(chubsuckers) 0.06 0.06 0.03 Ictalurus punctatus (channel catfish) 0.01 0.01 0.01 Menidia beryllina (inland silverside) 0.13 0.17 0.06 Menidia menidia (Atlantic silverside) -- -- -- Syngnathus fuscus (Northern pipefish) -- -- -- Lepomis gibbosus (pumpkinseed) 0.01 0.01 0.01 Perca flaoescens (yellow perch) 0.03 0.06 0.04 Morone americana
(white perch) 0.80 160.59 74.80 Morone saxatilis (striped bass) 0.31 5.61 2.28 Pomoxis annularis (white crappie) 0.24 0.45 0.13 Sciaenidae spp.
Seven species are introduced in the Chicago region: Common Carp (Cyprinus carpio), Alewife (Alosa pseudoharengus), Goldfish (Carassius auratus), Chinook Salmon (Oncorhynchus tshawytseha), Redear Sunfish (Lepomis microlophus), White Perch (Morone americana
), and Round Goby (Neogobius melanostomus), but many others owe their presence in Wolf Lake to human intervention.
heteroclitus 33 0.8-90.6 Largemouth bass (1) Micropterus salmoides 100 2.5-100.0 Weakfish (2) Cynoscion regalis 50 1.3-98.7 Spot (27) Leiostomus xanthurus 7 0.9-24.3 White perch (87) Morone americana
20 11.8-29.4 Table 2.
Endocrine disruption and altered gonadal development in white perch (Morone americana
) from the lower Great Lakes region.
The present species were: Dorosomacepedianum , Carassius auratus , Ictalurus punctatus, Oncorhynchus tshawytscha, Labidesthes sicculus, Morone americana
, and Aplodinotus grunniens.
Depending on size, and therefore amount of fish tissue, samples were analyzed as composites or individually Because of their large size, carp (Cyprinus carpio) and white perch (Morone americana
) were analyzed as individual samples, while the smaller fish, white crappies (Pomoxis annularis) and bluegills (Lepomis macrochirus), were analyzed as composite samples.
Nine species including rainbow smelt (Osmerus mordax), white perch (Morone americana
), and round goby (Apollonia melanostoma), have crossed from Lake Michigan into the Illinois River system using the Chicago Sanitary and Ship Canal to expand their range from Lake Michigan to the Illinois River drainage.
However, intersex gonads were observed in 8 of 16 male white perch (Morone americana
) examined in this survey.
Contingent migration structure has been observed across diverse taxa, such as American eels (Anguilla rostrata), American shad (Alosa sapidissima), white perch (Morone americana
), bluefish (Pomatomus saltatrix), and Atlantic bluefin tuna (Secor, 1999, in press; Fromentin and Powers, 2005).
We selected the white perch (Morone americana
) as the sentinel fish species because of its abundance at all of the collection sites.
In addition, the white perch (Morone americana
), striped bass (Morone saxatilis), and three-spine stickleback (Gasterosteus aculeatus), all non-indigenous species, have extended their range into the Grand Calumet River, Little Calumet River, and Lake Michigan nearshore.
Gizzard shad, white perch (Morone americana
), and anadromous herrings (Alosa pseudoharengus and Alosa aestivalis) were the main constituents of the diet of both sizes of striped bass in the tidal freshwater region (Table 3, Fig.