With a team of collaborators, we tested new specially-designed prototypes of Lotek microsatellite tags on 160 juvenile sea turtles of four species in the North Atlantic. The data from these tags was published in a new article, "Novel Microsatellite Tags Hold Promise for Illuminating the Lost Years in Four Sea Turtle Species." We sat down with lead-author Tony Candela to talk about this article, his process as lead-author, and the important implications of these findings for the bio-logging community.
When fishermen and researchers collaborate, they create opportunities to amplify efforts for the research and conservation of sea turtles. This past spring, Upwell participated in these efforts by providing a satellite tag for Liam Neythan, a leatherback sea turtle that was saved in Sinaloa, Mexico. Our collaborators, the fishers Edmundo Rafael Garcías Burgos and Mariano García Olivas, as well as Dr. Alan Zavala Norzagaray and the CIIDIR IPN Unidad Sinaloa are the key collaborators and heroes in this story.
Upwell Research Project Technician Sierra Fullmer shares some of her most exciting sightings while conducting aerial surveys to look for leatherbacks off of the US West Coast.
Most sea turtle species migrate and spend large amounts of their life history in areas of the ocean considered “high seas.” The high seas are the parts of the ocean that are not under the jurisdiction of any nation. In June of 2023, after almost two decades of negotiations, UN Member states adopted the Biodiversity in Areas Beyond National Jurisdiction treaty (also known as the High Seas Treaty) to provide a coherent and holistic framework for protecting the high seas. Earlier this month, Upwell Executive Director Dr. George Shillinger attended the High Seas Treaty symposium to learn more about how its implementation may impact sea turtle populations and to seek opportunities to further the protection of turtles at sea.
The new publication "Incorporating multidimensional behavior into a risk management tool for a critically endangered and migratory species," takes a look at how data on leatherback diving behavior can be used to improve the South Pacific TurtleWatch tool aimed at reducing bycatch.
In October of 2021, Upwell and our partners from the National Oceanic and Atmospheric Administration (NOAA) tagged one of the largest leatherbacks ever encountered in the California Current foraging zone weighing in at 1,419 pounds! This massive male leatherback was dubbed “Bumpy” because of the distinctive bumps on the rear of his carapace, which were likely caused by a prior ship strike. Find out more about where Bumpy has traveled.
We all know buying local reduces carbon emissions and can help combat climate change, but did you know it can also help reduce threats to sea turtles? International shipping often relies on the use of massive cargo ships to transport goods across our oceans. Sea turtle migration paths can intersect with vessel traffic and nearshore shipping lanes can overlap with important foraging habitats.
The Bay of La Paz, Mexico is filled with scattered mangrove forests, rocky reefs, and rugged coastlines. Bycatch is a pressing issue in the region. Although regulations exist to limit unselective fishing gear like gillnets, enforcement can be weak. Sea Turtle Spotters help Upwell as citizen scientists, reporting both live and dead sea turtles to Upwell researchers to help us learn more about the threats they face at sea.
A new generation of artisanal fishers in the El Pardito fishing cooperative of Baja California Sur is working to replenish overfished stocks and reduce sea turtle bycatch. Upwell researcher Stephanie Rousso has seen first-hand the threats posed by artisanal fisheries to sea turtles, mostly by entanglement in gillnets. In collaboration with fishers from the El Pardito cooperative, Stephanie is designing a pilot program to measure and reduce sea turtle bycatch.
New technologies are finally shedding light on one of the greatest mysteries in sea turtle biology. Using prototype “micro-satellite” tags specifically designed to fit juvenile leatherback turtles, Upwell and Florida Atlantic University researchers released eighteen captive reared juvenile leatherbacks to track their movements off the coast of Florida and shed light on the “lost years” phase of their lives.
Concerned scientists, conservationists, and managers gathered in 2012 to discuss ways to stop the extinction of East Pacific leatherbacks; they formed a regional network called LaudOPO in 2015. This network has developed an Action Plan to address the two main threats to East Pacific leatherbacks: fisheries bycatch and egg loss or reduced hatchling recruitment at nesting beaches. Upwell is investigating active recovery techniques such as egg translocation and headstarting as options to complement LaudOPO’s conservation action plan.
Learn about the female turtle tagged by NOAA and Upwell in 2020 whose transmitter is still reporting. She was tagged in September 2019, and she returned to same area where she was tagged in the Gulf of the Farallones this year on 31 July 2020. It’s exciting when we see one of these movement records close the loop! Additional leatherback sightings in the Monterey Bay have been reported recently.
Data collected at nesting beaches give us only a brief glimpse into sea turtles’ intricate life histories. Satellite tags are one of the best tools available to collect data on sea turtle movements and behaviors in marine habitats. But where tags are deployed matters. Deploying tags at nesting beaches means we are limiting our research scope to the females within a population that are nesting in a given year.
