Results 71 to 80 of about 7,231 (200)

Unusual importance of insectivory in the diet of the Neotropical otter, Lontra annectens (Major, 1897) (Mammalia, Carnivora) [PDF]

Neotropical Biology and Conservation
The Neotropical otter, Lontra annectens, is a predator specialized in aquatic prey, and the main diet of this otter is fish, supplemented mainly by crustaceans and opportunistically by mollusks, insects, and vertebrates such as mammals, amphibians, birds,
Luis Ángel Pozos-López, Noé González-Ruiz, José Ramírez-Pulido   +2 more
doaj   +3 more sources

Water temperature affects aggressive interactions in a Neotropical cichlid fish

, 2018
Changes in water temperature may affect the aggressive behavior of aquatic organisms, such as fish, either by changing some physiological mechanisms or by increasing the probability of encounters between individuals as a result of variation in their ...
Colognesi, Gisele, Costa-Ferreira, Roselene S., Gisele Colognesi, Costa-Ferreira, Roselene S. [UNESP], Colognesi, Gisele [UNESP], Thaís B. Carvalho, Carvalho, Thaís B., Bolognesi, Marcela C. [UNESP], Gonçalves-de-Freitas, Eliane, Brandão, Manuela L. [UNESP], Bolognesi, Marcela C., Eliane Gonçalves-de-Freitas, Roselene S. Costa-Ferreira, Brandão, Manuela L., Gonçalves-de-Freitas, Eliane [UNESP], Manuela L. Brandão, Marcela C. Bolognesi   +16 more
core   +1 more source

A new species of Gymnotus (Gymnotiformes: Gymnotidae) from the Fitzcarrald Arch of southeastern Peru

Neotropical Ichthyology
Herein Gymnotus chaviro is described from the Alto Yuruá (upper rio Juruá) of southeastern Peru, where it is locally abundant in terra firme streams and floodplain oxbow lakes, and occurs sympatrically and syntopically with the type species of the genus ...
Emmanuel L. Maxime, James S. Albert
doaj   +1 more source

Influence of forest cover and mesohabitat types on functional and taxonomic diversity of fish communities in Neotropical lowland streams

, 2012
In this study, we investigated how taxonomic and functional diversity of fish communities is influenced by forest cover and mesohabitat types in Neotropical lowland streams.
Teresa, Fabricio B., Casatti, Lilian [UNESP], Casatti, Lilian   +2 more
core   +1 more source

The influence of increased water temperature on the duration of spermatogenesis in a neotropical fish, Astyanax altiparanae (Characiformes, Characidae)

, 2020
In view of the established climate change scenario and the consequent changes in global temperature, it is essential to study its effects on animal spermatogenesis.
Nóbrega, Rafael Henrique [UNESP], Postingel Quirino, Patricia [UNESP], da Silva Rodrigues, Maira [UNESP], Veríssimo-Silveira, Rosicleire [UNESP], Mori, Ricardo Hideo [UNESP], Ninhaus-Silveira, Alexandre [UNESP], da Silva Cabral, Elis Marina [UNESP], de Siqueira-Silva, Diógenes Henrique, Butzge, Arno Juliano [UNESP]   +8 more
core   +1 more source

Can DNA barcoding accurately discriminate megadiverse Neotropical freshwater fish fauna? [PDF]

, 2013
Background: The megadiverse Neotropical freshwater ichthyofauna is the richest in the world with approximately 6,000 recognized species. Interestingly, they are distributed among only 17 orders, and almost 80% of them belong to only three orders ...
Robert Hanner, Luiz HG Pereira, Fausto Foresti, Pereira, Luiz H.G., Oliveira, Claudio, Hanner, Robert, Claudio Oliveira, Foresti, Fausto   +7 more
core   +1 more source

Fish functional trophic groups in headwater karst streams from the Upper Paraguay River basin

, 2023
Data obtained by direct observation of organisms in their natural habitats can provide valuable contributions regarding intra-and inter-specific interactions, as well as spatial distribution and trophic relationships.
Brejão, Gabriel L., Casatti, Lilian [UNESP], Severo-Neto, Francisco   +2 more
core   +1 more source

Selectivity of fish ladders: a bottleneck in Neotropical fish movement

Neotropical Ichthyology
Although dozens of fish ladders have been constructed at dams of Brazilian reservoirs, there are few studies evaluating their efficiency as a tool for the conservation of Neotropical ichthyofauna, especially for migratory species.
Carlos Sérgio Agostinho, Angelo Antônio Agostinho, Fernando Pelicice, Deusimar Augusto de Almeida, Elineide Eugênio Marques   +4 more
doaj   +1 more source

Water temperature, body mass and fasting heat production of pacu (Piaractus mesopotamicus)

Anais da Academia Brasileira de Ciências
Knowledge on fasting heat production (HEf) of fish is key to develop bioenergetics models thus improving feeding management of farmed species. The core of knowledge on HEf of farmed, neotropical fish is scarce. This study assessed the effect of body mass
FREDY A.A. AGUILAR, THALINE M.P. DA CRUZ, GERSON B. MOURÃO, JOSÉ EURICO P. CYRINO   +3 more
doaj   +1 more source

The complete mitochondrial genome sequences of five Otophysi species (Vertebrata, Teleostei)

Mitochondrial DNA. Part B. Resources, 2019
Complete mitochondrial genomes of the characiform fishes Astyanax fasciatus, Astyanax altiparanae, Hoplias malabaricus (Karyomorph A) and the Gymnotiformes species Gymnotus sylvius and Gymnotus cuia were characterized in the present study.
Rodrigo Milan Calegari, Pedro Henrique Mira Rodrigues, Rodrigo Zeni dos Santos, Fausto Foresti, Ricardo Utsunomia, Fábio Porto-Foresti   +5 more
doaj   +1 more source