Determining the Age of Fish Using Their Scales
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Determining the Age of Fish Using Their Scales
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USING NEW TECHNOLOGIES TO IDENTIFY THE AGE OF FISH
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How do you age a fish? As it turns out, kind of like a tree... Otoliths (Greek for “ear-stone”) are calcium carbonate structures found beneath the brain of most fish that aid in balance and hearing. Otoliths continuously accrete calcium carbonate throughout the fish’s life, forming bands on the otolith -- much like rings of a tree. Scientists can use these bands to tell the age of a fish. Scott France, our science lead on our previous Voyage to the Ridge expedition, explains more in this video.
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FM Tutorial 02 - Using Otoliths to Age Fish
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How do you figure out how old a fish is? Very carefully. Most fish have small​ bones in their inner ears​ called otoliths, made of calcium carbonate. They’re located in a fish’s inner ear and help with hearing and balance. As a fish grows, new layers of calcium carbonate are deposited in layers, much like the growth patterns seen in tree rings. We can count the growth rings to determine the fish’s age. Why not determine their age based on their size or weight? Like humans, fish stop growing at a
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FacebookNOAA Fisheries Service
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