Shark Attack Kills New Zealand Man

A great white shark cruises underwater in search of prey. (Image credit: Neil Hammerschlag)

A shark attack today (Feb. 27) killed a New Zealand man swimming at Muriwai Beach, a popular swimming and surfing area near Auckland.

Several sharks were involved in the attack on Adam Strange, 46, according to witnesses, though a 12- to 14-foot long (3.5- to 4.3-meter) great white shark is believed to have initiated the strike, CNN.com reported.

Eyewitness Pio Mose was fishing at the beach when the shark attack occurred. "We saw the shark fin, and next minute, boom, [it] attack him, and then blood everywhere on the water," Mose told local news website Stuff.co.nz.

Shark attacks are rare: Since 1837, just 15 fatalities in New Zealand have been attributed to sharks. The last such attack happened in 1976, according to the Herald.

Many experts agree that humans pose a much greater risk to sharks than sharks do to humans. A 2012 study, published in the journal Conservation Biology, found that shark populations have dropped 90 percent or more in some areas of the Pacific Ocean.

The study also determined that the closer humans live to shark populations, the bigger the drop in shark numbers.

Experts believe overfishing poses the greatest threat to sharks, which often die as "bycatch" in fishing nets intended for other species. Sharks have slow reproduction rates and may take more than 20 years to reach sexual maturity, so depleted populations can take decades to rebound. As a result, some states and countries now list many shark species as endangered.

Contact Marc Lallanilla at mlallanilla@techmedianetwork.com. Follow him on Twitter @MarcLallanilla. Follow LiveScience on Twitter @livescience. We're also on Facebook & Google+.

Marc Lallanilla has been a science writer and health editor at About.com and a producer with ABCNews.com. His freelance writing has appeared in the Los Angeles Times and TheWeek.com. Marc has a Master's degree in environmental planning from the University of California, Berkeley, and an undergraduate degree from the University of Texas at Austin.