Effects of changes in density-dependent growth and recruitment on sustainable harvest of lake whitefish

Gobin, Jenilee; Lester, Nigel P.; Fox, Michael G.; Dunlop, Erin S.

doi:10.1016/j.jglr.2016.05.003

Cited by 23 publications

(45 citation statements)

References 48 publications

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“…On the other hand, Gobin et al. (2016) show an overall positive relationship between lake whitefish biomass and juvenile growth in QMA OH4‐5. They further suggest that site‐specific changes in lake whitefish density may be driven more so by variation in habitat quality, which could determine growth rate and carrying capacity, than to variation in fishing mortality.…”

Section: Discussionmentioning

confidence: 92%

“…For example, fisheries‐induced evolution can be buffered by negative density dependence in somatic growth rate that is the outcome of intraspecific competition for limiting resources (Dunlop et al., 2015; Gobin et al., 2016). On the one hand, Healey (1980) provides experimental evidence of fisheries‐induced, negative density‐dependent growth at the whole lake level in small lakes, and Lorenzen and Enberg (2002) discuss more generally the importance of considering negative density‐dependent growth as a population regulation mechanism in fish populations.…”

Section: Discussionmentioning

confidence: 99%

“…This allows for feedbacks between ecological and evolutionary processes in response to alternative forms and intensities of size‐selective fishing (Dunlop, Eikeset, & Stenseth, 2015; Dunlop, Heino et al., 2009; Wang & Höök, 2009). Eco‐genetic modeling also has been used to explore how different intensities of density‐dependent growth affect population dynamics and stock productivity (Gobin, Lester, Fox, & Dunlop, 2016). Intrinsic growth rate also has been treated as a decision variable in models of size‐selective fisheries (Dunlop, Heino et al., 2009; Eikeset et al., 2016).…”

Section: Introductionmentioning

confidence: 99%

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Size‐selective fishing and the potential for fisheries‐induced evolution in lake whitefish

Morbey

Mema

2018

Evolutionary Applications

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The long‐term evolutionary effects of fishing on maturation schedules can depend on gear type, the shape of the gear type's size‐selectivity function, and the size and age structure of a population. Our goal was to better understand how environmentally induced differences in somatic growth influence the evolutionary effects of size‐selective fisheries, using lake whitefish (Coregonus clupeaformis) in Lake Huron as a case study. Using a state‐dependent optimization model of energy allocation parameterized for lake whitefish, we show that fishing with gill nets (bell‐shaped selectivity) and trap nets (sigmoid‐shaped selectivity) can be potent agents of selection on size thresholds for maturity. Compared to trap nets and large mesh (114 mm) gill nets, small mesh (89 mm) gill nets are better able to buffer populations from fishing‐induced evolution by safeguarding large, fecund fish, but only when overall fishing mortality is low and growth rates sufficiently fast such that fish can outgrow vulnerable size classes. Regardless of gear type, and all else being equal, high fishing mortality in combination with low growth rates is expected to intensify the long‐term evolutionary effects of fishing.

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Section: Discussionmentioning

confidence: 92%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Size‐selective fishing and the potential for fisheries‐induced evolution in lake whitefish

Morbey

Mema

2018

Evolutionary Applications

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“…These changes have likely caused a reduction in the amount of harvest the populations can sustainably support, as is predicted from a harvest model built for the southern main basin of Lake Huron (Gobin et al. ). Given the large size and complexity of the Great Lakes, it is notable that the effects of dreissenid mussels on lake whitefish were as consistent as they were.…”

Section: Discussionmentioning

confidence: 99%

Broad shifts in the resource use of a commercially harvested fish following the invasion of dreissenid mussels

Fera

Rennie

Dunlop

2017

Ecology

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Dreissenid mussels, including the zebra (Dreissena polymorpha) and quagga (Dreissena rostiformus bugensis) mussel, are invasive species known for their capacity to act as ecosystem engineers. They have caused significant changes in the many freshwater systems they have invaded by increasing water clarity, reducing primary productivity, and altering zooplankton and benthic invertebrate assemblages. What is less clear is how their ecosystem engineering effects manifest up the food web to impact higher trophic levels, including fish. Here, we use a biological tracer (stable isotopes of carbon and nitrogen) to analyze long-term and broad-scale trends in the resource use of benthivorous lake whitefish (Coregonus clupeaformis) in the Laurentian Great Lakes, where dreissenid mussels have become established in each lake except Lake Superior. We measured stable isotope ratios from archived material (fish scale samples) collected over several decades by multiple agencies and from 14 locations around the Great Lakes. In the majority of locations, the δ C of lake whitefish increased following the establishment of dreissenid mussels. Trends in δ N were less clear, but significant breakpoints in the time series occurred within 5 yr of dreissenid establishment in several locations, followed by declines in δ N. In contrast, isotopic signatures in Lake Superior locations did not show these trends. Our results provide evidence that lake whitefish shifted toward greater reliance on nearshore benthic production, supporting the theory that fundamental energy pathways are changed when dreissenid mussels become established. Importantly, these effects were noted across multiple, large, and complex ecosystems spanning a broad geographic area. Our study underscores the potential for aquatic invasive species to alter key ecosystem services as demonstrated here through their impacts on energy pathways supporting a commercially harvested fish species.

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“…most economically valuable and culturally important fisheries in the Laurentian Great Lakes, the Lake Whitefish Coregonus clupeaformis fishery (Brenden et al, 2010;Ebener et al, 2008;Gobin, Lester, Cottrill, Fox, & Dunlop, 2015;Gobin, Lester, Fox, & Dunlop, 2016;Hoyle, Johannsson, & Bowen, 2011). Changes in adult Lake Whitefish diets and declines in their condition and growth have been attributed to the changing food web in the Great Lakes (Lumb, Johnson, Cook, & Hoyle, 2007;Pothoven, Nalepa, Schneeberger, & Brandt, 2001;Rennie, Sprules, & Johnson, 2009).…”

mentioning

confidence: 99%

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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Effects of changes in density-dependent growth and recruitment on sustainable harvest of lake whitefish

Cited by 23 publications

References 48 publications

Size‐selective fishing and the potential for fisheries‐induced evolution in lake whitefish

Size‐selective fishing and the potential for fisheries‐induced evolution in lake whitefish

Broad shifts in the resource use of a commercially harvested fish following the invasion of dreissenid mussels

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

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