Skip to main content
hyi
Banner
banner
bn

CONTROL SEA LAMPREYS IN THE CHEBOYGAN RIVER WITH STERILE MALES: STAGE 1 – ASSESSMENT PRIOR TO STERILE MALE RELEASE.

The upper Cheboygan River has been treated with lampricides on a 4-year cycle for nearly 50 years at an average treatment cost of $400,000. Upstream escapement of sea lampreys through a navigational lock near the dam has been hypothesized to be the source of infestation in the upper river. During 2011, we tested this hypothesis and estimated escapement to be between 0 and 2% (95% CI; Holbrook et al. 2014). The very low escapement rate did not support the hypothesis that escapement of adult sea lampreys from the lower river entirely supported the upper river infestation. An alternative hypothesis is that the upper river supports a sea lamprey population that completes its life cycle without entering Lake Huron. Collective results from 2013 and 2014 provide evidence that a small population of adult sea lampreys (n < 200) completed their life cycle in the upper Cheboygan River during each year and that upstream escapement rate of adult lampreys from the lower river to the upper river through the navigational lock was still low (<5%; Johnson et al. in review). Because the adult sea lamprey population in the upper Cheboygan River is small and has low immigration rates, it should be vulnerable to control tactics that reduce reproduction such as the sterile male release technique (SMRT). Here, we propose to continue collecting data during 2016 such that if sterile males are released in the upper Cheboygan River during 2017-2019, impacts to embryo viability and larval abundance can be determined by comparing pre-SMRT years with SMRT years. Our overall objective is to determine if the release of high ratios of sterile to normal males in a watershed with low adult density reduces embryo viability, larval abundance, and lampricide treatment frequency. Here, we propose to collect pre-SMRT data by completing the following tasks during 2016: (1) Estimate adult sea lamprey abundance in the upper Cheboygan River and respective contributions from a landlocked population and escapement through the lock. (2) Estimate stream-wide abundance, length frequency, and spatial distribution of larval sea lampreys in the Pigeon, Sturgeon, Maple, and Ocqueoc River before and after lampricide treatment, and (3) estimate viability of sea lamprey embryos in nests from the Pigeon, Sturgeon, Maple, Ocqueoc, and St Marys rivers.


 

Status
In progress
Type
Project
Start Date
End Date
Scope of Study
Field and Modeling
Scale of Phenomena
Ecosystem
Organism
Impact of Pollutants
Exotic Species
Resource Management
Fisheries
Lake Basin Connecting Channels
Lake Huron
State Province
Michigan
Purpose of Project
Resource Management
Trend Assessment
Resource Being Monitored
Fisheries
Biology And Life History
Population Dynamics
Control And Mitigation
Habitat Manipulation
Socio-economic Consideration and Analysis
Recreation / Tourism Impacts
General
Aquatic Nuisance Species

The Great Lakes - St. Lawrence Research Inventory is an
interactive, Internet-based, searchable database created as a tool to collect and disseminate
up-to-date information about research projects in the
Great Lakes - St. Lawrence Region.