Results 41 to 50 of about 2,506,819 (375)

Dimorfismo sexual em Siluriformes e Gymnotiformes (Ostariophysi) da Amazônia Sexual dimorfism in Amazonian Siluriformes and Gymnotiformes (Ostariophysi)

open access: yesActa Amazonica, 2005
No presente trabalho é feito um levantamento dos casos de dimorfismo sexual em Siluriformes e Gymnotiformes. Este levantamento se restringe às formas Neotropicais, com ênfase mais especificamente, às da Amazônia.
Lúcia H. Rapp Py-Daniel   +1 more
doaj   +1 more source

Studied on Detection Methods and Changes of Polycyclic Aromatic Hydrocarbons in Instant Roasted Fish with Different Processes

open access: yesShipin gongye ke-ji, 2022
Objective: In order to establish the detection method for 16 kinds of polycyclic aromatic hydrocarbons (PAHs) in instant roasted fish, the effects of different cooking methods on the types and contents of PAHs in roast fish were analyzed.
Yan ZHANG   +5 more
doaj   +1 more source

Tracking activity patterns of a multispecies community of gymnotiform weakly electric fish in their neotropical habitat without tagging

open access: yesJournal of Experimental Biology, 2019
Field studies on freely behaving animals commonly require tagging and often are focused on single species. Weakly electric fish generate a species- and individual-specific electric organ discharge (EOD) and therefore provide a unique opportunity for ...
Jörg Henninger   +3 more
semanticscholar   +1 more source

Evidence for mutual allocation of social attention through interactive signaling in a mormyrid weakly electric fish

open access: yesProceedings of the National Academy of Sciences of the United States of America, 2018
Significance Interactive electric signaling between mormyrid weakly electric fish by means of echoing a conspecific’s signals has been discussed both in the context of jamming avoidance during active electrolocation and as a strategy for ...
Martin Worm   +5 more
semanticscholar   +1 more source

A JAR of Chirps: The Gymnotiform Chirp Can Function as Both a Communication Signal and a Jamming Avoidance Response

open access: yesFrontiers in Integrative Neuroscience, 2019
The weakly electric gymnotiform fish produce a rhythmic electric organ discharge (EOD) used for communication and active electrolocation. The EOD frequency is entrained to a medullary pacemaker nucleus. During communication and exploration, this rate can
Caitlin E. Field   +4 more
doaj   +1 more source

Tension changes in body of bream Abramis brama (L.) in homogenous electric field in relation to flow direction of direct current and to total length of fish [PDF]

open access: yesActa Ichthyologica et Piscatoria, 1972
Body tension of bream Abramis brama (L.) in homogenous electric field of DC current in relation to direction of current flow and to fish length had been investigated under aquarium conditions.
R. Węgrzynowicz   +2 more
doaj   +3 more sources

Quantifying imperfect detection in an invasive pest fish and the implications for conservation management [PDF]

open access: yes, 2011
In managing non-native species, surveillance programmes aim to minimise the opportunity for invasions to develop from initial introductions through early detection.
Beyer   +33 more
core   +1 more source

Rapid evolution of a voltage-gated sodium channel gene in a lineage of electric fish leads to a persistent sodium current

open access: yesPLoS Biology, 2018
Most weakly electric fish navigate and communicate by sensing electric signals generated by their muscle-derived electric organs. Adults of one lineage (Apteronotidae), which discharge their electric organs in excess of 1 kHz, instead have an electric ...
Ammon Thompson   +5 more
semanticscholar   +1 more source

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