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| Putman, Nathan F.; Verley, Philippe; Endres, Courtney S.; Lohmann, Kenneth J.. |
| During long-distance migrations, animals navigate using a variety of sensory cues, mechanisms and strategies. Although guidance mechanisms are usually studied under controlled laboratory conditions, such methods seldom allow for navigation behavior to be examined in an environmental context. Similarly, although realistic environmental models are often used to investigate the ecological implications of animal movement, explicit consideration of navigation mechanisms in such models is rare. Here, we used an interdisciplinary approach in which we first conducted lab-based experiments to determine how hatchling loggerhead sea turtles (Caretta caretta) respond to magnetic fields that exist at five widely separated locations along their migratory route, and then... |
| Tipo: Text |
Palavras-chave: Magnetic orientation; Navigation; Magnetoreception; Caretta caretta; Ocean circulation model. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00626/73855/73692.pdf |
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| Baley, C; Cailler, M. |
| The experimental sailing boat "Mesure Z," has been designed and built on behalf of F.I.N., (the French marine industry association). This research project has been managed in close collaboration with Bureau Veritas, Ifremer and the CEA. The GRP hull is similar to that of a production sailing boat, but it has been designed as a transducer-hull, i.e. a hull sufficiently sensitive to allow measurements (hull strains, acceleration, spar loads, etc), due to its structure and mechanical characteristics. This paper presents different aspects of the experimental boat, the materials and structure of the transducer-hull, and the behaviour of the central and bow regions of the hull during sailing. |
| Tipo: Text |
Palavras-chave: Finite element method; Navigation; Measurement; Boating; Sailing ships; Mechanical properties; Ship technology; Composite materials; Navigation; Comportement mécanique; Eléments finis; Mesure; Matériau composite; Voilier. |
| Ano: 1992 |
URL: http://archimer.ifremer.fr/doc/1992/acte-1073.pdf |
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| 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 |
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