Senescence (his research)

Question 1

What type of survivorship curves do adult odonates typically have

Answer 1

type II, constant mortality rate = exponential decay of survivorship = no senescence

Question 2

What method did they use to study and get a survivorship curve of damselfly

Answer 2

mark-recapture

Question 3

What was the synopsis (2) about damselflies

Answer 3

1. strong evidence for decline in survivorship with age in damselflies and dragonflies
2. evidence doesn’t extend to decline in reproduction

Question 4

There is not much known about ______ senescence

Answer 4

whole plant senescence

Question 5

Why was duckweed chosen to use for whole plant senescence

Answer 5

very fast growing which gives large sample size, and short lived so easy to follow for whole life

Question 6

What are the three components of aging

Answer 6

1. survival
2. reproduction
3. offspring quality (offspring of older parents will be of less quality)
   (decrease in all, and equal progressive physiological deterioration)

Question 7

What did we measure in duckweed (size and shape measurements) and how did they result with age

Answer 7

1. area (decrease with age)
2. continuous symmetry measure (relatively the same)
3. circularity (increased)

Question 8

Inclusions of duckweed work

Answer 8

1. Senescence manifests as declines in survival, reproduction, and offspring fitness
2. offspring of older parents show shape differences compared to those of younger parents