Lake Ontario, bloater (Coregonus hoyi) populations declined from the late 1800s-1900s and ultimately were extirpated from the lake by 1983 (Weidel et al. 2022). Few records exist to document critical habitats used by bloater before their extirpation (Goodyear et al....
Post Archive:
Life History
Defining bloater spawning habitat to inform potential impediments to Lake Ontario bloater reintroduction – Year 2
Bloater (Coregonus hoyi) reintroduction remains a priority for Lake Ontario management agencies. Since 2011, over 2 million bloater (age-0 through age-5) have been released into Lake Ontario without any evidence of natural reproduction by hatchery-origin individuals...
Lake Superior Bloater Reproductive Biology
Defining bloater spawning habitat to inform potential impediments to Lake Ontario bloater reintroduction
Efforts to reintroduce bloater (Coregonus hoyi) in Lake Ontario have been ongoing for 11 years (Weidel et al. 2022). Although more than 1.1 million bloater have been released, the objective of a self-sustaining population has yet to be achieved. Reintroduction efforts...
Examining the potential for unrepresentative sampling during cisco Coregonus artedi gamete collections for the Saginaw Bay restoration effort
Great Lakes cisco populations declined during the 19th and 20th centuries due to factors such as overfishing, habitat degradation, and interactions with invasive species (Van Oosten 1930; Crowder 1980; Myers et al. 2009; George 2019). Cisco are now considered...
Examining the potential for unrepresentative sampling during cisco Coregonus artedi gamete collections for the Saginaw Bay restoration effort – Year 2
The cisco Coregonus artedi restoration effort in Saginaw Bay utilizes gametes sourced from northern Lake Huron, in the Les Cheneaux Islands and Drummond Island region (LHTC 2007). Gametes have been collected from bays in the Les Cheneaux area and Whitney Bay (Drummond...
Can stocked Bloater (Coregonus hoyi) survival be increased with environmental conditioning?
Bloater (Coregonus hoyi) were historically an important component of the Lake Ontario fish community but the species was likely extirpated by the 1970’s. A binational restoration has stocked over one million Bloater into Lake Ontario since 2012, however, low...
Lake Superior ciscoe spawning and winter ecology
This proposal expands on our recent work collecting ciscoes in winter near Grand Island, Michigan. This previous Coregonine Restoration Program funded project started the process of gathering data necessary to base Kiyi (Coregonus kiyi) restoration management...
How does ecological function correspond to morphology in Great Lakes coregonines?
Human activities have caused widespread biodiversity loss, particularly in freshwater systems. For example, historical fish assemblages of the deepwater habitats of the Laurentian Great Lakes were dominated by up to eight closely related taxa from the genus Coregonus....
Movements and habitat use of cisco along a nearshore-offshore gradient in northern Lake Huron
Historically, the Great Lakes supported large and diverse cisco populations until overfishing, establishment of invasive species, and habitat loss resulted in large-scale extirpation during the mid 19th century. Managers have prioritized recovery of cisco in Lake...
Site fidelity, depth-habitat use, and reproductive behavior of ciscoes in Grand Traverse Bay, Lake Michigan
Successful reintroduction of cisco (Coregonus artedi) to the Great Lakes requires that stocked individuals are suitably adapted to environmental conditions at stocking sites. Thus, understanding how cisco ecology, life history, and behavior varies among extant...
Kiyi reproductive phenology in Lake Superior
Kiyi historically occurred in Lakes Huron, Michigan, Ontario, and Superior. Today they occur in Lake Superior. Reestablishing Kiyi into lakes where it went extinct is a topic of discussion among Laurentian Great Lakes fishery managers. An impediment to re-introducing...