The New York State Department of Environmental Conservation (DEC) has announced that Round Whitefish may soon be taken off New York’s list of endangered species and reclassified as threatened.
Fisheries biologists recently netted 15 Round Whitefish in Bug Lake of Hamilton County near Inlet. Six of these fish were second generation after stocking.
This will be the third water with offspring found after stocking. The first two include Trout Pond of St. Lawrence County and Evergreen Lake of Herkimer County. DEC chose Bug Lake for stocking because it is a cold and clean lake which has provided a high-quality fishery for brook trout and lake trout.
Once fairly common throughout the Adirondacks, the round whitefish could be found in about 60 different lakes including Big Tupper, Piseco, Big Wolf, Raquette, Blue Mountain, Meacham, and the Fulton Chain. Many lakes were stocked with hatchery reared fry between 1886 and about 1904, but the consequences were uncertain. However, surveys conducted from 1985-1987 by New York State’s Division of Fish and Wildlife could only find round whitefish populations in six Adirondack water bodies. Surveys conducted before 1979 found them in only 14 waters and surveys between 1979 and 1997 found them in only nine. DEC has stocked a total of 19 waters in regions 5 and 6 since 2000.
Possible reasons for the decline in round whitefish populations include: predation by invading yellow perch on whitefish eggs and fry; predation by smallmouth bass; competition with lake whitefish; over-fishing; loss of spawning sites; siltation; and lake acidification. Some of these factors continue to pose a threat to remaining populations. Round whitefish are now protected from harvest or possession by the Endangered Species Law.
Round Whitefish (Prosopium cylindraceum) average about 8-12 inches in length and occasionally reach 22 inches. Their body shape is long and tubular with a nearly round midsection (hence its latin name). Its head is short and its mouth is small and inferior (snout extends beyond lower jaw). A single flap exists between the nostrils, distinguishing it from other whitefishes and ciscoes. The round whitefish is olive-brown on top shading to silver below. Young round whitefish have rows of black spots (called parr marks) similar to those of young trout and salmon.
Round whitefish spawn in the fall (November-December) over gravel shoals of lakes or at river mouths. The males arrive on the spawning grounds first. Eggs are broadcast over the shoals and hatch approximately 140 days later. The young reach 3-4.5 inches by the end of the first year of life. Both sexes become mature when they reach about 12 inches in length at age 3-4. Adult round whitefish rarely live longer than 13 years.
Round whitefish are bottom feeders. They eat a variety of invertebrates including mayfly larvae, chironomid larvae, small mollusks, crustaceans, fish, and fish eggs.
Photo: Round Whitefish, courtesy Wikimedia User LevPN.