CH4 Life History

What are life history traits?

Traits that can be characterized or quantified and relate to reproduction and survivorship.

What groups use sexual reproduction with no exceptions?

Turtles, crocodiles, and tuataras

What group uses sexual reproduction with some exceptions?

Lizards

What group uses sexual reproduction with many exceptions?

Snakes

What is parthenogenisis?

Development from an unfertilized egg

What are the tradeoffs of egg size?

Larger eggs means less eggs

What are the different methods of sex determination for turtles?

GSD (hetero XY and ZW) and TSD

What is the TSD pattern for most turtles?

Low temps=male

High temps=female

What is associated reproductive timing?

Male and females reach peak gonadal activity at the same time

What is dissociated reproductive timing?

Males and females reach peak gonadal activity at different times

What is continual reproductive timing?

Gonadal activity is always high

What is a mating aggregation?

A large group of reptiles (usually snakes) that come together to mate

What kind of parental care do reptiles provide?

They build nests that they often guard (Turtles don’t guard).

How does temp impact incubation and development?

It often decreases incubation time and speeds up development