Relating life‐history traits, environmental constraints and local extinctions in river fish

Bergerot, Benjamin; Hugueny, Bernard; Belliard, Jérôme

doi:10.1111/fwb.12561

Cited by 23 publications

(19 citation statements)

References 66 publications

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“…More recently, Mims and Olden (2012) reviewed fish assemblage data from 109 sites in the USA and found positive correlations between flow variability and opportunistic strategists, flow seasonality and periodic strategists, and flow stability and equilibrium strategists. Collectively, these and other studies support life history theory as a framework for predicting fish-flow relationships across gradients of hydrologic regimes, in part because traits are filtered on evolutionary time scales (e.g., centuries to millennia) to shape species adaptations and occurrences (Heino et al 2013;Bergerot et al 2015;Meador and Brown 2015). However, relatively few studies have addressed the extent to which changes in hydrologic regimes caused by impoundment construction and flow alteration might filter fish species occurrence on ecological time scales (e.g., decades to centuries).…”

Section: Introductionmentioning

confidence: 53%

Life history theory predicts long-term fish assemblage response to stream impoundment

Perkin

Knorp

Boersig

et al. 2017

Can. J. Fish. Aquat. Sci.

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Life history theory predictions for hydrologic filtering of fish assemblages are rarely tested with historical time series data. We retrospectively analyzed flow regime and fish assemblage data from the Sabine River, USA, to test relationships between life history strategies and hydrologic variability altered by impoundment construction. Downstream flow variability, but not magnitude, was altered by completion of Toledo Bend Reservoir (TBR) in 1966. Consistent with life history theory, occurrence of opportunistic strategists declined while equilibrium strategists increased as the fish assemblage was transformed between periods immediately after (1967–1973) and approximately one decade after (1979–1982) completion of TBR. Assemblage transformation was related to decline of opportunistic strategists throughout 250 km of river downstream of TBR. Temporal trajectories for opportunistic and intermediate strategist richness modelled as a function of flow variability converged 12 years postimpoundment. The spatiotemporal scaling of our study is novel among tests of life history theory, and results suggest impoundment-induced alteration to natural hydrologic filtering of fish assemblages can operate on the scale of hundreds of stream kilometres and manifest within approximately one decade.

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Section: Introductionmentioning

confidence: 53%

Life history theory predicts long-term fish assemblage response to stream impoundment

Perkin

Knorp

Boersig

et al. 2017

Can. J. Fish. Aquat. Sci.

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“…Brown trout density in each site (all years pooled) was >20% of the total fish density. Sites were sampled by wading during autumn to ensure a suitable catchability of the 0+ fish, using a two‐passes electrofishing method which provided reliable estimates of fish abundances (Cattanéo et al ., ; Poulet, Beaulaton, & Dembski, ; Bergerot, Hugueny, & Belliard, ). The general weighted estimator proposed by Carle and Strub () allowed us to evaluate the most likely population abundance based on a removal sampling protocol, together with its confidence interval.…”

Section: Methodsmentioning

confidence: 99%

Hydrological drivers of brown trout population dynamics in France

Bergerot

Cattanéo

2016

Ecohydrology

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International audienceAlteration of natural river flow regimes is a major threat to freshwater biodiversity. Restoration of natural flow regimes requires an understanding of linked hydrological and ecological processes. In this study, we investigated how annual seasonal flow characteristics and physical habitat attributes could interact to explain yearly changes in brown trout population densities (for 0+ fish, corresponding to the young of the year, and for the >0+ age class) in 112 sites widespread in France. Using an information theoretic approach and general linear modeling, we identified the physical habitat attributes and seasonal hydrological variables which explained 0+ proportion, total, >0+ and 0+ brown trout density dynamics. A decrease in total and 0+ brown trout densities were mainly linked to high water levels in both high and low flows during the emergence period and to a lesser extent, to physical habitat attributes reflecting the river size. 0+ proportions were only linked to the level of low flows, and to a lesser extent to high flows, during the emergence period. Our study demonstrated that seasonality of flow is a main driver of brown trout population dynamics, especially magnitude of high and low flows for the 0+ age class, and should be considered in the definition of environmental flows

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“…This species may be highly vulnerable to fish poisoning, as it inhabits in the middle of the water column and form small schools. Some of the traits of individual fish species make them more vulnerable to environmental perturbations, and these traits increase the probability of their local extinctions (Angermeier, 1995;Bergerot, Hugueny, & Belliard, 2015).…”

Section: Discussionmentioning

confidence: 99%

Impact of fishing with Tephrosia candida (Fabaceae) on diversity and abundance of fish in the streams at the boundary of Sinharaja Man and Biosphere Forest Reserve, Sri Lanka

Epa

Mohotti

2016

RBT

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Local communities in some Asian, African and American countries, use plant toxins in fish poisoning for fishing activities; however, the effects of this practice on the particular wild fish assemblages is unknown. This study was conducted with the aim to investigate the effects of fish poisoning using Tephrosia candida, on freshwater fish diversity and abundance in streams at the boundary of the World Natural Heritage site, Sinharaja Forest Reserve, Sri Lanka. A total of seven field trips were undertaken on a bimonthly basis, from May 2013 to June 2014. We surveyed five streams with similar environmental and climatological conditions at the boundary of Sinharaja forest. We selected three streams with active fish poisoning practices as treatments, and two streams with no fish poisoning as controls. Physico-chemical parameters and flow rate of water in selected streams were also measured at bimonthly intervals. Fish were sampled by electrofishing and nets in three randomly selected confined locations (6 x 2 m stretch) along every stream. Fish species were identified, their abundances were recorded, and Shannon-Weiner diversity index was calculated for each stream. Streams were clustered based on the Bray-Curtis similarity matrix for fish composition and abundance. Physico-chemical parameters of water were not significantly different among streams (P > 0.05). A total of 15 fish species belonging to four different orders Cypriniformes, Cyprinodontiformes, Perciformes and Siluriformes were collected; nine species (60 %) were endemic, and six (40 %) were native species. From these, 13 fish species were recorded in streams with no poisoning, while five species were recorded in streams where poisoning was practiced. Four endemic and one native fish species were locally extinct in streams where fish poisoning was active. Fish abundance was significantly higher in control streams (32-39/m2) when compared to treatment streams (5-9/m2) (P < 0.05). We concluded that fish poisoning with T. candida may have resulted in a significant reduction in species richness, total abundance and Shannon-Weiner diversity index of fish species in the studied streams at the boundary of Sinharaja forest. We recommend that this fishing practice should be strictly regulated, and to inform local communities about the legal status of fish poisoning, its consequences and the importance of fish diversity for local livelihoods and conservation purposes.

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Relating life‐history traits, environmental constraints and local extinctions in river fish

Cited by 23 publications

References 66 publications

Life history theory predicts long-term fish assemblage response to stream impoundment

Life history theory predicts long-term fish assemblage response to stream impoundment

Hydrological drivers of brown trout population dynamics in France

Impact of fishing with Tephrosia candida (Fabaceae) on diversity and abundance of fish in the streams at the boundary of Sinharaja Man and Biosphere Forest Reserve, Sri Lanka

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