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Marine Iguana Energy Production

Submitted by alexispena on Wed, 12/06/2017 - 21:41

The paper Lactic Acid Production during Field Activity in the Galapagos Marine Iguana, Amblyrhyncus Cristatus by Todd T. Gleeson is a study that analyzes the significance of anaerobic energy production in Galapagos marine iguanas. Prior studies have shown that marine iguanas are physiologically adapted to burning energy while foraging underwater, and that their energy production does not vary from other iguana species. The purpose of this experiment was to understand the significance of anaerobic energy production through measuring the concentration of lactic acid after the iguanas performed normal activities: basking, foraging, diving, and running. The scientists captured basking iguanas after they had been basking for at least 30 minutes. The foraging iguanas had been sampled as they returned from foraging and were one meter on shore. To sample the marine iguanas after diving, they were forced to dive for 6 minutes then allowed to cruise for 15 minutes and then sampled. Lastly, lactic acid build up after running was sampled by chasing the iguanas for two minutes, giving them 5 minutes to recover and then drawing their blood. The results of these experiments showed that marine iguanas are capable of having large amounts of lactic acid build-up. The marine iguanas’ accumulated lactic acid while running, and it continued to get higher after they rested. During the forced dives, they also accumulated a large build-up of lactic acid that did not go down while cruising. In contrast, when blood was sampled after basking, it did not have a high concentration of lactic acid. These results support that marine iguanas undergo anaerobic energy production during bursts of activity, because there was an increase in blood lactic acid after they performed rigorous exercise. 



You start off with a very strong introductory sentence and describe everything in excellent detail, but I feel like you use, "iguana," or "marine iguana," a little too often. Instead of using those words or, "they," you could use, "reptile," or something like that instead. 

This seems like a nice paragraph for an abstract! I think the start of the sentence "Prior studies have shown that marine iguanas..." should read "Prior studies  had shown..." because it sounds like you're referring to studies that the paper your referencing referenced themselves. I also think the sentence "To sample the marine iguanas after diving, they were forced to dive for 6 minutes, then allowed to cruise for 15 minutes and then sampled" is a little confusing. I think you could perhaps cut out the "...and then sampled" part.