Results 41 to 50 of about 14,329 (219)

Anthropogenic Factors Drive the Depletion of Fish Functional Β Diversity Within and Outside Two National Reserves in the Peruvian Amazon

Aquatic Conservation: Marine and Freshwater Ecosystems, Volume 35, Issue 12, December 2025.
ABSTRACT Understanding the impact of human activities on fish communities is critical for the effective conservation of Amazonian ecosystems. In this study, we sampled environmental DNA (eDNA) from 17 sites (lakes and rivers) in two Peruvian national reserves, Pacaya‐Samiria and Allpahuayo‐Mishana, using a metabarcoding approach with four genetic ...
B. Prat, C. Mariac, J.‐F. Renno, C. García‐Dávila, C. Angulo, G. Estivals, F. Duponchelle   +6 more
wiley   +1 more source

Catálogo de ejemplares tipo de la colección ictiológica del Museo de La Plata. Adenda 2015 [PDF]

, 2015
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.
Miquelarena, Amalia María, Nadalin, Diego Oscar   +1 more
core  

Small fish, large variation: Morphological diversity of Weberian apparatus in Noturus catfishes and ecological implications

The Anatomical Record, Volume 308, Issue 12, Page 3069-3081, December 2025.
Abstract The Weberian apparatus is a hearing specialization unique to the otophysan fishes, and an unexpected degree of morphological variation exists in species of the Noturus catfishes. Our aim in this study is to investigate relationships between morphological variations and ecology that may drive this variation.
J. C. Hoeflich, Juan Liu
wiley   +1 more source

The Ecological Memory of Fish Assemblages in Tropical Agroecosystems With Different History of Landscape Changes

Freshwater Biology, Volume 70, Issue 12, December 2025.
ABSTRACT Environmental changes can have persistent effects on the local and regional dynamics of multispecies assemblages. However, the extent of historical legacies on current diversity patterns may depend on the trajectory and intensity of the environmental change. Here, we investigate how persistent decadal land use and land cover (LULC) changes are
Jaquelini O. Zeni, Gabriel L. Brejão, Lilian Casatti, Tadeu Siqueira   +3 more
wiley   +1 more source

Structure et minéralisation des écailles de quelques Characiformes de Guyane (Osteichthyes, Teleostei) [PDF]

, 1994
Les écailles de cinq espèces de Characiformes (#Leporinus friderici$, #Anastomidae$ ; #Triportheus rotundatus$, #Characidae$ ; #Curimata cyprinoides$, #Curimatidae$ ; #Hoplias aimara$, #Erythrinidae$ ; #Myleus romboidalis$, #Serrasalmidae$) ont été ...
Meunier, F.J.
core  

Trends in chromosome evolution of neotropical characiform fishes [PDF]

Caryologia, 1994
SUMMARYNeotropical characiform fishes present two main trends of chromosomal evolution: some taxa show a heterogeneous pattern, with an extensive numerical and structural variation while others show a more homogeneous one, with a clear stability in their karyotype macrostructure.
P.M. Galetti, L.A.C. Bertollo, O. Moreira-Filho   +2 more
openaire   +1 more source

A checklist of chromosome numbers and karyotypes of Amazonian freshwater fishes [PDF]

, 1992
Une liste des nombres de chromosomes de 211 espèces de poisson du bassin amazonien est présentée. Ces espèces, appartenant à 5 ordres, sont caractérisées par une grande variabilité du nombre de chromosomes (2n = 22 à 2n = 134), par la présence de ...
Falcao, J., Feldberg, E., Nakayama, C.M., Porto, J.I.R.   +3 more
core  

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

, 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, Calviño, Pablo, Garcia, Ignacio Daniel, Mirande, Juan Marcos, Teran, Guillermo Enrique   +4 more
core   +2 more sources

Invasive giant river prawns as opportunistic, generalist predators in the Amazon Delta: Insights from metabarcoding

Ecosphere, Volume 16, Issue 11, November 2025.
Abstract Invasive species alter habitats and biological communities. The giant river prawn Macrobrachium rosenbergii (de Man 1879) was introduced to Brazil for aquaculture, and invasive populations have established in the Amazon Delta region where they are believed to pose a risk to the native aquatic fauna.
Aisha Carolina Cei, Dalila Costa Silva, Alan Erik Souza Rodrigues, Silvana Melo Sviggum, Fabricio dos Anjos Santa Rosa, Rasna Figueiredo Martins, João Bráullio de Luna Sales, Jarl Andreas Anmarkrud, Hugo de Boer, Guilherme Correa Oliveira, Quentin Mauvisseau, Jussara Moretto Martinelli‐Lemos, Jonathan Stuart Ready   +12 more
wiley   +1 more source

Local Environmental Variables Predict Fish Species Richness and Composition in Sand Beaches of a Neotropical River

River Research and Applications, Volume 41, Issue 9, Page 1949-1958, November 2025.
ABSTRACT Local and regional species diversity is influenced by historical factors, resource availability, biotic interactions, the presence of resources, and adequate environmental conditions. We evaluated the effects of local environmental variables and spatial structure on fish species richness and composition along sandy beaches of a Neotropical ...
Ronaldo Souza da Silva, Jean Carlo Gonçalves Ortega, Lucas Pires de Oliveira, Vinicius Guerra, Werther Pereira Ramalho, Fabiano Corrêa, Mariana Costa Fratari, Lisandro Juno Soares Vieira, Luciano Fogaça Assis de Montag   +8 more
wiley   +1 more source