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Contaminants can enter foodwebs After being transported to the Arctic by air and ocean currents and by rivers, contaminants can bioaccumulate and biomagnify in food-chains
Effect studies in glaucous gulls Lower thyroxin levels Higher progesterone levels Lower prolactin levels Lower basal metabolic rate Lower adult return rate Lower white cell count Higher intensity of parasites DNA adduct formation Higher CYP enzyme activity Lower nesting success Higher rate of wing feather asymmetry Inefficient heath transfer to eggs Reduced nest site attentiveness Lower antibody response Higher number of nonviable eggs Poorer hatching condition of chicks Skewed chick sex ratio Egg resource allocation Contaminant exposure
How do we classify vertebrates?
Task design: reading and listening content Keith Kelly
Bald Eagle By Esteban Hombre.
CHICKS AND EGGS Teaching Points © Created by Lisa Frase
Birds Bird features Wings Feathers Beak Light, hollow bones.
The Green Grass Grew All Around
Day 1 - eyes begin to form Day 2 – heart begins to beat Day 5 – formation of reproductive organs Day 8 – feathers begin forming Day 10 – beak starts to.
On top of an iceberg, All covered with snow I saw my first penguin
1 Jean Pennycook penguinscience.com Introduction to Adelie Penguins.
Mute Swan By Claire Swanson. The reproduction of mute swans The reproduction of mute swans The mating of mute swans is started in March and April That.
Chicken Embryology Development of a chick in the egg…..
Some SMESL Critters Barred Owl. The Barred Owl is known as the “Hoot Owl” Has horizontal stripes on the neck and chest Vertical bars on the stomach Has.
Lauren Rogerson Early Childhood Education Third Grade
Chapter 2 Section 3 - Insects. Section 3: Insects Largest group of animals on Earth Live everywhere but the ocean Harmful: termites, weevils, mosquitoes.
Day 51 Scientists are studying the length of ears and feet of rabbits living at different places. Which is the best hypothesis? A. If a rabbit lives further.
Swan Life Cycle By Annaisa Ms. Lissner.
Parts of an Egg.
How hormones work HBS 3A. Hormones change the function of cells Hormones enter cells and then change the metabolic activity by one of three ways Activating.
Energy in a Cell Cellular Respiration.
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