scholarly journals Spatiotemporal variability in energetic condition of alewife and round goby in Lake Michigan

2019 ◽  
Vol 76 (11) ◽  
pp. 1982-1992 ◽  
Author(s):  
David B. Bunnell ◽  
Steven A. Pothoven ◽  
Patricia M. Armenio ◽  
Lauren Eaton ◽  
David M. Warner ◽  
...  
Keyword(s):  
Great Lakes ◽  
Lake Michigan ◽  
Round Goby ◽  
Neogobius Melanostomus ◽  
Spatiotemporal Variability ◽  
Future Research ◽  
Alosa Pseudoharengus ◽  
Prey Fish ◽  
Important Prey ◽  
Energetic Condition

Pelagic-oriented alewife (Alosa pseudoharengus) and benthic-oriented round goby (Neogobius melanostomus) are two important prey fishes in the Laurentian Great Lakes. In 2015, we evaluated their seasonal total energy (TE) across nine Lake Michigan transects. Round goby contained at least 48% more kilojoules of TE than alewife of equal length during spring and summer. TE varied spatially for both species, but only large alewife exhibited a consistent pattern, with higher values along the eastern shoreline. Variation in TE was not explained by site-specific prey densities for either species. Round goby energy density (ED) was higher in Lake Michigan than in central Lake Erie, but comparable to other regions of the Great Lakes. Alewife ED in 2015 was similar to that in 2002–2004 in Lake Michigan, with the exception of November (small alewife ED was 21% higher) and April (large alewife ED was 30% lower). Despite oligotrophication, our study suggests that starvation of juvenile and adults has not been directly contributing to overall declining prey fish abundance, although future research should evaluate the potential for overwinter starvation.

Forecasting the distribution of the invasive round goby (Neogobius melanostomus) in Wisconsin tributaries to Lake Michigan

2010 ◽  
Vol 67 (3) ◽  
pp. 553-562 ◽  
Author(s):  
Matthew S. Kornis ◽  
M. Jake Vander Zanden
Keyword(s):  
Invasive Species ◽  
Great Lakes ◽  
Native Species ◽  
Lake Michigan ◽  
Round Goby ◽  
Neogobius Melanostomus ◽  
Small Streams ◽  
Large Populations ◽  
Round Gobies ◽  
Watershed Slope

The Laurentian Great Lakes host more than 180 non-native species, including several that have resulted in major economic and ecological effects. This list includes the round goby ( Neogobius melanostomus ), an aggressive, benthic Ponto-Caspian fish that has established large populations in coastal Great Lakes habitats. Here, we document the inland dispersal of round gobies into Wisconsin tributaries of Lake Michigan. Round gobies were detected in 26 of 73 streams (36%) and found >10 km upstream of Lake Michigan in nine watersheds. Round goby presence–absence was modeled using landscape-scale data from these invaded streams. We forecasted the future spread of round goby within Wisconsin’s Lake Michigan basin using our best model (80% accuracy), which included watershed area, stream gradient, and watershed slope as predictors. Round gobies were predicted to invade 1369 km of stream habitat up to the first stream barrier, and 8878 km of stream was identified as suitable looking beyond barriers at the broader Lake Michigan watershed (Wisconsin only). Our results depict the Great Lakes as a springboard for invasive species to disperse into inland ecosystems and, because round gobies are not usually reported in small streams in their native range, emphasize the utility of data from invaded regions when forecasting invasive species distributions.

Habitat Use and Diet of the Round Goby (Neogobius melanostomus) in Coastal Areas of Lake Michigan and Lake Huron

2009 ◽  
Vol 24 (3) ◽  
pp. 477-488 ◽  
Author(s):  
Matthew J. Cooper ◽  
Carl R. Ruetz ◽  
Donald G. Uzarski ◽  
Betsy M. Shafer
Keyword(s):  
Habitat Use ◽  
Lake Michigan ◽  
Round Goby ◽  
Coastal Areas ◽  
Neogobius Melanostomus ◽  
Lake Huron

Fatty acid signatures of Lake Michigan prey fish and invertebrates: among-species differences and spatiotemporal variability

2011 ◽  
Vol 68 (7) ◽  
pp. 1211-1230 ◽  
Author(s):  
Sergiusz J. Czesny ◽  
Jacques Rinchard ◽  
S. Dale Hanson ◽  
John M. Dettmers ◽  
Konrad Dabrowski
Keyword(s):  
Fatty Acids ◽  
Fatty Acid ◽  
Fatty Acid Profile ◽  
Lake Michigan ◽  
Function Analysis ◽  
Freshwater Ecosystems ◽  
Neogobius Melanostomus ◽  
Spatiotemporal Variability ◽  
Sampling Location ◽  
Intraspecies Variation

Lipid concentration and fatty acid composition of common prey species or taxonomic groups from four distinct regions of Lake Michigan were quantified (n = 894). We used a combination of parametric and nonparametric statistics to assess the differences in fatty acid signatures (FAS) among species and to evaluate intraspecies variation relative to interspecies variation in FAS. Discriminant function analysis performed on 13 species or taxa groups using the 18 most abundant fatty acids revealed clear separation among taxa, with overall classification success reaching 89%. Species were readily distinguished based on their overall fatty acid profile in spite of intraspecies variation (temporal, regional, and size-related). Among species sampled, pelagic and benthic clusters were formed based on the degree of fatty acid profile similarity. In alewife ( Alosa pseudoharengus ) and round goby ( Neogobius melanostomus ), fatty acid compositions differed with fish size, sampling location, and temporal variation; however, the magnitude of these differences was small relative to differences between species. Our results demonstrate the utility of fatty acid signatures in studies of food webs in large freshwater ecosystems. This study is also a necessary first step toward development of mechanistic research that investigates the effects of variation in fatty acids within the prey base on top predators.

scholarly journals Ecological responses to elevated water temperatures across invasive populations of the round goby (Neogobius melanostomus) in the Great Lakes basin

2021 ◽  
Author(s):  
Heather Bauer Reid ◽  
Anthony Ricciardi
Keyword(s):  
Great Lakes ◽  
Climate Warming ◽  
Native Species ◽  
Elevated Temperatures ◽  
Round Goby ◽  
Neogobius Melanostomus ◽  
Acclimation Temperature ◽  
Feeding Rates ◽  
Western Basin ◽  
St Lawrence River

Climate warming is expected to alter the distribution, abundance, and impact of non-native species in aquatic ecosystems. In laboratory experiments, we measured the maximum feeding rate and critical thermal maximum (CTmax) of an invasive Eurasian fish, the round goby (Neogobius melanostomus), acclimated to a range of temperatures (18–28°C) reflecting current and projected future thermal conditions for the nearshore Great Lakes. Fish were collected from four distinct populations along a latitudinal gradient from the western basin of Lake Erie to Hamilton Harbour (Lake Ontario) and the upper St. Lawrence River. Thermal tolerance increased with acclimation temperature for populations in lakes Erie and Ontario. However, the St. Lawrence River populations had lower acclimation capacity and exhibited an unexpected decline in CTmax at the highest acclimation temperature. Maximum feeding rates peaked at 18–24°C and declined with temperatures above 24°C. Northern populations in the basin appear poorly adapted to elevated temperatures such that their performance and impact could be reduced by climate warming. Thermal response data from latitudinally distributed populations are needed to inform invasive species risk assessment.

Spatial variability of lake trout diets in Lakes Huron and Michigan revealed by stomach content and fatty acid profiles

2018 ◽  
Vol 75 (1) ◽  
pp. 95-105 ◽  
Author(s):  
Austin Happel ◽  
Jory L. Jonas ◽  
Paul R. McKenna ◽  
Jacques Rinchard ◽  
Ji Xiang He ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Great Lakes ◽  
Lake Michigan ◽  
Lake Trout ◽  
Stomach Contents ◽  
Neogobius Melanostomus ◽  
Lake Huron ◽  
Fatty Acid Profiles ◽  
Rainbow Smelt ◽  
Western Lake

Despite long-term efforts to restore lake trout (Salvelinus namaycush) populations in the Great Lakes, they continue to experience insufficient recruitment and rely on hatchery programs to sustain stocks. As lake trout reproductive success has been linked to diets, spatial heterogeneity in diet compositions is of interest. To assess spatial components of adult lake trout diets, we analyzed stomach contents and fatty acid profiles of dorsal muscle collected throughout Lake Michigan and along Lake Huron’s Michigan shoreline. Lake trout from Lake Huron were generally larger in both length and mass than those from Lake Michigan. However, lake trout from Lake Michigan varied more in size based on depth of capture with smaller fish being caught more in deeper set nets. Fatty acids and stomach contents indicated that alewife (Alosa pseudoharengus) were consumed more in western Lake Michigan in contrast with round goby (Neogobius melanostomus) along the eastern shoreline. Conversely, in Lake Huron, lake trout primarily consumed rainbow smelt (Osmerus mordax). These results indicate that diet compositions of lake trout populations are relatively plastic and offer new insights into within-basin heterogeneity of Great Lakes food webs.

Benthic Habitats and the Effects of Fishing

2005 ◽  
Keyword(s):  
Great Lakes ◽  
Dreissena Polymorpha ◽  
Lake Michigan ◽  
Round Goby ◽  
Sidescan Sonar ◽  
Benthic Habitat ◽  
Indigenous Species ◽  
Dreissena Bugensis ◽  
Sensing Technology ◽  
Non Indigenous Species

Colonization by dreissenid mussels, <em>Dreissena polymorpha </em>(Zebra) and <em>Dreissena bugensis </em>(Quagga), is one of the more ecologically important events to occur in the Great Lakes during the last decade. Since their introduction into the Great Lakes, dreissenids have colonized both soft and hard substrates to depths of 80 m and reached average densities of 40,000 mussels m<sup>-2</sup> in the littoral zone. Because of high densities and widespread distribution, they have modified habitats for benthos and fishes and fostered growth and proliferation of non-indigenous species, such as the round goby and a Black Sea amphipod, <em>Echinogammarus</em>. In 2001, we used multibeam sonar to characterize the benthic habitat in Lake Michigan and acoustic remote sensing technology (sidescan sonar and acoustic bottom classification) to extend and extrapolate information on dreissenid distributions from spatially limited observations. These observations were combined with discrete in situ (video and SCUBA) observations in a geographic information system (GIS). We used this system to link dreissenid distribution with substrate type, morphology and depth. These data are critical inputs to modeling the ecological implications of dreissenid filtering on algal biomass and composition in the Great Lakes over changing environmental conditions.

Impacts of the Eurasian round goby (Neogobius melanostomus) on benthic communities in the upper St. Lawrence River

2012 ◽  
Vol 69 (3) ◽  
pp. 469-486 ◽  
Author(s):  
Rebekah Kipp ◽  
Anthony Ricciardi
Keyword(s):  
Great Lakes ◽  
Benthic Communities ◽  
Round Goby ◽  
River System ◽  
Benthic Algae ◽  
Large River ◽  
Neogobius Melanostomus ◽  
Benthivorous Fish ◽  
Ecosystem Impacts ◽  
St Lawrence River

An invasive benthivorous fish, the Eurasian round goby ( Neogobius melanostomus ) is abundant throughout the lower Great Lakes – St. Lawrence River system. We examined the round goby’s potential to alter benthic communities on cobble substrates in the upper St. Lawrence River. During the summers of 2008 and 2009, macroinvertebrates and benthic algae were sampled across sites with varying goby densities. Archived data from various sites in 2004–2006 (prior to invasion) were available for comparison. Macroinvertebrate community composition varied significantly among samples grouped into categories based on goby density and time since invasion. Macroinvertebrate diversity and dominance by large-bodied taxa declined with increasing goby density. Surprisingly, dreissenid biomass did not vary consistently with goby density, in contrast to studies in the Great Lakes. The biomass of all non-dreissenid taxa was negatively correlated with increasing goby density across sites and over time at three of four sites. Negative effects were most pronounced on the biomass of gastropods. Benthic algal biomass increased with goby density across sites, suggesting a trophic cascade driven by the impacts of gobies on gastropods and other algivores. Our study highlights the potential ecosystem impacts of an expanding goby population in a large river.

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