Iguanas within the Bahamas are getting a candy tooth due to grapes fed to them ‘ecotourists’
Scientists say the candy snacks are elevating the rock iguanas’ blood sugar and so they do not but know the results this might have for this endangered species.
Day by day, dozens of speedboats land on the white sandy seashores of the Exumas Islands. The guests entice the Cyclura cychlura or Northern Bahamian rock iguanas, which rush to the boats with the expectation of being fed grapes from the tip of skewers.
These reptiles are categorized, relying on the subspecies, from “weak to “endangered”.
A group of American researchers has studied the impact of this repeated and unnatural feeding on the animals’ metabolism. They in contrast the blood glucose ranges of iguanas with these of animals from the identical species residing in close by islets the place the rocky panorama prevents vacationers from visiting.
The outcomes of their analysis on 4 populations of iguanas (two fed with grapes, two fed with pure meals) are clear. There have been “important results” on iguanas fed by the ecotourists – together with a lot greater blood glucose ranges.
To make sure that the grapes actually the reason for the excessive blood sugar ranges, they replicated the experiment within the laboratory on frequent inexperienced iguanas, a non-protected species. The outcomes had been similar.
Are the grapes impacting the iguanas’ well being?
The researchers themselves admit they do not know if this variation in metabolism is inherently dangerous for the lizards’ well being. However “we might name it diabetes in the event that they had been people or mice,” Susannah French, lead creator of the examine, instructed AFP.
And the researchers have already famous physiological results, significantly on the animals’ poo. When the iguanas eat their pure weight-reduction plan of vegetation, it’s formed like a “Cuban cigar, a bunch of rolled-up leaves.” But it surely turns into rather more liquid once they eat the fruit supplied by guests to the islands.
A earlier examine had already proven that iguanas residing on seashores the place they’re fed are bigger, heavier and develop quicker than their counterparts not uncovered to vacationers.
The researchers insist that their examine is just not a condemnation of tourism. They wish to work with tour operators within the Bahamas to “discover a extra sustainable plan,” says Charles Knapp, one other of the examine’s authors. Among the many potential options, they recommend the islands might regulate the variety of guests or “use of one other sort of meals”.