Results 11 to 20 of about 346,330 (296)

Spatial variability in the growth of invasive European barbel Barbus barbus in the River Severn basin, revealed using anglers as citizen scientists [PDF]

open access: yesKnowledge and Management of Aquatic Ecosystems, 2017
Life history trait analyses of non-native fishes help identify how novel populations respond to different habitat typologies. Here, using electric fishing and anglers as citizen scientists, scales were collected from the invasive barbel Barbus barbus ...
Trigo Fatima Amat   +2 more
doaj   +2 more sources

Comparative Bioaccumulation of PAH and BTEX in Malapterurus electricus (Siluriformes: Malapteruridae) and its Enteric Parasite, Electrotaenia malopteruri Sampled from Lekki Lagoon, Lagos, Nigeria [PDF]

open access: yesBrazilian Journal of Biology, 2020
Contamination of Lekki lagoon by petrogenic chemicals such as polycyclic aromatic hydrocarbons (PAH) and benzene, toluene, ethylbenzene, and xylene (BTEX) has been widely reported.
P. O. Isibor   +8 more
doaj   +1 more source

Sexual dimorphism in the electric knifefish, Gymnorhamphichthys rondoni (Rhamphichthyidae: Gymnotiformes) [PDF]

open access: yesActa Amazonica, 2019
Sexual dimorfism refers to morphological differences between males and females of a species. It may be a result of different selection pressures acting on either or both sexes and may occur in any sexually-reproducing dioecious species, including fishes.
Elisa Queiroz GARCIA, Jansen ZUANON
doaj   +1 more source

Theoretical analysis of pre-receptor image conditioning in weakly electric fish. [PDF]

open access: yesPLoS Computational Biology, 2005
Electroreceptive fish detect nearby objects by processing the information contained in the pattern of electric currents through the skin. The distribution of local transepidermal voltage or current density on the sensory surface of the fish's skin is the
Adriana Migliaro   +2 more
doaj   +2 more sources

Electric imaging through evolution, a modeling study of commonalities and differences. [PDF]

open access: yesPLoS Computational Biology, 2014
Modeling the electric field and images in electric fish contributes to a better understanding of the pre-receptor conditioning of electric images. Although the boundary element method has been very successful for calculating images and fields, complex ...
Federico Pedraja   +3 more
doaj   +1 more source

Generalization of learned responses in the mormyrid electrosensory lobe

open access: yeseLife, 2019
Appropriate generalization of learned responses to new situations is vital for adaptive behavior. We provide a circuit-level account of generalization in the electrosensory lobe (ELL) of weakly electric mormyrid fish. Much is already known in this system
Conor Dempsey   +2 more
doaj   +1 more source

Learning to generalize

open access: yeseLife, 2019
Electric fish are able to take what they have learnt about sensory processing in certain situations and apply it in other situations.
André Longtin
doaj   +1 more source

Automatic realistic real time stimulation/recording in weakly electric fish: long time behavior characterization in freely swimming fish and stimuli discrimination. [PDF]

open access: yesPLoS ONE, 2014
Weakly electric fish are unique model systems in neuroethology, that allow experimentalists to non-invasively, access, central nervous system generated spatio-temporal electric patterns of pulses with roles in at least 2 complex and incompletely ...
Caroline G Forlim, Reynaldo D Pinto
doaj   +1 more source

Status-Dependent Vasotocin Modulation of Dominance and Subordination in the Weakly Electric Fish Gymnotus omarorum

open access: yesFrontiers in Behavioral Neuroscience, 2018
Dominant-subordinate status emerges from agonistic encounters. The weakly electric fish, Gymnotus omarorum, displays a clear-cut example of non-breeding territorial aggression.
Rossana Perrone   +2 more
doaj   +1 more source

Effect of voltage gradient in an electrical field on threshold indices of fish response [PDF]

open access: yesActa Ichthyologica et Piscatoria, 1991
The work presents experimental methods and effect of an electric field of alternating current potential changes on threshold values of some fish species from the Volga delta response.
E.T. Prel
doaj   +3 more sources

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