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Shark attacks on Atlantic spotted dolphins near the Bahamas

Date:
August 4, 2014
Source:
Wiley
Summary:
A new analysis on failed shark attacks on the approximately 120 Atlantic spotted dolphins that are residents of the waters near Bimini, The Bahamas, has found that a total of 14 dolphins (15 percent of 92 cataloged animals) showed some sign of shark attack, and a further 15 (16 percent) exhibited scars that could not conclusively be classified as shark induced or not.

Photographs, taken on 5 May 2010, of an injury to a female S. frontalis, ID#087. A) Note the damage to left side and B) the uniform scars, on the right, just below the damaged dorsal fin, suggesting the possibility that as many as five of the shark’s teeth became embedded in the dolphin’s flesh.
Credit: Image courtesy of Wiley

A Marine Mammal Science analysis on failed shark attacks on the approximately 120 Atlantic spotted dolphins that are residents of the waters near Bimini, The Bahamas, has found that a total of 14 dolphins (15% of 92 cataloged animals) showed some sign of shark attack, and a further 15 (16%) exhibited scars that could not conclusively be classified as shark induced or not.

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Of 14 the shark attacks, there was no difference in scars or wounds between the sexes, and there was no significant difference between the location of bodily scars and wounds. No shark-related injuries were observed on the head.

It is assumed that sharks will have a greater success rate if the softer, ventral side of a dolphin is attacked.

"This type of scar analysis has never been completed for spotted dolphins. It gives us insight into the predation pressure these dolphins might face from sharks in the area," said lead author Dr. Kelly Melillo-Sweeting.


Story Source:

The above story is based on materials provided by Wiley. Note: Materials may be edited for content and length.


Journal Reference:

  1. Kelly Melillo-Sweeting, Stephen D. Turnbull, Tristan L. Guttridge. Evidence of shark attacks on Atlantic spotted dolphins (Stenella frontalis) off Bimini, The Bahamas. Marine Mammal Science, 2014; 30 (3): 1158 DOI: 10.1111/mms.12082

Cite This Page:

Wiley. "Shark attacks on Atlantic spotted dolphins near the Bahamas." ScienceDaily. ScienceDaily, 4 August 2014. <www.sciencedaily.com/releases/2014/08/140804123230.htm>.
Wiley. (2014, August 4). Shark attacks on Atlantic spotted dolphins near the Bahamas. ScienceDaily. Retrieved November 26, 2014 from www.sciencedaily.com/releases/2014/08/140804123230.htm
Wiley. "Shark attacks on Atlantic spotted dolphins near the Bahamas." ScienceDaily. www.sciencedaily.com/releases/2014/08/140804123230.htm (accessed November 26, 2014).

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