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Lionfish invasion essay
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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.
The lionfish not only grow at an alarming rate, but they are able to reproduce at an alarming rate in non-native oceans. An adult lionfish will grow between 12-15 inches in length in their native habitat, but have reported to grow at an alarming rate and have been caught at 18 inches and all the way up to 20 inches off the coast of Florida. This species re-produces so quickly due to the fact that the female lionfish will produce to gelatinous egg packets of 12,000 to 15,000 eggs a piece. These eggs packets will break apart and drift in the current, allowing these eggs to spread apart extremely quickly. These egg masses can float and drift apart for about 25 days before tiny microscopic lionfish larvae are born (Lionfish – Pterois volitans). These larvae will reach full maturity in less than a year, allowing them to reproduce and keep the cycle of the invasion going. In warmer climate waters such as the Atlantic and Caribbean ocean a lionfish is able to spawn every four days (Lionfish – Pterois volitans). Since the nutrient rich waters of these oceans allow the lionfish to n...
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...ar completely gaining control over the problem or solving it.
Humans are just starting to understand exactly how this invasion is starting to affect not only our oceans, but the delicate reef life that is held inside them. Some countries throughout the affected are starting to see some promising results with the decrease of lionfish and rejuvenation of reef life. Our oceans are no where near out of the woods yet, and this invasion has not even come anywhere close to the end. This problem is one that humans created and can only be kept in check by human intervention. It's extremely important that everyone is aware not only about the lionfish invasion, but also aware on the destructive consequences that surround it. Through various methods between public education, fishing / hunting removal and working with local predators, our ocean standing a chance of surviving.
The nonnative species of the lionfish, living in tropical waters to depths far below is an unseen threat by first glance. Truth behold, this fish is a serious pest since the first sighting in Dania Beach back in the 1980s. Presently, it has grown out of its bounds and causes harm not only to the sea life but trouble to humans as well. An unmatched appetite with a fast and large reproduction to spawn its species in a matter of only a short time, makes this invasive fish at the top of a sounding alarm. Clever biological adaptations have made this fish a tough fighter to the ecosystem and only in the past few years have we learned to take effective measures to control their population to save our coral reefs.
There’s No Real Good Guy In the movie, “Blackfish” we are exposed to the fact that the way orcas are treated at SeaWorld is worse than we are lead to believe. We see how they are forced to swim in tiny pools and how they can only be fed if they preform well. After seeing this it makes you feel like the only way to help these poor creatures is to jump on the animal activist wagon and to free all the whales like in “Free Willy”. But is that really the right way to go?
Orca whales do not like to be taken from their family, held captive for many decades and put with other whales that they do not know. No other living organism on this planet would like to be put through the same thing. Orca whales are highly social animals, they are very intelligent, and are very emotional. If they are kept away from other whales, fed intermittently and received little attention from staff makes them get very emotional and can lead to death of people and the whales. Orca whales should not be held captive; they are beautiful creatures that are not great for people’s amusement and if they are treated poorly, they will act poorly.
Lionfish are not currently listed as threatened in their native range. However, the increase in pollution in coral reefs can negatively affect the lionfish's primary food sources (NOAA, 2011). If lionfish are unable to adapt to declines in their prey species, their numbers will decrease. Although between the increasing reef pollution and the Lionfish’s voracious appetite reef populations will more than likely be damaged beyond repair, they may even be close to elimination by the time the Lionfish population actually declines (Albins, 2013).
One of the governments main reasons for culling the sharks is because they are coming in too close to the shores and becoming a potential threat to swimmers. But why is this happening? This is due to a change in shark feeding habits, but because they are eating more human of course not! Rather because us humans are over fishing and eliminating the fish/food sources of which sharks normally feed on. This is forcing sharks to come in closer to find food. Us as humans have forced sharks to come in closer and are now killing sharks because of our a...
Overfishing is defined as a form of overexploitation where fish stocks are brought down to unacceptable levels. In the UN Food and Agriculture Organization’s 2 yearly report (SOFIA), it states how over half of the fish stocks, worldwide, are fully exploited. Other research has shown it only takes 10-15 years of industrial fishing to obliterate a tenth of the intended specie. Overfishing causes a ripple effect that hurts the entire ecosystem. The balance of chain depends largely on the interaction between the predator and the prey. For example, if the larger fish are removed than its prey begins to overpopulate, due to the lack of population control. The balance in the oceans are a urgent problem, around 90% of predatory fish stocks are depleted. The ripples can extend even further to land creatures like
As the pistol shrimp uses its powerful snapping craw as a weapon to hunt, it makes such a noise that it can even alter the sound transmissions of submarines. (BBCWorldwide, 2009) In the video clip “Pistol shrimp sonic weapon” it shows how this snapping shrimp uses its sonic weapon, which is a large claw that snaps to releasing bubbles. (BBCWorldwide, 2009) These bubbles are shot at the shrimp’s prey at such temperature that when their released they can reach the sun’s temperature for a instant. (BBCWorldwide, 2009) Although this pistol shrimp has a astonishing feature, its important to analysis the way this snapping shrimp uses its claw to create a load snap noise through cavitation bubbles and the fundamentals behind its claw regrowth from
Two friends go out for lunch to their usual favorite sushi restaurant. They are seated and given their menus, they knew they were going to get their usual but noticed the prices have increased. Prices have gone up, and some replaced with imitation fish meat, since the last time they ate there. What might have caused this? Due the demand of fish, the price for them also increases. It’s a simple supply and demand logic, but not only is it due to the demand for these fish, it can also be due to their rareness. Over-fishing can cause what is rare and which fish species isn’t. Commercial fishing may cause fish species to go extinct, or bring in new types of fish to take the place of the other fish. In tuna we
Our increased appetite for coastal area living, a preference that will likely develop as global temperatures increase, coupled with a rise in seaborne trade and transport, will all contribute to the shaping of future tropical marine ecosystems. Between the years of 1980 and 2000 seaborne trade was shown to increase by 37%, and has continued steadily ever since (Peters 2001). The global mean of ocean transportation is widely acknowledged as a dominant vector regarding invasive species introduction (Carlton 1985), by means of the translocation of larvae and marine microorganisms. One investigation conservatively reported ballast water containing 8 different animal phyla and 5 protist phyla consisting of a total of 81 species (Chu et al., 1997). It is also suggested that at any one moment in time, 10,000 species are transported through ballast water globally (Carlton 1999). An example of a successful invasive transfer via ballast water is the invasion of the comb jelly, Mnemiopsis leidyi, which invaded the Caspian Sea in 1982 (Ivanov et al., 2000). Another ballast water mediated species in recent times is the Pacific brittle star species Ophiactis savignyi, which has now successfully integrated into the tropical West Atlantic (Roy and Sponer 2002). Various management strategies have been manufactured to prevent these ballast tank related problems,
Salmon are in huge demand all over the world. In 2014, over 146,000 were caught statewide. Even though it may seem as though catching all of these salmon will cause them to go endangered, they still thrive. There are many ways that humans also contribute to keeping the salmon population high. We raise them ourselves and also help out the ones in the wild. One of the ways we do this is by creating fish ladders. Fish ladders are like stairs underwater that fish like salmon can use to get over an obstacle that is in the way. Salmon can travel up to 1,000 miles and can not be stopped by different things such as water falls for dams. These ladders have helped them out tremendously.
A documentary is an informative film that aims to position readers to accept one version of the events or topics expressed. All documentaries posses the ability biased and present an altered version of reality to persuade audience positioning. ‘Blackfish’ is a captivating and inspired documentary released in 2013 concerning the inhumane captivity and domestication of Orcas at SeaWorld for pecuniary advantage. The film, directed by Gabriella Cowperthwaite positions viewers to adopt a dominant reading position on the topic of whale subjugation. The documentary utilises techniques such as expert verification, emotive language and the humanisation of whales to position dominant viewers to accept the ideology that captivity is deleterious
While all of these solutions can help keep lionfish populations in check, many scientists doubt they will ever be fully eradicated (Cote et al., 2013; Edwards et al., 2014; S. Green, 2014; Morell, 2010). This fate should inspire stricter trade legislation of exotic species along with increased public awareness efforts (Cote et al., 2013). It is an effective example that not all environmental damage is reversible.
In the epoch of the Anthropocene, humankind is drastically changing the dynamic of life on Earth. Our oceans, in particular, face great danger. Technological advancements in fisheries is continuously increasing efficiency, making it easier to catch vast amounts of fish in short amounts of time. But, unfortunately, we are catching more than just the targeted species. As a result of technological advances, bycatch has emerged as a huge problem in fisheries around the world. We are depleting the oceans of the life that sustains us. According to the U.S. National Bycatch Report, in the United States alone, nearly two billion pounds of bycatch have been caught by the fishing industry (Karp, Desfosse & Brooke 2011). The National Marine Fisheries
Goldfish are typically trouble-free pets for all the family to enjoy. Goldfish are one of the easiest of all fish to keep, but if they are to be kept in an aquarium you must remember that they are totally dependent on you for their welfare. A well cared for goldfish can live for eight years or longer.
Bowermaster, Jon. Oceans: The Threats to Our Seas and What You Can Do to Turn the Tide: A Participant Media Guide. New York: PublicAffairs, 2010. Print.