. The Canadian field-naturalist. 1993 Notes 353 235 g and measured 277 mm in total length. Almost two years later, on 12 October 1992, a third Skipjack Herring was caught in 9 m of water from Lake Michigan east of Bailey's Harbor, Wisconsin, near the outlet of Moonhght Bay (longitude 87°4';, lat- itude 45°4';). This 43 cm specimen weighed kg. These last two specimens are stored at the Wisconsin Department of Natural Resources's (WDNR) Research Center in Monona, WI (catalog numbers 18070 and 18071). All specimens were caught by commercial fishermen. A thorough review of t
. The Canadian field-naturalist. 1993 Notes 353 235 g and measured 277 mm in total length. Almost two years later, on 12 October 1992, a third Skipjack Herring was caught in 9 m of water from Lake Michigan east of Bailey's Harbor, Wisconsin, near the outlet of Moonhght Bay (longitude 87°4';, lat- itude 45°4';). This 43 cm specimen weighed kg. These last two specimens are stored at the Wisconsin Department of Natural Resources's (WDNR) Research Center in Monona, WI (catalog numbers 18070 and 18071). All specimens were caught by commercial fishermen. A thorough review of the literature turned up no other reference to the Skipjack Herring from the Great Lakes (Becker 1983; Greene 1935; Hubbs and Lagler 1964; Scott and Grossman 1973). This species' native range includes the larger rivers of the Mississippi River basin and tributaries along the Gulf of Mexico from northwest- em Florida to Texas (Lee et al. 1980). One plausible explanation for their occurrence in Green Bay and Lake Michigan would be they moved up from the Illinois River and into the Chicago Sanitary and Ship Canal and from there into Lake Michigan. This route was created in 1900 but recent improvements in water quality may have allowed this species to migrate into Lake Michigan (Com- monwealth Edison Company 1977; Metropolitan Water Reclamation District of Greater Chicago 1990). Little is known about the spawning habits of this species (Becker 1983). It is important to keep track of the expansion of any non native species into a basin or the reappearance of an extirpated species to determine if a viable population has been estab- lished. In 1989, the Skipjack Herring was put on. Figure L Skipjack Herring, Alosa chrysochloris, from Fishes of Illinois (1979) by Philip W. Smith, by per- mission of the University of Illinois Press, Urbana. Wisconsin's Endangered List based upon its recent return to the Wisconsin portion of the Mississippi River. If anyone thinks that they have collect
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