Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
6th Edition
ISBN: 9780134555430
Author: Colleen Belk, Virginia Borden Maier
Publisher: PEARSON
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Chapter 13, Problem 1AAATB
Summary Introduction
To investigate:
The two wolf populations in Alaska and northern Great Lakes can be considered different species. The information required to examine this.
Introduction:
When the environment creates an outside barrier to reproduction, such as a mountain range or river, it is known as reproductive isolation. A genealogical species can be defined as a base group of organisms whose members are associated more closely to each other than to outside organisms. These do not contain any outside group.
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Conservation biologists working with the Florida panther have set out camera traps to estimate the overall population. Through a combination of live trapping and hair snares, the biologists have worked out the exact genetics for two alleles in all remaining individuals. The homozygous recessive state causes a debilitating disease and the panthers die before reproducing. Biologists have found a high incidence of heterozygous individuals. Help the biologists determine the best conservation action in order to protect and boost the genetic health of the remaining population. The current population of Florida panthers in this example is twenty which is based upon available habitat. Eighteen of the panthers are heterozygous [Aa]. Scientists have determined that eighteen is the minimum viable population for the Florida panthers.
How many of the twenty panthers in this generation will suffer from the disease and die?
What is the number of survivable Florida panthers?
One concept of conservation biology is known as minimum viablepopulation. Some species’ populations are so fragmented andsmall that they may have very little genetic variability left. Withminimal genetic variation in the population, there is little likelihoodthat a population can adapt to an environmental threat, such as anew disease. Florida panthers are at or below the minimum viablepopulation level (estimated population less than 80).
1)Do you think that it is practical to use limited resources toconserve a population like the Florida panther?
2)Why?
New Zealand snapper populations were found to be under the influence of genetic drift, suggesting overfishing was still an issue for them, despite the New Zealand fisheries estimating their total population size to be over 3 million. Which of the following is the best explanation for this observation?
A) Pelagic fish, like the New Zealand snapper, often only have a few reproductive individuals, therefore their effective population size is actually much smaller than the total population size.
B) Pelagic fish, like the New Zealand snapper, often have an equal sex ratio which affects the number of breeding individuals.
C) Pelagic fish, like the New Zealand snapper, often have disassortative mating which affects the number of breeding individuals.
D) Pelagic fish, like the New Zealand snapper, often have assortative mating which affects the number of breeding individuals.
Chapter 13 Solutions
Biology: Science for Life with Physiology (6th Edition) (Belk, Border & Maier, The Biology: Science for Life Series, 5th Edition)
Ch. 13 - Define biological species.Ch. 13 - Prob. 2LTBCh. 13 - Prob. 3LTBCh. 13 - Prob. 4LTBCh. 13 - Prob. 5LTBCh. 13 - Prob. 6LTBCh. 13 - The biological definition of race corresponds to...Ch. 13 - All of the following statements support the...Ch. 13 - Similarity in skin color among different human...Ch. 13 - Prob. 10LTB
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