Mechanisms structuring stream fish assemblages: Are there lessons from introduced species?

Ross, Stephen T.

doi:10.1007/bf02027979

Cited by 179 publications

(122 citation statements)

References 47 publications

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“…Reservoirs provide the stable lentic habitats in which introduced species, many of them predatory, can develop thriving populations. It is also commonly assumed that introduced species can more easily establish in altered ecosystems (Herbold and Moyle, 1986;Ross, 1991;Ross et al, 2001) such as those created by reservoirs.…”

Section: Introduced Species Dams and Conservation Statusmentioning

confidence: 99%

Fish fauna in Iberian Mediterranean river basins: biodiversity, introduced species and damming impacts

Clavero

Blanco

Prenda

2004

Aquatic Conservation

143

137

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1.We used a basin approximation to analyse distribution patterns of different components of biodiversity (taxonomic richness, endemicity, taxonomic singularity, rarity) and conservation status of freshwater fish fauna in 27 Mediterranean Iberian rivers. 2.Basin area alone explained more than 80% of variation in native species richness. Larger basins featured not only a higher number of native species, but also more endemic and rare species and less diversified genera than smaller ones. 3.In contrast, smaller basins scored higher community conservation values, due to their lower degree of invasion by introduced species. 4.The presence of dams was the most important factor determining the conservation status of fish communities, and it was also positively associated with the number of introduced species. 5.While the most important components of Iberian freshwater fish biodiversity are located in large basins, small unregulated ones feature better conserved fish communities.2

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Section: Introduced Species Dams and Conservation Statusmentioning

confidence: 99%

Fish fauna in Iberian Mediterranean river basins: biodiversity, introduced species and damming impacts

Clavero

Blanco

Prenda

2004

Aquatic Conservation

143

137

View full text Add to dashboard Cite

show abstract

“…With the proper study designs, FQIs, like IBIs or multimetric indices, can also be used by agencies for making regional or national fishery assessments as well as assemblage (Stoddard et al 2005;Paulsen et al 2008) and ecosystem service (Costanza et al 1997;Limburg et al 2002) assessments. Third, single-species management has been increasingly shown to be problematic where there are strong interactions (predator-prey, competition, nonnative invasives) among fish species (Ross 1991;Moyle and Light 1996;Hughes et al 2005). Fourth, despite having low IBI scores, sites with high SQI or FQI scores may warrant increased water body protection or management to protect the fishery.…”

mentioning

confidence: 99%

A Preliminary Fishery Quality Index for Portuguese Streams

Oliveira¹,

Ferreira²,

Morgado³

et al. 2009

N American J Fish Manag

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Abstract.-There is a need to quantify the multivariate quality of a recreational fishery at the site scale to better communicate the relative quality among sites to the public and anglers. Borrowing on the general approach of multimetric indices of biotic integrity (IBIs), we developed fishery quality indices (FQIs) from species quality indices (SQIs) based on measures of fish abundance and size structure for northern and central Portuguese streams. Our FQIs showed regional patterns indicating a range in fishery quality. Higher coldwater FQI scores were mostly found in the northwestern (Minho and Lima), northeastern Douro, and northern Tagus basins. Higher warmwater FQI scores occurred in the eastern Tagus basin. The species that contributed the most to warmwater FQI scores were largemouth bass Micropterus salmoides, pumpkinseed Lepomis gibbosus, the cyprinid Luciobarbus bocagei, chubs Squalius carolitertii and S. pyrenaicus, and nases Pseudochondrostoma duriense and P. polylepis. The chubs, nases, and brown trout Salmo trutta contributed the most to coldwater FQI scores. As expected, our indices were correlated with river size and with disturbance at the catchment, segment, and site scales. Regression models for separate coldwater and warmwater FQIs were stronger than those for the individual SQIs and for an all-site FQI. The correlation was positive between the coldwater FQI and a coldwater IBI but negative between the warmwater FQI and warmwater IBIs. The proposed FQIs offer a quantitative approach for assessing relative fishery quality among sites and for making regional assessments given an appropriate study design. The component SQIs and SQI metrics of the FQIs can be disassociated to determine the population and species characteristics most affected by various environmental variables.

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“…One important mechanism behind these impacts is predation (Ross 1991;Mack et al 2000;Davis 2003;Sax and Gaines 2008;Kumschick et al 2012;Blackburn et al 2014). Predation is a fundamental ecological interaction with the capacity to shape and structure natural communities (Thorp 1986;Case and Bolger 1991;Wellborn et al 1996;Jackson et al 2001).…”

Section: Introductionmentioning

confidence: 99%

Size matters: predation of fish eggs and larvae by native and invasive amphipods

Taylor

Dunn

2016

Biol Invasions

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Invasive predators can have dramatic impacts on invaded communities. Extreme declines in macroinvertebrate populations often follow killer shrimp (Dikerogammarus villosus) invasions. There are concerns over similar impacts on fish through predation of eggs and larvae, but these remain poorly quantified. We compare the predatory impact of invasive and native amphipods (D. villosus and Gammarus pulex) on fish eggs and larvae (ghost carp Cyprinus carpio and brown trout Salmo trutta) in the laboratory. We use size-matched amphipods, as well as larger D. villosus reflecting natural sizes. We quantify functional responses, and electivity amongst eggs or larvae and alternative food items (invertebrate, plant and decaying leaf). D. villosus, especially large individuals, were more likely than G. pulex to kill trout larvae. However, the magnitude of predation was low (seldom more than one larva killed over 48 h). Trout eggs were very rarely killed. In contrast, carp eggs and larvae were readily killed and consumed by all amphipod groups. Large D. villosus had maximum feeding rates 1.6-2.0 times higher than the smaller amphipods, whose functional responses did not differ.In electivity experiments with carp eggs, large D. villosus consumed the most eggs and the most food in total. However, in experiments with larvae, consumption did not differ between amphipod groups. Overall, our data suggest D. villosus will have a greater predatory impact on fish populations than G. pulex, primarily due to its larger size. Higher invader abundance could amplify this difference. The additional predatory pressure could reduce recruitment into fish populations.

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Mechanisms structuring stream fish assemblages: Are there lessons from introduced species?

Cited by 179 publications

References 47 publications

Fish fauna in Iberian Mediterranean river basins: biodiversity, introduced species and damming impacts

Fish fauna in Iberian Mediterranean river basins: biodiversity, introduced species and damming impacts

A Preliminary Fishery Quality Index for Portuguese Streams

Size matters: predation of fish eggs and larvae by native and invasive amphipods

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