Presentation on theme: "Chapter 40 Amphibians Section 3 Reproduction in Amphibians."— Presentation transcript:
Chapter 40 Amphibians Section 3 Reproduction in Amphibians
Reproduction Compare and contrast terrestrial vs. aquatic reproduction.
Courtship & Fertilization First warm days of spring, amphibians emerge and head towards water Males call to attract females of own species and warn off other males Females only respond to a call from a male of the same species
Courtship & Fertilization Females approach males, and males climb onto female’s back Males grasps female firmly in an embrace called amplexus Male clings to female until she lays eggs, then he fertilizes them externally
Life Cycle Some amphibians don’t lay eggs in water, lay eggs in moist areas One or both parents might construct a nest for amphibians Not all amphibians undergo metamorphosis- axolotl- larval stage entire life (salamander)
Parental Care Female gastric-brooding frogs of Australia swallow eggs which hatch and mature in the stomach Not digested because stomach stops producing acid and digestive enzymes until young are released