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by Tony Candela, Jeanette Wyneken, Peter Leijen, Philippe Gaspar, Frederic Vandeperre, Terry Norton, Walter Mustin, Julien Temple-Boyer, Emily Turla, Nicole Barbour, Sean Williamson, Rui Guedes, Gonçalo Graça, Ivan Beltran, Joana Batalha, Andrea Herguedas, Davide Zailo, Vandanaa Baboolal, Francesca Casella and George L. Shillinger
Abstract After hatching, sea turtles leave the nest and disperse into the ocean. Many years later, they return to their natal coastlines. The period between their leaving and their returning to natal areas, known as the “Lost Years”, is poorly understood. Satellite tracking studies aimed at studying the “Lost Years”…
by Melina Barrionuevo and Esteban Frere
Abstract We studied the migration of Magellanic penguins near the southern tip of the breeding distribution, and for the first time found evidence of partial migration for this species within the same colony. Forty-three percent of the penguins studied stayed within ~290 km of the colony (residents), while others went…
by Alexander L. Koeberle, Webster Pearsall, Brad E. Hammers, Daniel Mulhall, James E. McKenna Jr., Marc Chalupnicki & Suresh A. Sethi
Abstract Estimates of juvenile survival are critical for informing population dynamics and the ecology of fish, yet these demographic parameters are difficult to measure. Here, we demonstrate that advances in animal tracking technology provide opportunities to evaluate survival of juvenile tagged fish. We implemented a whole-lake telemetry array in conjunction…
by Robert J. Lennox, Kim Aarestrup, Josep Alós, Robert Arlinghaus, Eneko Aspillaga, Michael G. Bertram, Kim Birnie-Gauvin, Tomas Brodin, Steven J. Cooke, Lotte S. Dahlmo, Félicie Dhellemmes, Karl Ø. Gjelland, Gustav Hellström, Henry Hershey, Christopher Holbrook, Thomas Klefoth, Susan Lowerre-Barbieri, Christopher T. Monk, Cecilie Iden Nilsen, Ine Pauwels, Renanel Pickholtz, Marie Prchalová, Jan Reubens, Milan Říha, David Villegas-Ríos, Knut Wiik Vollset, Samuel Westrelin & Henrik Baktoft
Abstract Geolocating aquatic animals with acoustic tags has been ongoing for decades, relying on the detection of acoustic signals at multiple receivers with known positions to calculate a 2D or 3D position, and ultimately recreate the path of an aquatic animal from detections at fixed stations. This method of underwater…
by John Fredrik Strøm, Ola Ugedal, Audun Håvard Rikardsen & Eva Bonsak Thorstad
Abstract Atlantic salmon Salmo salar are experiencing widespread population declines, and reductions in growth and survival in the marine environment are contributing factors. Our aims were to estimate marine food consumption of adult salmon and to determine how energetics would be directly affected by the increased ocean temperatures associated with climate change.…
Abstract Juveniles of marine species, such as sea turtles, are often understudied in movement ecology. To determine dispersal patterns and release effects, we released 40 satellite-tagged juvenile head-started green turtles (Chelonia mydas, 1–4 years) from two separate locations (January and July 2023) off the coast of the Cayman Islands. A…
by Paulo Catry, Cheibani Senhoury, Ebaye Sidina, Nahi El Bar, Abdallahi Samba Bilal, Francesco Ventura, Brendan J. Godley, Antonio J. Pires, Aissa Regalla, and Ana R. Patrício
Abstract There is a remarkable paucity of estimates of the numeric importance of sea turtles at foraging grounds. The Banc d'Arguin (BA) is a vast shallow marine area off the coast of Mauritania, known as a site of world importance for coastal migratory birds and other biodiversity, including extensive seagrass beds. We sampled foraging…
by R. D. Hedger, M. Kjellman, E. B. Thorstad, J. F. Strøm and A. H. Rikardsen
Abstract Atlantic salmon post-spawners from a population in northern Norway were tagged with data storage tags (N = 773), and the depth use and diving behaviour of recaptured individuals within the coastal zone were examined, both on their outward migration to sea (N = 44) and their return to the natal river after overwintering…
by Armando J. B. Santos, Daniel H. G. Vieira, Claudio Bellini, Gilberto Corso, Simona A. Ceriani & Mariana M. P. B. Fuentes
Abstract Population abundance data are often used to define species’ conservation status. Abundance of marine turtles is typically estimated using nesting beach monitoring data such as nest counts and clutch frequency (CF, i.e., the number of nests female turtles lay within a nesting season). However, studies have shown that CF…
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