Trophic niche overlap between native and non-native fishes

Córdova-Tapia, Fernando; Contreras, Moisés; Zambrano, Luis

doi:10.1007/s10750-014-1944-z

Cited by 49 publications

(40 citation statements)

References 47 publications

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“…This study confirmed that Astyanax species are an opportunistic group (Mise et al., ) with the ability to exploit a wide variety of trophic resources; however, some important differences were found between the two coexisting species studied here. For example, δ 15 N and δ 13 C showed wider variation in A. aeneus (Figure ), which has been suggested as a characteristic of fish with omnivorous habits in lacustrine systems (Córdova‐Tapia, Contreras, & Zambrano, ; Jepsen & Winemiller, ; Vander Zanden & Vadeboncoeur, ). In this respect, the niche area of A. caballeroi was more restricted than that of A. aeneus (TA = 2 and 2.6, respectively), which is characteristic of fish with specialized trophic habits (Jepsen & Winemiller, ).…”

Section: Discussionmentioning

confidence: 83%

Trophic specialization and morphological divergence between two sympatric species in Lake Catemaco, Mexico

Ornelas‐García

Córdova-Tapia

Zambrano

et al. 2018

Ecology and Evolution

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The association of morphological divergence with ecological segregation among closely related species could be considered as a signal of divergent selection in ecological speciation processes. Environmental signals such as diet can trigger phenotypic evolution, making polymorphic species valuable systems for studying the evolution of trophic‐related traits. The main goal of this study was to analyze the association between morphological differences in trophic‐related traits and ecological divergence in two sympatric species, Astyanax aeneus and A. caballeroi, inhabiting Lake Catemaco, Mexico. The trophic differences of a total of 70 individuals (35 A. aeneus and 35 A. caballeroi) were examined using stable isotopes and gut content analysis; a subset of the sample was used to characterize six trophic and six ecomorphological variables. In our results, we recovered significant differences between both species in the values of stable isotopes, with higher values of δ15N for A. caballeroi than for A. aeneus. Gut content results were consistent with the stable isotope data, with a higher proportion of invertebrates in A. caballeroi (a consumption of invertebrates ten times higher than that of A. aeneus, which in turn consumed three times more vegetal material than A. caballeroi). Finally, we found significant relationship between ecomorphology and stable isotopes (r = .24, p < .01), hence, head length, preorbital length, eye diameter, and δ15N were all positively correlated; these characteristics correspond to A. caballeroi. While longer gut and gill rakers, deeper bodies, and vegetal material consumption were positively correlated and corresponded to A. aeneus. Our results are consistent with the hypothesis that morphological divergence in trophic‐related traits could be associated with niche partitioning, allowing the coexistence of closely related species and reducing interspecific competition.

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Section: Discussionmentioning

confidence: 83%

Trophic specialization and morphological divergence between two sympatric species in Lake Catemaco, Mexico

Ornelas‐García

Córdova-Tapia

Zambrano

et al. 2018

Ecology and Evolution

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“…There have been similar reports for other non‐native fish species, such as a decrease in water quality associated with an increase in the abundance of non‐native species (La Porta et al, ; Rowe, ; Tarkan et al, ). For instance, Nile tilapia may cause trophic cascades by increasing nitrogen and phosphorus availability, promoting fast‐growing algae (Cόrdova‐Tapia, Contreras, & Zambrano, ; Figueredo & Giani, ). Elsewhere, Nile tilapia has been shown to alter water quality through sediment resuspension (bioturbation) and nutrient excretion (Drenner, Smith, & Threkheld, ; Starling et al, ).…”

Section: Discussionmentioning

confidence: 99%

Nile tilapia (Oreochromis niloticus) invasions disrupt the functional patterns of fish community in a large subtropical river in China

Shuai

Liu

et al. 2019

Fisheries Management Eco

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Although non‐native species can modify ecosystem function, their effects in southern China have not been investigated, despite their ecological importance. This study assessed how Nile tilapia Oreochromis niloticus (L.) invasions impact the functional patterns of fish communities in the large subtropical Pearl River by analysing the relationships between invasion and body size over a 9‐year period. The relative abundance of Nile tilapia increased significantly over time. In particular, the established Nile tilapia significantly undermined the relative densities and the body size of the native fishes. Importantly, this study provided empirical evidence that functional indices (such as body size) are more sensitive when evaluating the effects of non‐native species on a community than richness. Understanding processes such as those should be the basis of controlling alien fish species and fisheries management in the Pearl River.

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“…In a study carried out in a Mexican lake, Córdova-Tapia et al (2015) used carbon and nitrogen stable isotopes to assess the trophic niche overlaps between native and invasive fish species. The trophic niche of two invasive species (Cyprinus carpio and Oreochromis aureus) had a high overlap with the niche of native fish species, suggesting that competition for food might explain the decline of native species in this lake.…”

Section: Impactsmentioning

confidence: 99%

Aquatic invasive species: general trends in the literature and introduction to the special issue

et al. 2014

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Invasion rates are increasing worldwide and most are due to the actions of humans. Deliberate introductions, escapes, and hitchhiking with global commerce transport species to other continents. While most species fail to thrive or have minor impacts on their new ecosystems, the large number of introductions has led to numerous problems. Aquatic invasive species are particularly pervasive and may cause food web disruption, biodiversity loss, and economic harm. Biological invasions appear in an increasing number of publications in the aquatic and general ecology literature. This special issue of Hydrobiologia includes 31 papers on aquatic invasive species and the factors that influence their dispersal and success, along with their impacts. Ecosystems include freshwater ponds, lakes and reservoirs, small streams and large rivers, and coastal marine systems. Study regions occur in temperate, as well as less-studied tropical and sub-tropical regions of four different continents. We discuss the dynamics of invasive species research in the current literature and provide a brief overview of the contributions to this issue.

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Trophic niche overlap between native and non-native fishes

Cited by 49 publications

References 47 publications

Trophic specialization and morphological divergence between two sympatric species in Lake Catemaco, Mexico

Trophic specialization and morphological divergence between two sympatric species in Lake Catemaco, Mexico

Nile tilapia (Oreochromis niloticus) invasions disrupt the functional patterns of fish community in a large subtropical river in China

Aquatic invasive species: general trends in the literature and introduction to the special issue

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