The Dorsal Fin

The Australian is reporting that Fisheries Minister Norman Moore has ruled out any cull of white sharks (Carcharodon carcharias) in response to three fatal shark attacks in Western Australia. Instead a newly formed response unit will look examine the effectiveness of shark nets, correlations between weather conditions and shark attacks, and whether or not protection laws have resulted in an increase in the number of the species.

Moore said that his department is trying to balance protecting the species and providing as much information about the probability of shark attacks when they go swimming. Additionally, the response unit will assess the effectiveness of the SMS shark alert system.

The Conversation has an interesting article on the history of shark nets in Australia. The article, written by Christopher Neff, focuses primarily on the use of shark nets in the waters of New South Wales and gives a bit of history about how the nets first came to be. Neff also touches on the politics associated with the nets and the effectiveness of them in protecting humans from shark attacks.

Neff questions the effectiveness of shark nets noting that from 1937-2008 of the recorded shark attacks in New South Wales, 63% of them occurred at beaches using shark nets. He also points out that only one fatal attack has occurred at a netted beach in the state, but cautions that associating low fatality rates with the nets might be questionable, as there was a three year period in which the nets were removed and no fatalities were reported.

While the Neff certainly seems to lean in the direction of opposing the nets he admits that the issue of Australia’s shark nets is not a simple matter. Neff stresses the need for public safety measures and points out that the consequences from shark attacks can be “terrible.” However, he notes that public dialog and education are necessary to move away from outdated tactics that are leaving Australia behind.

You can check Neff’s full article at The Conversation.

Shark nets in Queensland will be fitted with “pingers” designed to alert migrating whales to the presence of shark nets, according to the Sydney Morning Herald. The move marks an attempt to help prevent whales from becoming entangled in the nets. In 2009, six whales were trapped in the shark nets, which have stirred up controversy in the past. All six of the whales trapped last year were successfully freed.

The shark nets are already equipped with pingers designed to alert dolphins. The whale pingers will a “longer and louder noise” as compared to the dolphin pingers, according to Primary Industries Minister Tim Mulherin, who went on to note that the pingers are designed only to alert the whales of the presence of the nets not to scare them away.

Multiple prototypes will be fitted to the nets this week as a test run. The goal is to have the alarms on all the shark nets by August when younger whales are more likely to come in close proximity to the nets.

Apparently, the term "monster shark" is hip these days. Another story of a supposedly “monster shark” has hit the news media less than a week after the story of a “monster shark” off the Queensland coast caused a media storm of it own.

A Daily Telegraph article titled, Monster great white shark caught in South Africa not yet fully grown, reports about another supposed “monster.” This time the “monster” is unfortunately a white shark that died as a result of being entangled in a shark net on August 31, 2009 near Mossel Bay (Western Cape, South Africa). According to the report, the shark was an adolescent female measuring 4.3m (14′) in length. Those familiar with white sharks would hardly consider this to be an exceptionally large white shark, but for some reason some in the media have deemed it a “monster shark.” For some reason, The Daily Telegraph is reporting that the news that this is an adolescent shark is “frightening,” despite the fact that white sharks are known to grow considerably larger than the shark involved in this story. In fact, a much larger white shark was caught in the same area in 2002, according to the report. No word on whether or not that white shark met the requirements to be classified as a “monster.” Then again, “monster shark” might not have been a cool buzzword in the media back in 2002.

Some of the media outlets out there need to come back to Earth, because they are clearly way over the top, when it comes to these “monster shark” stories.

In related news, IOL News, is reporting that the dissection of the shark caught in Mossel Bay has been filmed by Windfall Films for the UK documentary series, Inside Nature’s Giants.

The Brisbane Times is reporting that the Queensland government will be spending $125,000 on a five-year program to tag and monitor bull, tiger, and white sharks in an effort to "reduce the risk of attacks." Acoustic tags will be used to report data to monitoring stations when tagged sharks are nearby. Shark control program manager, Tony Ham, said that they expected to tag 150 sharks in three years (which seems like an odd statement, considering that the article reports the duration of the study to be five years).

In addition to the shark monitoring aspect, the Queensland government will also invest in new and improved acoustic alarms to alert whales and dolphins of the existence of shark nets." The new alarms will use a longer lower pitch signal at a louder volume to give cetaceans a more advanced warning of the nets. The shark nets have come under criticism due to whales and other marine life becoming entangled in them.