The life history characteristics, growth and density of Mysis diluviana in Lake Pend Oreille, Idaho, USA

Caldwell, Timothy J.; Wilhelm, Frank M.

doi:10.1016/j.jglr.2011.07.010

Cited by 13 publications

(10 citation statements)

References 52 publications

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“…Regional prey surveys provide a consistent weekly assessment of mysid density across the study area, while local surveys assess density alongside a foraging whale. When compared to the limited number of other studies that have used acoustic methods to evaluate mysids, the average density values we found here are within the range (56–2,471 individuals/m 2 ) determined by Caldwell and Wilhelm () for a freshwater mysid and (714–15,541 individuals/m 3 ) for marine species (Kaltenberg and Benoit‐Bird ). However, as emphasized by a number of authors, due to elements of both predation and production, fine‐scale zooplankton patch dynamics can fluctuate faster than what is easily measured using traditional field methods (Reid et al .…”

Section: Discussionsupporting

confidence: 82%

Threshold foraging by gray whales in response to fine scale variations in mysid density

Feyrer

Duffus

2014

Marine Mammal Science

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The gray whale (Eschrichtius robustus) is a coastal species whose nearshore summer foraging grounds off the coast of British Columbia offer an opportunity to study the fine scale foraging response of baleen whales. We explore the relationship between prey density and gray whale foraging starting with regional scale (10 km) assessments of whale density (per square kilometer) and foraging effort as a response to regional mysid density (per cubic meter), between 2006 and 2007. In addition we measure prey density at a local scale (100 m), while following foraging whales during focal surveys. We found regional mysid density had a significant positive relationship with both gray whale density and foraging effort. We identify a threshold response to regional mysid density for both whale density and foraging effort. In 2008 the lowest average local prey density measured beside a foraging whale was 2,300 mysids/m3. This level was maintained even when regional prey density was found to be substantially lower. Similar to other baleen whales, the foraging behavior of gray whales suggests a threshold response to prey density and a complex appreciation of prey availability across fine scales.

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Section: Discussionsupporting

confidence: 82%

Threshold foraging by gray whales in response to fine scale variations in mysid density

Feyrer

Duffus

2014

Marine Mammal Science

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“…Similar patterns have been observed in other lakes (Johannsson et al 2001;Whall and Lasenby 2009). The correlation between the consumption of cladocerans presented here and increased rate of growth by mysids (Caldwell and Wilhelm 2012) suggests that cladocerans may be important prey to mysids.…”

Section: Seasonal Diet and Prey Selectionsupporting

confidence: 89%

“…This may also be the case in LPO. Caldwell and Wilhelm (2012) observed little to no growth in mysids during the winter months (Nov -Mar) in LPO. The consumption of less preferred food sources (i.e., diatoms and copepods) may cause the allocation of energy to prey capture rather than to growth and reproduction (Nordin et al 2008).…”

Section: Seasonal Diet and Prey Selectionmentioning

confidence: 79%

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Non-native pelagic macroinvertebrate alters population dynamics of herbivorous zooplankton in a large deep lake

Caldwell

Wilhelm

Dux

2016

Can. J. Fish. Aquat. Sci.

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Establishment of non-native species can alter native species populations and restructure lake food webs through complex tropic interactions such as intraguild predation or classic trophic cascades. Although the freshwater shrimp Mysis diluviana is well known for its ability to impact both primary and secondary productivity through omnivorous feeding in aquatic ecosystems in which it has been introduced, empirical evidence of mysid consumption of zooplankton prey and associated impacts on cladoceran communities from the same lake is uncommon. Furthermore, recent literature has suggested that mysids may impact other zooplankton populations outside of cladocerans. To test the hypothesis that introduced mysids negatively affect the seasonal abundance of cladocerans in Lake Pend Oreille, a large and deep (348 km2, max. depth: 352 m) lake in Idaho, USA, we quantified the seasonal diet and consumption rates of mysids and compared them with cladoceran production rates. During isothermal conditions, mysids opportunistically fed on copepods, diatoms, and rotifers. However, during stratification, mysids strongly selected cladocerans. In addition, during isothermal conditions, mysids consumed 100% of cladoceran production and selected reproductive-sized individuals. We interpret this to show that mysids regulate the production of cladocerans when the lake is not stratified. The suppression of cladocerans in the spring coincides with the appearance of kokanee (Oncorhynchus nerka) fry whose growth and survival may be negatively affected by the lack of abundant cladocerans, a preferred prey. This suggests a possible cascading effect to higher trophic levels.

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“…Mysid abundances in Lake Huron's Main Basin rank higher relative to those reported for Lake Erie but below estimates for the other 3 Great Lakes (Jude et al 2018). Mysid densities also vary substantially among lakes (Scharf and Koschel 2004;Boscarino et al 2009;Hrycik et al 2015) and demonstrate spatiotemporal variation within individual ecosystems (Caldwell and Wilhelm 2012;Jude et al 2018); quantification of such variability is essential for understanding their whole ecosystem impacts (Spencer et al 1991;Caldwell and Wilhelm 2012). Sprules and Bowerman (1988) demonstrated increased trophic complexity within the zooplankton communities in mysid-inhabited lakes relative to systems where this large zooplankter is absent.…”

Section: Discussionmentioning

confidence: 92%

Basin‐Specific Pollutant Bioaccumulation Patterns Define Lake Huron Forage Fish

Paterson

Pierdomenico

Haffner

2020

Enviro Toxic and Chemistry

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The Lake Huron ecosystem is unique among the Laurentian Great Lakes (USA/Canada) in that its surface area encompasses 3 distinct basins. This ecosystem recently experienced significant ecological restructuring characterized by changes in primary production, species dominance and abundances, and top predator energy dynamics. However, much of the evidence for this restructuring has been largely derived from biomonitoring data obtained from long‐term sampling of the lake's Main Basin. We examined polychlorinated biphenyl (PCB) concentrations and the stable isotopes of carbon (δ13C) and nitrogen (δ15N) in rainbow smelt (Osmerus mordax), bloater (Coregonus hoyi), and round goby (Neogobius melanostomus) to determine spatial variability in these environmental markers as indicators of the ubiquity of trophic restructuring throughout Lake Huron. Stable isotopes indicated that North Channel fish occupied trophic positions between 0.5 and 1.0 lower relative to Main Basin and Georgian Bay conspecifics, respectively. Sum PCB concentrations for 41 congeners were highest for fish from the Main Basin (27.5 ± 3.0 ng g−1 wet wt) and Georgian Bay (26.3 ± 3.4 ng g−1 wet wt) relative to North Channel (13.6 ± 1.2 ng g−1 wet wt) fish. Discriminant functions analysis demonstrated basin‐specific PCB congener profiles with individual species also having distinct profiles dependent on their basin of collection. These bioaccumulation patterns among Lake Huron forage fish mirror those reported for lake trout in this lake and indicate that the degree of food‐web ecological restructuring in Lake Huron is not equivalent across the basins. Specifically, basin‐specific PCB congener profiles demonstrated that differences among Lake Huron secondary and top predator consumer species are likely dictated by cross‐basin differences in zooplankton community ecology and trophodynamics that can regulate the efficiencies of prey energy transfer and PCB congener bioaccumulation patterns in aquatic food webs. Environ Toxicol Chem 2020;39:1712–1723. © 2020 SETAC

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The life history characteristics, growth and density of Mysis diluviana in Lake Pend Oreille, Idaho, USA

Cited by 13 publications

References 52 publications

Threshold foraging by gray whales in response to fine scale variations in mysid density

Threshold foraging by gray whales in response to fine scale variations in mysid density

Non-native pelagic macroinvertebrate alters population dynamics of herbivorous zooplankton in a large deep lake

Basin‐Specific Pollutant Bioaccumulation Patterns Define Lake Huron Forage Fish

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