Where Do Sharks Spend Most of Their Time?

Vimeo Link:  https://vimeo.com/263695232

YouTube Link: https://youtu.be/eKtoUVa0iZs

Team Members:

Neil Hammerschlag,  Rosenstiel School of Marine and Atmospheric Science, University of Miami

Fiona Graham and Patrick Rynne, Waterlust


In order to investigate where bull, great hammerhead and tiger sharks spend the majority of their time, we satellite tagged 86 of them in waters off south Florida and the Bahamas. We used the movement data from these tags to explore whether these highly mobile shark species might benefit from spatial protection, such as marine protected areas (MPAs). We want to protect these sharks because they are important top predators in the ecosystem, and unfortunately many large predators such as sharks are experiencing population declines due to overfishing. We looked at their core home ranges and compared those areas with different management zones to see how well these zones might be helping to protect them and if zones like these might be useful tools for the conservation of such large, highly mobile marine species.

Original Publication:

Graham, Fiona, Patrick Rynne, Maria Estevanez, Jiangang Luo, Jerald S. Ault and Neil Hammerschlag. 2016. Use of marine protected areas and exclusive economic zones in the subtropical western North Atlantic Ocean by large highly mobile sharks. Diversity and Distributions 22: 534-546

Link to Publication: https://onlinelibrary.wiley.com/doi/abs/10.1111/ddi.12425 

Support Provided by: The Batchelor Foundation Inc. Grant Numbers: SHK‐EFP‐10‐01, FKNMS‐2010‐006, SAL‐957, MAF/LIA/22; Disney Conservation Fund; Wells Fargo; Guy Harvey Ocean Foundation; West Coast Inland Navigation District

By the Numbers

Over 40,000 students in 50 US states, the US Virgin Islands, and 25 countries participated as judges in the 2016 Ocean 180 Video Challenge.