Bio 201 F09 Lowry lect 31 (L31) populations II

Bio 201 F09 Lowry lect 31 (L31) populations II - Fact of...

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Fact of the day Types of survivorship curves Type I Most individuals are lost when they are older Vertebrates or organisms that exhibit parental care and protect their young Type II Almost linear rate of loss Many birds and some invertebrates Type II Survivorship Curve Types of survivorship curves Type I Most die when older Vertebrates or organisms w/ parental care Small dip at young age Type II linear rate of loss Many birds, invertebrates Type III many lost in juvenile stage Invertebrates, many plants, and marine invertebrates without parental care – Predation, establishment
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Type I T y pe I I T y p e I I I Many mammals Many birds, small mammals, lizards, turtles Many invertebrates Age Number of survivors (n ) (log scale) x 1000 100 10 1 0.1 Population Growth Collecting data on how populations change Predicting population changes with models
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Population Growth Collecting data on how populations change
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