Pearson eText Biology: Life on Earth with Physiology -- Instant Access (Pearson+)
Pearson eText Biology: Life on Earth with Physiology -- Instant Access (Pearson+)
12th Edition
ISBN: 9780135755785
Author: Gerald Audesirk, Teresa Audesirk
Publisher: PEARSON+
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Chapter 27.1, Problem 2CSC

The Return of the Elephant Seals

Female elephant seals reach sexual maturity at 3 to 4 years of age and produce one pup each year. Elephant seals breed harem-style, with a single large bull typically monopolizing and inseminating 30 to 100 females. Although males reach sexual maturity at 5 to 7 years of age, few are powerful enough to acquire a harem until 7 to 10 years of age; some are never able to compete. Further, although the maximum life span is about 20 years for females and 15 for males, only about 1 in 5 survives beyond 5 years of age. These factors combine to produce a biotic potential of about 12% per year. But elephant seal populations virtually never reproduce at their biotic potential. Why not?

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From Sea to Changing Sea | Early Life in the Oceans || Radcliffe Institute; Author: Harvard University;https://www.youtube.com/watch?v=Ac0TmDf5Feo;License: Standard youtube license