Which curve best describes survivorship in oysters?

Human Anatomy & Physiology (11th Edition)
11th Edition
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:Elaine N. Marieb, Katja N. Hoehn
Chapter1: The Human Body: An Orientation
Section: Chapter Questions
Problem 1RQ: The correct sequence of levels forming the structural hierarchy is A. (a) organ, organ system,...
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**Educational Website Text:**

**Survivorship Curves Analysis**

Use the survivorship curves in Figure 52.1 to answer the following questions.

**Figure 52.1: Survivorship Curves**

This figure includes five survivorship curves (A, B, C, D, and E) plotted on a logarithmic scale. The y-axis represents the number of survivors (log scale), and the x-axis represents relative age.

- **Curve A**: This curve depicts high survivorship during early and middle life, followed by a steep decline in older age. Commonly associated with species that invest heavily in offspring care.
  
- **Curve B**: This curve shows a steady decline in survivorship throughout the lifespan. Organisms with this curve experience constant mortality rates.

- **Curve C**: This curve has a convex shape, indicating that most individuals survive to middle age but then face increased mortality.

- **Curve D**: Stepped appearance suggesting periods of high mortality followed by periods of low mortality.

- **Curve E**: This curve illustrates very high mortality rates early in life, with survivorship stabilizing for those who make it past a certain age. This pattern is typical for species with many offspring and little parental care.

**Question:**

Which curve best describes survivorship in oysters?

[Answer Box]
Transcribed Image Text:**Educational Website Text:** **Survivorship Curves Analysis** Use the survivorship curves in Figure 52.1 to answer the following questions. **Figure 52.1: Survivorship Curves** This figure includes five survivorship curves (A, B, C, D, and E) plotted on a logarithmic scale. The y-axis represents the number of survivors (log scale), and the x-axis represents relative age. - **Curve A**: This curve depicts high survivorship during early and middle life, followed by a steep decline in older age. Commonly associated with species that invest heavily in offspring care. - **Curve B**: This curve shows a steady decline in survivorship throughout the lifespan. Organisms with this curve experience constant mortality rates. - **Curve C**: This curve has a convex shape, indicating that most individuals survive to middle age but then face increased mortality. - **Curve D**: Stepped appearance suggesting periods of high mortality followed by periods of low mortality. - **Curve E**: This curve illustrates very high mortality rates early in life, with survivorship stabilizing for those who make it past a certain age. This pattern is typical for species with many offspring and little parental care. **Question:** Which curve best describes survivorship in oysters? [Answer Box]
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