BOWDOINHAM, Maine — A lack of ice in cold weather states this year has made it difficult for scientists to study the population of an ecologically important fish.

Rainbow smelts, which are small fish that are very popular with ice anglers, have been a focus of conservationists for many years. The federal government listed the fish as a species of special concern more than 15 years ago due to declines in its population.

In Maine, a late arriving winter has made it difficult to collect data about the health of the smelt population. The weather had been warmer than typical until early February, so there hadn’t been enough ice to attempt to catch them.

Other states where ice fishing is a winter tradition, such as New Hampshire and Michigan, have had similar problems. The ice is hardening in many states now, but the season is likely to be shorter than typical.

“With the season starting so late, we have not had many opportunities to sample the commercial and recreational catches this year,” said Michael Brown, a fisheries scientist with the state of Maine.

The smelts are important because they are a key piece of the food chain in coastal areas, lakes and rivers. The cause of their population decline is the subject of ongoing scientific study. Loss of habitat and climate change have the biggest impact on smelt populations, Brown said. Over-fishing has also played a role, the Maine Department of Inland Fisheries and Wildlife and other authorities have reported.

Recreational anglers who seek smelts through the ice, such as at smelt camps that line Maine waterways in the winter, are fond of frying and eating them with the head still on. Others use the fish as bait.

The lack of ice has also been a blow for businesses that depend on winter fishing. On Lake Erie, ice fishing charter boat captain Tony Muscioni said thick ice finally arrived about three weeks ago, which was about four weeks later than normal. Muscioni, who owns Air1Airboats, which leads charters from Port Clinton, Ohio, said it was a continuance of a troubling trend from recent years.

“These last couple years were bad,” said Muscioni, whose customers are mostly seeking walleye.

Rivers in Maine that would normally have 20 inches of ice, such as the Piscataquis and Meduxnekeag, have less than 10 inches this year, said Tom Hawley, a hydrologist with the National Weather Service. It adds up to a rough year for fishing, he said.

“On the lakes, they probably have enough ice to do it, but even there they don’t have nearly as much as they normally would,” Hawley said.

Commercial fishermen in America caught millions of pounds of rainbow smelts in the 1970s, ‘80s and ‘90s, but the catch collapsed in the 2000s.

Fishermen caught less than 50,000 pounds in 2018, the most recent year for which statistics are available, federal data state. Most of the commercial catch was located in Michigan, though Wisconsin, Pennsylvania and Minnesota have also recorded catches in recent years.

Copyright 2021 The Associated Press. All rights reserved. This material may not be published, broadcast, rewritten or redistributed without permission.

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