Known as the 'Mother of Sharks,' I'm a Latina marine biologist who has a lot of labels: science communicator, conservationist, author, educator, podcaster, television presenter. You might have seen me on Discovery Channel's Shark Week, National Geographic, BBC Wildlife, heard my TEDx talk or read my Scholastic books.
Animal movement are anything but random; they’re governed by a myriad of factors, both internal and external. But understanding the movements of animals in their natural habitats is akin to deciphering a complex puzzle. One whose pieces are missing or somewhere in the box and the instructions are in a foreign language that Google Translate doesn’t have on their list.
How do monarch butterflies navigate thousands of miles during migration, returning to the same overwintering sites each year? How do salmon find their way back to the exact stream where they were born after years of oceanic travel, often spanning thousands of miles?We do know that predator movements are influenced by a myriad of factors, including energy requirements, reproductive status, environmental conditions, prey availability, competition, and predation risk.
The sharks showcased distinct movement signatures, shaped predominantly by their location and demographic attributes. Juvenile sharks at Aptos charted erratic trajectories, while their counterparts at Año Nuevo and the Farallon Islands opted for deeper dives and more purposeful paths. Nighttime movements differed significantly from daytime activities, with sharks displaying lower activity levels and straighter swimming trajectories during the night.
Understanding the nuances of predator movements holds profound implications for conservation and management efforts. Says Jewell, “The results are important because they suggest the same shark will likely behave differently from one area to the next.” By unraveling the factors driving movement patterns, researchers can better predict and mitigate human-wildlife conflicts, preserve critical habitats, and inform the design of marine protected areas.
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