Total global shark mortality

According to David Whysharksmatter Shiffman "A new study has estimated the total global shark mortality for the first time, and came up with a figure of between 63 and 273 million sharks a year. For more details on the origin and importance of this estimate, please see http://links.causes.com/s/clI60k?r=Q9FJ

"Dive" magazine article about diving with sharks

The March 2013 issue of "Dive" magazine has a good article about diving with sharks. It can be found at http://digital.divemagazine.co.uk/ or
http://digital.divemagazine.co.uk/Portal/Default.aspx?Id=1

Electronic Shark Defense System

A new shark deterrent is now available for divers and other water users. ESDS is an effective, tested technology that repels dangerous sharks. It is a compact 2.65 x 2.3 x 1.15 inches & lightweight at approx. 7oz. It comes with a built-in battery that lasts nine hours in the water and can be re-charged. It automatically turns itself on in the water and easily powers through the roughest ocean conditions. Divers themselves can only receive a shock from the unit if they happen to touch 2 contact points simultaneously. Visit https://www.esdshawaii.com/ to view 3½ minutes of video footage about the device. Online purchases can be made via https://www.esdshawaii.com/shop. Specifications are:

Depth:            150 feet maximum

Dimensions:        Approximately 2.65”W X 2.30”H X 1.15”L (enclosure only)

Weight:            Approximately 7 oz.

Power:            Internal 3.7V Li-ion battery

Battery Charger:    6 VDC,  1.0 Amp wall transformer

Charging Time:        Approximately 7 hours (new battery, varies over time)

Operational Time:    9 hours (in water)

Output:            120V to 200V pulsed proprietary wave form

Electrodes:        2 electrodes, each approximately 1” X 1” stainless steel mesh

SHARK PHOTOS

A photo that Sam Cahir took looking down the throat of a mako shark at the Neptune Islands can be found at http://www.adelaidenow.com.au/gallery-e6frea6u-1226503105233?page=7 . There are 10 shark photos in total. Neither the newspaper nor the web page indicates that Sam was in the safety of a cage at the time of his 2-hour ordeal.

Recent shark sighting at Streaky Bay

My old (recent) boss was out fishing at Streaky Bay recently when this shark swam between their boat and a neighbouring one. The shark appears to be much bigger than the other boat.

A diver swimming with a great white

Great film footage of a diver swimming with a great white can be found at http://www.youtube.com/watch?v=f59UG-Qz-I4&feature=player_embedded

The naming of the Great White Shark

Wikipedia in regard to the naming of the Great White:

Carolus Linnaeus (a very interesting Swedish botanist) gave the great white shark its first scientific name, Squalus carcharias, in 1758. Sir Andrew Smith gave it the generic name Carcharodon in 1833, and in 1873, the generic name was identified with Linnaeus’ specific name and the current scientific name Carcharodon carcharias was finalised. Carcharodon comes from the Greek words karcharos, which means sharp or jagged, and odous, which means tooth.