Influence of sea turtle nesting on hunting behavior and movements of jaguars in the dry forest of northwest Costa Rica
Date
2020-11Author
Carrillo, Eduardo
Montalvo, Victor
Fuller, Todd K.
Sáenz-Bolaños, Carolina
Cruz Díaz, Juan Carlos
Hagnauer, Isabel
Herrera, Hansell
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Show full item recordAbstract
Jaguars (Panthera onca) are opportunistic predators that prey on large profitable prey
items, such as sea turtles at nesting beaches. Here, we use jaguar and sea turtle trackcount surveys, combined with satellite telemetry of one jaguar, to evaluate whether
jaguar hunting behavior and movements are influenced by seasonal sea turtle nesting
in the Sector Santa Rosa of Área de Conservación Guanacaste in northwest Costa
Rica. We used generalized linear models to evaluate the effect of moon phase and sea
surface temperature on olive ridley (Lepidochelis olivacea) and green turtle (Chelonia
mydas) nesting abundance, as well as the combination of these predictors on the frequency of jaguar predation activity (proximity to nesting beaches) and movements.
For home-range size and location analyses, we calculated kernel density estimates
for each season at three different temporal scales. Sea turtle nesting season influenced jaguar activity patterns, as well as sea turtle abundance was related to jaguar
locations and predation events, but jaguar home-range size (88.8 km2
overall) did not
differ between nesting seasons or among temporal scales. Environmental conditions
influenced sea turtle nesting and, as a consequence, also influenced jaguar movements and foraging activity. Our study defined the home range of a female jaguar in
the tropical dry forest and its relationship to seasonally abundant turtles. Additional
information related to the effect of tourism on jaguar–sea turtle interactions would
improve conservation of these species at unique nesting beaches in the area.
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- Artículo Científico [97]