Title :

Ontogenetic dietary changes of whitefish larvae : insights from field and experimental observations

Author(s) :

Anneville, Orlane [Auteur]
Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques [CARRTEL]
Berthon, Vincent [Auteur]
Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques [CARRTEL]
Glippa, Olivier [Auteur]
Centre Alpin de Recherche sur les Réseaux Trophiques et Ecosystèmes Limniques [CARRTEL]
Mahjoub, Mohamed-Sofiane [Auteur]
National Taiwan Ocean University [NTOU]
Molinero, Juan Carlos [Auteur]
Souissi, Sami [Auteur]
Laboratoire d’Océanologie et de Géosciences (LOG) - UMR 8187 [LOG]

Journal title :

Environmental Biology of Fishes

Pages :

27-38

Publisher :

Springer

Publication date :

2011

ISSN :

0378-1909

Keyword(s) :

COMPORTEMENT D'EVITEMENT
SELECTION DE LA PROIE
ONTOGENIE
ZOOPLANCTON
LAVARET

English keyword(s) :

PREDATION
LAC D'ANNECY
ESCAPE BEHAVIOUR
PREY SELECTIVITY
COREGONIDS
ONTOGENY

HAL domain(s) :

Sciences du Vivant [q-bio]

English abstract : [en]

Ontogenetic changes in resource use are widespread in many fish species. This study investigated the feeding habits of whitefish (C. lavaretus L.) larvae in Lake Annecy (France) coupled with experimental behavioral studies ...
Show more >Ontogenetic changes in resource use are widespread in many fish species. This study investigated the feeding habits of whitefish (C. lavaretus L.) larvae in Lake Annecy (France) coupled with experimental behavioral studies in order to identify the underlying mechanisms of the ontogenetic shifts in the diet. The predatory behavior of wild larvae, and the escape responses of their zooplankton prey were both videorecorded in experimental tanks under controlled laboratory conditions. Ontogenetic diet patterns showed that young whitefish larvae have a preference for small cyclops, while older larvae selectively predate cladocerans. Our experimental observations showed that the capture success rate also varied in relation to ontogenetic development in fish. Young larvae were more successful in capturing small copepods, whereas old larvae were more successful in capturing Daphnia. In addition, the larvae were able to adjust their predatory behavior (speed, pursuit) according to the swimming pattern of the prey. These observations suggest that the selective predation on cladocerans observed in old larvae is the outcome of both active and passive choices depending on the escape swimming behavior of the prey, and handling time of the predator.Show less >

Language :

Anglais

Peer reviewed article :

Oui

Audience :

Internationale

Popular science :

Non

Collections :

• Laboratoire d'Océanologie et de Géosciences (LOG) - UMR 8187

Source :

Harvested from HAL