Natalie Cooper Trinity College Dublin nhcooper123 Kevin Healy healyke in this world nothing can be said to be certain except death and taxes Benjamin Franklin benfranklin ID: 331649
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Slide1
Dying without wings
Natalie Cooper
Trinity College Dublin
@nhcooper123Slide2
Kevin Healy
@
healykeSlide3
…
in this world nothing can be said to be certain, except death and taxes…
Benjamin Franklin
@
benfranklinSlide4
There is great variation in the
lifespans of living things…Slide5Slide6Slide7
How can we explain this variation?Slide8
Body Mass…Slide9
log(Lifespan) =
log(a) +b
log(Body mass)Slide10
log (Lifespan)
log(Body mass)
log(
a
)
bSlide11
log (Lifespan)
log(Body mass)Slide12
log (Lifespan)
log(Body mass)Slide13
log (Lifespan)
log(Body mass)Slide14
log (Lifespan)
log(Body mass)Slide15
Why do some species live longer than expected given their body size?Slide16
A quick side step into life history theory…Slide17Slide18Slide19Slide20Slide21Slide22Slide23Slide24
Why do species have different life history strategies?Slide25
Variations in extrinsic mortality…Slide26Slide27Slide28Slide29Slide30Slide31Slide32Slide33Slide34Slide35Slide36
Species with adaptations that reduce extrinsic mortality should have longer
lifespans than expected given their body massSlide37
How can species reduce their extrinsic mortality?Slide38
Flight?Slide39
log (Lifespan)
log(Body mass)Slide40
log (Lifespan)
log(Body mass)Slide41Slide42
Activity period?Slide43Slide44
Foraging environment?Slide45Slide46
Burrowing?Slide47
Burrowing?Slide48
We tested our predictions on 779 mammals and 546 birds (N = 1325)Slide49
Body Mass…Slide50
log (Lifespan)
log(Body mass)Slide51
log (Lifespan)
log(Body mass)Slide52Slide53
Activity period?
Foraging Environment?Slide54Slide55
Crepuscular species have the shortest
lifespansSlide56Slide57
Foraging Environment?
Activity period?
Burrowing?Slide58Slide59Slide60
Arboreal, semi-arboreal and
fossorial
species have the longest
lifespansSlide61
When you’re active
Where you’re activeSlide62
Are bats really exceptional?Slide63
log (Lifespan)
log(Body mass)Slide64
log (Lifespan)
log(Body mass)Slide65Slide66Slide67
Be active at day or night
Forage in safety
Be big
Fly
Live in a burrow