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Brine Shrimp Lab Report

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Words 477
Pages 2
Kendall Montgomery
AP Biology
Period 1

The Effect of Varying Light Intensities on the Location Preference of Brine Shrimp

Hypothesis:
If brine shrimp are placed in a chamber with varying light intensities, then they will prefer a chamber with significant light intensity because they need light in order to hatch and develop.

Null Hypothesis:
If brine shrimp are placed in a chamber with varying light intensities, then they will not have a preference.

Procedure:
The brine shrimp were placed in the long tube choice chamber. Four quadrants were labeled and covered with varying materials to block out a certain amount of light. Quadrant 1 was in full light with 62 FC, quadrant 2 was covered in a material that allowed 29 FC of light, quadrant 3 was exposed to 12 FC of light, and quadrant 4 only had 1 FC, or almost no light exposed. Brine shrimp were introduced to the choice chamber with a 60 mL syringe and then observed for several minutes before recording results.

Results: …show more content…
The chambers were then clamped off so that no shrimp could change their location while the observations were being recorded. The largest number of shrimp, 9 of the 24 (37.5%), was in quadrant 1 with 62 FC light. The next brightest chamber, quadrant 2, contained 8 shrimp (33.3%). The third quadrant with light intensity of 12 FC consisted of only 4 shrimp (16.7%), and the last with 1 FC had only 3 shrimp (12.5%). It was observed that the shrimp preferred the brighter environments and favored moving toward

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