Senescence (his research) Flashcards

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1
Q

What type of survivorship curves do adult odonates typically have

A

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

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2
Q

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

A

mark-recapture

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3
Q

What was the synopsis (2) about damselflies

A
  1. strong evidence for decline in survivorship with age in damselflies and dragonflies
  2. evidence doesn’t extend to decline in reproduction
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4
Q

There is not much known about ______ senescence

A

whole plant senescence

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5
Q

Why was duckweed chosen to use for whole plant senescence

A

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

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6
Q

What are the three components of aging

A
  1. survival
  2. reproduction
  3. offspring quality (offspring of older parents will be of less quality)
    (decrease in all, and equal progressive physiological deterioration)
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7
Q

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

A
  1. area (decrease with age)
  2. continuous symmetry measure (relatively the same)
  3. circularity (increased)
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8
Q

Inclusions of duckweed work

A
  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
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