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Essay about the nile perch
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The following paper is on the Nile perch, it’s history, it’s introduction to the Lake Victoria, why it was introduced to Lake Victoria and the pros and cons on its introduction, and is their anything trying to stop any negative impacts.
The Nile perch also known as Lates niloticus (Lowe), a very popular fish in Africa (Lowe 2000). In 1980, a mass increase in the population of the Nile perch occurred., Tthis increase in the population fish caused other aquatic life to in the lake to take a dramaticallydramaticly decrease in population (Cite). The Nile perch is a freshwater fish of the Latidae family. They can reach up to 6 feet long, and weigh over 500 pounds. This fish dramatically boosted the fishing industry.
In the 1950s’ the Nile perch was introduced into Lake Victoria. The introduction of this fish caused nearly 200 endemic species in Africa to go extinct (Cite). 25 years later the population of this fish boomed. The Nile perch feeds off of fishes, insects, crustacea, and
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molluscs. When fully grown about 95% of their meal consists of haplochromine cichlids. The haplochromine cichlid is a native fish to Lake Victoria. This fish did both some good and some bad. But, why did The Nile perch get introduced? The reason the Nile perch was introduced to Lake Victoria was to help the fishing community boom.
The Nile perch became an economic disaster. To store Nile perch properly they need to be smoked due to their high fat content. This caused extra firewood to be cut down and resulted into deforestation. Nile perch has disrupted the food web in Lake Victoria. The fish also contained high levels of salmonella which caused hundreds illnesses in the area. The fish left a impact on the fishing community. As the Nile perch population grew and other native fish population went down it affect certain fishermen. Since this fish was growing to such great sizes, more fishermen were needed, thus creating more jobs. Although it did help other get jobs it cost more to send fishermen out because of the size of boat needs to be crafted and rods and nets. All in all this fish had many consequences with its introduction. For all the negatives caused, is there anything trying to prevent these
negatives? With this fish being exported between three different countries safety and health precautions needed to be taken. Since this fish very popular for food the European Commission announced all Nile perch imports from any region is to be tested for bacteriological examination. This helped reduce illnesses and sickness from consuming unprepared Nile perch. The introduction of the Nile perch caused many problems and brought some benefits with it. The Nile perch gave fishermen a better pay and gave young fishermen a chance to start their future career. In conclusion, this fish has made a bad impact on the environment.
In this entertaining, search into global fish hatcheries, New York Times writer Paul Greenberg investigates our historical connection with the ever changing ocean and the wild fish within it. In the beginning of the book Paul is telling his childhood fishing stories to his friends, that night Paul discovers that that four fish dominate the world’s seafood markets in which are salmon, tuna, cod, and bass. He tries to figure out why this is and the only logical answer he could come up with is that four epochal shifts caused theses wild fish population to diminish. History shows that four epochal shifts happen within fifteen years causing certain fish species populations to diminish. He discovers for each of the four fish why this happened to
Since three-forth of the world is composed of bodies of water, it’s natural that a great number of people rely on fishing for their livelyhood or just for their recreation needs. There are numerous of fish species swimming under the lakes, seas, ponds, and rivers. Most anglers consider fishing as the delight in their purpose-driven life, a sport, as they say.
Larabee, John, and Richard Price. "Tide of Troubles has Fish Industry Reeling/ Crisis Caused by Pollution, Development, Over-Fishing." USA Today 10 Mar. 1994: 9A
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 species. Overfishing causes a ripple effect that hurts the entire ecosystem. The balance of the chain depends largely on the interaction between the predator and the prey.
Because of the BP oil spill many of the working industries in the Gulf of Mexico were highly affected. Since a large portion of the marine life was affected a number of the oil fishing industries have been shut down. This is because the oil spill has caused mutations to start occurring in the water, thus creating problems for the future species. Fishing industries have had to shut down to prevent harm to any of their buyers. The lack of business success has ...
Overfishing is a major problem in economy today. The practices of fishing too much or too often result in a decrease of the fish population. Constant removal of fish from the oceans (fishing) accounts for both adult and baby fish. With the consistent decrease in adult fish, mating becomes more difficult or even impossible, resulting in an overall lack of fish in the oceans. Pepijn Koster defines overfishing as, "Overfishing can be defined in a number of ways. However, everything comes down to one simple point: Catching too much fish for the system to support leads to an overall degradation to the system. Overfishing is a non-sustainable use of the oceans." (par.1). When fish stocks cannot be replenished faster than they are being depleted, a reduction in fish population occurs, which is what is referred to as overfishing.
Overfishing may have some benefits to it, but does it out way the negatives? By fulfilling our demand we can wipe out our whole oceans! Not just the fish, but water mammals too. Sure it can create jobs, but as what cost? It can help bring up our economy, but at the same time it can bring it down with many fish companies closing down due to lack of profit. Fish is a great source of nutrients, but too much can kill you! In other words, fish can be both beneficial and harmful to not only humans, but everyone and everything surrounding fish. There are three things people can do to help with overfishing, the first thing is to be aware of what you are eating. Is the fish on the fear of extinction list? Also asking yourself is the fish you’re about to eat really the fish you intend to eat? Another thing to ask is, was it shipped over seas? If it was it doesn’t benefit anyone, it won’t help the economy or you. Many fish shipped from a long ways creates pollution and may have lost its nutrients value from the long voyage. One last thing to do is if you see a sewer with a sign leading to the ocean, try not to leave trash near it, or better yet don’t litter at all! All the litter left out on streets or near sewers can cause pollution in oceans, lakes, and rivers which is very harmful for marine life. You can still enjoy fish, but not at such a high demand as
Long-term survival of a species depends on its ability to adapt to changing environmental conditions (Murphy, 1994). Genetic diversity within a species, which has taken 3.5 billion years to evolve, makes adaptations to these changing environments possible. Unfortunately, the rate of extinction of genetically diverse organisms is rapidly increasing, thus reducing this needed biodiversity, largely due to the human impacts of development and expansion. What was an average of one extinction per year before is now one extinction per hour and extinct species numbers are expected to reach approximately one million by the year 2000 (WWW site, Bio 65). As a result governmental and societal action must be taken immediately!
The rainbow trout are found to be remarkable species. Evidence of their ability to adapt and to use their traits have been evidently advantageous, increasing their ability to survive during development and migration. It is evident they are not able to reproduce without spawning, and without migration they cannot spawn. This concludes that as a result of evolution, their environmental instincts and physical maturation, they have been able to adapt. Regardless of natural selection and predators, it is evident that because of their traits that have been able to survive the longest.
When researching the population decline of amphibians as a global issue, it is evident that there have been drastic changes in the past 30 years. Mike Lannoo from the U.S. Declining Amphibian Task Force says that there have been significant losses in amphibian populations for an extensive period of time (No Single Reason, 1999). Stuart et al. (2004) stated that according to scientists at the International Union for Conservation of Nature (IUCN), at least 427 species, roughly 7.4%, are at a dangerously high risk of extinction (Kaylor, 2006). The problem of amphibian decline cannot be linked directly to one single cause (No Single Reason, 1999). Instead, scientists have related the decline to disease, habitat loss, changes in climate, and pollution (Hayes, Falso, Gallipeau, Stice, 2010; Brooks et al., 2002; Dunson et al., 1992). It is concluded that many of these factors are related to and possibly caused by human interaction (McCallum, 2007). The declines could be caused by pathogens, climate change, or wildlife toxicology, says Dr. Ashley Mattoon from the Worldwatch Institute (Kirby, 2000).
Overfishing is the most major problem related to oceans, but it is also the most overlooked. Fishing has been going on for thousands of years, and fish have always been seen as a renewable resource, that would replenish itself forever for our benefit. But around the world there is evidence that fish are not recove...
Water salinity up to about 5‰ is tolerable by common carp. However, based on the occurrence of common carp in in brackish-water estuaries, backwaters, and bays, there are some reports on the common carp living in brackish-water marshes with salinities up to 14 ppt in southern France and on capturing common carp in waters with salinities as high as 17.6 ppt. in USA. Even the best growth of common carp is obtained when water temperature ranges between 23 °C and 30 °C, fish can withstand higher water temperatures and can survive cold winter periods.
Non-native species are being taken from other countries and are damaging other native species’ habitats. These non-native species are destroying boats, docks, and other water machinery vehicles. Not only are non-native species eradicating boats, docks and water machinery vehicles they are also killing native species’ habitats. They can also harm farmland which can stop food from being created. To prevent this from happening more, we just need to make sure
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
Lake Victoria, the biggest of Africa's great lakes, dripped by a vertical inch a day for much of last year. The receding of these lakes, along with a change in temperature of the water, will now deplete the fish stock. As the fish sources decrease, this limits the amount of fish caught and sold by fishermen. When the regular food source is strained, Africans may turn to hunting wild game, which puts pressure on previously endangered species.... ...