Eutrophication lowers the levels of dissolved oxygen in the water and makes the water uninhabitable by many aquatic organisms, including tilapia. Temperature refers to the degree of heat and is a measure of the average heat or thermal energy of the particles in a substance. This criterion assesses the development of the purpose of the study. Aim: To assess fish population, feeding practices its effects on the environment and water quality and hence deduce the quality of the fish. Water samples were collected at each of the visited sites by placing the water bottles under water for 1 minute, until all the air bubbles were removed. The number of purple colonies as E. Whether you discuss physical implications and problems we face today or the methods and technologies created for environmental sustainability, environmental science is a very dynamic field of study that relates to our world and what we are doing to preserve its beauty and resources for future generations.
It was also used as an American military base during the period of World War 1. Four pretreated sterile petri dishes were obtained and each petri dish was labelled with the culture type, site name, date, and volume of sample. But since then we have also seen changes to our technology which has had a great impact on our ecosystem for. These levels were low and would not be toxic to the tilapia, thus allowing them to grow and reproduce efficiently. Finally, nitrates, which are soluble in water, and exits in water as No3 -, are an essential source of nitrogen required by plants and animals to synthesize amino acids and proteins. However, only a minute amount is necessary, therefore, an excess can easily occur.
The probe was washed with distilled water and the readings of the samples were then taken. The mathematical formula below was used to estimate the population size of the tilapia. What Are the Effects of Non-Biodegradable Waste? Although the tilapia would be able to survive under these conditions and would not be directly affected, if the tilapia is consumed by humans, it may result in health complications. This includes dissolved salts for example, sodium chloride, NaCl, and solid particles such as silt and plankton. G village consists of ten 10 streets, five 5 female-headed households from each street were randomly selected, and questionnaires administered to them. After this, the lid was quickly fastened on the bottle, while it was still under water.
The beakers were placed in a drying oven at a 100 °C until the following day. Additionally, farmed tilapia is less healthy than wild tilapia because reared tilapia is fed an unnatural, unhealthy diet of cheap grains and soy pellets, rather than plankton, plants and algae, and also contain less healthy fatty acids than their wild counterparts. Sodium Sulfite Calibration Solution 8. To investigate the biodiversity of four coastal ecosystems in Trinidad 2. The feeding practices and harvesting were also documented.
You must get approval of your topic directly from me before you run the experiment. After collecting these samples the fifth site was then sampled. The equation below was used to determine the concentration of bacteria per 100 mL for each sample collected. Both ammonia and ammonium are present in the water at all times, and the percentage is influenced by temperature and pH. However, there are many issues faced with tilapia rearing. For this investigation, the pond was divided into 4 sites. Sodium Sulphite solution was used to calibrate the LabQuest2 Probe.
The plates were allowed to sit undisturbed in order to allow the media to gel. As a result, there will be an increase in water temperature, thereby causing the water to lose its ability to hold dissolved oxygen, which results in an increase in the Biological Oxygen Demand. As such, this site was therefore was least affected by anthropogenic activities, however the species diversity at this site was the lowest, being that of 5. These services include transportation and shipping via the ports, fishing as a source of food and, recreation. As such, Nitrate and Phosphate fertilizers may have been utilized, which would have therefore entered the pond water.
Once the concentrations were calculated for each sample, the two values were averaged together to determine the average concentration of bacteria per 100mL. Consider your results in the context of relevant literature and accepted scientific understanding and models This can include the identification of trends, patterns or anomalies that may or may not agree with established theory Evaluation and improvement Describe the strengths and weaknesses and limitations of the study. Lastly, I pay gratitude to the authors of the various websites via the internet services which allowed me to obtain vital information needed for this Internal Assessment. The total size of the pond was 10, 800 sq meters, however, the sample area used was 36 sq meters. Temperature also has an effect on the Biological Oxygen Demand.
The reason that environmental science is so important is because it brings. Coli present in the water samples taken from each of the four sites visited. Firstly, the assumptions of science as an authority lend it to be a privileged type of knowledge. This study focuses mainly on four coastal ecosystems in Trinidad. Before 1960, very few people knew the term ecology. Also make recommendations as it relates to the trends, peculiarities etc…. Therefore, the total estimated population of tilapia present at Site B of the pond was 64% greater than the ideal population.
To assess, identify and compare the various anthropogenic impacts of each site 3. When the Alkalinity level is high, the Nitrate level would therefore be low as water is able to neutralize nitrates which are acidic in nature. Sodium Sulphite solution was used to calibrate the LabQuest2 Probe. Also, aquatic organisms are extremely sensitive to the pH of their environment. Additionally, upon capturing the tilapia, their size was measured, and their general colour was observed. Oxygen is vital to aquatic species as they use it to build energy through respiration. If possible be specific about the direction and magnitude of the change you expect to observe in the dependent variable as a result of changes you make in the level of the independent variable.