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The longest documented travel by a West Indian manatee

Published online by Cambridge University Press:  29 October 2024

Camila Carvalho de Carvalho Open the ORCID record for Camila Carvalho de Carvalho [Opens in a new window] ,
Iury Tercio Simoes-Sousa ,
Lucas Pereira Santos ,
Katherine Fiedler Choi-Lima ,
Letícia Gonçalves Pereira ,
Maria Danise de Oliveira Alves ,
Adrian Carrero ,
Juan Carlos Santander  and
Vitor Luz Carvalho
Camila Carvalho de Carvalho*
Affiliation:
Associação de Pesquisa e Preservação de Ecossistemas Aquáticos – AQUASIS, Caucaia, Ceará, Brazil IUCN South American Sirenian Specialist Group, Gland, Switzerland IUCN Sirenian Specialist Group, Gland, Switzerland Instituto de Desenvolvimento Sustentável Mamirauá – IDSM, Grupo de Pesquisa em Mamíferos Aquáticos Amazônicos, Tefé, Amazonas, Brazil
Iury Tercio Simoes-Sousa
Affiliation:
Woods Hole Oceanographic Institution, Woods Hole, MA, USA
Lucas Pereira Santos
Affiliation:
Associação de Pesquisa e Preservação de Ecossistemas Aquáticos – AQUASIS, Caucaia, Ceará, Brazil
Katherine Fiedler Choi-Lima
Affiliation:
Associação de Pesquisa e Preservação de Ecossistemas Aquáticos – AQUASIS, Caucaia, Ceará, Brazil
Letícia Gonçalves Pereira
Affiliation:
Associação de Pesquisa e Preservação de Ecossistemas Aquáticos – AQUASIS, Caucaia, Ceará, Brazil
Maria Danise de Oliveira Alves
Affiliation:
Associação de Pesquisa e Preservação de Ecossistemas Aquáticos – AQUASIS, Caucaia, Ceará, Brazil IUCN South American Sirenian Specialist Group, Gland, Switzerland Centro Universitário Frassinetti do Recife – UniFafire, Recife, Pernambuco, Brazil Secretaria de Meio Ambiente, Sustentabilidade e de Fernando de Noronha de Pernambuco – Semas, Recife, Pernambuco, Brazil
Adrian Carrero
Affiliation:
Ministerio del Poder Popular para el Ecosocialismo – MINEC, Caracas, Distrito Capital, Republic Bolivarian of Venezuela
Juan Carlos Santander
Affiliation:
Ministerio del Poder Popular para el Ecosocialismo – MINEC, Caracas, Distrito Capital, Republic Bolivarian of Venezuela
Vitor Luz Carvalho
Affiliation:
Associação de Pesquisa e Preservação de Ecossistemas Aquáticos – AQUASIS, Caucaia, Ceará, Brazil IUCN South American Sirenian Specialist Group, Gland, Switzerland IUCN Sirenian Specialist Group, Gland, Switzerland
*
Corresponding author: Camila Carvalho de Carvalho; Email: [email protected]
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Abstract

In Northeastern Brazil, successful release programmes have been implemented for the conservation of West Indian manatees (Trichechus manatus) since the 1990s. Recently, the non-government organization AQUASIS started releasing manatees in the state of Ceará, where oceanographic conditions and the absence of sheltered places pose new challenges for the release and monitoring of manatees. This research investigates the movement of a manatee named Tico, released in Icapuí, Ceará, Brazil, that travelled approximately 4017 km over 62 days through deep oceanic waters. Correlating Tico's trajectory and velocity with surface currents revealed the influence of the North Brazil Current (NBC) and its vortices on his movement. Tico crossed the diluted Amazon River plume with surface salinity as low as 26 g kg−1 in early August, potentially encountering areas of even lower salinity. Additionally, Tico experienced several storms, with significant rainfall during his journey, which may have provided freshwater. The erratic movement patterns and significant weight loss prompted the rescue of Tico on Isla la Blanquilla, Bolivarian Republic of Venezuela. Tico is currently being temporarily housed in Parque Zoológico y Botánico Bararida in Venezuela. Understanding the nature of Tico's long-distance movement could help inform decisions about his future. AQUASIS proposes to return Tico to Brazil, a region with an ecologically and genetically distinct population from Venezuela, for a second release attempt, incorporating lessons learned from the first release. Furthermore, AQUASIS has the necessary human and financial resources to ensure the continuous monitoring of Tico during his readaptation to the wild.

Keywords

movement ecologyrepatriationrescueSireniaSouth Americatelemetry
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 104 , 2024 , e99
Copyright
Copyright © The Author(s), 2024. Published by Cambridge University Press on behalf of Marine Biological Association of the United Kingdom

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