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- Title
Seasonal occurrence and individual variability of bull sharks, Carcharhinus leucas, in a marine reserve of the southwestern Gulf of California.
- Authors
Lara-Lizardi, Frida; Castro, Eleazar; Leos Barajas, Vianey; Morales, Juan Manuel; Hoyos-Padilla, Edgar Mauricio; Ketchum, James
- Abstract
Background: Studying how the bull sharks aggregate and how they can be driven by life history traits such as reproduction, prey availability, predator avoidance and social interaction in a National Park such as Cabo Pulmo, is key to understand and protect the species. Methods: The occurrence variability of 32 bull sharks tracked with passive acoustic telemetry were investigated via a hierarchical logistic regression model, with inference conducted in a Bayesian framework, comparing sex, and their response to temperature and chlorophyll. Results: Based on the fitted model, occurrence probability varied by sex and length. Juvenile females had the highest values, whereas adult males the lowest. A strong seasonality or day of the year was recorded, where sharks were generally absent during September–November. However, some sharks did not show the common pattern, being detected just for a short period. This is one of the first studies where the Bayesian framework is used to study passive acoustic telemetry proving the potential to be used in further studies.
- Subjects
GULF of California (Mexico); MARINE parks &; reserves; LIFE history theory; SHARKS; LARVAL dispersal; PREY availability; REPRODUCTION; PREDATION; TRAFFIC violations; LOGISTIC regression analysis
- Publication
PeerJ, 2024, p1
- ISSN
2167-8359
- Publication type
Article
- DOI
10.7717/peerj.17192