Many people are aware that trees can be dated by counting the layers of tree rings in a cross section. But, less folks know that fish, snails, mussels, and the teeth of many local mammal species build seasonal growth rings that are used to age individuals.
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Many people are aware that trees can be dated by counting the layers of tree rings in a cross section. But, less folks know that fish, snails, mussels, and the teeth of many local mammal species build seasonal growth rings that are used to age individuals.
In Wisconsin, opening fishing applies to certain species of fish such as walleye, trout, largemouth bass, and northern pike. However, this season opener does not apply to panfish, which are open year-round. Panfish include species such as bluegill, crappie, sunfish, and yellow perch.
WXPR Field Notes
Many people are aware that trees can be dated by counting the layers of tree rings in a cross section. But, less folks know that fish, snails, mussels, and the teeth of many local mammal species build seasonal growth rings that are used to age individuals.
