Ichthyology

In this subdiscipline: 39 papers

Discipline summary

Branch of zoology devoted to fish.

Popular papers

  1. From headwater to mouth, the physical variables within a river system present a continuous gradient of physical conditions. This gradient should elicit a series of responses within the constituent populations resulting in a continuum of biotic…
  2. Fish conservation in South America is a pressing issue. The biodiversity of fishes, just as with all other groups of plants and animals, is far from fully known. Continuing habitat loss may result in biodiversity losses before full species diversity…
  3. We examine evidence for the structuring of fish communities from stream and lake systems and the roles of biotic, abiotic, and spatial factors in determining the species composition. Piscivory by fish is a dominant factor in both stream and lake…
  4. We examined intraspecific morphological diversification between river channel and lagoon habitats for two Neotro- pical fish (Bryconops caudomaculatus, Characidae; Biotodoma wavrini, Cichlidae). We hypothesized that differences between habitats…
  5. The subfamily Loricariinae belongs to the Neotropical mailed catfish family Loricariidae. Members of Loricariinae are recognized by their long and flattened caudal peduncle and absence of an adipose fin. Despite important studies conducted on this…
  6. High species richness and evenness in structurally complex habitats has been hypothesized to be associated with niche partitioning. To test this idea, relationships between habitat structural complexity in river littoral-zone habitats and…
  7. Freshwater biodiversity is the over-riding conservation priority during the International Decade for Action - 'Water for Life' - 2005 to 2015. Fresh water makes up only 0.01% of the World's water and approximately 0.8% of the Earth's surface, yet…
  8. We present a new map depicting the first global biogeographic regionalization of Earth's freshwater systems. This map of freshwater ecoregions is based on the distributions and compositions of freshwater fish species and incorporates major…
  9. Morphological correlates of diet were examined in 48 species of freshwater fishes from floodplain lakes in the central part of the Mamore´ River (Bolivian Amazon). The species were classified, according to the percentage occurrence of seven food…
  10. This study aimed to test a simplified protocol for feeding fish analysis. For this, the food items found in the gastric contents of six freshwater fish species (Astyanax paranae, Phalloceros caudimaculatus, Loricariichthys platymetopon, Moenkhausia…
  11. Serrasalmus aff. brandtii and Pygocentrus nattereri are two species of piranhas, both common in the Viana Lake, which is formed by the flooding waters of the Pindaré River, a tributary of the left bank of the Mearim River. A sample composed of 249…
  12. The eastern Brazilian coastal drainages are of great biogeographical significance, because of their highly endemic fish faunas. Phylogenetic patterns suggest a close biotic relationship between the rivers that flow into the Atlantic and those on the…
  13. BACKGROUND: Freshwaters are the most threatened ecosystems on earth. Although recent assessments provide data on global priority regions for freshwater conservation, local scale priorities remain unknown. Refining the scale of global biodiversity…
  14. The ecomorphology of 14 fish species resident in a headwater riffles area of the Sao Francisco river, southeastern Brasil, was analyzed and combined with diet and feeding behavior data, previously obtained by us. The three larger species groups…

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