Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892



Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

Apply Evolutionary Thinking Overexploitation of marine fish stocks has depleted natural populations and caused a reduction in the age and size at which many fish species become reproductively mature. What sort of government regulations of fishing might reverse the current trend toward smaller adult size? Explain your answer in terms of the selection pressures that fishing places on targeted species.

Summary Introduction

To review:

The regulations the government is bringing about related to fishing in order to reverse the current trend toward smaller adult size of fish. Explain what selection pressures fishing places on the targeted species.


The excessive harvesting of marine species is known as overexploitation. Improvement in technology led to an increase in the harvesting of fish species. The harvesting of larger and older individuals has caused the maturation of these fishes 3 years earlier and reduced their size.


Overexploitation of fisheries leads to a decrease in the number of fish species that cannot recover in time. The reduction in fish species can result in the depletion of biomass resources. The depletion of selected species brings about a change in the gene frequency of that population.

This artificial selection affects the species and results in them attaining early maturation, having smaller egg size, and low sperm count...

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