Results 71 to 80 of about 4,281 (217)

Novas ocorrências de metacercária de Austrodiplostomum compactum (Lutz, 1928) (Platyhelminthes: Digenea) parasito de olhos de peixes da Bacia do Rio Paraná New occurrences of metacercariae of Austrodiplostomum compactum (Lutz, 1928) (Platyhelminthes: Digenea) eye flukes of fish from the Paraná Basin

open access: yesRevista Brasileira de Parasitologia Veterinária, 2008
Austrodiplostomum compactum (Platyhelminthes: Digenea) parasita os olhos de várias de espécies de peixes. A presença deste parasito, em casos extremos, pode causar exoftalmia, deslocamento da retina, opacidade do cristalino e cegueira ou até a morte.
Fábio Hideki Yamada   +4 more
doaj   +1 more source

Actinopterygii, Siluriformes, Loricariidae, Loricariichthys platymetopon Isbrücker and Nijssen, 1979: first record in Reservoir of Canoas II, Middle Paranapanema River, border of the states of São Paulo and Paraná, Brazil [PDF]

open access: yesCheck List, 2011
First record of the “cascudo”, Loricariichthys platymetopon Isbrücker and Nijssen, 1979 in Canoas II Reservoir (Middle Paranapanema River, border of the states of São Paulo and Paraná, Brazil).
Ana Souto   +4 more
doaj   +3 more sources

Using causal maps to support ex-post assessment of social impacts of dams [PDF]

open access: yes, 2015
This paper presents the results of an ex-post assessment of two important dams in Brazil. The study follows the principles of Social Impact Management, which offer a suitable framework for analyzing the complex social transformations triggered by ...
Aledo, Antonio   +2 more
core   +2 more sources

Isolated Trees in a Fragmented Tropical Landscape: A View Through the Soil Seed Bank

open access: yesBiotropica, Volume 57, Issue 5, September 2025.
Here, we investigated patterns of plant species diversity, abundance, and composition in the soil seed banks of cattle pastures, under fleshy‐fruited, and nonfleshy‐fruited trees within pastures, and in secondary forest patches at ten study sites in Brazil.
Samantha A. Allbee   +3 more
wiley   +1 more source

Ichthyofauna diet changes in response to urbanization: the case of upper Paranapanema River basin (Brazil) [PDF]

open access: yesUrban Ecosystems, 2018
Alterations in stream environments can alter fish food availability, but there is little research data related to the impacts of urbanization on fish diets in tropical streams. Thus, we sought to compare the diet of ten fish species in urbanized and non-urbanized streams reaches.
Alexandre Peressin   +2 more
openaire   +3 more sources

Biologia e características populacionais de uma espécie rara de Pseudopimelodidae da Bacia do Alto Rio Paraná [PDF]

open access: yes, 2010
Streams contain an expressive fraction of the South American fish diversity, mostly composed of small-sized, endemic, and rare species. Populational, reproductive, and diet aspects of Microglanis garavelloi were studied, aiming to make a wide ...
ARCIFA, Marlene Sofia   +1 more
core   +1 more source

Rising and Spreading: First record and ecological aspects of Platanichthys platana (Regan, 1917) in a major tributary of the Upper Paraná River, Brazil

open access: yesActa Scientiarum: Biological Sciences
This study presents the first record of the sardine Platanichthys platana (Regan, 1917) in the Paranapanema River basin and provides insights into the species' ecological traits.
João Daniel Ferraz   +5 more
doaj   +1 more source

Genetic monitoring by rapd markers for repopulation programs of Salminus brasiliensis (Pisces, Characiformes) - doi: 10.4025/actascianimsci.v35i2.15904

open access: yesActa Scientiarum: Animal Sciences, 2012
The preservation of the genetic variability of hatchery stocks used to supplement natural populations is a priority. Current study employed RAPD markers to examine the genetic diversity of dourado samples from the middle Paranapanema river and from the ...
Fernanda Simões de Almeida   +4 more
doaj   +1 more source

The expansion of Araucaria forest in the southern Brazilian highlands during the last 4000 years and its implications for the development of the Taquara/Itararé Tradition [PDF]

open access: yes, 2013
Reproduced with permission of the publisher. Copyright © Maney Publishing 2007.An examination of the late Holocene environmental and cultural sequences of the southern Brazilian highlands indicates that the colonisation of this region by the Taquara ...
Behling, Hermann, Iriarte, José
core   +1 more source

Longitudinal distribution of Copepoda populations in the transition zone of Paranapanema river and Jurumirim Reservoir (São Paulo, Brazil) and interchange with two lateral lakes

open access: yesBrazilian Journal of Biology
Longitudinal changes in composition, abundance, and distribution of copepods were studied at the transition zone of Paranapanema River-Jurumirim Reservoir (SP, Brazil).
S. M. C. Casanova, R. Henry
doaj   +1 more source

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