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11-08-2010, 03:12 PM #1
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Salmonid Spawning Runs and Estimated Ova Production in Normandale Creek of Lake Erie,
By Hugh R. MacCrimmon, D. James Gordon
Journal of Great Lakes Research, Volume 7, Issue 2, 1981, Pages 155-161, ISSN 0380-1330, DOI: 10.1016/S0380-1330(81)72041-0.
The Normandale Creek study area (2,531 m2)provides spawning and nursery grounds for lake-run coho salmon (Oncorhynchus kisutch), rainbow trout (Salmo gairdneri), and brown trout (Salmo trutta), In 1973-74, 59 adult salmonids (58% rainbow trout, 39% coho salmon, and 3% brown trout) ascended the stream between 31 October and 12 May. Upstream movements were significantly related to peak stream discharge (r = 0.21) and highly significantly related to discharge occurring on the day following the peak freshet (r = 0.34). Despite a highly significant correlation (r = 0.29) between flow and water temperature, the latter factor is not significantly related with upstream movement of adult fish. Coho salmon spawned at water temperatures of 1 to 10[degree sign] C between 2 November and 19 December, rainbow trout at 1 to 15[degree sign] C between 9 November and 14 May, and brown trout at 7[degree sign] C between 4 and 5 November. Of 86 nests constructed, 60% were disturbed by re-use or sand deposition. From a calculated deposition of 90,403 ova, it is estimated that some 22% survived to emergence.