Sabiia Seb
PortuguêsEspañolEnglish
Embrapa
        Busca avançada

Botão Atualizar


Botão Atualizar

Ordenar por: RelevânciaAutorTítuloAnoImprime registros no formato resumido
Registros recuperados: 3
Primeira ... 1 ... Última
Imagem não selecionada

Imprime registro no formato completo
Homing in green turtles Chelonia mydas: oceanic currents act as a constraint rather than as an information source ArchiMer
Girard, Charlotte; Sudre, Joël; Benhamou, Simon; Roos, David; Luschi, Paolo.
As open sea navigators, green turtles Chelonia mydas have to deal with oceanic currents. These currents may have a mechanical influence, forcing turtles away from their desired course, but they may also provide information to navigating turtles by bringing chemical cues down-current from their target area. In the present paper, we have introduced new path analysis methods, coupling remote-sensing oceanographic data and satellite-tracking data in order to test these hypotheses. These methods were exemplified on the homing routes of 3 green turtles nesting on Europa, an isolated island in the southern part of Mozambique Channel. The turtles, displaced by ship east-southeast from Europa, returned to their nesting island in 13 to 59 d, following long,...
Tipo: Text Palavras-chave: Sea turtle; Satellite telemetry; Oceanography; Navigation; Homing; Current drift.
Ano: 2006 URL: http://archimer.ifremer.fr/doc/2006/publication-1984.pdf
Imagem não selecionada

Imprime registro no formato completo
Marine turtles use geomagnetic cues during open-sea homing ArchiMer
Luschi, Paolo; Benhamou, Simon; Girard, Charlotte; Ciccione, Stéphane; Roos, David; Sudre, Joël; Benvenuti, Silvano.
Marine turtles are renowned long-distance navigators, able to reach remote targets in the oceanic environment; yet the sensory cues and navigational mechanisms they employ remain unclear [1-3]. Recent arena experiments indicated an involvement of magnetic cues in juvenile turtles' homing ability after simulated displacements [4, 5], but the actual role of geomagnetic information in guiding turtles navigating in their natural environment has remained beyond the reach of experimental investigations. In the present experiment, twenty satellite-tracked green turtles (Chelonia mydas) were transported to four open-sea release sites 100-120 km from their nesting beach on Mayotte island in the Mozambique Channel; 13 of them had magnets attached to their head [6]...
Tipo: Text
Ano: 2007 URL: http://archimer.ifremer.fr/doc/2007/publication-2407.pdf
Imagem não selecionada

Imprime registro no formato completo
The Role of Geomagnetic Cues in Green Turtle Open Sea Navigation ArchiMer
Benhamou, Simon; Sudre, Joël; Bourjea, Jerome; Ciccione, Stephane; De Santis, Angelo; Luschi, Paolo.
Background: Laboratory and field experiments have provided evidence that sea turtles use geomagnetic cues to navigate in the open sea. For instance, green turtles (Chelonia mydas) displaced 100 km away from their nesting site were impaired in returning home when carrying a strong magnet glued on the head. However, the actual role of geomagnetic cues remains unclear, since magnetically treated green turtles can perform large scale (.2000 km) post-nesting migrations no differently from controls. Methodology/Principal Findings: In the present homing experiment, 24 green turtles were displaced 200 km away from their nesting site on an oceanic island, and tracked, for the first time in this type of experiment, with Global Positioning System (GPS), which is able...
Tipo: Text
Ano: 2011 URL: http://archimer.ifremer.fr/doc/00048/15958/13390.pdf
Registros recuperados: 3
Primeira ... 1 ... Última
 

Empresa Brasileira de Pesquisa Agropecuária - Embrapa
Todos os direitos reservados, conforme Lei n° 9.610
Política de Privacidade
Área restrita

Embrapa
Parque Estação Biológica - PqEB s/n°
Brasília, DF - Brasil - CEP 70770-901
Fone: (61) 3448-4433 - Fax: (61) 3448-4890 / 3448-4891 SAC: https://www.embrapa.br/fale-conosco

Valid HTML 4.01 Transitional