Water turbidity increases biotic resistance of native Neotropical piscivores to alien fish

Santos, Luciano Neves dos; García‐Berthou, Emili; Hayashi, Carmino

doi:10.1007/s10750-018-3548-5

Cited by 11 publications

(10 citation statements)

References 59 publications

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“…Therefore, the role of habitat composition is certainly more complex and difficult to predict, as there are diverse aquatic habitats in addition to macrophytes (e.g. logs, rocks, shrubs and bare margins), which act both individually or collectively and may interfere with ecological interactions of fish assemblages in reservoirs (Santos et al, 2011; Santos et al, 2018).…”

Section: Discussionmentioning

confidence: 99%

“…As the sites were located within the same lacustrine zone as the angling sampling, it was assumed that the sampled fish assemblages interact with the same predators. Because peacock basses thrive in still, transparent waters (Franco et al, 2018; Santos et al, 2018), lacustrine zones located near the dam were selected as sampling units (as in Franco et al, 2018) to avoid potentially confounding effects of different reservoir zones (e.g. transitional and riverine zones).…”

Section: Methodsmentioning

confidence: 99%

“…Fish gillnet catch per unit effort, richness (species number) and species diversity (Shannon's diversity and Pielou's evenness indices, using base 2 logarithms) were used as the descriptors of the composition and structure of fish assemblages in the lacustrine zones of the 15 reservoirs. In addition, fish species richness and abundance were calculated separately for three size classes (<120, 120–180 and >180 mm TL) to assess size‐dependency of the impact of peacock basses, as small fish (<150 mm TL) are predicted to be more vulnerable to this non‐native piscivore (Zaret & Paine, 1973; dos Santos, Gonzales & Araújo, 2001; Santos et al, 2018).…”

Section: Methodsmentioning

confidence: 99%

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Invasive peacock basses (Cichla spp.) and decreased abundance of small native fish in Brazilian reservoirs

Franco

Petry

García‐Berthou

et al. 2022

Aquatic Conservation

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1. Peacock basses (Cichla spp.) have been introduced in impoundments for decades, and their negative impacts on the native fish fauna have been documented.However, previous studies largely focused on the overall responses of fish assemblages, often neglecting specific predator-prey interactions and the underlying effects of environmental characteristics.2. Here, the effects of peacock bass introduction on the size structure (<120, 120-180 and >180 mm in total length) of fish assemblages in reservoirs of the Paraíba do Sul river basin were assessed. The abundance and time since the introduction of peacock basses were used as predictors, together with reservoir features, limnological variables and habitat composition as potential influencing factors.3. Descriptors of the overall community (richness, abundance and species composition) were only marginally associated with the occurrence of peacock basses. However, small and (to a lesser extent) medium-sized fish were adversely affected by the abundance and introduction time of peacock basses. Two pelagic native characidsnamely Astyanax cf. bimaculatus and Oligosarcus hepsetuswere the most affected.4. Redundancy analysis showed that reservoir age and macrophyte cover were the best predictors of fish assemblage composition. Older reservoirs and reservoirs with a higher cover of macrophytes showed a greater abundance of catfish and characids, respectively. 5. Peacock basses appear to affect fish assemblages through predation on small fish.Therefore, analyses of assemblages by size are recommended, as the use of overall assemblage descriptors may not be sufficient to capture the adverse effects of peacock basses. Moreover, these findings underscore the importance of conserving and restoring habitats in littoral zones, which function as refuges for native fish species in reservoirs. Further educational and management measures are warranted to prevent the spread of peacock basses to other reservoirs in Brazil.

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Section: Discussionmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

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Invasive peacock basses (Cichla spp.) and decreased abundance of small native fish in Brazilian reservoirs

Franco

Petry

García‐Berthou

et al. 2022

Aquatic Conservation

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“…The ''invasion paradox'' refers to the positive correlation between native and invasive species richness at coarse spatial scales, and the opposite trend at fine spatial scales (Stohlgren et al, 2006;Fridley et al, 2007). This paradox was investigated by dos Santos et al (2018) with 146 fish communities sampled over 13 years in the Upper Paraná River in Brazil. They showed that non-native fish richness was positively correlated with native richness, and this trend was independent of the spatial scale analyzed.…”

Section: Factors Influencing Colonization and Persistencementioning

confidence: 99%

“…Rodrigues et al (2018) used a 26-year dataset to compare one native and one invasive species of piranha in the Upper Paraná River (Brazil) and showed that, despite decreased abundances of the native species, its persistence in the long term is possible because of differences in resource use. Experiments with the invasive peacock bass, tilapia, and channel catfish by Santos et al (2018) showed that predation from native predators on juveniles of these alien species increased with lower water clarity. The paper suggests that construction of reservoirs and subsequent increase in water clarity may decrease biotic resistance of native predators and serve to enhance invasion success of alien fish.…”

Section: Factors Influencing Colonization and Persistencementioning

confidence: 99%

Preface

et al. 2018

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Biotic resistance to fish invasions in southern China: Evidence from biomass, habitat, and fertility limitation

Jia

Wei

et al. 2023

Ecological Applications

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Understanding the mechanisms underlying the invasion success or failure of alien species can help to predict future invasions and cope with the invaders. The biotic resistance hypothesis posits that diverse communities are more resistant to invasion. While many studies have examined this hypothesis, the majority of them have focused on the relationship between alien and native species richness in plant communities, and results have often been inconsistent. In southern China, many rivers have been invaded by alien fish species, providing an opportunity to test the resistance of native fish communities to alien fish invasions. Using survey data for 60,155 freshwater fish collected from five main rivers of southern China for 3 years, we assessed the relationships between native fish richness and the richness and biomass of alien fishes at river and reach spatial scales, respectively. Based on two manipulative experiments, we further examined the impact of native fish richness on habitat selection and the reproductive ability of an exotic model species Coptodon zillii. We found no apparent relationship between alien and native fish richness, whereas the biomass of alien fish significantly decreased with increasing native fish richness. In experiments, C. zillii preferred to invade those habitats that had low native fish richness, given evenly distributed food resources; reproduction of C. zillii was strongly depressed by a native carnivorous fish Channa maculata. Together, our results indicate that native fish diversity can continue to provide biotic resistance to alien fish species in terms of limiting their growth, habitat selection, and reproduction when these aliens have successfully invaded southern China. We thus advocate for fish biodiversity conservation, especially for key species, to mitigate against the population development and ecological impact of alien fish species.

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Water turbidity increases biotic resistance of native Neotropical piscivores to alien fish

Cited by 11 publications

References 59 publications

Invasive peacock basses (Cichla spp.) and decreased abundance of small native fish in Brazilian reservoirs

Invasive peacock basses (Cichla spp.) and decreased abundance of small native fish in Brazilian reservoirs

Preface

Biotic resistance to fish invasions in southern China: Evidence from biomass, habitat, and fertility limitation

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