Updated 2021-01-20 16:20:34
Lake Ontario -> 3.0 Deep Pelagic And Offshore Benthic Zone Goal -> Sea Lamprey
Reporting Interval
2014 - 2019
Area
Meeting Target?
Meets
Indicator Trend
Downward trend
Confidence?
High
Number of A-1 wounds on Lake Trout and other species below targets
Lake Ontario continues to have outstanding Sea Lamprey Control. The number of A1 wounds on Lake Trout ≥ 432 mm was below the target of 2 A1 wounds per 100 Lake Trout in all years during the reporting period (2014-2019) and the wounding rates from 2017 – 2019 are some of the lowest in the time series.
Figure 1. Number of A1 wounds inflicted by Sea Lamprey per 100 Lake Trout ≥ 432mm caught during standard assessment netting in New York waters of Lake Ontario 1983 – 2019. Horizontal line represents the target of 2 A1 wounds per 100 Lake Trout
Methodology
All Lake Trout captured during the standard Lake Trout gill net assessment in New York waters of Lake Ontario were examined for Sea Lamprey wounds. Sea Lamprey wounds were counted and graded according to King and Edsall (1979) and Ebener et al. (2006).
Other Resources
Lantry. B. F, S. L. Furgal, B. C. Weidel, M. J. Connerton, D. Gorsky, and C. Osborne. 2020. Lake Trout rehabilitation in Lake Ontario, 2019. Section 5 in NYSDEC 2019 Annual Report, Bureau of Fisheries, Lake Ontario Unit and St. Lawrence River Unit to the Great Lakes Fishery Commission’s Lake Ontario Committee.
Ebener, M. P., E. L. King, Jr., and T. A. Edsall. 2006. Application of a dichotomous key to the classification of sea lamprey marks on Great Lakes fish. Great Lakes Fishery Commission Miscellaneous Publication 2006-2.
King, E. L. Jr. and T. A. Edsall. 1979. Illustrated field guide for the classification of sea lamprey attack marks on Great Lakes lake trout. Great Lakes Fishery Commission Special Publication 70-1.
Contributing Author(s)
- Christopher Legard - NYDEC
- Brian Lantry - USGS