Results 41 to 50 of about 709 (151)

Reproduction and Feeding of the Electric Fish Brachyhypopomus gauderio (Gymnotiformes: Hypopomidae) and the Discussion of a Life History Pattern for Gymnotiforms from High Latitudes

PLoS ONE, 2014
The reproductive biology and feeding habits of the electric fish Brachyhypopomus gauderio were studied. The species has seasonal reproductive behavior, with breeding occurring during the Southern Hemisphere spring and summer, and having a positive relation with the photoperiod variation.
Julia Giora, Hellen M Tarasconi, Clarice B Fialho   +2 more
openaire   +4 more sources

Submicrosecond pacemaker precision is behaviorally modulated: The gymnotiform electromotor pathway [PDF]

Proceedings of the National Academy of Sciences, 1998
What are the limits and modulators of neural precision? We address this question in the most regular biological oscillator known, the electric organ command nucleus in the brainstem of wave-type gymnotiform fish. These fish produce an oscillating electric field, the electric organ discharge (EOD), used in electrolocation and communication.
K T, Moortgat, C H, Keller, T H, Bullock, T J, Sejnowski   +3 more
openaire   +2 more sources

Reproductive biology of a population of Gymnotus aff.carapo (Teleostei: Gymnotidae) from southern Brazil

Neotropical Ichthyology
The reproductive period and its relation with somatic and abiotic factors, the relative and absolute fecundity, spawning type, length of first maturation and sex ratio is describe for Gymnotus aff.carapo from a small lake at Itapuã State Park, Rio Grande
Diego de Paula Cognato, Clarice Bernhardt Fialho   +1 more
doaj   +1 more source

Assessment of fish assemblage in an urban system, Itapecerica River, upper São Francisco River basin, Divinópolis, Minas Gerais, Brazil [PDF]

Check List, 2013
Despite the economic and ecological importance of the Itapecerica River, there is no information about the local fish fauna. The aim of the present study was to provide a list of fish species in Itapecerica River, a tributary of the upper São Francisco ...
Fabrício Domingos, Ralph Thomé, Rosy Ribeiro, Helena Souza, Hélio Santos   +4 more
doaj   +3 more sources

Species diversity and geographic distribution of Gymnotus (Pisces: Gymnotiformes) by nuclear (GGAC)n microsatellite analysis

Genetics and Molecular Biology, 2000
Patterns of amplified DNA fragments flanked by (GGAC)n microsatellites, obtained by single primer amplification reaction (SPAR), from 198 Gymnotus specimens (Pisces: Gymnotiformes) sampled from 8 southeastern Brazilian river basins were analyzed.
F.M.C. Fernandes-Matioli, S.R. Matioli, L.F. Almeida-Toledo   +2 more
doaj   +1 more source

Comunicación eléctrica en peces sudamericanos

Iatreia, 2005
Los Gymnotiformes, peces eléctricos americanos de descarga débil, poseen un refinado ";Sentido Electrosensorial Activo"; que les permite explorar su medio ambiente y comunicarse.
Ana Silva, Oscar Macadar
doaj  

Design and construction of an Electric Fish Finder

Neotropical Ichthyology
We provide notes on the design and construction of an Electric Fish Finder - a portable differential amplifier for detecting the electrostatic fields of gymnotiform knifefishes.
William G. R. Crampton, Jonathan K. Wells, Charles Smyth, Steven A. Walz   +3 more
doaj   +1 more source

Predation and Crypsis in the Evolution of Electric Signaling in Weakly Electric Fishes

Frontiers in Ecology and Evolution, 2019
Eavesdropping by electroreceptive predators poses a conflict for weakly electric fish, which depend on their Electric Organ Discharge (EOD) signals both for navigation and communication in the dark.
Philip K. Stoddard, Alex Tran, Rüdiger Krahe, Rüdiger Krahe   +3 more
doaj   +1 more source

Electric eels galore: microsatellite markers for population studies [PDF]

Neotropical Ichthyology
Fourteen novel microsatellite loci are described and characterized in two species of electric eels, Electrophorus variiand E. voltaifrom floodplains and rivers of the Amazon rainforest.
Lenice Souza-Shibatta, Dhiego G. Ferreira, Kátia F. Santos, Bruno A. Galindo, Oscar A. Shibatta, Silvia H. Sofia, Renata M. Giacomin, Douglas A. Bastos, Raimundo N. G. Mendes-Júnior, Carlos David de Santana   +9 more
doaj   +2 more sources

Mitochondrial genomes of the South American electric knifefishes (Order Gymnotiformes)

Mitochondrial DNA Part B, 2016
Three complete mitochondrial genomes of South American electric fishes (Gymnotiformes), derived from high-throughput RNA sequencing (RNA-Seq), are reported herein. We report the complete mitochondrial genome of the bluntnose knifefish Brachyhypopomus n.sp. VERD, determined from newly sequenced data.
Elbassiouny, Ahmed A., Schott, Ryan K., Waddell, Joseph C., Kolmann, Matthew A., Lehmberg, Emma S., Van Nynatten, Alexander, Crampton, William G. R., Chang, Belinda S. W., Lovejoy, Nathan R.   +8 more
openaire   +3 more sources