Results 51 to 60 of about 709 (151)

Reproductive biology of weakly electric fish Eigenmannia trilineata López and Castello, 1966 (Teleostei, Sternopygidae)

Brazilian Archives of Biology and Technology, 2009
This study described the reproductive biology of a population of the weakly electric fish Eigenmannia trilineata from southern Brazil, providing the information on the estimation of reproductive period, fecundity, spawning type, first maturation size ...
Júlia Giora, Clarice Bernhardt Fialho
doaj   +1 more source

Phylogenetic revision of Gymnotidae (Teleostei: Gymnotiformes), with descriptions of six subgenera

PLOS ONE, 2019
The diversity of gymnotid electric fishes has been intensely studied over the past 25 years, with 35 species named since 1994, compared to 11 species in the previous 236 years. Substantial effort has also been applied in recent years to documenting gymnotid interrelationships, with seven systematic studies published using morphological and molecular ...
Jack M. Craig, Lesley Y. Kim, Victor A. Tagliacollo, James S. Albert   +3 more
openaire   +4 more sources

Feeding habit of Eigenmannia trilineata Lopez & Castello, 1966 (Teleostei: Sternopygidae) of Parque Estadual de Itapuã, RS, Brazil

Neotropical Ichthyology
This study aims to describe the feeding habits of a population of the weakly electric fish Eigenmannia trilineata from Southern Brazil through the monthly frequency variation of replection (RI) and hepatosomatic (HSI) indexes, condition factor (CF) and ...
Júlia Giora, Clarice B. Fialho, Ana Paula S. Dufech   +2 more
doaj   +1 more source

Comparing lacustrine environments: the importance of the kind of habitat on the structure of fishes

Acta Limnologica Brasiliensia, 2018
Aim Fish diversity in two lentic environments: a lake connected (Barbosa lake) to a river and an artificial reservoir (Ninfeias reservoir) were determined in the dry and rainy periods in 2015. We expected to find more diversity in the connected lake and
Reinaldo José de Castro, Raoul Henry, Carla Ferragut, Mayara Casartelli   +3 more
doaj   +1 more source

The brain of Brycon orbignyanus (Valenciennes, 1850) (Teleostei: Characiformes: Bryconidae): gross morphology and phylogenetic considerations

Neotropical Ichthyology
The brain of Brycon orbignyanus is described as a model for future studies of the gross morphology of the central nervous system in Characiformes. The study of brain gross morphology of 48 distinct taxa of Characiformes, one of Cypriniformes, two of ...
Thiago N. A. Pereira, Ricardo M. C. Castro   +1 more
doaj   +1 more source

Fish associated with aquatic macrophytes in the Chacororé-Sinhá Mariana Lake system and Mutum River, Pantanal of Mato Grosso, Brazil Peixes associados a macrófitas aquáticas no sistema de baías Chacororé-Sinhá Mariana e rio Mutum, Pantanal - MT

Brazilian Journal of Biology, 2009
On the left bank of the Cuibá River, one of the main tributaries of the Pantanal in Mato Grosso, are located the Chacororé and Sinhá Mariana Lakes and the Mutum River, the littoral regions of which are covered with aquatic macrophytes, dominated by the ...
EB. Pacheco, CJ. Da-Silva
doaj   +1 more source

A phylogenomic approach to reconstruct interrelationships of main clupeocephalan lineages with a critical discussion of morphological apomorphies

BMC Evolutionary Biology, 2018
Background Previous molecular studies on the phylogeny and classification of clupeocephalan fishes revealed numerous new taxonomic entities. For re-analysing these taxa, we perform target gene capturing and subsequent next generation sequencing of ...
Nicolas Straube, Chenhong Li, Matthias Mertzen, Hao Yuan, Timo Moritz   +4 more
doaj   +1 more source

Sperm ultrastructure in three different families of weakly electric fishes (Teleostei: Gymnotiformes)

Neotropical Ichthyology
This study presents details of sperm ultrastructure for Gymnotus aff. carapo (Gymnotidae), Eigenmannia trilineata (Sternopygidae), and three Brachyhypopomus species (B. draco, B. bombilla, and B. gauderio - Hypopomidae) from southern Brazil.
Júlia Giora, John R. Burns
doaj   +1 more source

Profile of micronucleus frequencies and nuclear abnormalities in different species of electric fishes (Gymnotiformes) from the Eastern Amazon

Genetics and Molecular Biology, 2013
The frequency of spontaneous micronucleus (MN) formation in fish species needs to be determined to evaluate their usefulness for genotoxic biomonitoring.
Karina Motta Melo, Ingrid Reale Alves, Julio Cesar Pieczarka, José Augusto de Oliveira David, Cleusa Yoshiko Nagamachi, Cesar Koppe Grisolia   +5 more
doaj  

The diversity and evolution of electric organs in Neotropical knifefishes. [PDF]

Evodevo, 2022
Bray IE, Alshami IJJ, Kudoh T.
europepmc   +1 more source