Authors
Vanessa L Lougheed, Tys Theÿsmeÿer, Tyler Smith, Patricia Chow-Fraser
Publication date
2004/1/1
Journal
Journal of Great Lakes Research
Volume
30
Issue
1
Pages
44-57
Publisher
Elsevier
Description
Carp were excluded from Cootes Paradise Marsh (Lake Ontario) in 1997 in order to improve water clarity and promote submerged plant growth. On average, turbidity at open water and vegetated areas was reduced by 40 and 60 percent, respectively, following carp exclusion. However, responses by plants and other trophic levels have been both spatially and temporally variable due in part to annual variation in environmental conditions and fish-zooplankton interactions. In 1997, an unusually cool spring delayed the migration of spawning fish, including a usually abundant planktivore population, into the marsh. This had three main effects: 1) large Daphnia were released from predation in early summer and reached unprecedented numbers (530 Daphnia/L) in open water areas, 2) despite the lack of vegetated marsh habitat, larval fish production was high due to reduced predation and abundant zooplankton prey …
Total citations
Scholar articles
VL Lougheed, T Theÿsmeÿer, T Smith, P Chow-Fraser - Journal of Great Lakes Research, 2004