Angela Lang Place of Publication:
For over 70 years, shark nets have been protecting Australian swimmers from a death almost too awful to contemplate. Since their introduction innot one fatal shark attack has been recorded at beaches where nets have been installed.
But a growing body of scientific evidence suggests that shark nets remove more than just big-fanged predators from our beaches.
Protected species such as whales, dolphins and manta rays also get trapped in these nets. Ironically, another protected species, the majestic but terrifying Great White Shark is regularly caught in shark nets in significant numbers.
No one really knows what removing such a high level predator from the marine food chain will do. Shark nets versus shark-proof enclosures In Australia, we have shark nets and shark-proof enclosures, and the distinction is often confusing.
Shark nets are used on open ocean beaches, and are simply a straight, rectangular piece of net suspended in the water column between buoys. The mesh holes are 50cm wide, small enough to entangle sharks and other large marine species, while leaving smaller fish alone.
Shark net arrangements used on some Australian beaches entangle a variety of large marine species Most shark nets stretch about metres along the beach and down to a depth of six metres. Lines of torpedo floats at the top and sinkers at the bottom keep the net upright in the water. They are anchored at either end, usually about metres from shore in roughly 10 metres of water.
The nets are not intended to form a complete barrier, and sharks can still get through. The Queensland Shark Control Program uses another technique in addition to nets: In a typical 20km stretch of coastal surf beach, a strip of net will be set up every couple of kilometres along the beach.
A shark attack is an attack on a human by a grupobittia.com year, around 80 unprovoked attacks are reported worldwide. Despite their relative rarity, many people fear shark attacks after occasional serial attacks, such as the Jersey Shore shark attacks of , and horror fiction and films such as the Jaws series. Out of more than shark . Shark Stewards mission is to restore ocean health by saving sharks from overfishing and the shark fin trade, and protecting critical marine habitat through the establishment of marine protected areas and shark sanctuaries. - Introduction The blue whale (Balaenoptera musculus) is a species of baleen whale known as the largest animal on Earth. They can grow to be over feet long and can weigh up to tons. Blue whales are found in all oceans and can occupy a wide variety of habitats, from pelagic environments to offshore environments (Clapham et al. ).
And like all beach constructions, they can also cause major sand erosion. Now certain sections of the public and conservation groups such as the WWF World Wide Fund for Nature are calling for shark nets the ones used at ocean beaches to be completely removed.
But how much more risk would we face without the nets? What if they were removed, would governments face big liability claims if a shark attack were to then occur on a previously protected beach?
Just imagine the brochures: Not ideal marketing material to sell your slice of paradise! The theory behind the net is quite simple: The sharks are caught in the net by their fins and drown, reducing the risk of attacks.
Since then, there have been no deaths associated with sharks. However how the nets are affecting shark populations is unknown. While theories about declining catch rates are yet to be confirmed much also remains to be learned about the territorial behaviour of sharks.
The four most potentially dangerous sharks White Shark Responsible for most cool water attacks, particularly on divers Bull Shark.i. New legislative issues that might arise in exporting, transit, and consumer countries; ii.
Issues pertaining to chain of custody, including where in the trade chain it is considered essential to be able to identify the products in trade; iii. Issues pertaining to legality of acquisition and introduction from the sea; iv.
Recreational fishing for sharks is popular in many places like the United States, Australia, New Zealand, and the United Kingdom (Babcock ). Several species are targeted by recreational fishermen, such as blue sharks, shortfin mako, porbeagle, and thresher sharks (Camhi et al.
Among some of the most wasteful reasons to hunt in the world I d have to say that besides the killing of elephants for their tusks, this is on top of the list for one of the worst reasons a blue shark is killed.
And sadly enough the United States is one of the top countries to blame. In Haw. What are the intricacies of shark nets and is the recent push to remove shark nets more an issue of public liability than safety? For over 70 years, shark nets have been protecting Australian. U.S.
states and territories are recognizing the importance of this issue with bills passed in the Northern Marian Islands, Guam, Washington state, Oregon, Hawaii, and many more in the works.
Many shark fin trade bans have simplified . A shark attack is an attack on a human by a grupobittia.com year, around 80 unprovoked attacks are reported worldwide.
Despite their relative rarity, many people fear shark attacks after occasional serial attacks, such as the Jersey Shore shark attacks of , and horror fiction and films such as the Jaws series.
Out of more than shark .