An interesting new study using stable isotopes to look at the feeding ecology of more than 5,000 individual sharks across 114 species. The cartoon above does a nice job of characterizing this study, and here is a good summary.
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 […]
I am always excited to report positive news (reported at length here). Starting in the new year, the U.S. National Oceanic and Atmospheric Administration (NOAA) will require countries exporting seafood to the United States to demonstrate that their fisheries comply with the U.S. Marine Mammal Protection Act (MMPA). The US is the world’s largest seafood importer and the MMPA is among […]
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 […]
Shortly after 2am on July 24th, the Jumby Bay Hawksbill Project in Antigua observed our first hawksbill sea turtle hatchlings of the season! Hawksbills typically lay around 150 eggs that will incubate in their sandy chambers for 50-60 days. After hatching, the turtles will rest for one to two days while […]
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 U.S. now recognizes Nassau grouper as a Threatened Species under the Endangered Species Act. Nassau grouper have been heavily harvested throughout its native range and many efforts are being placed to recover their populations (see here and here ). Along the Florida coastline they are considered to be commercially extinct, meaning their abundance is too low to harvest. This is […]