Horizon / Plein textes La base de ressources documentaires de l'IRD

IRD

 

Publications des scientifiques de l'IRD

Hauser M., Duponchelle Fabrice, Hermann T. W., Limburg K. E., Castello L., Stewart D. J., Torrente-Vilara G., Garcia-Vasquez A., Garcia-Davila C., Pouilly Marc, Pecheyran C., Ponzevera E., Renno Jean-François, Moret A. S., Doria C. R. C. (2019). Unmasking continental natal homing in goliath catfish from the upper Amazon. Freshwater Biology, [Early access], [12 p.]. ISSN 0046-5070

Accès réservé (Intranet IRD) Demander le PDF

Lien direct chez l'éditeur doi:10.1111/fwb.13427

Titre
Unmasking continental natal homing in goliath catfish from the upper Amazon
Année de publication2019
Type de documentArticle référencé dans le Web of Science WOS:000501987000001
AuteursHauser M., Duponchelle Fabrice, Hermann T. W., Limburg K. E., Castello L., Stewart D. J., Torrente-Vilara G., Garcia-Vasquez A., Garcia-Davila C., Pouilly Marc, Pecheyran C., Ponzevera E., Renno Jean-François, Moret A. S., Doria C. R. C.
SourceFreshwater Biology, 2019, [Early access], p. [12 p.]. p. [12 p.] ISSN 0046-5070
RésuméAmazonian goliath catfishes are widespread in the Amazon Basin. Recently, otolith Sr-87:Sr-86 analyses using laser ablation-multi-collector-inductively coupled plasma mass spectrometry (LA-MC-ICPMS) revealed a >8,000 km trans-Amazonian natal homing in Brachyplatystoma rousseauxii among fish caught and hatched in the largest Amazon River tributary, the upper Madeira basin. Although also suspected for fish in the upper Amazon, homing could not be demonstrated owing to less distinct environmental Sr-87:Sr-86 gradients along the Amazon mainstem. Using scanning X-ray fluorescence microscopy (SXFM), a separate study provided evidence that Se:Ca and Sr:Ca are useful markers for identifying migration into Andean headwaters and the estuarine environment. We analysed otoliths of known Sr-87:Sr-86 profiles using SXFM mapping to test if Sr:Ca and Se:Ca patterns could demonstrate natal homing for three fish caught in the upper Amazon, using as reference two individuals that were natal homers and two forced residents (hatched after the construction of hydroelectric dams on the Madeira River) from the upper Madeira River. As hypothesised, although the Sr isotope profiles of the upper Amazon individuals were uninformative, two of them presented similar alternating mirror patterns of Sr:Ca and Se:Ca to those of the upper Madeira natal homers, indicating migrations out of the Andean region and into the estuary area. Both were therefore natal homers from the upper Amazon. The third individual from the upper Amazon presented similar Sr:Ca and Se:Ca patterns to those of the upper Madeira residents, suggesting it was a natural resident from the upper Amazon. By combining the results of Sr-87:Sr-86 analyses (LA-MC-ICPMS) and Sr:Ca and Se:Ca mappings (SXFM) that are completely independent of one another, we demonstrated that B. rousseauxii also performs natal homing in the upper Amazon. Our results indicate that the life cycle of B. rousseauxii is more complex than previous literature hypothesised, with the existence of partial migration, even in absence of physical barriers. Quantifying the relative importance of these different life-history strategies will have important implications for fisheries management. Our results also lay the groundwork for conservation efforts in the context of hydropower development in the Amazon Basin and set testable hypotheses of the potential impacts of the Madeira River dams.
Plan de classementLimnologie biologique / Océanographie biologique [034] ; Ressources halieutiques [040]
Descr. géo.AMAZONE BASSIN ; MADEIRA BASSIN
LocalisationFonds IRD [F B010077430]
Identifiant IRDfdi:010077430
Lien permanenthttp://www.documentation.ird.fr/hor/fdi:010077430

Export des données

Disponibilité des documents

Télechargment fichier PDF téléchargeable

Lien sur le Web lien chez l'éditeur

Accès réservé en accès réservé

HAL en libre accès sur HAL


Accès aux documents originaux :

Le FDI est labellisé CollEx

Accès direct

Bureau du chercheur

Site de la documentation

Espace intranet IST (accès réservé)

Suivi des publications IRD (accès réservé)

Mentions légales

Services Horizon

Poser une question

Consulter l'aide en ligne

Déposer une publication (accès réservé)

S'abonner au flux RSS

Voir les tableaux chronologiques et thématiques

Centres de documentation

Bondy

Montpellier (centre IRD)

Montpellier (MSE)

Cayenne

Nouméa

Papeete

Abidjan

Dakar

Niamey

Ouagadougou

Tunis

La Paz

Quito