Chapter 1 Chapter 2 Chapter 3 Chapter 4 Chapter 5 Chapter 6 ...
Chapter 1
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Transcript of Chapter 1
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Chapter 1
Zoology: An Evolutionary and Ecological Perspective
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Animal Extinction“no longer exists”
• Has increased dramatically in recent years
• Seriously threatened habitats:Rain forests GrasslandsMarshes DesertsCoral reefs
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Animal Extinction Causes:• Mostly due to habitat destruction
– Tropical rainforest reduced to 44% – Forest coverage in Ecuador reduced by 95%
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• Other causes include:– Climate change– Pollution– Foreign species invasion
Animal Extinction
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• Endangered species – an imminent danger of extinction throughout its range (where it lives)
• Threatened species – likely to become endangered in the near future
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2003 U.S. Fish & Wildlife Service
1,263 species endangered or
threatened
1,824 foreign species endangered or
threatened
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Zoology: The study of animals
Because of the large variety and complexity of animals zoology is the broadest field in science
• 300,000 species of beetles• 20,000 species of bony fish
Zoologists specialize in subdisciplines……
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Anatomy: Study of the structure of entire organisms and their parts.
Cytology: Study of cell structure & function.Ecology: Study of relationships between organisms
with their environment.Embryology: Study of the development of animal
from fertilized egg to birth/hatching.Genetics: Study of mechanisms of transmission of
traits from parents to offspring.
Specializations(structural, functional, ecological aspects)
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Specializations(structural, functional, ecological aspects)
Histology: Study of tissues.Molecular Biology: Study of subcellular details of
structure and function.Parasitology: Study of animals that live in/on other
organisms at the host’s expense.Physiology: Study of the function of organisms and
their parts.Systematics: Study of the classifications of, and the
evolutionary interrelationships among animal groups.
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Specializations
Study of insects
Study of amphibians and reptile
Study of fishes
Study of mammals
Study of birds
Study of protozoans
Entomology:
Herpetology:
Ichthyology:
Mammalogy:
Ornithology:
Protozoology:
(Groups of animals)