Dead Perches Lab

This paper is going to discuss the Nile Perch scientifically known as the Lates niloticus. This type of fish is most commonly found in Lake Victoria or they can sometimes be found in the Nile river in Egypt ( Lipton, 2003) (Schofield, 2012). The Nile Perch is a large fish it’s about 6 feet long and weighs 300 pounds ( The editors of Encyclopedia Britannica, 2008). This fish is also known by several different names one including the Victorian Perch due to its location in Lake Victoria.

In summary, there are many different factors that contribute to the health of the Susquehanna River. The factors include the pH, temperature, phosphate, nitrate and dissolved oxygen levels. Another factor is the wildlife living in and around the water. A healthy pH level is from five to eight. The tested level was within this range! The temperature was also at a good level because it was cold enough to have the healthy level of dissolved oxygen. The dissolved oxygen level was about nine. The nitrate levels were excellent, but the phosphate levels were just good because they were slightly above where they are supposed to be. Also, by analyzing the types of macroinvertebrates in the river, the level of pollution can be evaluated. The

Last but not least, the Nile Perch also caused a lot of deforestation in the habitat around it. You might be wondering what a water creature has to do with deforestation. Well, this is because a lot of wood is required to soak the Nile Perch. Since there were a lot of these fish at the lake, it was the most common meal, for the local people. In order to prepare this fish properly you need large amounts of wood. These led to massive amounts of vegetation loss, and this also harmed the biodiversity of the ecosystem.

The purpose this issue became of great significance these years is that the water pollution can not only poison the creatures in the water. Also affect the quality of Biodiversity declines

The average temperature was approximately 9.67 C. The temperature of the water is significantly impacted by the amount of cool wind the area receives, the amount of sunlight, and the time of year in which the temperature was measured. These factors allow for the water to maintain significantly cooler throughout the year. Also affected by wind are the velocity and rate of flow of the stream. The average velocity is 0.29 meters per second (m/s) and the rate of flow is 41.30 meters3 per second (m3/s). The velocity and rate of flow in the area are higher because it was closer to the dam and also contained areas that were more elevated than some. Sunlight, on the other hand, also affected the turbidity and the photic zone. The turbidity of the stream was 26.50 centimeters (0.265 meters), while the photic zone was 0.42 meters. The photic zone is the depth of the water that receives the greatest amount of sunlight that is then used to carry out photosynthesis. Turbidity is an indicator of how much algae or sediments is present in a lake because it affects the visibility of the water. The cloudiness of the water is caused by the dissolved particles scattering light molecules within the water. The average depth of the water is 9.50 meters and the average width of the water is 14.99 meters. The measurements of the width and depth are not affected by anything. According to Trout

The purpose of this study was to see whether or not seasons would affect the abundance and size of flatfish species. The hypothesis presented throughout the experiment was that seasonal effect would be present in the flatfishes that were being tested. This hypothesis was made because of the fact that there is a difference in spawning around the year within flatfish species.

This report is based upon the collected data from scientific tests and different data collection experiments, these diverse range of observations helped in determining the health of the river and catchment as a whole. The experiments tested a range of variables, some including; the levels of nitrates, phosphates, temperature of water, pH levels, turbidity of water and dissolved solids. The collection of water and recordings of microorganisms was examined and also recorded. As well as these scientific tests, simple recordings were also taken of the surrounding area and the amounts of rubbish and infrastructure that could be seen. The tests conducted in the river system occurred on the 24th of May 2016, to conduct the tests the trail along the river was walked, furthering the knowledge of the health of the river and how the the catchment area as a whole was fairing. However, some differences to the data could be assumed as when tested it was not always done by the same person, this could have then limited the accuracy. Another

In the following figure 1, the amount of lakes were present in the summer of of 1975 shows that many lakes existed before the pH level was non existent. As soon the pH level increased, the fish disappeared as well as the lakes. In spite of the fact that there are few spikes once in awhile; it is conceivable that the fish attempted

Jean-Marc Hero is among the contributing authors; he has also contributed to reputable publications regarding the Wallum Sedge Frog thus making this source, his research, trustworthy. The journal focuses on the aquatic environment in which Litoria olongburensis tadpoles reside and variables that affect their populations. The information from this study is quite relevant as changes in the water bodies affect the reproduction of the frogs and the survival of their offspring. The assessments conducted in this study relate the Wallum Sedge Frog’s habitat, and outlines factors which affect its

Water was collected using a Wan Dorn Bottle (Lab Manual). There were approximately 20 students that collected samples from the deepest part of the lake, and 20 students that collected samples from the shallowest part of the lake. The shallower portion of the lake was closest to a golf course and floating vegetation (Lab Manual). Five water collections were made at each location. From the deep part of the lake, each of the five samples was taken at 1m; from the shallower part of the lake, each of the five samples was taken at a 0.5m depth (Lab Manual). These water samples were collected into 5 separate bottles, each labeled one through five. Bottle one had water nearest the surface, whereas bottle five had water collected deeper in the lake. Bottles two through four were intermediate levels of one and five. We used the water in the bottles labeled 1, 2, 3, 4, and 5, to detect the temperature and test the pH of the water samples from the various depths of both locations. Water from the labeled bottles 1, 3, and 5 were put into bottles labeled N1, N3, and N5, and were brought back to the lab to analyze their nutrient content (Lab

First of all, the reading highlights the fact that some sources of industrial released the chemical pollution into the sea which has caused the pollution of the water; as a result, the resistance of other would be declined and could cause their death. However, the professor contends that if the otters’ death is as a result of pollution in the water, the death animals would be existed on the beach.

The results found that sea stars were negatively effected in growth rate by low pH, even lower in high temperature. Mussel growth rate was positively affected by low pH, however there was no response to high temperatures. Predation of sea stars on muscles decreased in lower pH by 50%. The overall effect shows that muscles perform better at the lower pH compared to the sea stars. Another study was done by Ferrari, M. C. O et al. (2015) which studied the effect of stressors, CO2 levels and temperature, on the predatory prey encounters in reef communities. Their method was to put 6 prey and one predator into 4 different treatments for 22 hours and record how many prey survived this was repeated 2 times for each of the 4 treatments. What the results found was that when both stressors were high, high CO2 and high temperature, the predation rate increased from 30% to 70%. Prey selection changed when it was either high CO2 or high temperature but when the stressors were together the prey selection was equal. Risk taking behaviour was also seen to increase during both stressors. A study was performed by Clements, J. C. et

Water is one of many hydrogen bonds and in being a hydrogen bond is a very strong bond. Hydrogen bonds are forces of attraction between hydrogens and electronegative atoms in two different molecules, these bonds usually have partial negative charged however in some mutations it may result differently. Freshwater creek is commonly tested, usually every march, with parameters including: DO, BOD, PH, water temperature, turbidity, dissolved nitrates, dissolved phosphates, ammonia and salinity/conductivity. Dissolved Oxygens otherwise known as DO, funnily enough is a measure of dissolved oxygen in water, by measuring DO scientists can tell us about the water and its quality. Oxygen is an essential part of life for any living creature to survive meaning it can be found underwater however is the oxygen drops below normal level creatures underwater die off due to lack of oxygen. DO levels can be brought up or down due to both natural and unnatural forces, an example of natural forces might be a result of migrant fish or water life taking up all the oxygen, an unnatural example can include runoff from farms or litter which will take up more space and oxygen. DO is usually

Besides fishing for Nile perch, fishermen raise them in controlled cages underwater (Global Invasive Species Database). Fishermen do this to curb the possibility of not being able to catch Nile Perch in the Lake Victoria (Global Invasive Species Database). Communities surrounding Lake Victoria do not know exactly how to reverse the impact of Global Warming and overfishing (McDonnel). Serious economic damage would happen if Lake Victoria’s fish all died. Lake Victoria provides income for two million individuals (McDonnel). The shortage fish in Lake Victoria raises the market value (McDonnel). This causes food shortages because fish has become unaffordable for the lower class majority (Mcdonnel). Besides stirring up economic problems from the pond, the Nile perch impacts a much bigger picture. The nile perch is an oily fish (Lowe). Tree’s are cut down to make fires to dry out the catch (Lowe). The absence of trees has caused landscape erosion and habitat damage to Lake Victoria and surrounding areas

The answer to that question is my second criterion, that animals should not be unnecessarily killed and then wasted. People like to believe that every fish that swims away, once returned to the water, lives on with a happy life. Actually, these fish experience obstacles that are detrimental to survival. In South Africa, scientists wondered just how devastating catch and releasing these fish can be. Scientists selected five species to test and the results were very gloomy. When fish leave the water the differences in pressure can cause much harm to the fish’s body. In fact, eighty-six percent of the fish caught experienced at least one symptom of barotrauma. This can result in alterations to the swim bladder, digestive organs, or collapsed lungs (Kerwath, SE., et al). Any one of these problems can make the fish weak or even die within days of the human encounter. This makes it not only hard for the fish to recover in it’s habitat, but it also makes it a target for stronger predators. This allows other species to grow while heavily targeted sport fish