Question

How can the age of a fish be precisely determined?

Answer 1

Answer:

Aging fish is similar to aging a tree by counting the number of growth rings. However, the age of the fish is determined by counting the number of wide growth rings called annuli

Answer 2

Answer:

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Explanation:

Scales are commonly used to age most species of fish. A typical scale from a bluegill is shown here. The scales are usually removed with the blunt edge of a knife from the upper side of the fish, just under the front edge of the dorsal fin and above the lateral line. About 10 scales are taken from each fish sampled because some of the scales collected may be replacement scales, which can't be read accurately. Lateral line scales can't be used for aging because they have a tube through the center which obscures the growth rings.

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