Big River - November 1999

Page 1

November 1999

The monthly newsletter for people who live, work or play on the Upper Mississippi River

The Gobies are Cotning By Mi Ae Lipe-Butterbrodt

W

ildlife managers are block it - and other invasive species right behind it - from enbraced for a new invasion of the Mississippi River: a tering the Mississippi River Basin. fish with a huge, round head, the They might be too late. bulbous eyes of a frog, massive From Russia with Attitude crushing jaws and a voracious appetite. The prolific round goby, This newest invader has biologists deeply worried. Like the zebra about five inches long with the shapely body of a tadpole, is movmussel, the round goby (Neogobious ing inland toward the Mississippi melanostomus) is native to the Black via the Illinois Waterway System. and Caspian seas, where native The predators round goby and diseases keep both is just one of at least 139 species in exotic check. But species to inhere, the vade the Round gobies are extremely aggressive and have no natural lack of natGreat Lakes predators in North America. ural preda(photo from /he University of A/i1111esola Sea Gran/ Program) since Eurotors and diseases allows the round gobies to peans settled the region in the 1800s. More than a third of these multiply quickly and to displace non-native species have appeared other fish for food and habitat. in the last 30 years, since the St. Female round gobies can spawn Lawrence Seaway opened the Great batches of up to 5,000 eggs every 18 Lakes to commercial shipping by to 20 days, up to six times in a seaocean-going ships. Invaders, such son, whereas other fish breed only as the zebra mussel, ruffe, round once, explained Jay Rendall, Exotic Species Program coordinator for the goby, tubenose goby and spiny water flea, likely hitched rides in the Minnesota Department of Natural Resources (MDNR). "Even though ballast water of ships traveling from Europe to the Great Lakes. smallmouth bass and other fish eat Now, nearly a decade after the gobies, the gobies are so abundant that other fish can't even make a round goby was first spotted in American waters, federal and state dent in the population." The benthic, or bottom-dwelling, agencies are finally taking steps to (Gobies continues on page 2)

Vol. 7, No. 11

$2.75

Steaks, Seafood & EaglesDining at The Dock By Gary W. Kramer

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n awesome view, a menu with all your traditional favorites as well as some adventuresome new choices, sizable portions of good food and a relaxing decor - what's not to like ¡ about dining at The Dock restaurant in Davenport, Iowa? Located on the seawall at the foot of Perry Street, The Dock boosts almost 100 feet of window perched 20 feet above the river, just downstream from Lock and Dam 15. You get a full view of the huge rollers and the power of the roiling water rushing through the dam, where hardy walleye anglers fish the cold, turbulent water in all seasons. You can try to identify the ,, (The Dock continues on page 4)


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