Biology: Life on Earth
10th Edition
ISBN: 9780321729712
Author: Gerald Audesirk, Teresa Audesirk, Bruce E. Byers
Publisher: Benjamin Cummings
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Chapter 18, Problem 4AC
Summary Introduction
To review:
The protection of the Florida Panther by the Endangered Species Act.
Introduction:
The Florida Panther, which only live in the Florida Everglades, is recently considered as an endangered species and could extinct due to human activities. It is considered as a subspecies of a cougar but recently, mitochondrial DNA analysis suggests that may be a hybrid of South American and North American cougars.
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Students have asked these similar questions
In the United States, the rare red wolf (Canis lupus) has been known to hybridize with coyotes (Canis latrans), which are much more numerous. Although red wolves and coyotes differ in terms of morphology, DNA, and behavior, genetic evidence suggests that living red wolf individuals are actually hybrids. Red wolves are designated as an endangered species and hence receive legal protection under the Endangered Species Act. Some people think that their endangered status should be withdrawn because the remaining red wolves are hybrids, not members of a "pure" species. Do you agree? Why or why not?
The current wild population is estimated to be about 50 individuals. However, a new threat to red wolves has arisen: hybridization with coyotes (Canis latrans), which have become more numerous in the areas inhabited by red wolves. Although red wolves and coyotes differ in morphology and DNA, they are capable of interbreeding and producing fertile offspring. Social behavior is the main reproductive barrier between the species and is more easily overcome when same-species mates are rare. For this reason, some people think that the endangered status of the red wolf should be withdrawn and resources should not be spent to protect what is not a “pure” species.
A population of interbreeding birds has been split by a geological event after which the isolated part of the
population started to evolve into an incipient species with different mating rituals. Due to a recent environmental
change the two populations are now able to potentially mate again in what is called a hybrid zone. Mating does
take place every now and then but the hybrid offspring appear less able to survive. As a consequence, mating
rituals start to diverge even further. We call this process of continued divergence?
O Fusion
O Behavioral isolation
Reinforcement
O Postzygotic isolation
O Stability
Chapter 18 Solutions
Biology: Life on Earth
Ch. 18 - The science of naming and classifying organisms is...Ch. 18 - 2. 2. A scientific name consists of a(n) _________...Ch. 18 - In Linnaean classification, the eight major...Ch. 18 - 4. Systematists determine the evolutionary...Ch. 18 - Prob. 5FTBCh. 18 - The number of named species is about __________,...Ch. 18 - What contributions did Linnaeus and Darwin make to...Ch. 18 - What features would you study to determine whether...Ch. 18 - What techniques might you use to determine whether...Ch. 18 - 4. Only a small fraction of the total number of...
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