Changes in behavior with increasing experience with a novel prey in fry of the Central American cichlid, Cichlasoma managuense (Teleostei: Cichlidae)

Meyer, Axel

Changes in behavior with increasing experience with a novel prey in fry of the Central American cichlid, Cichlasoma managuense (Teleostei: Cichlidae)

Dateien

Changes_in_behavior_with_increasing_experience_1986.pdfGröße: 25.75 MBDownloads: 378

Datum

1986

Open Access-Veröffentlichung

Open Access Green

Sammlungen

Biologie

Publikationstyp

Zeitschriftenartikel

Publikationsstatus

Published

Erschienen in

Behaviour. 1986, 98(1), pp. 145-168. ISSN 0005-7959. eISSN 1568-539X. Available under: doi: 10.1163/156853986X00946

Zusammenfassung

With increasing experience with the novel prey, Daphnia, the fish became less hesitant to attack Daphnia. The fish took fewer nonprey items per prey item with increased experience. They also became more efficient in handling the novel prey. There was no indication of the formation of a search image. The multiple regression model revealed that, although the fish grew during the experimental period, their increased size did not contribute significantly to the increase in capture success. Contrary to previous studies size did not influence capture success within the size range used in these experiments. The individual variation in capture success was large in all groups of Cichlasoma managuense. The most successful predators were the fish who persistantly attampted to catch prey and had the highest number of previous experience with the novel prey. The morphological variable weight was negatively correlated with capture success, witch may suggest that a hungrier fish is more motivated to prey and a more successful predator. An increase in eye diameter brought about an increase in capture success, due probably to an increased visual acuity, hence it may suggest a possible ecological effect of this morphological variable.

Zusammenfassung in einer weiteren Sprache

Mit zunehmender Erfahrung mit dem neuen Beuteobjekt Daphnia nahm die Unentschlossenheit, eine Beuteattacke zu initiieren, ab und die Fische nahmen weniger Nichtbeuteobjekte auf. Die Effizienz der Behandlung des neuen Beuteobjekts wuchs mit Erfahrung. Es wird nicht angenommen, dass die Bildung eines Beuteschemas stattfand. Das mehrfache Regressionsmodel brachte zum Vorschein, dass die Länge der Fische den Fangerfolg nicht beeinflusste, obwohl die Fische während des Experiments wuchsen. Im Gegensatz zu früheren Hypothesen wurde hier kein Einfluss der Länge der Fische auf den Fangerfolg festgestellt. Die individuellen Unterschiede im Fangerfolg waren groß in allen Gruppen von Chichlasoma managuense. Die erfolgreichsten Räuber waren ausdauernd versuchende, beuteerfahrene Fische. Die morphologische Variable "Gewicht" korrelierte negativ mit Fangerfolg, was durch eine von erhöhtem Hunger erzeugte Motivationssteigerung herrühren könnte. Eine Vergrößerung des Augendurchmessers bewirkte eine Erhöhung des Fangerfolgs; die Variable Sehschärfe könnte daher ökologisch wichtig sein.

Fachgebiet (DDC)

570 Biowissenschaften, Biologie

Zitieren

ISO 690

MEYER, Axel, 1986. Changes in behavior with increasing experience with a novel prey in fry of the Central American cichlid, Cichlasoma managuense (Teleostei: Cichlidae). In: Behaviour. 1986, 98(1), pp. 145-168. ISSN 0005-7959. eISSN 1568-539X. Available under: doi: 10.1163/156853986X00946

BibTex

@article{Meyer1986Chang-7449,
  year={1986},
  doi={10.1163/156853986X00946},
  title={Changes in behavior with increasing experience with a novel prey in fry of the Central American cichlid, Cichlasoma managuense (Teleostei: Cichlidae)},
  number={1},
  volume={98},
  issn={0005-7959},
  journal={Behaviour},
  pages={145--168},
  author={Meyer, Axel}
}

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