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AdaptationsAre changes in physical forms or behaviors brought about by natural selection that enable an organism to better survive in its natural habitat.
Many adaptations have to do with getting food and oxygen, moving or staying in one place, protection, or living in certain places.
Aquatic Organisms and their adaptations…
What adaptations to living in water can be seen on these stream animals?
CrayfishMayfly Burrowing Mayfly
1. Hard outer “shell” provides protection2. Hooks on feet anchors in moving water3. Streamlined shape4. Gills on the two insects5. Claws on the crayfish for gathering food
and fighting, display6. Paddle-shaped tail on the crayfish for
swimming
CrayfishMayfly Burrowing Mayfly
12
4
What adaptations on these insects are used for getting oxygen?
Gills – feathery structures on the body
Caddisfly LarvaWater Penny Larva
Water Boatman
Water Strider
What adaptations on these insects are used for locomotion?
Paddle shaped feet for “rowing” through the water
Very thin legs to walk on top of the water
What adaptations on these animals are used for staying in one place?
Suction cupMuscular “foot”
Blackfly larva
Mussel
What adaptations on these animals are used for gathering food?
Siphons water in and out to filter the food
Brushes in front of mouth for filtering water
Head of a Dragonfly nymph
What do you think is the purpose of the lower lip?
The lower lip extends out in front of the head and captures prey to bring back to the mouth to eat. It can eat tadpoles and minnows larger than it is.
How are these fish adapted for locomotion through the water?
1. Streamlined shape2. Slimy body3. Fins for stabilizing4. Strong tail fin for
movement
Which of these turtles is the most aquatic? How can you tell?
Softshell Turtle
Box Turtle
Red-eared Slider
Softshell Turtle – streamlined shape, webbed feet
Heron Duck
Osprey
What are each of these feet adapted for?
Walking on soft mud (like a snow-shoe)
Paddling in water (boat oar)
Catching and holding slippery fish (cooking tongs)
