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Fish Populations

Fish populations sometimes dwindle or skyrocket depending on the availability of food, how heavily they are fished and various natural factors. Fish populations are monitored in order to protect species from endangerment or extinction.

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How Fisheries Work

If you like fish -- to watch or to eat -- then you should admire fisheries. There are many different types, but all of them ensure that fishing doesn't get out of hand.


How are fishing quotas set?

Without fishing quotas, we might reach a day when there's no surf in surf and turf. Overfishing is a huge problem and could lead some fish to extinction. How's fishing regulated? See more »

How are fishing reports created?

Can't get a bite? Fishing reports can give you a heads-up about weather conditions, water temperatures and fish behavior before you even hit your chosen body of water. But how are they created? See more »

How can a catfish grow so big?

At maturity, catfish come in a wide range of sizes. Some little guys can be as tiny as 1 1/2 to 2 inches long. And some can grow to mammoth sizes. But none have anything on the Mekong giant catfish. See more »

What's the biggest threat to freshwater habitats?

Saltwater accounts for 97 percent of all the water in the world. That means only 3 percent of all water is freshwater. Who's to blame for the contamination of this scarce yet vital resource? See more »

What are fish ladders?

Most fish only make two big trips in their lifetimes -- one shortly after birth and one when it's time to breed. But what's a fish to do when a dam's in the way? See more »

How Fish Stocking Works

You may want to fill your pond to the brim with bass, but you can't just go throwing fish into the water whenever you darn well please. To keep those fish alive, you need to do a little research first. See more »

What are fish managers?

With so many people fishing, it's possible that some species could be become extinct. Who keeps an eye on the fish population to ensure it doesn't get fished out? See more »

How Fisheries Work

If you like fish -- to watch or to eat -- then you should admire fisheries. There are many different types, but all of them ensure that fishing doesn't get out of hand. See more »

How can panfish populations benefit from anglers?

It sounds counterintuitive, but active anglers can actually help panfish thrive. By choosing crappie or bluegills over bass, fishermen stop the phenomenon of fish stunting before it starts. See more »