2nd period A day Apes
Effect of pH on Crayfish Growth Ecostudy
In this study, the effect of ph on crayfish growth will be investigated. This experiment will help scientists understand how different levels of PH can have a negative or positive effect on organisms, specifically crayfish. This study could ultimately help scientists further understand the importance of wetlands and how environmental changes in the wetlands can affect the organisms that live in it. The experiment itself will analyze the effects of PH’s on the growth of crayfish by conducting a careful, controlled experiment that specifically targets the two variables. In this experiment, the PH is the independent variable, as it is predetermined based on the experiment and is not effected by anything else. The crayfish and its growth is the dependent variable, as it is effect by the independent variable. The control will be crayfish grown in a body of water that is unaffected and has the same pH as normal water in the wetlands. This experiment is important because pH is a main characteristic of water and its effects on organisms need to be fully understood to protect the natural ecosystems.
Crayfish, also called crawfish and crawdad, are lobster or shrimp like crustaceans that mainly live in freshwater. They are much smaller than a normal lobster, usually growing to around 3-4.5 inches long (Ball). They live for around 2 years. Overall, crayfish are a pretty resilient species. They have a pretty wide toleration for the water that they live in, even though they prefer a cooler more alkaline water in the in the 7.5-8.5 range with temperatures between 65-77 F(Ball). If the water pH strays to far from the preferred range, calcium deficiency could result and affect the molting of crayfish. Crayfish are omnivores, as they eat both meat and plants. They aren’t very picky in their diet. They eat just about whatever they can get their claws on, dead or alive. Examples of crayfish food are algae...