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

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 Guyan...

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Published in:Anais da Academia Brasileira de Ciências 2019-01, Vol.91 (suppl 3), p.e20190325-e20190325
Main Authors: Lima, Camilla S, Magalhães, Rafael F, Marmontel, Miriam, Meirelles, Ana Carolina, Carvalho, Vitor Luz, Lavergne, Anne, Thoisy, Benoit DE, Santos, Fabrício R
Format: Article
Language:English
Subjects:
Amazon River plume
Animals
Bayes Theorem
Biodiversity
Brazil
Caribbean Region
Conservation Genetics
Genetic Variation
Guianas coastline
Guyana
Hybrid zone
Hybridization, Genetic
Introgression
Life Sciences
Microbiology and Parasitology
MULTIDISCIPLINARY SCIENCES
Phylogeny
Population Dynamics
Populations and Evolution
Rivers
Species Specificity
Trichechus
Trichechus inunguis
Trichechus manatus
Virology
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Summary: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.
ISSN:0001-3765
1678-2690
1678-2690
DOI:10.1590/0001-3765201920190325