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| Cox, Samantha; Authier, Matthieu; Orgeret, Florian; Weimerskirch, Henri; Guinet, Christophe. |
| High juvenile mortality rates are typical of many long‐lived marine vertebrate predators. Insufficient development in dive and forage ability is considered a key driver of this. However, direct links to survival outcome are sparse, particularly in free‐ranging marine animals that may not return to land. In this study, we conduct exploratory investigations toward early mortality in juvenile southern elephant seals Mirounga leonina. Twenty postweaning pups were equipped with (a) a new‐generation satellite relay data tag, capable of remotely transmitting fine‐scale behavioral movements from accelerometers, and (b) a location transmitting only tag (so that mortality events could be distinguished from device failures). Individuals were followed during their... |
| Tipo: Text |
Palavras-chave: Bio-logging; Early life; Foraging ecology; Juvenile mortality; Mirounga leonina; Southern elephant seal; Survival analyses. |
| Ano: 2020 |
URL: https://archimer.ifremer.fr/doc/00598/71016/69289.pdf |
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| Heerah, Karine; Cox, Samantha; Blevin, Pierre; Guinet, Christophe; Charrassin, Jean-benoît. |
| Dive data collected from archival and satellite tags can provide valuable information on foraging activity via the characterization of movement patterns (e.g., wiggles, hunting time). However, a lack of validation limits interpretation of what these metrics truly represent in terms of behavior and how predators interact with prey. Head-mounted accelerometers have proven to be effective for detecting prey catch attempt (PrCA) behaviors, and thus can provide a more direct measure of foraging activity. However, device retrieval is typically required to access the high-resolution data they record, restricting use to animals returning to predictable locations. In this study, we present and validate data obtained from newly developed satellite-relay data tags,... |
| Tipo: Text |
Palavras-chave: Satellite relayed data logger; Accelerometers; Diving behavior; Movement ecology; Foraging; Sea-ice; Biologging. |
| Ano: 2019 |
URL: https://archimer.ifremer.fr/doc/00595/70687/68895.pdf |
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