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Lecture 22

BIOL 1902 Lecture 22: Lecture 22 Notes

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BIOL 1902
Michael Runtz

Lecture 22 Parental Care Temporary/Ephemeral ponds are egg-laying habitat • No Parental Care o Toads/Frogs o Smooth Green Snakes o Giant Swallowtail caterpillars only eat Prickly Ash o Monarchs only lay eggs on Milkweeds o Walking Sticks are carried underground by Ants due to edible capitulum o Ovoviviparity: hold eggs internally(not nourished) until they hatch (Northern Water/Garter Snakes) • No Parental Care o Only involves laying their eggs in the ground o Soil Temp determines gender of baby • Parental Care (Parasitoids) o Choose right host o Eggs of Insects, Amphibians and Reptiles not guarded after laying • Guard the Eggs(Externally) o Five-lined Skink o Red-backed Salamanders (hangs eggs in rooting logs) o Wolf Spiders carry egg around in sacs on their back o Nursery Egg Spider carry egg sacs in the jaw ▪ Create web when egg is ready to hatch and guard o Male Animals Guards ▪ Bass/Bluegill Sunfish ▪ Giant Water Bugs o Mammals(females provide parental care for 95% of mammals) ▪ 8 month gestation period (internally) ▪ Protect young for 1 year ▪ Young are precocial(born at a fairly advanced stage)
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