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 24.40 shows the results. FIGURE 24.40 Mortality of young male horseshoe crabs kept in tanks during the 2 weeks after their capture. Blood was taken from half the animals on the day of their capture. Control animals were handled, but not bled. This procedure was repeated B times with afferent sets of horseshoe crabs. 3. Based on these results, would you conclude that bleeding harms horseshoe crabs more than capture alone does?

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Biology: The Unity and Diversity o...

14th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781305073951
BuyFind

Biology: The Unity and Diversity o...

14th Edition
Cecie Starr + 3 others
Publisher: Cengage Learning
ISBN: 9781305073951

Solutions

Chapter 24, Problem 3DAA
Textbook Problem

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 24.40 shows the results.

Chapter 24, Problem 3DAA, Sustainable Use of Horseshoe Crabs Horseshoe crab blood clots immediately upon exposure to bacterial

FIGURE 24.40 Mortality of young male horseshoe crabs kept in tanks during the 2 weeks after their capture. Blood was taken from half the animals on the day of their capture. Control animals were handled, but not bled. This procedure was repeated B times with afferent sets of horseshoe crabs.

3. Based on these results, would you conclude that bleeding harms horseshoe crabs more than capture alone does?

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