I recently traveled to Barbados, one of the most eastern windward islands in the Caribbean in late August. Prior to 1998, it was legal to kill sea turtles for food and take their eggs in Barbados. Subsequently, a moratorium was placed and these activities became illegal. A few years later, fisherman noticed that green turtles would eat fish parts that were being discarded off their boats. This situation has evolved into a lucrative business for hotels and other groups in Barbados. Hundreds of people pay to snorkel and feed the turtles. Unfortunately this activity has gotten out of hand and is now potentially having negative impacts on the turtles. During my visit, I was amazed how many boats and people were in the water feeding the turtles.
Green sea turtles (Chelonia mydas) are herbivores (plant eaters), feeding on sea grass and algae, after they return from their omnivorous (plant, invertebrate and fish eaters) pelagic life stage at about 4 years of age.
In Barbados, feeding them large quantities of fish parts has caused many of these turtles to become significantly over weight. Additionally, these turtles have become habituated to humans. Flipper tag studies in Barbados have shown that once green turtles reach a certain size class, many of them migrate to Nicaragua. It is still legal to take sea turtles for food in Nicaragua, thus these turtles are potentially easy targets.
This project was a collaboration between researchers from the University of West Indies, Ross University, the Georgia Sea Turtle Center, and the government of Barbados. The focus of our research was to capture 30 green turtles from 2 populations; a supplementally fed-with-fish group and a group that were feeding on algae and sea grass and not supplemented with fish. Turtles were captured by hand while snorkeling. A very experienced fisherman that previously captured turtles for food caught the majority of turtles and often dove 40 to 60 feet to reach them.
Blood samples were collected for plasma vitamins, minerals, lipids and other health parameters.
Physical examinations, morphometric measurements, and body weights were performed on each turtle. We have been conducting a very similar study in loggerhead sea turtles in Georgia.
One turtle had a severe boat strike injury that involved the carapace and the plastron. I was able to debride (remove dead tissue) the wound and pack it with gauze.
We then headed to the grocery store and pharmacy to get some saline for flushing the wound and guess what else-not peanut butter, yes you got it-honey. Most of you know the amazing healing properties of honey if you have visited the GSTC. It pulls debris out of the wound because of its high glucose content (hypertonic). The bee produces an enzyme found in honey called glucose oxidase which converts glucose to hydrogen peroxide. Remember the Krebs cycle when you took biochemistry and you thought you would never need that information in real life? When honey comes in contact with tissue, the pH of the honey increases from 4 to 6, which causes this enzyme to be activated. There are several other properties of honey that assist in its ability to fight infection and heal wounds.
Sincerely,
Dr. Terry Norton,
Director and Veterinarian
