Catalogo Articoli (Spogli Riviste)

OPAC HELP

Titolo:
Prey-capture behavior in gymnotid electric fish: Motion analysis and effects of water conductivity
Autore:
MacIver, MA; Sharabash, NM; Nelson, ME;
Indirizzi:
Univ Illinois, Program Neurosci, Urbana, IL 61801 USA Univ Illinois Urbana IL USA 61801 Program Neurosci, Urbana, IL 61801 USA Univ Illinois, Beckman Inst Adv Sci & Technol, Urbana, IL 61801 USA Univ Illinois Urbana IL USA 61801 Adv Sci & Technol, Urbana, IL 61801 USA Univ Illinois, Dept Mol & Integrat Physiol, Urbana, IL 61801 USA Univ Illinois Urbana IL USA 61801 Integrat Physiol, Urbana, IL 61801 USA
Titolo Testata:
JOURNAL OF EXPERIMENTAL BIOLOGY
fascicolo: 3, volume: 204, anno: 2001,
pagine: 543 - 557
SICI:
0022-0949(200102)204:3<543:PBIGEF>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
LATERAL-LINE; ACTIVE ELECTROLOCATION; GNATHONEMUS-PETERSII; ORGAN DISCHARGES; SOUTH-AMERICA; CAVE FISH; OBJECTS; EIGENMANNIA; APTERONOTUS; ECHOLOCATION;
Keywords:
computational neuroethology; electrolocation; electroreception; active sensing; conductivity; sensory ecology; nonvisual orienting behaviour; mechanosensory lateral line; backwards locomotion; reverse swimming; motion capture;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Agriculture,Biology & Environmental Sciences
Life Sciences
Citazioni:
75
Recensione:
Indirizzi per estratti:
Indirizzo: Nelson, ME Univ Illinois, Program Neurosci, Urbana, IL 61801 USA Univ Illinois Urbana IL USA 61801 urosci, Urbana, IL 61801 USA
Citazione:
M.A. MacIver et al., "Prey-capture behavior in gymnotid electric fish: Motion analysis and effects of water conductivity", J EXP BIOL, 204(3), 2001, pp. 543-557

Abstract

Animals can actively influence the content and quality of sensory information they acquire from the environment through the positioning of peripheralsensory surfaces. This study investigated receptor surface positioning during prey-capture behavior in weakly electric gymnotiform fish of the genus Apteronotus. Infrared video techniques and three-dimensional model-based tracking methods were used to provide quantitative information on body position and conformation as black ghost (A, albifrons) and brown ghost (A. leptorhynchus) knifefish hunted for prey (Daphnia magna) in the dark. We found that detection distance depends on the electrical conductivity of the surrounding water. Best performance was observed at low water conductivity (2.8 cm mean detection distance and 2 % miss rate at 35 muS cm(-1), A. albions) and poorest performance at high conductivity (1.5 cm mean detection distanceand 11 % miss rate at 600 muS cm(-1), A. albifrons). The observed conductivity-dependence implies that nonvisual prey detection in Apteronotus is likely to be dominated by the electrosense over the range of water conductivities experienced by the animal in its natural environment. This result provides the first evidence for the involvement of electrosensory cues in the prey-capture behavior of gymnotids, but it leaves open the possibility that both the high-frequency (tuberous) and low-frequency (ampullary) electroreceptors may contribute. We describe an electrosensory orienting response to prey, whereby the fish rolls its body following detection to bring the prey above the dorsum, This orienting response and the spatial distribution of prey at the time of detection highlight the importance of the dorsal surfaceof the trunk for electrosensory signal acquisition. Finally, quantitative analysis of fish motion demonstrates that Apteronotus can adapt its trajectory to account for post-detection motion of the prey, suggesting that it uses a closed-loop adaptive tracking strategy, rather than an open-loop ballistic strike strategy, to intercept the prey.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 07/07/20 alle ore 12:55:26