Results 111 to 120 of about 18,147 (299)

Comparative morphology of gill glands in externally fertilizing and inseminating species of cheirodontine fishes, with implications on the phylogeny of the family Characidae (Actinopterygii: Characiformes)

open access: yesNeotropical Ichthyology, 2012
The structure and form of gill gland among inseminating and externally fertilizing species of the Cheirodontinae are described under light microscopy, scanning electron microscopy, and transmission electron microscopy, and compared to other members of ...
Cristina L. C. de Oliveira   +2 more
doaj  

Genetic variation in plasma transferrins of tambaqui, Colossoma macropomum (CUVIER 1818)

open access: yes, 1985
Blood specimens of tambaqui, Colossoma macropomum, an Amazonian fish of commercial importance, were examined for transferrin variants by treating blood plasma specimens with rivanol before electrophoretic analyses in starch gel media.
Jamieso, A., Teixeira, A.
core  

Changes in trophic characteristics of two fish species of Astyanax (Teleostei: Characidae) in response to aquatic pollution

open access: yesZoologia (Curitiba), 2019
The trophic plasticity of most fish species of Astyanax Baird & Girard, 1854 in response to environmental changes and resource availability is high.
M. B. Alonso   +4 more
semanticscholar   +1 more source

Astyanax pampa (Characiformes, Characidae), a

open access: yesRevue suisse de zoologie, 2005
(Uploaded by Plazi from the Biodiversity Heritage Library) No abstract provided.
Jorge R. Casciotta   +2 more
openaire   +3 more sources

Trophic plasticity of omnivorous fishes in natural and human‐dominated landscapes

open access: yesLimnology and Oceanography, Volume 69, Issue 1, Page 189-202, January 2024.
Abstract The persistence of diverse communities and functioning ecosystems under increasing anthropogenic pressure relies on food web rewiring and the ability of animals to expand or change their diet in disturbed ecosystems. We combined a suite of diet tracing techniques to study trophic plasticity in omnivorous fishes, ecomorphologically similar ...
Mayara Pereira Neves   +4 more
wiley   +1 more source

Reproductive biology of Hyphessobrycon eques (Characiformes: Characidae) in Southern Pantanal, Brazil.

open access: yesBrazilian journal of biology = Revista brasleira de biologia, 2019
Population and reproductive aspects allow the knowledge and understanding of population dynamics and the influence of environmental factors, in addition to ensure the success of a species continuity.
C. A. Santana, K. K. Tondato, Y. Súarez
semanticscholar   +1 more source

Two new species of Creptotrema (Digenea: Allocreadiidae) from South America Dos especies nuevas de Creptotrema (Digenea: Allocreadiidae) de América del Sur

open access: yesRevista Mexicana de Biodiversidad, 2008
Two new digenean species belonging in Creptotrema Travassos, Artigas and Pereira, 1928 are described from specimens stored in the invertebrate collection at the Museum of Natural History, Geneva, Switzerland. Creptotrema lamothei n. sp. is described from
Stephen S. Curran
doaj  

Occurrence of Astyanax dissensus Lucena & Thofehrn, 2013 (Teleostei: Characidae) in Argentina [PDF]

open access: yes, 2016
The occurrence of Astyanax dissensus in the Uruguay River, at Yapeyú, Corrientes, Argentina is reported for the first time in the country.Fil: Teran, Guillermo Enrique. Consejo Nacional de Investigaciones Científicas y Técnicas.
Alonso, Felipe   +4 more
core   +2 more sources

Food resource partitioning among species of Astyanax (Characiformes: Characidae) in the Lower Iguaçu River and tributaries, Brazil

open access: yesNeotropical Ichthyology, 2019
Resource partitioning allows for interspecific coexistence and is frequently reported for similar species. Here, we predicted the existence of resource partitioning among species of Astyanax that co-occur in the Low Iguaçu River and tributaries in Brazil.
S. F. R. Pini   +5 more
semanticscholar   +1 more source

La mojarra desnuda o bronceada [PDF]

open access: yes, 2011
Fil: Miquelarena, Amalia María. División Zoología Vertebrados. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Nadalin, Diego Oscar. División Zoología Vertebrados.
López, Hugo Luis   +2 more
core  

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