Post Archive:
reproduction
Lake Superior Bloater Reproductive Biology
Do hardened shoreline habitats help or hurt? Quantifying the extent of coregonine spawning and egg incubation suitability on human-modified habitats in Lake Ontario
Conserving and restoring Cisco (Coregonus artedi) and Lake Whitefish (C. clupeaformis) populations is a management objective within individual Great Lakes and at the basin scale. Similar to other fishes of conservation concern, anthropogenic changes to spawning...
How have changes to coregonine spawning habitat influenced reproductive success?
Lake Ontario’s Cisco, Coregonus artedi, and Lake Whitefish, Coregonus clupeaformis populations have declined for centuries and surveys suggest populations are impeded during early life stages. This project developed methods to quantify habitat specific coregonine egg...
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...
Identifying and characterizing coregonine spawning habitat in Lake Erie
During the fall of 2021 and 2022, Lake Whitefish egg deposition was assessed using egg mats and egg pumping along the southern shore of the central and eastern basins in Lake Erie. Sampling was conducted at 12 different locations with 111 individual sites sampled over...
Implementation of a gap analysis: comparing historical and contemporary coregonine habitat use in the Great Lakes
Understanding and comparing historic and contemporary habitat use and distributions of coregonines (Gap Analysis, Box 2) has been deemed essential to inform all boxes (Planning Phase) of the Great Lakes coregonine restoration framework (CRF). We are requesting support...
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...
Inventory and assessment of coregonine spawning locations in lakes Erie and Ontario, including connecting channels
This project involved two phases. First, to identify locations of key habitats for coregonines in lakes Erie and Ontario and their respective connecting channels, we conducted a literature review of historical spawning, nursery, and adult habitat sites where...
Dedicated surveys to describe the distribution and abundance of a remnant cisco population in Green Bay
Contemporary spawning of cisco and lake whitefish is not known to occur in southern Green Bay but in recent years a small number (< 10 per year) of cisco adults have been recovered along the Door Peninsula, and lake whitefish larvae have been captured in drift...
Spatio-statistical modeling and field validation of coregonine spawning and nursery locations for the Great Lakes, including connecting channels and major tributaries
This research builds on the spawning habitat inventory work [GLRI: Inventory and assessment of coregonine spawning locations in lakes Erie and Ontario, including connecting channels] by using data gleaned from the previous study to develop descriptive and predictive...
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...