Density and Distribution of Amphipods in Oneida Lake, New York, after the Introduction of the Exotic Amphipod<i>Echinogammarus ischnus</i>

Cooper, John E.; Wallquist, Elin; Holeck, Kristen T.; Hoffman, Catharine E.; Mills, Edward L.; Mayer, Christine M.

doi:10.1656/045.019.0208

Cited by 3 publications

(4 citation statements)

References 41 publications

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“…It should be pointed out though that despite extreme differences in population density (range: 36 individuals—2,400 individuals per unit effort sampling) the effect of population density on male mate choosiness was weaker than we expected. This could be explained by amphipods occurring in aggregations ( Aumack et al 2011 ; Vitaliano et al 2013 ; Beermann et al 2015 ) in some microhabitats ( Korpinen and Westerbom 2010 ; Cooper et al 2012 ) while being rather evenly distributed in others. Population density can therefore be low on average, but when animals encounter an aggregation of conspecifics, they can afford to be choosy.…”

Section: Discussionmentioning

confidence: 99%

“…Gammarus roeselii (Gervais 1835) is an excellent model organism for our research question for the following reasons: First, due to immense costs of mate guarding, male mate choice plays a crucial role in this system ( Birkhead and Clarkson 1980 ; Dunham et al 1986 ; Elwood et al 1987 ; Dick and Elwood 1989 ; Dick 1992 ; Jormalainen 1998 ; Kelly et al 2001 ; Bollache et al 2002 ). Second, amphipod populations show considerable natural interpopulation variation in population density ( Cooper et al 2012 ; Leite et al 2014 ; Jourdan et al 2019 ; Lipkowski et al 2019 ) and sex ratio (from male-biased to strongly female-biased; Helan et al 1973 ; Dick and Elwood 1996 ; Prato and Biandolino 2003 ; Jourdan et al 2019 ); third, males were shown to be able to assess the level of intrasexual-competition (i.e., sex ratio/male density) and to evaluate differences in female quality ( Ward 1983 ; Hunte et al 1985 ; Elwood et al 1987 ; Dick and Elwood 1989 , 1996 ; Dunham and Hurshman 1990 ).…”

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confidence: 99%

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Natural variation in social conditions affects male mate choosiness in the amphipodGammarus roeselii

et al. 2021

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The extent of male mate choosiness is driven by a trade-off between various environmental factors associated with the costs of mate acquisition, quality assessment and opportunity costs. Our knowledge about natural variation in male mate choosiness across different populations of the same species, however, remains limited. In the current study, we compared male mate choosiness across ten natural populations of the freshwater amphipod Gammarus roeselii (Gervais, 1835), a species with overall high male mating investments, and evaluated the relative influence of population density and sex ratio (both affecting mate availability) on male mate choosiness. We investigated amplexus establishment after separating mating pairs and presenting focal males with a novel, size-matched female from the same population. Our analysis revealed considerable effects of sex ratio and (to a lesser extent) population density on time until amplexus establishment (choosiness). Male amphipods are able to perceive variable social conditions (e.g. sex ratio) and modify their mating strategy accordingly: We found choosiness to be reduced in increasingly male-biased populations, while selectivity increases when sex ratio becomes female biased. With this, our study expands our limited knowledge on natural variations in male mate choosiness and illustrates the importance of sex ratio (i.e. level of competition) for male mating decisions in natural environments. Accounting for variation in sex ratios, therefore, allows envisioning a distinctive variation of choosiness in natural populations and highlights the importance of considering social background information in future behavioural studies.

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Section: Discussionmentioning

confidence: 99%

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confidence: 99%

Natural variation in social conditions affects male mate choosiness in the amphipodGammarus roeselii

et al. 2021

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“…A common challenge in accurately predicting nonindigenous species is the assumption that an invasive species absence is caused exclusively due to the lack of appropriate habitat (Vaclavik and Meentemeyer, ). Dreissena in the lower Niagara River, for example, may be constrained by “environmental barriers,” ie bottom flow even though 70% of the river bed is composed of consolidated material—the preferred substrate for Dreissena (Mehler et al, ), resulting in densities far below those reported from lentic environments (Cooper et al, ; Nalepa, Fanslow, and Pothoven, ). The accuracy of SDMs also depends on a species ecological characteristic (McPherson and Jetz, ).…”

Section: Discussionmentioning

confidence: 99%

“…Finally, Dreissena and E. ischnus may also be limited by variables that were not considered in this study. For example, fish and intraguild predation may limit the distribution of E. ischnus in otherwise suitable substrate (Cooper et al, ; Gonzales and Burkart, ). In contrast, it is well known that presence of Dreissena can facilitate E. ischnus by providing shelter and food (Palmer and Ricciardi, ).…”

Section: Discussionmentioning

confidence: 99%

Integrating remote sensing and species distribution modelling to predict benthic communities in a Great Lakes connecting channel

Mehler

Burlakova

Karatayev

et al. 2017

River Research & Apps

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Species distribution models have become widespread in benthic ecology; however, they have mostly been applied to marine and lentic systems. In this study, we applied a maximum entropy model by using remote sensing-derived environmental variables to predict the distribution of 4 major benthic communities dominated by Tubificidae, Naididae, Echinogammarus ischnus, andDreissena spp, respectively, in the lower Niagara River, NY, USA. The model showed very good accuracy for benthic communities with a narrow distribution range (Tubificidae and Naididae) indicated by the area under the curve test values of 0.906 and 0.987, respectively. In contrast, the model showed poor performance for E. ischnus and Dreissena indicated by the low area under the curve values of 0.615 and 0.618, respectively. Both communities are known to cope with a wide variety of environmental factors and habitats, making their accurate predictions difficult using presence-only data. Our results can further be used to locate important feeding grounds for higher trophic levels, to assess the potential spread of exotic species, and to identify areas for restoration.

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The Bass Parasites of Oneida Lake, 80 Years Later

Bauer¹,

Whipps²

2015

Journal of Parasitology

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A survey of largemouth (Micropterus salmoides) and smallmouth bass (Micropterus dolomieu) parasite communities in Oneida Lake, New York, was conducted in the summer of 2012 and compared to an earlier survey conducted by Van Cleave and Mueller during the summers of 1929 to 1931. The component helminth communities between surveys were 31% similar in composition for largemouth and 28% similar for smallmouth bass. Between species, the component helminth communities were considerably more similar in the present survey (71%) than in the survey conducted by Van Cleave and Mueller (47%). Seven species reported by Van Cleave and Mueller were present in this survey and 21 species are new records for the bass of Oneida Lake. Van Cleave and Mueller did not report prevalence values for several taxa (Monogenea, Copepoda, Myxozoa, and a Trichodina sp.) that were important for separation of parasite infracommunities in species space for both bass species. These parasites represented 28% of all species found in the current survey and may be ecologically important. Several species of parasites exhibited differences in prevalence between surveys. Two species (Rhipidocotyle papillosa and Crepidostomum cornutum) were absent from this survey but were reported as common in the 1929-1931 survey and almost certainly represent extirpations that coincide with the loss of their native bivalve hosts from Oneida Lake. Other differences in the parasite communities may also be explained by the ecological disturbances in Oneida Lake over the past 81 yr. The changes in bass parasite communities between surveys emphasize the importance of recognizing the historical nature of parasite communities, especially in ecosystems with a history of large-scale changes. Most importantly our findings suggest that, similar to trends observed in free-living freshwater biotic communities, anthropogenic ecosystem disturbances may homogenize fish parasite communities.

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Density and Distribution of Amphipods in Oneida Lake, New York, after the Introduction of the Exotic AmphipodEchinogammarus ischnus

Cited by 3 publications

References 41 publications

Natural variation in social conditions affects male mate choosiness in the amphipodGammarus roeselii

Natural variation in social conditions affects male mate choosiness in the amphipodGammarus roeselii

Integrating remote sensing and species distribution modelling to predict benthic communities in a Great Lakes connecting channel

The Bass Parasites of Oneida Lake, 80 Years Later

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