Behavior of Brine Shrimp in Habitat Selection Introduction: This experiment

AP Biology Lab Report: How the Amount of Motor Oil Affects Hatching Viability of Brine Shrimp Eggs

This lab was conducted with the purpose of confirming the trait of homeostasis among goldfish. During the experiment, it was recorded that the fish would increase gill movement when placed in colder water two out of the three trials. However, the results showed no significant difference in gill movement in various temperatures of water. This has very little effect on the broad field of science since our only three trials were performed and may have included human error in the trials.

Brine shrimp have survived successfully since the Triassic period, around 200 million years this has been possible through their unique adaptations which have enabled them to avoid predators and suit their environment. They are pretty good at surviving except in space (who knew radiation isn’t good for shrimp). One of the best adaptations the brine shrimp have is their ability to survive in waters of very high salinity (up to 25%). There optimal levels of salinity are 3-3.5% but they are rarely found in waters below 6-8% salinity for the same reason this adaptation is so good, no predators occupy waters with this level of salinity. With this adaptation they are protected from much predation and have very few predators except for birds. Another reason there environment is good for their survival is that it is so widespread. Salt water lakes are found all over the world.

Brine Shrimp are a micro-crustacean that is found mostly in inland saltwater bodies, however, the salinity levels that they live in vary greatly. The conditions that they require can be made at home as the eggs (cysts) of the shrimp are dry, hard shells that can withstand drought and go without water for up to 50 years. This study presents the results of 3 different salinity levelled environments to the Brine shrimp in order to discover a salinity level that produces the most successful hatching rate. By filling 3 Petri dishes with 20mL’s of purified water, each dish contained varying sodium chloride amounts from 15ppt, 25ppt, and

One of the limitation was that the experiment was unable to simulate the effects of predation. In an actual environment some of the brine shrimp eggs could have been eaten before they are able to hatch, but since this was in a petri dish there was no such thing as predators that have reduced the hatching viability of the brine shrimp eggs. Another, limitation was the exact amount of brine shrimps you could brush up. This made the hatching viability to not be as accurate because there was different amount of eggs to start with. If there was an equal amount of eggs to begin with the hatching viability percentage would have been more accurate since they all started the same. These two limitations made the experiment not as reasonable because it stopped what could have happen to these brine shrimps in their actual

Once the experiment was concluded, aged water was slowly added to the temperature- stressed fish in order to raise the temperature of its water. This helped to return its environment back to normal conditions.

The purpose of this lab was to answer the question, “Of the saline solutions of 0%, 0.5%, 1%, 1.5%, and 2% sodium chloride (NaCl), which solution will yield the highest hatching viability for the brine shrimp?” The hypothesis was that the saline solution most precise to the concentration of NaCl in seawater, which is approximately 3.5%, will yield the highest hatching viability. Therefore, the 2% NaCl solution will yield the highest hatching viability.

2. You have measured the rate at which a fish breaths at various temperatures by counting the rate at which its gills open. The data table is shown below. Create a line graph depicting the results.

11. The experiment was repeated three more times using different water temperatures (room temp water, cold temp water, hot temp water).

We performed an experiment on crayfish focusing on their metabolic rates, via oxygen consumption, at two acclimated temperatures. Crayfish were either acclimated to a warm temperature (20 to 25C) or to a

Referring to the experiment`s hypotheses that the A. franciscana prefers light, temperatures between 20-24 ̊ C, and a basic (pH 8) environment; the results regarding the first treatment, light, were initially vague. According to the experiment results, the A. franciscana did not show a clear preference towards light or dark because both sections contained high concentrations of them; the A. franciscana also strayed from the uncovered section. Several factors may shed light on the results such as the A. franciscanas physical appearance; they possess three light-sensitive eyes that can adjust to both low and high light intensities (Fox, 2001). This means that although they may prefer light they can survive in darker habitats as well; relating back to the experiment the A. franciscana may have been content with wherever they were, resulting in limited movement.

Questions to answer in your lab report. NOTE: some questions pertain to the week 1 exercise, some to week 2, and others to both. How is the amount of temperature variation related to the volume of the water body? How might you measure the speed of temperature change? How would you expect the speed of change to vary with habitat volume? Are water temperatures different than air temperatures? How are they different? Are there any cyclical patterns in the temperature-logged data (“time series”) from Angel? If so, what do you think caused these repeating patterns? Based on the results of this exercise, how might you

The results give support for an alternative hypothesis. A goldfish is an ectotherm which means the fish’s body temperature depends mainly on the environmental temperature (White and Campo 2013). However, there were many outside factors which made the experiment

Sample Preparation: Shrimp wastes (head and shell) of Litopenaeus vannamei or Whiteleg Shrimp will be obtained from Farmer’s PublicMarket Cubao. The shrimp wastes will be washed, air dried and refrigerated overnight. This will be oven dried for four consecutive days at 65ºC.

An investigation into the effects of varying seawater concentrations on two marine invertebrates’ osmoregulatory abilities; Carcinus maenas and Arenicola marina.