Lab 11

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University of Kentucky *

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113

Subject

Anthropology

Date

Oct 30, 2023

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pptx

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4

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Group 1
Background We are comparing two different types of fish in the same lake that both appear to be sticklebacks, but have different physical features.
Field Study Hypothesis: Benthic and limnetic sticklebacks are the same species Methods: We would go to a lake and catch both types of fish using a fishing net and collecting them in a big bucket. We would try and catch fish with and without pelvic spines, in varying sizes and color. We would observe the physical features, make a graph of the observable physical traits of all fish, and compare and contrast morphological traits of all fish to see if they are related. Results and discussion: Based on the data set, we found that the benthic, limnetic, and hybrid all differ in physical features (average body depth, average number of gill rakers, average jaw width, etc.)
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Laboratory Experiment Hypothesis: Benthic and limnetic sticklebacks are the same species Methods: We would breed the fish, observe whether the offspring is viable and fertile, then test the fertility of those offspring by breeding those together. Results and discussion: The data does in fact address our hypothesis as a result of morphological traits being included. In addition, a graph that includes mating preferences that shows hybrid viability. From the data we are able to conclude that hybrids would in fact be viable because they show a 95-97% survival rate. The two fish species have many morphological differences, and the morphological concept would deem them different; according to the biological concept, they are deemed the same species.

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