LIFESCI 1 Lecture Notes - Lecture 25: Internal Fertilization, Parental Investment, Edge Effects
Document Summary
Population is randomly distributed (doesn"t work with clumped population: overestimate population size) Can also check age via scales which show reproductive level. Long tape measure, lay quadrats in randomly predetermined areas, then you would count all the barnacles within the quadrats. Age matters: thinking about what the population will look like in the future. Length of fish gives information about age which gives info about future population growth. Removal of larger fish reduces the growth rate of rockfish populations. Loss of reproductive fish loses reproductive capacity: losing future fish. How many offspring will survive to reproductive age. The adult butterfly is threatened by predators. Larval stage: parasites and predators eat the larva. Lower and lower survivorship as the life stages ascend. Time on x axis, survivorship on y axis. Mortality at the end of the curve. Type ii: consistent rates of mortality throughout life. No stage is more vulnerable than another. Type iii: high mortality early in life.
