooks on proboscis (top left insert). Larval Contracaecum sp. from the body cavity, anterior (D) and posterior (E) ends, lateral view. Scale bars: 100 μm (B, C, D, E).
Fig. 6 in Working towards a conservation plan for fish parasites: Cyprinid parasites from the south African cape fold freshwater ecoregion as a case study
Fig. 6. Sedercypris erubescens (Skelton, 1974) (max. length: 120 mm) (A). Larval Contracaecum sp. from the body cavity, anterior (B) and posterior (C) ends, lateral view. Scale bars: 100 μm (B, C).
Fig. 5 in Working towards a conservation plan for fish parasites: Cyprinid parasites from the south African cape fold freshwater ecoregion as a case study
Fig. 5. Pseudobarbus phlegethon (Barnard, 1938) (max. length: 65 mm) (A); Acanthogyrus sp. found from the body cavity (B). Scale bar: 500 μm.
Fig. 3 in Working towards a conservation plan for fish parasites: Cyprinid parasites from the south African cape fold freshwater ecoregion as a case study
Fig. 3. Labeobarbus seeberi (Gilchrist et Thompson, 1913) (max. length: 270 mm) (A); Myxobolus sp. (B) and Dactylogyrus sp. from the gills of L. seeberi, hamuli and marginal hooks (C), male copulatory complex (D) and vagina (E). Lateral view of Rhabdochona sp. 2 from the intestine, anterior end of female (F) and male (G), posterior end of male (H); metacercariae of Diplostomidae (I) from black cysts on skin. Scale bars: 10 μm (B); 50 μm (D, E); 100 μm (C, F, G, H, I).
Fig. 2 in Working towards a conservation plan for fish parasites: Cyprinid parasites from the south African cape fold freshwater ecoregion as a case study
Fig. 2. Cheilobarbus serra (Peters, 1864) (max. length: 350 mm) (A); adult Paradiplozoon sp. (B) and sclerites in attachment clamps (C, D) found on the gills; hamuli of Gyrodactylus sp. (E) and marginal hooks (F), and a pre-metamorphic stage of the copepod belonging to the Lernaeidae (G), both from the gills. Anterior (H) and posterior (I) ends of Rhabdochona sp. 1 (lateral view) from the intestine; (J) whole specimen of the Caryophyllidea. Scale bars: 10 μm (E, F); 100 μm (C, D, G, H, I); 500 μm (B); 1000 μm (J).
FIGURE 2 in Phylogeography of Oligosarcus acutirostris (Characiformes: Characidae): testing biogeographic hypotheses in the Northeastern Mata Atlântica freshwater ecoregion
FIGURE 2 | A. Map showing part of the Northeastern Mata Atlântica freshwater ecoregion (NMAF) and the distribution of Oligosarcus acutirostris samples analyzed in this study. Adjacent freshwater ecoregions sensu Abell et al. (2008): (327) São Francisco, (329) Paraíba do Sul, and (344) Upper Paraná. Costal paleodrainages based on Thomaz, Knowles (2018): (107) Santo Antônio + João de Tiba and (110) Mucuri + Barra Seca; B and C. Haplotype networks showing the genetic connectivity among the haplotypes of O. acutirostris, which are represented by circles, the size proportional to their frequencies. Each trace corresponds to a single mutation. Colors correspond to the sampled river basins as in Fig. 2A; B. Haplotype network based on COI dataset (604 bp, 24 specimens, 11 haplotypes). Black circles represent median vectors; C. Haplotype network based on Myh6 dataset (587 bp, 27 specimens, five haplotypes).
FIGURE 1 in Phylogeography of Oligosarcus acutirostris (Characiformes: Characidae): testing biogeographic hypotheses in the Northeastern Mata Atlântica freshwater ecoregion
FIGURE 1 | Bayesian phylogenetic trees of Oligosarcus acutirostris obtained in this study indicating the relationships among analyzes specimens. Numbers at branches are posterior probabilities. A. Topology based on mitochondrial gene cytochrome oxidase I (COI, 604 bp); B. Topology based on nuclear gene myosin heavy chain 6 cardiac muscle alpha (Myh6, 587 pb); and C. Topology based on concatenated dataset (COI+Myh6, 1,191 bp). The highlighted colors in the topologies represent each sampled river basin as indicated in the legend (below/right) and showed in Fig. 2A.
Data from: mapping endemic freshwater fish richness to identify high priority areas for conservation: an ecoregion approach
<p>Freshwater ecosystems are experiencing accelerating global biodiversity loss. Thus, knowing where these unique ecosystems' species richness reaches a peak can facilitate their conservation planning. By hosting more than 290 freshwater fishes, Iran is a major freshwater fish hotspot in the Middle East. Considering the accelerating rate of biodiversity loss, there is an urgent need to identify species rich areas and understanding of the mechanisms driving biodiversity distribution. In this study, we gathered distribution records of all endemic freshwater fishes of Iran (85 species) to develop their richness map and determine the most critical drivers of their richness patterns from an ecoregion approach. We performed a generalized linear model (GLM) with quasi-Poisson distribution to identify contemporary and historical determinants of endemic freshwater fish richness. We also quantified endemic fish similarity among the 15 freshwater ecoregions of Iran. Results showed that endemic freshwater fish richness is highest in the Zagros Mountains while moderate level of richness was observed between Zagros and Alborz Mountains. High, moderate and low richness of endemic freshwater fish match with Upper Tigris & Euphrates, Namak, and Kavir & Lut Deserts ecoregions respectively. Kura - South Caspian Drainages and Caspian Highlands were the most similar ecoregions and Orumiyeh was the most unique ecoregion according to endemic fish presence. Precipitation and precipitation change velocity since the Last Glacial Maximum were the most important predictors of endemic freshwater fish richness. Areas identified to have the highest species richness have high priority for the conservation of freshwater fish in Iran, therefore, should be considered in future protected areas development.</p>
Data from: mapping endemic freshwater fish richness to identify high priority areas for conservation: an ecoregion approach
Open the record for dataset details and reuse information.
Data from: Do freshwater ecoregions and continental shelf width predict patterns of historical gene flow in the freshwater fish Poecilia butleri?
We examined historical patterns of gene flow in the freshwater fish Poecilia butleri in western Mexico. We tested the hypothesis that the boundaries between four freshwater ecological communities (ecoregions) might have limited the movement of P. butleri because changes in species compositions might restrict establishment between adjacent ecoregions, even in situations where a physical barrier is absent. Hence, we predicted that boundaries between ecoregions should correspond to phylogeographical breaks in P. butleri. We also tested the hypothesis that the width of the continental shelf affected historical gene flow in P. butleri because a broad continental shelf provides a greater opportunity for rivers to coalesce during historical episodes of low sea levels as opposed to a narrow continental shelf that should restrict the potential for gene flow among adjacent rivers. Hence, we predicted greater amounts of historical gene flow among neighbouring river basins in the region of western Mexico where the continental shelf is wider, whereas, in the region where the continental shelf is narrower, we expected to detect limited levels of historical gene flow. We analyzed mitochondrial DNA sequence data (cytochrome b) taken from 264 individuals of P. butleri collected from 34 locations distributed across four different ecoregions in western Mexico. To examine patterns of phylogenetic diversification and historical gene flow in P. butleri, we employed several analytical approaches, including traditional tree-based phylogenetic analyses (likelihood and parsimony), haplotype network reconstruction, analyses of molecular variance, and spatial analysis of molecular variance. We found genetic breaks coinciding with two out of three different ecoregion boundaries, suggesting limited historical gene flow. In addition to different species compositions between these adjacent ecoregions, geological features such as the Trans-Mexican Volcanic Belt and the mountainous topography in south-western Mexico, likely contributed to these observed genetic breaks. By contrast, no genetic break was evident between two other ecoregions, a result that partially rejects our first hypothesis. Several results were consistent with our second hypothesis. Changes in the width of the continental shelf in western Mexico are associated with the observed patterns of historical gene flow. Our results indicate that the interactions among multiple geological and biological factors affect the spatial patterns of genetic diversity of widespread freshwater species.
FIGURE 15 in Freshwater fishes of the Northeastern Mata Atlântica ecoregion, Brazil: an updated checklist with distributional patterns of a highly endemic ichthyofauna
FIGURE 15. Distribution maps of native freshwater fishes occurring in the Northeastern Mata Atlântica ecoregion. (A) Neoplecostomus espiritosantensis; (B) Neoplecostomus microps; (C) Neoplecostomus pirangaensis; (D) Oligosarcus acutirostris; (E) Oligosarcus argenteus; (F) Oligosarcus macrolepis; (G) Oligosarcus solitarius; (H) Ophthalmolebias bokermanni; (I) Ophthalmolebias ilheusensis; (J) Ophthalmolebias perpendicularis; (K) Ophthalmolebias rosaceus; (L) Ophthalmolebias suzarti; (M) Otothyris lophophanes; (N) Otothyris travassosi; (O) Pachyurus adspersus; (P) Paragenidens grandoculis; (Q) Pareiorhaphis bahiana; (R) Pareiorhaphis lineata; (S) Pareiorhaphis lophia; (T) Pareiorhaphis mucurina.
FIGURE 14 in Freshwater fishes of the Northeastern Mata Atlântica ecoregion, Brazil: an updated checklist with distributional patterns of a highly endemic ichthyofauna
FIGURE 14. Distribution maps of native freshwater fishes occurring in the Northeastern Mata Atlântica ecoregion. (A) Megaleporinus garmani; (B) Megaleporinus reinhardti; (C) Microcambeva draco; (D) Microcambeva jucuensis; (E) Microcambeva mucuriensis; (F) Microcambeva watu; (G) Microglanis minutus; (H) Microglanis parahybae; (I) Microglanis pataxo; (J) Microlepidogaster discus; (K) Microlepidogaster roseae; (L) Mimagoniates microlepis; (M) Mimagoniates sylvicola; (N) Moenkhausia costae; (O) Moenkhausia diamantina; (P) Moenkhausia vittata; (Q) Mucurilebias leitaoi; (R) Nematocharax varii; (S) Nematocharax venustus; (T) Neoplecostomus doceensis.
FIGURE 13 in Freshwater fishes of the Northeastern Mata Atlântica ecoregion, Brazil: an updated checklist with distributional patterns of a highly endemic ichthyofauna
FIGURE 13. Distribution maps of native freshwater fishes occurring in the Northeastern Mata Atlântica ecoregion. (A) Ituglanis cahyensis; (B) Ituglanis paraguassuensis; (C) Ituglanis parahybae; (D) Ituglanis payaya; (E) Kalyptodoras bahiensis; (F) Kolpotocheirodon figueiredoi; (G) Kryptolebias ocellatus; (H) Lepidocharax burnsi; (I) Lepidocharax diamantina; (J) Leporinus bahiensis; (K) Leporinus melanopleura; (L) Leporinus melanopleurodes; (M) Leporinus taeniatus; (N) Lignobrycon myersi; (O) Loricariichthys castaneus; (P) Loricariichthys melanurus; (Q) Megaleporinus brinco; (R) Megaleporinus conirostris; (S) Megaleporinus elongatus; (T) Megaleporinus gaiero.
FIGURE 11 in Freshwater fishes of the Northeastern Mata Atlântica ecoregion, Brazil: an updated checklist with distributional patterns of a highly endemic ichthyofauna
FIGURE 11. Distribution maps of native freshwater fishes occurring in the Northeastern Mata Atlântica ecoregion. (A) Harttia intermontana; (B) Harttia loricariformis; (C) Hasemania piatan; (D) Hemigrammus brevis; (E) Hemigrammus marginatus; (F) Henochilus wheatlandii; (G) Hirtella carinata; (H) Hisonotus thayeri; (I) Hoplerythrinus unitaeniatus; (J) Hoplias brasiliensis; (K) Hoplias intermedius; (L) Hoplias aff. malabaricus; (M) Hoplosternum littorale; (N) Hyphessobrycon bifasciatus; (O) Hyphessobrycon brumado; (P) Hyphessobrycon itaparicensis; (Q) Hyphessobrycon micropterus; (R) Hyphessobrycon negodagua; (S) Hyphessobrycon parvellus; (T) Hyphessobrycon veredus.
FIGURE 12 in Freshwater fishes of the Northeastern Mata Atlântica ecoregion, Brazil: an updated checklist with distributional patterns of a highly endemic ichthyofauna
FIGURE 12. Distribution maps of native freshwater fishes occurring in the Northeastern Mata Atlântica ecoregion. (A) Hyphessobrycon vinaceus; (B) Hypomasticus copelandii; (C) Hypomasticus mormyrops; (D) Hypomasticus santanai; (E) Hypomasticus steindachneri; (F) Hypomasticus thayeri; (G) Hypostomus affinis; (H) Hypostomus auroguttatus; (I) Hypostomus brevicauda; (J) Hypostomus jaguar; (K) Hypostomus leucophaeus; (L) Hypostomus nigrolineatus; (M) Hypostomus scabriceps; (N) Hypostomus unae; (O) Hypostomus wuchereri; (P) Hypsolebias nudiorbitatus; (Q) Hypsolebias ocellatus; (R) Imparfinis borodini; (S) Imparfinis minutus; (T) Ituglanis agreste.
FIGURE 10 in Freshwater fishes of the Northeastern Mata Atlântica ecoregion, Brazil: an updated checklist with distributional patterns of a highly endemic ichthyofauna
FIGURE 10. Distribution maps of native freshwater fishes occurring in the Northeastern Mata Atlântica ecoregion. (A) Eigenmannia sp.; (B) Erythrinus erythrinus; (C) Euryochus thysanos; (D) Geophagus cf. brasiliensis; (E) Geophagus diamantinensis; (F) Geophagus itapicuruensis; (G) Geophagus multiocellus; (H) Geophagus obscurus; (I) Geophagus rufomarginatus; (J) Geophagus santosi; (K) Glanidium botocudo; (L) Glanidium melanopterum; (M) Glaphyropoma rodriguesi; (N) Glaphyropoma spinosum; (O) Gymnotus bahianus; (P) Gymnotus capitimaculatus; (Q) Gymnotus aff. carapo; (R) Gymnotus interruptus; (S) Gymnotus cf. pantherinus; (T) Harttia garavelloi.
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Allen Brain Atlas
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Annotated Behaviour and Observability Dataset (ABODe)
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