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Titolo:
FINDING FOOD - SENSES INVOLVED IN FORAGING FOR INSECT LARVAE IN THE ELECTRIC FISH GNATHONEMUS-PETERSII
Autore:
VONDEREMDE G; BLECKMANN H;
Indirizzi:
UNIV BONN,INST ZOOL,POPPELSDORFER SCHLOSS D-53115 BONN GERMANY
Titolo Testata:
Journal of Experimental Biology
fascicolo: 7, volume: 201, anno: 1998,
pagine: 969 - 980
SICI:
0022-0949(1998)201:7<969:FF-SII>2.0.ZU;2-Q
Fonte:
ISI
Lingua:
ENG
Soggetto:
FAMILIAR ENVIRONMENTS; PREY CAPTURE; LATERAL LINE; BEHAVIOR; ELECTROLOCATION; OBJECTS; DISCRIMINATION; ECHOLOCATION; GYMNOTIFORM; NAVIGATION;
Keywords:
ELECTROLOCATION; VISION; SENSORY PLASTICITY; FOOD SEARCH; MULTIMODAL INTEGRATION; ELECTRIC FISH; GNATHONEMUS PETERSII;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Science Citation Index Expanded
Citazioni:
61
Recensione:
Indirizzi per estratti:
Citazione:
G. Vonderemde e H. Bleckmann, "FINDING FOOD - SENSES INVOLVED IN FORAGING FOR INSECT LARVAE IN THE ELECTRIC FISH GNATHONEMUS-PETERSII", Journal of Experimental Biology, 201(7), 1998, pp. 969-980

Abstract

The weakly electric fish Gnathonemus petersii searches at night for insect larvae in tropical African streams,The aim of this study was to determine the contributions of different sensory modalities to foraging. The time that fish needed to find two randomly placed chironomid larvae was measured. The influence of various senses on search time was investigated by blocking the use of one or more senses. Active electrolocation was used by most fish for prey detection in the dark. In addition, passive electrolocation played a role in some individuals. If light was available, vision could become the dominant sense in some individuals, replacing active electrolocation. The presence of chemical cues decreased prey detection time in most fish. Prey movements also shortened search times when active electrolocation and vision were not possible, indicating that the mechanosensory lateral line also plays a role in the detection of moving prey. The results show that G. petersiiuses several senses simultaneously during foraging. Each individual favours a specific combination of the available sensory inputs. If one sensory modality is eliminated, fish can switch to other modalities, indicating that the food detection system is flexible and plastic.

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Documento generato il 20/09/20 alle ore 04:46:38