Publications des scientifiques de l'IRD

Correa S. B., Betancur R., Mérona Bernard de, Armbruster J. W. (2014). Diet shift of Red Belly Pacu Piaractus brachypomus (Cuvier, 1818) (Characiformes : Serrasalmidae), a Neotropical fish, in the Sepik-Ramu river basin, Papua New Guinea. Neotropical Ichthyology, 12 (4), p. 827-833. ISSN 1679-6225.

Titre du document
Diet shift of Red Belly Pacu Piaractus brachypomus (Cuvier, 1818) (Characiformes : Serrasalmidae), a Neotropical fish, in the Sepik-Ramu river basin, Papua New Guinea
Année de publication
2014
Type de document
Article référencé dans le Web of Science WOS:000347909800018
Auteurs
Correa S. B., Betancur R., Mérona Bernard de, Armbruster J. W.
Source
Neotropical Ichthyology, 2014, 12 (4), p. 827-833 ISSN 1679-6225
Introduction of fish species is a globally widespread practice that causes losses of native species and homogenization of diversity within and across continents. Diet assessments are important tools to depict the ecological function of species introduced into novel ecosystem and possible direct and indirect ecological effects. In this study, we compare the diet of Piaractus brachypomus, a mainly frugivorous Neotropical fish, introduced into the Sepik-Ramu River Basin (Papua New Guinea) nearly two decades ago, to that of similar size individuals from Neotropical populations in the Amazon and Orinoco River basins (South America). In contrast to native populations that feed mainly on terrestrial plants and invertebrates, the diet of introduced P. brachypomus is mainly composed of fish remains and aquatic plants, while terrestrial plants are frequently consumed but in relatively smaller amounts. These findings show that P. brachypomus has an inherently plastic diet that can be adjusted when displaced to a novel geographic area. While trophic plasticity increases the likelihood of a species to establish breeding populations after its introduction, it also reduces our ability to predict negative effects on native species.
Plan de classement
Limnologie biologique / Océanographie biologique [034]
Description Géographique
PAPOUASIE NOUVELLE GUINEE
Localisation
Fonds IRD [F B010063698]
Identifiant IRD
fdi:010063698
Contact