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Pollution and its effects on the ocean
The impact of overfishing
Pollution and its effects on the ocean
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Recommended: Pollution and its effects on the ocean
Lead researcher Martin Krkosek, from the University of Alberta seid "The impact is so severe that the viability of the wild salmon populations is threatened and the probability of extinction is 100 percent," "and the only question is how long it is going to take." This is only one of the 21 different species trying to hold on to existence do to overfishing. Our oceans are being used and abused and the human race must work harder to stop overfishing our oceans. If we don't do something in the next 35 years all of our fish might be depleted, our economy and people's daily lives will change, and our oceans will be destroyed.
Destruction of top predators cause more smaller marine animals at the bottom of the food chain increased. These small
The salmon are all sterile females which are grown in contained land-based systems, therefore they will not be able to breed among themselves or with other fish. So it is unlikely that the fish will have an impact on wild populations.
Australian beaches are some of the best in the world and WA beaches are some of the best in Australia. But this may soon no longer be a view held by everyone if the WA government continues to support and allow the shark culling off Perth's major beaches. Hi I'm Maya Koentgen, a marine biologist, ecologist and fellow beach user, and I'm here to tell you why shark culling needs to stop. At the moment hundreds of innocent sharks are being caught and killed and why? Because they are simply swimming in their own homes that us humans have invaded.
Simply, overfishing depletes fish stocks. The consumer demand for fish has risen dramatically over the past decade or so, so much that fisheries are designing new and innovate ways to catch more fish, and at a faster rate to meet consumer demands. What fisheries do not realize, though, is that their removal of fish from the oceans is too great and far too fast for new fish stocks to be made. So, no mating is occurring, leaving the oceans emptier each day. If this rate continues, all fish in the ocean will be almost non-existent. Already, we are experiencing a major decline in fish population: "In 2003, a scientific report estimated that industrial fishing had reduced the number of large ocean fish to just 10 percent of their pre-industrial population. "(par.6).Overfishing brings the main consequence of decrease in the fish population. People rely on fish for survival (in some countries, fish is their only source of food), and they rely on marine life for products (goods like lipstick, petroleum jelly, make-up, etc.)
Without sharks to keep the jack and snapper populations in check, their populations flourish. When the jack and snapper populations flourish, they eat too many of the herbivorous fish. With too few herbivorous fish, algae soon overtakes the coral; out-competing it until very little, if any, remains. This is why eliminating sharks from the food chain would have devastating effects on the surrounding environment, as well as the ocean as a whole.
You're planning a vacation to Hawaii and want to do some fishing while here. If you're planning to hop on a charter sport fishing boat or some other commercial offshore excursion, you don't have anything to worry about except for showing up at the dock on time.
Blue whales, also known as (Balaenoptera musculus), are considered one of the largest animals today (NOAA). A blue whale can grow up to “80- 100 feet in length and may weigh up to 200 tons” (World Wild Life).
In the last 30 years since the lionfish first appeared in the Atlantic Ocean, they have become a destructive nuisance. The lionfish species which are native to the Pacific Rim and Indian Oceans are now invading the Atlantic and Caribbean Oceans, eating any fish that can fit into it's mouth. Scientists don’t believe the invasion will ever be completely eradicated, however if the problem is recognized there are steps that can be taken to try and contain this invasion at a manageable level. Through education, fishing or hunting of the species and by teaching other species to eat the lionfish, there is hope humans can gain control over these invasive creatures.
In the documentary Blackfish, the director and writer Garbriela Cowperthwaite (2013) tackles the topic of animal captivity. Within the film Cowperthwaite specifically examines the captivity of orcas at Seaworld. Cowperthwaite's film argues against Seaworld's procedures regarding orcas. Garbriela Cowperthwaite effectively persuades the audience by providing video evidence and including varying interviews.
Demand, revenue, cost, and profit are the driving forces behind any economy. This notion is taught to most students in grade school and will carry on through the rest of their lives helping them make the most educated decisions they can. Logically, the greater the demand for something, the greater the profit will be. Whaling used to be a sizable part of the economy, due to the innumerable uses of a whale’s by-products, and consequently, there was a substantial profit margin. Presently, the largest demand for whaling is by Japan, Norway, and Iceland all of whom partake in whaling for either commercial or “research” purposes. However, the demand and revenue from whaling do not outweigh the costs that have tolled on the species. This practice is largely scrutinized by conservationists who believe that commercial whaling is going to bring some species of whales to extinction. The current demand for whaling is incredibly low; however, it is still necessary to continue the ban on commercial whaling.
“Overfishing occurs when more fish are caught than the population can replace through natural reproduction”. CITATION
Imagine a world where there are no animals anywhere. There are still the ordinary cows, pigs, cats, dogs, but there is not a single tiger or rhinoceros. People all around the world have been killing animals for thousands of years and they need to stop and obey the laws. Make your voice heard for the animals; they can’t speak for themselves so we need to do it for them. Other reasons on why animals are getting put on the endangered species list and or going extinct: habitat intrusion, pet trade, climate change, and disease. Please help to save the animals or they won’t be here any longer.
“Earth is losing mammal species 20 to 100 times the rate of the past. Extinctions are happening so fast, they could rival the event that killed the dinosaurs in as little as 250 years,” says sarah Kaplan of the Washington Post. Scientists are in agreement, we are teetering on the sixth mass extinction and humans are the cause of this round. Due to the destruction of forests, pollution of the ocean and freshwater sources alike, over hunting, over fishing, and mass amounts of CO2 produced by the human population we are destroying the earth that sustains us.
Yet over the past few decades, fish populations have been decreasing year after year. YES, WE ARE OVERFISHING OUR SEAS. Overfishing is when more fish are caught than the population can replace through natural reproduction. For most of human history, overfishing occurred through small tiny boats of fishing fleets. But in the 1900s new technology changed fishing techniques. Bigger and advanced nets and radar allowed fishing to be more quick, efficient and of more quantity. All of a sudden, fishing became a huge commercial resource. So for a while, things were going great, enough food source and lots of money.
New studies are suggesting that the past sustainability levels for cod fishing will reduce the future of managing cod populations due to the constant warming
Unless the current situation improves, stocks of all organisms that are currently fished for food are predicted to collapse drastically by 2048 (WWF 2.) Briggs emphasizes that over-fishing “has induced population collapses in many species. So instead of having less than a hundred species at risk, as was the case some 30-40 years ago, there are now a thousand or more