Nunez Rodriguez Jesus, Duponchelle Fabrice, Cotrina-Doria M., Renno Jean-François, Chavez-Veintimilla C., Rebaza C., Deza S., Garcia-Davila C., Chu-Koo F., Tello S., Baras Etienne. (2015). Movement patterns and home range of wild and re-stocked Arapaima gigas (Schinz, 1822) monitored by radio-telemetry in Lake Imiria, Peru. In :
Darias Maria Jose (ed.), Amadio S. (ed.), Rosenthal H. (ed.). Proceedings of the 4th International Conference of the "Research Network on Amazonian Ichthyofauna" (RIIA). Journal of Applied Ichthyology, 31 (no special S4), p. 10-18. International Conference of the “Research Network on Amazonian Ichthyofauna” (RIIA), 4., Cochabamba (BOL), 2014/09/30-2014/10/02. ISSN 0175-8659.
Titre du document
Movement patterns and home range of wild and re-stocked Arapaima gigas (Schinz, 1822) monitored by radio-telemetry in Lake Imiria, Peru
Année de publication
2015
Auteurs
Nunez Rodriguez Jesus, Duponchelle Fabrice, Cotrina-Doria M., Renno Jean-François, Chavez-Veintimilla C., Rebaza C., Deza S., Garcia-Davila C., Chu-Koo F., Tello S., Baras Etienne
In
Darias Maria Jose (ed.), Amadio S. (ed.), Rosenthal H. (ed.), Proceedings of the 4th International Conference of the "Research Network on Amazonian Ichthyofauna" (RIIA)
Source
Journal of Applied Ichthyology, 2015,
31 (no special S4), p. 10-18 ISSN 0175-8659
Colloque
International Conference of the “Research Network on Amazonian Ichthyofauna” (RIIA), 4., Cochabamba (BOL), 2014/09/30-2014/10/02
The objectives of this study were the evaluation of the adaptation capabilities of re-stocked Arapaima gigas and their individual behavioural movements (males and females) to the wild environment compared to wild individuals still present in Lake Imiria, Peru and their survival rates. Using radio telemetry (external transmitters, 75x17mm diameter, 35g in air, ATS, Isanti, MN, USA), adaptation and behaviour of externally tagged, restocked cage-raised (124-143cm TL, n=14) and wild A.gigas (117-153cm TL, n=8), were monitored, focusing observations on individual behaviour and preferential localization in the lake. Home range size determined by minimum convex polygons (MCP95) or Kernel Density Estimation (KDE95) varied from 0.001 to around 4km(2), but the average KDE50 was relatively small (0.1km(2)) in comparison to the tracked fish size (117-153cm TL), indicating strong residency and presumably territoriality in this species. Also observed was that the habitat was concentrated along the shoreline of the lake and closely related to the presence of aquatic vegetation. Home range localization estimates and apparent travelled distance of wild and restocked fishes were very similar, thereby suggesting a rapid and good acclimation and survival of cultured re-stocked fish to a natural environment.
Plan de classement
Ecologie, systèmes aquatiques [036]
;
Ressources halieutiques [040]
Description Géographique
PEROU ; AMAZONIE
Localisation
Fonds IRD [F B010066194]
Identifiant IRD
fdi:010066194
