NATR 320 Lecture Notes - Lecture 10: Ocean Sunfish, Daylily, Guppy
22 May 2020
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Document Summary
Determinate growth: correlated with long-lived individuals, individual does not grow anymore once it initiates reproduction (many birds and mammals) Indeterminate: short-lived organisms, an individual continues to grow after it initiates reproduction. If they survive one reproductive event, they keep on surviving to reproduce because itis more beneficial. Many plants, invertebrates, fish, reptiles, and amphibians. Ocean sunfish mola mola: can grow up to 1000 kg, can reproduce even more eggs. Trinidadian guppy: same population, different life histories based on predation. Upper stream: few predators - long life expectancy. Lower stream: many predators - short guppy life expectancy. Reproduce sooner - reach maturity at smaller size. Creosote king clone: 11,7000 years old, 45 feet diameter, small parts grow off the parent. Gradual decrease in fecundity and increase in the probability of mortality (molecular defect accumulation) High survival rates - stronger selection for delaying senescence. Bats age more slowly than rodents of a similar size.
