Feeding ecology of lake whitefish larvae in eastern Lake Ontario

Johnson, James H.; McKenna, James E.; Chalupnicki, Marc A.; Wallbridge, Tim; Chiavelli, Rich

doi:10.1016/j.jglr.2009.08.013

Cited by 14 publications

(3 citation statements)

References 20 publications

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“…The importance of cyclopoid copepods in diets from this study is consistent with results from other studies in various systems (Chouinard & Bernatchez, 1998;Hart, 1930;Hoyle et al, 2011;Johnson, McKenna, Chalupnicki, Wallbridge, & Chiavelli, 2009;Pothoven, Höök, & Roswell, 2014). The importance of cyclopoid copepods in diets from this study is consistent with results from other studies in various systems (Chouinard & Bernatchez, 1998;Hart, 1930;Hoyle et al, 2011;Johnson, McKenna, Chalupnicki, Wallbridge, & Chiavelli, 2009;Pothoven, Höök, & Roswell, 2014).…”

Section: Discussionsupporting

confidence: 91%

“…Although there was a general tendency for the importance of cyclopoid copepods in each index to decline as fish grew, cyclopoid copepods were clearly an important food source for all sizes of age-0 Lake Whitefish. The importance of cyclopoid copepods in diets from this study is consistent with results from other studies in various systems (Chouinard & Bernatchez, 1998;Hart, 1930;Hoyle et al, 2011;Johnson, McKenna, Chalupnicki, Wallbridge, & Chiavelli, 2009;Pothoven, Höök, & Roswell, 2014). A study in the Bay of Quinte, Lake Ontario, found a correlation between cyclopoid and juvenile Lake Whitefish abundances (Hoyle et al, 2011).…”

Section: Discussionsupporting

confidence: 90%

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The influence of ontogeny and prey abundance on feeding ecology of age‐0 Lake Whitefish (Coregonus clupeaformis) in southeastern Lake Michigan

Pothoven

2019

Ecology of Freshwater Fish

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A shift towards oligotrophic conditions in Lake Michigan has led to concern that altered trophic pathways are leading to lower early life survival and recruitment for Lake Whitefish (Coregonus clupeaformis). This study evaluated ontogenetic shifts in age‐0 Lake Whitefish diets and evaluated how feeding ecology and the amount of food eaten varied with prey abundance and composition at a site in southeastern Lake Michigan during 2014–2017. Although prey densities varied among years, cyclopoid copepods were overall the most abundant prey available. In turn, cyclopoids were the predominant prey item in diets each year, particularly for the smallest larval Lake Whitefish. However, there was a tendency for the importance of cyclopoids to decline somewhat in each diet index as fish grew and other prey such as calanoid copepods, Bosminidae, Daphniidae and/or chironomids increased in importance. High zooplankton abundance, especially high cyclopoid abundance, available to the small size groups of Lake Whitefish (<21 mm) in 2014 was associated with high food mass/fish, high number of zooplankton eaten/fish, and low incidence of empty stomachs compared with 2015–2017. As fish grew, the impact of food abundance on prey consumption diminished somewhat, indicating that the relationship between fish feeding ecology and the prey environment can change quickly with fish size during the early life period.

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Section: Discussionsupporting

confidence: 91%

Section: Discussionsupporting

confidence: 90%

The influence of ontogeny and prey abundance on feeding ecology of age‐0 Lake Whitefish (Coregonus clupeaformis) in southeastern Lake Michigan

Pothoven

2019

Ecology of Freshwater Fish

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“…Davis and Todd (1998) found high diet overlap (70%–90%) between larval cisco and lake whitefish in mesocosm experiments and concluded that larval lake whitefish may outcompete cisco for zooplankton prey due to their higher growth rates and larger gape sizes. Larvae of both species are generalist planktivores that often consume the most abundant and largest zooplankton taxa allowed by their gape size (Johnson et al, 2009; Lucke et al, 2020; Selgeby et al, 1994). Cyclopoid copepods are an important prey source for both species (Davis & Todd, 1998; Hoyle et al, 2011; Pothoven et al, 2014; Pothoven, 2020; Lucke et al, 2020), which is likely due to their large size relative to larval gape limitations and high abundances when larval coregonines begin exogenously feeding.…”

Section: Discussionmentioning

confidence: 99%

Larval cisco and lake whitefish exhibit high distributional overlap within nursery areas

Brown,

Rudstam,

Holden

et al. 2023

Ecology of Freshwater Fish

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Coregonine fishes, including lake whitefish (Coregonus clupeaformis) and cisco (C. artedi), are socioecologically important in the Laurentian Great Lakes and of conservation concern, but the processes driving recruitment variability are unclear. In Lake Ontario, cisco and lake whitefish exhibit similar spawning behaviours and early life histories, but population trajectories are diverging. One hypothesis is that sympatric cisco and lake whitefish larvae occupy distinct habitats and experience dissimilar local environmental conditions, despite co‐occurrence within nursery areas. We described the spatiotemporal distributions of larval cisco and lake whitefish among multiple Lake Ontario embayment nursery areas, characterised physical habitat features associated with their distributions, determined the degree of spatial habitat partitioning between species and evaluated how habitat niche divergence occurred along an ontogenetic progression. Both species were widely distributed across larval nursery areas, though lake whitefish were less abundant and more narrowly distributed than cisco. Within the yolk sac stage, lake whitefish occupied more nearshore, shallower and colder waters than cisco, indicating potential habitat niche partitioning between congeners. However, distributional differences were subtle and likely driven by differential hatch timing and staggered ontogenetic habitat shifts. Combined, our results illustrate similar habitat use between cisco and lake whitefish through the larval stage and demonstrate that ontogeny and species‐specific phenology influence habitat use for these species. This study provides additional evidence that the early life histories of cisco and lake whitefish are highly similar and does not support the hypothesis that larval habitat use differences are a major driver of differential recruitment success for these species.

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Products of biotransformation of polycyclic aromatic hydrocarbons in fishes of the Athabasca/Slave river system, Canada

Ohiozebau

Tendler

Hill

et al. 2015

Environ Geochem Health

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Concentrations of products of biotransformation of polycyclic aromatic hydrocarbons (PBPAH) were measured in bile of five fishes of nutritional, cultural and ecological relevance from the Athabasca/Slave river system. Samples were collected in Alberta and the Northwest Territories, Canada, during three seasons. As a measure of concentrations of PBPAHs to which fishes are exposed and to gain information on the nature and extent of potential exposures of people or piscivorous wildlife, concentrations of biotransformation products of two- and three-ringed, four-ringed and five-ringed PAHs were measured using synchronous fluorescence spectroscopy. Spatial and seasonal differences were observed with greater concentrations of PBPAHs in samples of bile of fish collected from Fort McKay as well as greater concentrations of PBPAHs in bile of fish collected during summer compared to those collected in other seasons. Overall, PBPAHs were greater in fishes of lower trophic levels and fishes more closely associated with sediments. In particular, goldeye (Hiodon alosoides), consistently contained greater concentrations of all the PBPAHs studied.

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Feeding ecology of lake whitefish larvae in eastern Lake Ontario

Cited by 14 publications

References 20 publications

The influence of ontogeny and prey abundance on feeding ecology of age‐0 Lake Whitefish (Coregonus clupeaformis) in southeastern Lake Michigan

The influence of ontogeny and prey abundance on feeding ecology of age‐0 Lake Whitefish (Coregonus clupeaformis) in southeastern Lake Michigan

Larval cisco and lake whitefish exhibit high distributional overlap within nursery areas

Products of biotransformation of polycyclic aromatic hydrocarbons in fishes of the Athabasca/Slave river system, Canada

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