Trophic Relationships of Limnoperna Fortunei with Adult Fishes

Cataldo, Daniel

doi:10.1007/978-3-319-13494-9_13

Cited by 27 publications

(19 citation statements)

References 27 publications

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“…As hypothesized in this study, and previously discussed by others (e.g. Cataldo, ; Sylvester, Boltovskoy, & Cataldo, ), our investigation supports that fish species that are better adapted to the consumption of hard prey represent an important top‐down control of mussel populations. In line with this, our exclusion experiment shows a marked difference in mussel density between open and closed modules, supporting the role of fish as mitigators of this invasion.…”

Section: Discussionsupporting

confidence: 92%

“…More than one‐third of the native fish species in the assemblage of the lower Uruguay River predated on L. fortunei. Most of these species had been previously reported as L. fortunei consumers in different areas of the Río de La Plata Basin, such as the Paraná River channel and reservoirs, and the inner Río de La Plata Estuary (Boltovskoy et al, ; Cataldo, ; Catanhêde, Hahn, Gubiani, & Fugi, ; Penchaszadeh et al, ). These studies were conducted in different watersheds, and thus bear different fish assemblages.…”

Section: Discussionmentioning

confidence: 95%

“…The complete removal of this invasive mussel species currently seems unlikely due to the widespread nature of the invasion, which is in continuous dispersal, and the fact that the mussel can maintain elevated populations in areas that act as refuges from predation (i.e. beneath hard substrates, among dense plants mats, among others; Cataldo, ). However, it is important to highlight that our results support that predatory fish of L. fortunei in the lower Uruguay River play a relevant predation role on mussel populations and, therefore, that predators could mitigate some of the consequences of the golden mussel invasion for the riverine ecosystem.…”

Section: Discussionmentioning

confidence: 99%

“…Several fish species in the inner Río de La Plata Estuary and Paraná River were reported as consumers of L. fortunei (Cataldo, ; García & Protogino, ; González‐Bergonzoni, Teixeira de Mello, Vidal, D'Anatro, & Masdeu, ; Penchaszadeh et al, ). This leads to the speculation that fish may regulate mussel populations to a certain extent (Cataldo, ). However, the predator–prey interactions involving L. fortunei have not been studied using standardized methods that allow an accurate assessment of the particular role of different native fish species in the predation over the invasive species.…”

Section: Introductionmentioning

confidence: 99%

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Evaluating the role of predatory fish controlling the invasion of the Asian golden mussel Limnoperna fortunei in a subtropical river

González‐Bergonzoni

Silva

Mello

et al. 2020

Journal of Applied Ecology

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The invasive Asian golden mussel Limnoperna fortunei is continuously expanding through South America, altering aquatic ecosystem structure and functioning. While several native fish species predate on this mussel, these interactions, and their consequences for the food web, have not been studied in depth. We combine a survey of the fish assemblage trophic structure using gut contents and stable isotope analysis with an in situ exclusion experiment in order to: (a) determine the main fish species predating on L. fortunei; (b) estimate the contribution of L. fortunei to the biomass of fish assemblage; and (c) evaluate the role of fish on the density and maximum shell length of L. fortunei in the lower Uruguay River (the Río de La Plata Basin). We found that about one third of fish species in the assemblage (28 out of 81 species) consumed L. fortunei, which was an important food item (>10% of the dietary volume and >30% of frequency of occurrence) for 11 fish species. Stable isotope mixing models consistently suggested that >14% of the total biomass of the fish assemblage was derived directly from carbon derived from L. fortunei tissues. In addition, the exclusion experiment demonstrated that fish predation reduces the mussel density by c. 70% and the mussel maximum shell length by c. 40%. Synthesis and applications. Our research suggests a top‐down effect of fish on the invasive Asian golden mussel's abundance. This work highlights the need to preserve the native fish communities, particularly in South America, where many vulnerable migratory fish are of key relevance as Limnoperna fortunei consumers. In the light of these findings, actions such as implementing efficient fish passage technologies in the actual (and projected) dams of the Uruguay River basin and elsewhere become essential to avoid local extinctions of these natural invasion controls upstream of the dams.

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Section: Discussionsupporting

confidence: 92%

Section: Discussionmentioning

confidence: 95%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Evaluating the role of predatory fish controlling the invasion of the Asian golden mussel Limnoperna fortunei in a subtropical river

González‐Bergonzoni

Silva

Mello

et al. 2020

Journal of Applied Ecology

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“…Enhancement of toxic cyanobacterial blooms in South America by the freshwater invasive bivalve Limnoperna fortunei (Cataldo et al, ) is clearly a negative impact which, among many others, is often responsible for massive fish mortalities. However, since its introduction around 1990, the planktonic larvae of this invasive mussel are widely consumed by indigenous fish larvae, for which they represent an abundant, easily available and more nutritious prey than native zooplankton (Paolucci, Thuesen, Cataldo, & Boltovskoy, ), and adult mussels are grazed upon by at least 50 South American fish species (Cataldo, ), which eliminate up to over 90% of the mussel's yearly production (Duchini, Boltovskoy, & Sylvester, ; Sylvester, Boltovskoy, & Cataldo, ). The increase in Argentine freshwater fish landings from ~10,000 metric tons in 1950–1990, to ~20,000 tons after 1995, has been tentatively attributed to the presence of this new trophic resource (Boltovskoy, Correa, Cataldo, & Sylvester, ).…”

Section: Dissent Debate and Denialismmentioning

confidence: 99%

Invasive species denialism: Sorting out facts, beliefs, and definitions

Boltovskoy

Sylvester

Paolucci

2018

Ecology and Evolution

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In the last decades, thousands of investigations confirmed the detrimental effects of species translocated by man outside of their native ranges (nonindigenous species, or NIS). However, results concluding that many NIS have null, neutral, or positive impacts on the biota and on human interests are as common in the scientific literature as those that point at baneful impacts. Recently, several scholars confronted the stand that origin per se is not a reliable indicator of negative effects, suggesting that such conclusions are the expression of scientific denialism, often led by spurious purposes, and that their numbers are increasing. When assessed in the context of the growing interest in introduced species, the proportion of academic publications claiming that NIS pose no threats to the environment and to social and economic interests is extremely low, and has not increased since 1990. The widely prevailing notion that many NIS are effectively or potentially harmful does not conflict with the fact that most have mixed (negative, neutral, and positive) impacts. When based on solid grounds, reports of positive or neutral impacts should not be labeled as manipulative or misleading unless proven otherwise, even if they may hamper interest in‐ and funding of research and control bioinvasion programs.

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Impact of a hydroelectric power plant on migratory fishes in the Uruguay River

Cataldo

Gattás

Leites³

et al. 2020

River Research & Apps

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Dams alter river functioning and hinders the free movement of migratory fishes. We analysed the effects of a subtropical dam on the reproduction of migratory fishes using data from ichthyoplankton monitoring surveys. These were conducted at six sampling stations upstream, downstream and within the reservoir on a weekly basis during 6 years. The dam had a direct impact on fish movement, leading to the fragmentation of fish populations. Two different and independent reproductive areas became evident: one located in the reservoir headwater area and the other downstream of the dam. The long temporal scale of our study facilitated the detection of the impact of Salto Grande on the species of ichthyoplankton. Freshwater secondary fish species (mainly Lycengraulis grossidens) increased in abundance in the stations located inside the reservoir and closer to the dam, whereas most fishes found in the headwater of the reservoir corresponded to river migratory species (potamodromous fish). These differences are most likely due to changes in the physicochemical characteristics of the water induced by the transformation of a river into a reservoir. During rainy summers, Microcystis spp. densities were lower than 1,000 cells ml −1 and fish densities were higher than 4 ind. m −3 , whereas in dry summers, there were important Microcystis spp. blooms (401,573 ± 112,559 cells ml −1) and fish larvae decreased sharply (<1 ind. m −3) in the reservoir headwater area. This could indicate that the discharge of water in the reservoir may also indirectly affect the regulation of fish reproduction. The alternating periods between dry and rainy summers associated with El Niño-Southern Oscillation poses a challenge to ichthyofauna management in the reservoir.

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Trophic Relationships of Limnoperna Fortunei with Adult Fishes

Cited by 27 publications

References 27 publications

Evaluating the role of predatory fish controlling the invasion of the Asian golden mussel Limnoperna fortunei in a subtropical river

Evaluating the role of predatory fish controlling the invasion of the Asian golden mussel Limnoperna fortunei in a subtropical river

Invasive species denialism: Sorting out facts, beliefs, and definitions

Impact of a hydroelectric power plant on migratory fishes in the Uruguay River

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