Chris Olds's research while affiliated with U.S. Fish and Wildlife Service and other places
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Publications (8)
Here we determine how traditional morphometrics (TM) compares with geometric morphometrics (GM) in discriminating among morphologies of four forms of ciscoes of the Coregonus artedi complex collected from Lake Huron. One of the forms comprised two groups of the same deepwater cisco separated by capture depth, whereas the other three forms were shal...
What was formerly viewed as one species within a species flock endemic to the Great Lakes, cisco (Coregonus artedi) is recognized now as a group of ecomorphs that inhabited the shallow waters of each Great Lake. In Lake Huron, two ecomorphs, typical artedi, a widespread dominant, and manitoulinus, reported only from one location in the North Channe...
Various ecomorphs of shallow‐water Cisco Coregonus artedi were the dominant fish planktivores in each of the Great Lakes until invasive species and over fishing resulted in extirpations and extinctions. In this paper we describe the present morphological diversity and distribution of shallow‐water Ciscoes in each of Lake Huron’s three basins: the m...
The U.S. Geological Survey Great Lakes Science Center has conducted integrated acoustic and mid-water trawl surveys of Lake Huron during 1997 and annually from 2004-2016. The 2016 survey was conducted during September and early October and included transects in Lake Huron’s main basin, Georgian Bay, and North Channel. Mean lake-wide pelagic fish de...
The USGS Great Lakes Science Center has conducted integrated acoustic and mid-water trawl surveys of Lake Huron during 1997 and annually from 2004-2015. The 2015 survey was conducted during September and included transects in Lake Huron's main basin, Georgian Bay, and North Channel. Mean lake-wide total pelagic fish density was 1,313 fish/ha and me...
The USGS Great Lakes Science Center has conducted integrated acoustic and mid-water trawl surveys of Lake Huron during 1997 and annually from 2004-2015. The 2015 survey was conducted during September and included transects in Lake Huron's main basin, Georgian Bay, and North Channel. Mean lake-wide total pelagic fish density was 1,313 fish/ha and me...
Citations
... However, Eshenroder et al. (2016) described a new, putatively hybridized deepwater form in Lake Huron, which they called hybrida. Since then, Eshenroder et al. (2021b) described another form of shallow-water cisco from Lake Huron, which they named shorthead cisco (Latinized names not used for newly described forms). In this paper, we will be referring to different forms of cisco from Lake Huron with names of convenience and authors as follows: typical artedi of Lake Huron (C. ...
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... a. artedi of Koelz), manitoulinus of Lake Huron (C. a. manitoulinus of Koelz), shorthead cisco of Lake Huron (Eshenroder et al. 2021a), and hybrida of Lake Huron, which was inferred by Eshenroder et al. (2016) to be a hybrid swarm. Functionally, the forms of cisco in this paper can be considered either shallow-water or deepwater ciscoes (the name deepwater not hyphenated owing to precedent). ...
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... The Laurentian Great Lakes have experienced substantial changes in nutrient inputs, productivity, fish composition, and biomass (Bunnell et al., 2014;O'Brien et al., 2016). To maintain and enhance their ecosystem services after substantial anthropogenic changes, the lakes have been subject to many management strategies in the last few decades, such as stocking of salmonid piscivores (Dobiesz et al., 2005) and reducing nutrient input to control the extent of eutrophication (Paterson et al., 2014). ...
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