Changes in an Exotic Fish Community Assemblage of a Thermal Spring in Central Idaho

2021 ◽  
Vol 81 (2) ◽  
Author(s):  
Skyler Smith ◽  
Bart Gamett ◽  
Ryan Beatty ◽  
Eric Billman
Keyword(s):  
Fish Community ◽  
Thermal Spring ◽  
Exotic Fish ◽  
Community Assemblage ◽  
Central Idaho

scholarly journals Fish Community Assemblages of Mining-Impacted Freshwaters at Prestea, Ghana

2018 ◽  
pp. 1-9
Author(s):  
Osei O. Antobre ◽  
Nat Owusu-Prempeh ◽  
Michael J. Twumasi-Ankrah
Keyword(s):  
Fish Community ◽  
Average Length ◽  
Mesh Size ◽  
Fish Diversity ◽  
Freshwater Ecosystem ◽  
Fish Community Structure ◽  
Average Width ◽  
H Index ◽  
Community Assemblage ◽  
Fish Samples

The study evaluated the fish community assemblage in the sections of the Subri river, the Ankobra river, and the “galamsey” pond within the Prestea community as impacted by alluvial mining activities. Gill nets of length 10 m and mesh size 1.27 cm were used to trap fish of average length 25.25 cm whilst cane baskets were used to trap fish of average width 10.40 cm using the catch and recapture method. All the 46 fish samples identified belong to 10 genera and 5 families. The Chichlidae was the dominant family, accounting for 60% of the total families observed. With an H’ index of 1.57 the Subri river had the most fish diversity in comparison with the Ankobra river and the “galamsey” pond, which had 1.21 and 0.71, respectively. Similarly, the Subri river had a more complex fish community structure than the Ankobra and “galamsey” pond. The dominant species, Oreochromis niloticus, has not yet been evaluated by the IUCN, but the least dominated Brienomyrus brachyistus could be regarded as “least concern”. Notwithstanding, these fish are essential for food by the local communities. There is a possibility that the alluvial mining might have influenced the complexities of fish species communities. Thus conservation efforts must be promoted to sustain fish communities and overall freshwater ecosystem health.

scholarly journals Boreal river impoundments caused nearshore fish community assemblage shifts but little change in diversity: a multiscale analysis

2019 ◽  
Vol 76 (5) ◽  
pp. 740-752 ◽  
Author(s):  
Katrine Turgeon ◽  
Christian Turpin ◽  
Irene Gregory-Eaves
Keyword(s):  
Fish Community ◽  
River Flow ◽  
Spatial Scales ◽  
Temporal Trends ◽  
Ecosystem Functions ◽  
Anthropogenic Factors ◽  
Multiscale Approach ◽  
Sampling Station ◽  
Community Assemblage ◽  
Boreal River

River flow regulation, fragmentation, and changes in water quality caused by dams have varying effects on aquatic biodiversity and ecosystem functions, but are not clearly resolved in boreal ecosystems. We adopted a multiscale approach to quantify fish community trajectories over 20 years using a network of sites spread across four reservoirs in two hydroelectricity complexes in northern Quebec, where other anthropogenic factors have been negligible. Across three spatial scales, we found little evidence of directional temporal trends in diversity relative to reference sites. Using beta-diversity analyses, we also detected a high degree of stability in fish composition over time and space at the complex and reservoir scales. However, changes in species assemblage following impoundment were detected at the scale of the sampling station. At this scale, we found that some species consistently benefited (coregonids and pikes) from impoundment, whereas others were detrimentally affected (suckers and one salmonid). Overall, we conclude that examining different scales is key when trying to understand the impacts of humans on biodiversity and in formulating management recommendations.

Habitat Influence on Fish Community Assemblage in an Agricultural Landscape in Four East Central Indiana Streams

2004 ◽  
Vol 19 (1) ◽  
pp. 141-148 ◽  
Author(s):  
Bridget E. Sullivan ◽  
Leah S. Rigsby ◽  
Andrea Berndt ◽  
Melissa Jones-Wuellner ◽  
Thomas P. Simon ◽  
...  
Keyword(s):  
Fish Community ◽  
Agricultural Landscape ◽  
East Central ◽  
Community Assemblage

Long-term changes in fish community and the impact of exotic fish, between the Nakdong River and Upo Wetlands

2011 ◽  
Vol 34 (1) ◽  
pp. 59-68 ◽  
Author(s):  
Hyun-Bin Jo ◽  
Min-Ho Jang ◽  
Kwang-Seuk Jeong ◽  
Yun-O Do ◽  
Gea-Jae Joo ◽  
...  
Keyword(s):  
Fish Community ◽  
Nakdong River ◽  
Exotic Fish ◽  
Long Term Changes ◽  
The Nakdong River ◽  
The Impact

Local habitat features explain the distribution of the imperiled grass pickerel (Esox americanus vermiculatus)

2019 ◽  
Vol 97 (5) ◽  
pp. 479-487
Author(s):  
J.E. Colm ◽  
N.E. Mandrak ◽  
B.L. Tufts
Keyword(s):  
Fish Community ◽  
Agricultural Land ◽  
Sampling Methods ◽  
Habitat Preferences ◽  
Field Sampling ◽  
Community Assemblage ◽  
Habitat Features ◽  
Community Data ◽  
Local Habitat ◽  
Habitat Variables

We investigated patterns of grass pickerel (Esox americanus vermiculatus Lesueur, 1846) distribution in three watersheds in Ontario, Canada, using site- and reach-scale habitat variables and fish community assemblage data to determine why this species occurs sporadically throughout watersheds despite abundant seemingly suitable, but unoccupied, habitat. Habitat and fish community data were collected using conventional field sampling methods, and reach-scale habitat data were compiled with the aid of a geographic information system. We found that occupied sites had lower baseflow indices and reach slopes but higher conductivity and agricultural land uses than unoccupied sites. More grass pickerel were detected when conductivity, channel cover, and wetlands in the floodplain were highest and bank slopes lowest; this is consistent with habitat preferences described elsewhere in its range. Habitat features at the site scale appeared more important than reach-scale features suggesting that grass pickerel may be using small habitat patches. This study identifies habitat elements important to grass pickerel and offers insights into management implications.

scholarly journals Modeling the fish community population dynamics and forecasting the eradication success of an exotic fish from an alpine stream

2018 ◽  
Vol 223 ◽  
pp. 34-46 ◽  
Author(s):  
Christophe Laplanche ◽  
Arnaud Elger ◽  
Frédéric Santoul ◽  
Gary P. Thiede ◽  
Phaedra Budy
Keyword(s):  
Population Dynamics ◽  
Fish Community ◽  
Exotic Fish ◽  
Community Population ◽  
Alpine Stream

scholarly journals Variation over Time of Length–Weight Relationships and Condition Factors for Four Exotic Fish Species from a Restored Shallow Lake in NE Iberian Peninsula

Fishes ◽  
2020 ◽  
Vol 5 (1) ◽  
pp. 7
Author(s):  
Jorge Rubén Sánchez-González ◽  
Amadeo Arbonés ◽  
Frederic Casals
Keyword(s):  
Shallow Lake ◽  
Fish Community ◽  
Community Dynamics ◽  
Early Summer ◽  
Northern Spain ◽  
Exotic Fish ◽  
Fish Samples ◽  
Natural Range ◽  
Ne Iberian Peninsula ◽  
Over Time

Length–weight relationships (LWRs), condition factors, and their variation over time were analyzed for four exotic freshwater fish (bleak, common carp, pikeperch, and roach) in the Estany d’Ivars i Vila-sana shallow lake in Catalonia, Northern Spain. Fish samples were collected twice a year (early summer and autumn), between 2008 and 2016, by using between three and five multi-mesh nylon gillnets. This study provides novel information about four common exotic fishes outside of their natural range and within the context of a restored shallow lake, where the ichthyologic community is evolving in concordance with the ecosystem conditions and the fish community dynamics.

Long-term changes of the Lake Michigan fish community following the reduction of exotic alewife (Alosa pseudoharengus)

2006 ◽  
Vol 63 (11) ◽  
pp. 2434-2446 ◽  
Author(s):  
David B Bunnell ◽  
Charles P Madenjian ◽  
Randall M Claramunt
Keyword(s):  
Native Species ◽  
Yellow Perch ◽  
Fish Community ◽  
Lake Michigan ◽  
Lake Trout ◽  
Native Fish ◽  
Trawl Survey ◽  
Alosa Pseudoharengus ◽  
Exotic Fish

We used our long-term annual bottom trawl survey (1973–2004) in Lake Michigan to reveal the response of the native fish community to the biological control of a dominant exotic fish, alewife (Alosa pseudoharengus), as well as to changes in total phosphorus and salmonine biomass. Through nonmetric multidimensional scaling, we documented a 1970s community largely dominated by alewife, and then a shift to a community dominated by several native species during the 1980s through 1990s, when alewife remained at relatively low levels. We argue that the recovery of burbot (Lota lota), deepwater sculpin (Myoxocephalus thompsonii), and yellow perch (Perca flavescens) was partially or fully aided by the alewife reduction. We argue that changes in phosphorus or salmonines were not directly related to abundance increases of native species. An additional community shift occurred during 1999–2004, which coincided with a reduction in species richness and total fish biomass in our trawl. The mechanisms underlying this latest shift may be related to reductions in nutrients, but further research is required. The restoration of the native fish community has been incomplete, however, as emerald shiner (Notropis atherinioides), cisco (Coregonus artedii), and lake trout (Salvelinus namaycush) have yet to demonstrate recovery.

Dominance determines fish community biomass in a temperate seagrass ecosystem

2019 ◽  
Author(s):  
Aaron Matthius Eger ◽  
Rebecca J. Best ◽  
Julia Kathleen Baum
Keyword(s):  
Species Richness ◽  
Ecosystem Function ◽  
Fish Community ◽  
Prey Capture ◽  
Fish Communities ◽  
Functional Trait ◽  
Ecosystem Functions ◽  
Community Biomass ◽  
Ecosystem Valuation ◽  
Species Abundances

Biodiversity and ecosystem function are often correlated, but there are multiple hypotheses about the mechanisms underlying this relationship. Ecosystem functions such as primary or secondary production may be maximized by species richness, evenness in species abundances, or the presence or dominance of species with certain traits. Here, we combined surveys of natural fish communities (conducted in July and August, 2016) with morphological trait data to examine relationships between diversity and ecosystem function (quantified as fish community biomass) across 14 subtidal eelgrass meadows in the Northeast Pacific (54° N 130° W). We employed both taxonomic and functional trait measures of diversity to investigate if ecosystem function is driven by species diversity (complementarity hypothesis) or by the presence or dominance of species with particular trait values (selection or dominance hypotheses). After controlling for environmental variation, we found that fish community biomass is maximized when taxonomic richness and functional evenness is low, and in communities dominated by species with particular trait values – those associated with benthic habitats and prey capture. While previous work on fish communities has found that species richness is positively correlated with ecosystem function, our results instead highlight the capacity for regionally prevalent and locally dominant species to drive ecosystem function in moderately diverse communities. We discuss these alternate links between community composition and ecosystem function and consider their divergent implications for ecosystem valuation and conservation prioritization.

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