A century later: Adaptive plasticity and rapid evolution contribute to geographic variation in invasive mosquitofish

Santi, Francesco; Riesch, Rüdiger; Baier, Jasmin; Grote, Michaela; Hornung, Simon; Jüngling, Hannah; Plath, Martin; Jourdan, Jonas

doi:10.1016/j.scitotenv.2020.137908

Cited by 30 publications

(29 citation statements)

References 102 publications

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“…None of the environmental or climatic variables we collected for each habitat help explain these differences, because there were no consistent differences in those variables that would set these habitats apart from the other habitats. In comparison to our results for Cladocera, there are also no obvious associations with life histories and patterns of multiple paternity (Gao et al, 2019;Santi et al, 2020). At present, we therefore do not have a convincing explanation for these results.…”

Section: Influence Of Sl and Population On Feeding Patternscontrasting

confidence: 99%

“…Regarding the pattern uncovered for Cladocera, we were able to show in previous work that fish from these Italian populations also differed strongly from those in the two Spanish populations in body condition and reproductive traits. Specifically, mosquitofish from these Italian populations exhibited higher levels of multiple paternity (Gao et al 2019), and fish of both sexes were characterized by higher body fat content (Santi et al, 2020) compared to the two Spanish populations. However, while males from these Italian populations had greater gonadosomatic index compared to males from the two Spanish sites (also a proxy for the level of sperm competition), it was females from the two Spanish sites that exhibited a greater fecundity and invested more into reproduction (i.e., greater reproductive allocation; Santi et al, 2020).…”

Section: Influence Of Sl and Population On Feeding Patternsmentioning

confidence: 90%

“…Specifically, mosquitofish from these Italian populations exhibited higher levels of multiple paternity (Gao et al 2019), and fish of both sexes were characterized by higher body fat content (Santi et al, 2020) compared to the two Spanish populations. However, while males from these Italian populations had greater gonadosomatic index compared to males from the two Spanish sites (also a proxy for the level of sperm competition), it was females from the two Spanish sites that exhibited a greater fecundity and invested more into reproduction (i.e., greater reproductive allocation; Santi et al, 2020). At present, we lack the data to properly address which specific selective factor(s) is/are driving these differences in (life histories and) size-specific feeding ecology, but future research should investigate this further.…”

Section: Influence Of Sl and Population On Feeding Patternsmentioning

confidence: 90%

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Comparative gut content analysis of invasive mosquitofish from Italy and Spain

Pirroni

Dezen

Santi

et al. 2021

Ecology and Evolution

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Section: Influence Of Sl and Population On Feeding Patternscontrasting

confidence: 99%

Section: Influence Of Sl and Population On Feeding Patternsmentioning

confidence: 90%

Section: Influence Of Sl and Population On Feeding Patternsmentioning

confidence: 90%

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Comparative gut content analysis of invasive mosquitofish from Italy and Spain

Pirroni

Dezen

Santi

et al. 2021

Ecology and Evolution

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“…Both can be invasive and readily disperse (Cote et al., 2010), which makes these species ideal for studying the factors that influence dispersal rates. Gambusia are also model species (Pyke, 2008) that are widely used for behavioural (Herbert‐Read et al., 2011), evolutionary (Santi et al., 2020), and ecophysiological (Moffett et al., 2018) research.…”

Section: Introductionmentioning

confidence: 99%

Water flow and temperature interact to determine oxidative status, swimming performance, and dispersal of mosquitofish (Gambusia holbrooki)

Seebacher

Kazerouni-Ghanizadeh

2021

Freshwater Biology

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The health of running freshwater systems depends to a large extent on flow rates, which can co‐vary with other environmental variables such as temperature. Water flow and temperature can influence oxidative status of individual animals, thereby impacting muscle function and locomotion. Consequently, ecologically important behaviours such as dispersal may be disrupted. Our aim was to determine whether the interactions between acclimation to flowing water (3 weeks at 0.06 m/s or still water), thermal acclimation (3 weeks at 18 and 28°C), and acute test temperatures (18–32°C) determine oxidative status, locomotor performance, and dispersal in mosquitofish (Gambusia holbrooki). We show that swimming capacity was greater in fish living in flowing water compared to those in still water, and that this difference was greater in warm acclimated fish. However, dispersal was not dependent on maximal locomotor capacities. Fish initiated dispersal to a greater extent when acclimated to flowing water and cool temperature, although there were interactions with acute test temperature. Dispersal speed was not affected by flow acclimation, but it was greater at cool test temperatures in cool acclimated fish, and vice versa for warm acclimated fish. Also, fish acclimated to flowing and cool water made a greater number of dispersal decisions. Oxidative damage to membranes and proteins did not change with flow or temperature treatments, but antioxidant capacities were greater in animals acclimated to flow and cool temperatures. Trait‐specific approaches used to assess fish responses to altered flow regimes typically consider a range of morphological and life‐history traits to characterise species and predict the impact of environmental change. Physiological traits and responses such as those we describe here can be a useful addition to life‐history traits in predicting the impact of environmental change on movement. Consideration of the impacts of physiological traits on dispersal can increase the efficacy of management and restoration projects.

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“…For example, the range (i.e., niche breadth) and components (i.e., within/among individuals, sexes, or size classes) of trait variation within species might influence the strength of interspecific interactions substantially (Bolnick et al, 2003(Bolnick et al, , 2011. In addition, the spatial or temporal variability of the traits might be informative of the adaptive capacity and dynamics of the species (e.g., Jourdan et al, 2019;Santi et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Intraspecific variability in the filter mesh size of suspension feeding organisms: the case of invasive Ponto-Caspian corophiids (Crustacea: Amphipoda)

Borza¹

2021

PeerJ

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Suspension feeders play pivotal roles in the nutrient cycling of almost all aquatic ecosystems. Since sufficiently large differences in the filter mesh size (FMS) can lead to different food web positions, the inter- and intraspecific variability of this trait might be of community-level importance. The aim of this study was to quantify the range of FMS variation within the three invasive Ponto-Caspian Chelicorophium species based on a large material representing various conditions (1,224 specimens from 40 samples across Central Europe), characterize the components of variation within populations, identify the main factors determining intraspecific differences, and reveal how intraspecific variation affects the FMS overlaps among species. The FMS of the most widespread invader, C. curvispinum, varied within the broadest range (between 2.34–8.28 μm, compared to 2.51–5.97 μm in C. robustum and 1.08–3.23 μm in C. sowinskyi); nevertheless, the contribution of intraspecific plasticity to the invasion success of the species is not evident based on the present study. The within-individual variability of FMS increased with the individual mean of the trait and decreased with body size; however, it showed little differences among samples. The among-individual variation within samples could be partitioned into components related to body size (ontogenetic niche shift/differences among cohorts) and sex (ecological sexual dimorphism) as well as a seemingly random component (individual specialization), varying widely in extent and relative contributions. The FMS of C. curvispinum was significantly larger in the presence of C. sowinskyi than in allopatry, likely reflecting character displacement; however, it did not show further increase when C. robustum was also present. Similar differences could not be observed in C. sowinskyi. The FMS ranges of C. curvispinum and C. robustum never overlapped with that of C. sowinskyi in co-occurrence despite the considerable intraspecific differences among sites, suggesting that their interaction can be seen as a clear case of niche differentiation by food particle size. On the contrary, the strong overlaps observed between C. curvispinum and C. robustum indicate that other factors might play the primary role in their coexistence. The studied species appear to be suitable model organisms for identifying the drivers and mechanisms of FMS variability.

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A century later: Adaptive plasticity and rapid evolution contribute to geographic variation in invasive mosquitofish

Cited by 30 publications

References 102 publications

Comparative gut content analysis of invasive mosquitofish from Italy and Spain

Comparative gut content analysis of invasive mosquitofish from Italy and Spain

Water flow and temperature interact to determine oxidative status, swimming performance, and dispersal of mosquitofish (Gambusia holbrooki)

Intraspecific variability in the filter mesh size of suspension feeding organisms: the case of invasive Ponto-Caspian corophiids (Crustacea: Amphipoda)

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