A hybrid swarm of manatees along the Guianas coastline, a peculiar environment under the influence of the Amazon River plume

AUTOR(ES)

LIMA, CAMILLA S.

FONTE

An. Acad. Bras. Ciênc.

DATA DE PUBLICAÇÃO

26/08/2019

RESUMO

Abstract: The West Indian (Trichechus manatus) and Amazonian (T. inunguis) manatees have a sympatric occurrence at the mouth of the Amazon River. A result of this interspecific encounter is the occurrence of hybrids, which are frequently found along the coasts of Amapá state in Brazil, French Guiana and Guyana. Here we present new genetic evidence indicating the occurrence of a hybrid swarm along the Guianas Shield coastline, which is an interspecific hybrid zone that also separates T. manatus populations located east (Brazil) and west (Caribbean, Gulf of Mexico, Florida and Antilles). In addition, we suggest that this hybrid population occupies a peculiar mangrove-rich environment under strong influence of the Amazon River plume, which requires an independent management and should be considered a special conservation area.

Documentos Relacionados

• A numerical study of the Plata River plume along the southeastern South American continental shelf
• Influence of the river flow on the structure of fish assemblage along the longitudinal gradient from river to reservoir
• Effects of thermal environment on dairy cattle under a grazing system in the Western Amazon, Brazil
• Spatial resolution influence on the identification of land cover classes in the Amazon environment
• Optimization of concrete I-beams using a new hybrid glowworm swarm algorithm