Showing posts with label swimmers. Show all posts
Showing posts with label swimmers. Show all posts

Drones Used to Control Sharks in Australia

Australians tend to be early adopters of new technology because they have inquisitive minds. Our old enemy, the shark, will always be around, so it is not surprising that drone technology is being used to solve this problem.
Shark caught by baited hook attached to a drum
It is not the buzzing sound that will scare sharks off. Drones are being used to gather visual information about where sharks are and the number swimming around, the theory being that if we know this we can be more careful.

At the moment hooks are baited on lines attached to floating drums. This method is a simple way to catch sharks, but other creatures are also caught such as dolphins. Unfortunately, sharks not tempted by the bait remain in the area. Baited hooks have warning devices in them that notify watchers on a boat when sharks take them.

This is a clumsy way to keep sharks at bay. Targeting sharks observed by drones is a better solution. Drones are far cheaper than helicopters and do a better job, going right down to sea level to collect data.
 Technology by Ty Buchanan 
 Australian Blog
            Australian Blog   Adventure Australia
sharks technology sea ocean drones dat information view images watch drums baited hooks articles news politics economics society anthropology historiography history sociology people nations country asia europe africa u.s. south america central Mediterranean eastern western interesting funny technology

People are Changing Sharks

personally, I do not fear sharks nor am I protective of them. However, they should be left alone to live their lives their way. Ecotourism is restricting their freedom to roam. Any country that can do it, is doing it to bring in the tourist dollars.
Tourist swmming close to a shark
More than eight billion people a year go seeking experiences in supposedly protected areas, which are commercialized. This is like the whole population of the planet trampling over pristine environments, because that is exactly what a high number of visitors do.

Crazy tourists actually swim with sharks. Let's face it, Man is dinner to sharks. This is the rule of things. The dangerous creatures come very close to swimmers. They are becoming domesticated. Note, many dog owners have been attacked by their pet! More, complete strangers have been mauled.

Tourists are affecting the natural selection of sharks. To attract them to tourist boats they are fed. Consequently, they have a better chance of survival. The man eaters are being selected for traits like choosing to be close to people!
Biology by Ty Buchanan
            Australian Blog   Adventure Australia
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sharks man eaters tourists visitors protected regions areas commercialized vacation

Triathletes Need to Consume Carbohydrates

This subject is topical at the moment with the Olympic Games in full swing. The triathlon is a popular sport where spectators admire the determination of athletes to push through the pain barrier and keep on going to the finish. Little work has been done on understanding how much damages is done to the body.

The half triathlon also called the intermediate or Standard distance run at the Olympics has become popular with many who just want to keep fit. Tests show significant reduction in knee extensor and flexure muscle strength at the end of an event. The ability to jump up off the ground is also reduced.

Considering dehydration and stores of carbohydrates which have been lost it is no surprise that weakness continues for some time after competing. However, dehydration was only minor in tested athletes. It seems the fat and muscle loss is the main cause. Participants in triathlons should concentrate on ingesting carbohydrates as well as fluid. Keeping blood glucose high has been found to maintain muscle force. Male athletes improved their race times by consuming carbohydrates. This was not the case for females. The reason for this is not clearly understood. Female metabolism must preserve carbohydrate stores even during strenuous exercise, but carbohydrate intake is recommended for women during an event.
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