Biology: The Unity and Diversity of Life
15th Edition
ISBN: 9780357093795
Author: STARR
Publisher: CENGAGE LEARNING (CUSTOM)
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Chapter 24, Problem 3DAA
Sustainable Use of Horseshoe Crabs Horseshoe crab blood clots immediately upon exposure to bacterial toxins, so it can be used to test injectable drugs for the presence of dangerous bacteria. To keep horseshoe crab populations stable, blood is extracted from captured animals, which are then returned to the wild. Concerns about the survival of animals after bleeding led researchers to do an experiment. They compared survival of animals captured and maintained in a tank with that of animals captured, bled, and kept in a similar tank. FIGURE 24.28 shows the results.
FIGURE 24.28 Mortality of young male horseshoe crabs kept in tanks during the 2 weeks after their capture. Half the animals were bled on the day of their capture. Control animals were handled, but not bled. This procedure was repeated 8 times with different sets of horseshoe crabs.
Based on these results, would you conclude that bleeding harms horseshoe crabs more than capture alone does?
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PART A: Fishing for the Future
Review the Tragedy of the Commons: https://youtu.be/CxC161GvMPc
Additional resources for this laboratory exercise:
Seafood Watch: http://www.seafoodwatch.org/
Center for Marine Conservation Ocean Action Network: www.cmc-ocean.org
Marine Fish Conservation Network: www.conservefish.org
World Wildlife Fund Conservation Action Network: www.takeaction.worldwildlife.org
UN FAO Fisheries and Aquaculture Department: www.fao.org/fishery/en
Marine Stewardship Council: www.msc.org/
1 Why is conservation important?
2 Do a search online. What can you do to help protect the oceans?
Chapter 24 Solutions
Biology: The Unity and Diversity of Life
Ch. 24 - Sustainable Use of Horseshoe Crabs Horseshoe crab...Ch. 24 - Sustainable Use of Horseshoe Crabs Horseshoe crab...Ch. 24 - Sustainable Use of Horseshoe Crabs Horseshoe crab...Ch. 24 - Prob. 1SQCh. 24 - Prob. 2SQCh. 24 - Prob. 3SQCh. 24 - Prob. 4SQCh. 24 - Prob. 5SQCh. 24 - Prob. 6SQCh. 24 - Prob. 7SQ
Ch. 24 - Prob. 8SQCh. 24 - Prob. 9SQCh. 24 - Prob. 10SQCh. 24 - Prob. 11SQCh. 24 - _______ include the only winged invertebrates. a....Ch. 24 - Prob. 13SQCh. 24 - Match each structure with its descriptions. _____...Ch. 24 - Prob. 15SQCh. 24 - A massive die-off of lobsters in the Long Island...Ch. 24 - A rise in atmospheric carbon dioxide increases...
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