IB 203 1st Edition Lecture 6 Outline of Last Lecture Outline of Current LectureI. Life HistoryII. Main assumptionIII. Trade off relationshipsCurrent LectureLife history: Schedule of an organism’s life, this includes:- Maturity: Age at the organisms first reproduction- Fecundity: Number and size of offspring- Parity: Number of reproductive events- Life span: The course of the organisms agingMain assumption: That there will consistently be a problem of limited time and resources that cause these traits to be the way that they are“trade off”: Because there is a limited pool of resources, as one factor is increased it will be allocated more resources and as a result, another factor will suffer Trade off relationships:- Number of offspring per breeding vs adult survival between successive breeding attempts. o Explanation: the adult survival between successive breedings decreases as the number of offspring per breeding increases, because the parents must allocate more resources to caring for offspring, leaving the parents depleted and shortening their life spans. - Optimal age at maturity varies based on life span and age at first reproductiono Explanation: If the organism can maintain a longer lifespan, it might be beneficial for the species to wait to reproduce until a prime age because then it will be ableto dedicate a greater amount of resources to that reproductive cycle.These notes represent a detailed interpretation of the professor’s lecture. GradeBuddy is best used as a supplement to your own notes, not as a substitute.- Life span determines optimal allocation between growth and fecundityo If an organism has a shorter life span, it would be beneficial to have slow growth and high fecundity whereas of it has a long life span, rapid growth and low fecundity is
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