After finishing nesting on Long Island, Antigua this past summer, this satellite-tagged hawksbill traveled for more than a month to Long Island, Bahamas. The Long Island-to-Long Island migration covered some 1,600 km, one of the longest migrations we have documented at the early stages of our satellite tracking efforts. A cool way to connect study areas among Layman Lab members! […]
Recently, large collaborations between sea turtle monitoring programs in the West Atlantic have identified regional declines in growth rates for loggerheads, hawksbills, and greens. Data were used from in-water capture-recapture studies. Karen Bjorndal of the University of Florida has taken the helm on three papers that address the trends for each of these species.
Notably, all species exhibited increases in growth rates […]
A new paper out last month presents the possibility that typical sea turtle population assessment methods via foot patrols may be overestimating nesting populations by as much as a factor of 2. You can view it here.
The paper uses satellite tracking of nesting green turtles (Chelonia mydas) at their study site to show that they lay an average of […]
Satellite tracking data is coming in for the 3 hawksbill sea turtles that received Platform Terminal Transmitters just over a month ago on Long Island, Antigua. The transmitters have 2 “saltwater switches” that, when exposed to air as the turtle surfaces to breathe, trigger the transmission of its location and stored sensor data (temperature, depth). So far we have been tracking […]
A couple of weeks ago we deployed 3 Platform Terminal Transmitters (PTTs) onto 3 hawksbill sea turtle females after they nested (we discussed planning for this in a previous post). The process could not have been fun for the 3 turtles, but we tried to minimize our impacts while setting us up to get some invaluable information.
First, we did standard measurements […]
This month we are planning to deploy 3 satellite tracking devices onto 3 hawksbill females. These are known as Platform Terminal Transmitters (PTTs). They provide information on the offshore movements of sea turtles that are otherwise near impossible to study. Roughly 10 years ago, the Jumby Bay Hawksbill Project(JBHP) deployed 3 PTTs, so it will be interesting to revisit the research in […]
On July 1st, 2016, the nation of Antigua and Barbuda started its ban of single use plastic grocery bags. They join a movement to ban or tax single use plastic bags that involves many countries, states, and municipalities including much of Hawaii, Los Angeles, Chicago, the Netherlands, Italy, China, and others. Antigua and Barbuda’s commitment to this issue sets an example that even smaller […]
The start of July was the one month mark of our hawksbill monitoring season in Antigua. While over 29 years of monitoring (1987-2015) there has been a significant long-term increase in nesting numbers, June 2016 had a puzzlingly low amount of activity relative to previous Junes. We had 15 fewer nests than in June 2015 (24 vs. 39), as well as 8 […]
The 2016 International Sea Turtle Symposium (ISTS) recently took place in Lima, Peru. I attended and presented a poster on the issue of sargassum accumulation on our nesting beach in Antigua and the rest of the eastern Caribbean. We have touched on this issue in previous posts, including a natural history note that came out in September.
ISTS Lima proved to be an […]