Results 71 to 80 of about 3,790 (211)

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

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

Optimising daily sampling of plant–bee interaction networks

Journal of Animal Ecology, EarlyView.
Daily variation in ecological interaction networks is rarely quantified due to limited temporal sampling, yet network structure may change substantially within a single day. We show that plant–bee networks exhibit strong intraday shifts in composition and structure, and that sampling distributed across key daily periods better captures network ...
Caio S. Ballarin, Jorge Isla, Blanca Arroyo‐Correa, Elena Quintero, Leandro Hachuy‐Filho, Felipe W. Amorim, Pedro Jordano   +6 more
wiley   +1 more source

Upstream and downstream migration speed of Prochilodus costatus (Characiformes: Prochilodontidae) in upper São Francisco basin, Brazil

Neotropical Ichthyology
Details of migration dynamics of Neotropical fishes are poorly understood. This study aimed to examine upstream (spawning) and downstream (post-spawning) migration speeds, of curimatá-pioa (Prochilodus costatus) in the São Francisco River basin ...
João de Magalhães Lopes, Carlos Bernardo Mascarenhas Alves, Alexandre Peressin, Paulo Santos Pompeu   +3 more
doaj   +1 more source

Bat community assembly in the ecotone of two neotropical biodiversity hotspots is determined by environmental filtering rather than historical factors

Journal of Animal Ecology, EarlyView.
We demonstrate that environmental filtering is the primary mechanism shaping bat communities across the Cerrado–Atlantic Forest ecotone. By integrating phylogenetic diversity, environmental gradients, and coevolutionary assembly models, our study provides new insights into the processes maintaining biodiversity in a globally important transition zone ...
Daiana Cardoso Silva, Hernani F. M. Oliveira, Fabricius M. C. B. Domingos   +2 more
wiley   +1 more source

Nuclear DNA content of thirty species of Neotropical fishes

Genetics and Molecular Biology, 1998
The present paper reports nuclear DNA content in 30 Neotropical freshwater fish species and summarizes the data on other Neotropical species presented in the literature. Among Neotropical fishes, the nuclear DNA content ranges from 1.04 ± 0.09 pg/nucleus in Corydoras cf. simulatus (2n = 62) to 248.0 pg/nucleus in Lepidosiren paradoxa (2n = 38).
Carvalho, Margarida Lima, Oliveira, Claudio, Foresti, Fausto   +2 more
openaire   +6 more sources

The Evolution of Male Weapons Is Associated with the Type of Breeding Site in a Clade of Neotropical Frogs

Integrative Zoology, EarlyView.
Male weaponry evolution is often linked to male–male competition, but its relationship with breeding site type remains unclear. Using Leptodactylinae frogs, we found a macroevolutionary correlation between breeding site type and weapon evolution. Also, gains and losses of weapons occurred more frequently in exposed‐breeding sites, an unexpected finding.
Erika M. Santana, Daniel S. Caetano, Alexandre V. Palaoro, Glauco Machado   +3 more
wiley   +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

Changes in fish assemblages caused by different Neotropical biomes.

Latin American Journal of Aquatic Research, 2018
ABSTRACT We studied the leading causes of the spatial distribution pattern of fish species assemblage in the transition region between Cerrado-Caatinga biomes, in the São Francisco River (Brazil). Biotic and abiotic variables were collected at 17 sampling sites located in three sub-basins, in two periods during 2015.
Rodrigues, Leydiane, Carmassi, Alberto, Perbiche-Neves, Gilmar, Sarmento-Soares, Luisa María   +3 more
openaire   +2 more sources