Oneida Lake Association, Inc.

Conservationists and Environmental Advocates since 1945
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Oneida Lake in Central NY


ONEIDA LAKE'S CORMORANT PROBLEM:

by Jack Henke


ONEIDA LAKE'S CORMORANT PROBLEM:

General Information

1. Cormorant predation is the major factor behind the drastic decline in Oneida's walleyed pike population. The birds' feeding has destroyed hundreds of thousands of walleyes in the 1990's.

2. Cormorants are also responsible for severe reductions in our lake's yellow perch population. The number of adult perch hovers around 700,000--a fraction of its former self. In some years, the birds have consumed more than 200,000 perch that had reached age 2--a size at which they have an excellent chance of surviving to adulthood. The perch death toll from cormorant predation throughout the 1990's extends well into the millions.

3. Poor fishing has resulted from reduced walleye and perch populations. Poor fishing translates into economic losses. Marinas, motels, restaurants, and bait/tackle stores in the lake region have experienced economic hardships. The OLA submitted a detailed economic analysis of 15 marinas on Oneida Lake. This report documented nearly $1,000,000 lost every year to the area's economy because anglers had left these marinas. The report stressed that this loss is but a fraction of the total amount lost by the region because of the bad fishing brought on by cormorants' predation. The OLA gave the Fish and Wildlife Service several copies of this report.

4. The cormorant colonies on Wantry and Long Islands have destroyed much of those isles' vegetation. Wantry, in particular, bears the appearance of a "cormorant guano wasteland", and anyone approaching the islands from their downwind side had best be prepared for some memorable odors.

5. The Oneida Lake Association is committed to the cause of eliminating cormorant predation on the lake. The Association strongly believes in working through the legal channels of the Fish and Wildlife Service and condemns any vigilante efforts at harassing or harvesting cormorants.

This graph, produced by Cornell Field Station biologists, clearly shows their prediction for Oneida Lake's perch population if cormorants were eliminated (the "no cormorants line"). Perch numbers would soar from under 1,000,000 to 3,000,000 by 2010.

The other lines on the graph show the following:

"Status quo" means that nothing is done to change today's situation.

"No harvest" means that anglers stop catching yellow perch, but cormorants continue to feed.

"No top predators" translates to stopping both angler and cormorant predation.