Restructuring of littoral fish assemblages after drought differs in two lakes at the terminus of a heavily regulated river

2018 ◽  
Vol 34 (4) ◽  
pp. 338-347 ◽  
Author(s):  
B.T. Halliday ◽  
S.D. Wedderburn ◽  
J.L. Barton ◽  
R.E. Lester
Keyword(s):  
Fish Assemblages ◽  
Regulated River ◽  
Littoral Fish

Spatial and seasonal variation in littoral fish assemblages of four estuarine lagoons on the Mexican Pacific coast

2021 ◽  
pp. 102000
Author(s):  
Yureidy Cabrera-Páez ◽  
Consuelo M. Aguilar-Betancourt ◽  
Gaspar González-Sansón ◽  
Angel Hinojosa-Larios
Keyword(s):  
Seasonal Variation ◽  
Pacific Coast ◽  
Fish Assemblages ◽  
Mexican Pacific ◽  
Littoral Fish ◽  
Spatial And Seasonal Variation

scholarly journals Effects of Shoreline Urbanization on Littoral Fish Assemblages

2001 ◽  
Vol 17 (2) ◽  
pp. 127-138 ◽  
Author(s):  
Perry F. Trial ◽  
Frances P. Gelwick ◽  
Mark A. Webb
Keyword(s):  
Fish Assemblages ◽  
Littoral Fish

Performance of a pool-and-weir fish pass for small bottom-dwelling freshwater fish species in a regulated lowland river

2007 ◽  
Vol 57 (4) ◽  
pp. 423-432 ◽  
Author(s):  
Evelien Maerten ◽  
Marcel Eens ◽  
Guy Knaepkens
Keyword(s):  
Freshwater Fish ◽  
Fish Species ◽  
Fish Assemblages ◽  
Regulated River ◽  
Lowland River ◽  
Stone Loach ◽  
Spined Loach ◽  
Freshwater Fish Species ◽  
Cottus Gobio ◽  
Fish Pass

AbstractAlthough small benthic freshwater fish species are an important biological component of fish assemblages and free instream movement is indispensable for their survival, they are often neglected in fish pass performance studies. In this study, a capture-mark-recapture approach was used to assess whether small bottom-dwelling species, including gudgeon (Gobio gobio), stone loach (Barbatula barbatula), spined loach (Cobitis taenia) and bullhead (Cottus gobio), were able to cross a pool-and-weir fish pass in a regulated lowland river. Some tagged individuals of stone loach (18%), gudgeon (7%) and spined loach (2%) managed to successfully ascend the fish pass under study, despite the fact that water velocity levels in the different overflows of the facility (between 0.55-1.22 m/s) exceeded the critical swimming speed of all three species. Although this suggests that a pool-and-weir fish pass is a able to facilitate upstream movement of some small benthic species in a regulated river, more detailed research incorporating advanced tagging and retrieving techniques is necessary.

Diel patterns in spatial distribution of fish assemblages in lentic and lotic habitat in a regulated river

2020 ◽  
Vol 36 (7) ◽  
pp. 1014-1023
Author(s):  
Bernhard Wegscheider ◽  
Tommi Linnansaari ◽  
Craig C. Wall ◽  
Mark D. Gautreau ◽  
Wendy A. Monk ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Fish Assemblages ◽  
Regulated River ◽  
Diel Patterns ◽  
Lotic Habitat ◽  
Distribution Of Fish

scholarly journals Isolating causal pathways between flow and fish in the regulated river hierarchy

2015 ◽  
Vol 72 (11) ◽  
pp. 1731-1748 ◽  
Author(s):  
Ryan A. McManamay ◽  
Brandon K. Peoples ◽  
Donald J. Orth ◽  
Charles A. Dolloff ◽  
David C. Matthews
Keyword(s):  
Structural Equation ◽  
Large Scale ◽  
Fish Assemblages ◽  
Causal Structure ◽  
River Regulation ◽  
Regulated River ◽  
Equation Modeling ◽  
Regulated Rivers ◽  
Causal Pathways ◽  
The Hierarchical Structure

Unregulated river systems are organized in a hierarchy in which large-scale factors (i.e., landscape and segment scales) influence local habitats (i.e., reach, meso-, and microhabitat scales), and both differentially exert selective pressures on biota. Dams, however, create discontinua in these processes and change the hierarchical structure. We examined the relative roles of hydrology and other instream factors, within a hierarchical landscape context, in organizing fish communities in regulated and unregulated tributaries to the Upper Tennessee River, USA. We used multivariate regression trees to identify factors that partition fish assemblages based on trait similarities, irrespective of spatial scale. We then used classical path analysis and structural equation modeling to evaluate the most plausible hierarchical causal structure of specific trait-based community components, given the data. Both statistical approaches suggested that river regulation affects stream fishes through a variety of reach-scale variables, not always through hydrology itself. Although we observed different changes in flow, temperature, and biotic responses according to regulation types, the most predominant path in which dam regulation affected biota was via temperature alterations. Diversion dams had the strongest effects on fish assemblages. Diversion dams reduced flow magnitudes, leading to declines in fish richness but increased temperatures, leading to lower abundances in equilibrium species and nest guarders. Peaking and run-of-river dams increased flow variability, leading to lower abundances in nest-guarding fishes. Flow displayed direct relationships with biotic responses; however, results indicated that changes in temperature and substrate had equal, if not stronger, effects on fish assemblage composition. The strength and nature of relationships depended on whether flow metrics were standardized for river size. We suggest that restoration efforts in regulated rivers focus on improving flow conditions in conjunction with temperature and substrate restoration.

scholarly journals Dietary Segregation of Pelagic and Littoral Fish Assemblages in a Highly Modified Tidal Freshwater Estuary

2009 ◽  
Vol 1 (1) ◽  
pp. 200-217 ◽  
Author(s):  
Lenny F. Grimaldo ◽  
A. Robin Stewart ◽  
Wim Kimmerer
Keyword(s):  
Fish Assemblages ◽  
Tidal Freshwater ◽  
Littoral Fish

Annual Variation in Larval Fish Assemblages in a Heavily Regulated River During Differing Hydrological Conditions

2015 ◽  
Vol 32 (6) ◽  
pp. 1207-1219 ◽  
Author(s):  
K.  J.  M. Cheshire ◽  
Q. Ye ◽  
B.  M. Gillanders ◽  
A. King
Keyword(s):  
Annual Variation ◽  
Fish Assemblages ◽  
Larval Fish ◽  
Regulated River ◽  
Hydrological Conditions
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