Prioritizing aquatic conservation areas using spatial patterns and partitioning of fish community diversity in a near-natural temperate basin

2012 ◽  
Vol 22 (6) ◽  
pp. 799-812 ◽  
Author(s):  
Yoichiro Kanno ◽  
William T. Russ ◽  
Charles J. Sutherland ◽  
S. Bradford Cook
Keyword(s):  
Spatial Patterns ◽  
Fish Community ◽  
Community Diversity ◽  
Conservation Areas ◽  
Aquatic Conservation

scholarly journals Composition of the ichthyofauna in Brazilian semiarid reservoirs

2017 ◽  
Vol 17 (3) ◽  
Author(s):  
Silvia Yasmin Lustosa Costa ◽  
José Etham de Lucena Barbosa ◽  
Leandro Gomes Viana ◽  
Telton Pedro Anselmo Ramos
Keyword(s):  
Endangered Species ◽  
Arid Region ◽  
Fish Community ◽  
Aquatic Invertebrates ◽  
Fish Fauna ◽  
Community Diversity ◽  
Drainage Basins ◽  
Brazilian Semiarid ◽  
Semi Arid Region ◽  
Semi Arid

Abstract The scale of impact that the São Francisco River transposition project will have on the drainage basins ichthyofauna is still unclear, however, changes in the fish community diversity and abundance is probable. Surveys and registries of the fish fauna within key systems of the catchment basins are priority actions for the conservation of the aquatic diversity. This study conducted a taxonomic survey of the Epitácio Pessoa (Boqueirão municipality) and Argemiro de Figueiredo (Itatuba municipality), reservoirs ichthyofauna, both belonging to the Paraíba do Norte River basin, important socioeconomic and environmental systems for the transposition project. Monthly sampling was carried out between October/2014 to September/2015 in the upstream and downstream zones of the reservoirs. The specimens were collected using dip nets, drag nets, and sieves, and placed on ice in the field. Later in the laboratory, they were transferred to 10% formaldehyde and then preserved in 70% alcohol. A total of 2,328 specimens were collected representing five orders, 14 families, and 31 species in both systems. At the upstream zones 2057 specimens were collected representing 17 species, and at the downstream zones 271 specimens were collected representing 24 species. Of the 31 species recorded, 13 species are endemic to watersheds that drain rivers from the Brazilian semi-arid region, and seven species (Apareiodon davisi, Characidium bimaculatum, Hypostomus pusarum, Parotocinclus jumbo, P. spilosoma, Pimelodella enochi, and Prochilodus brevis) are endemic to the Mid-Northeastern Caatinga Ecoregion (MNCE). Among the latter, Parotocinclus spilosoma and Pimelodella enochi are endemic to the Paraíba do Norte River. Apareiodon davisi is classified as Endangered according to the current published Brazil’s official list of endangered species of fish and aquatic invertebrates. This pre-transposition ichthyofaunistic survey will serve as a basis for future post-transposition analyzes, considering this action will change the scope of the ecosystems diversity.

Relationship between fish community diversity and environmental factors in the Lianjiang River, Guangdong, China

2012 ◽  
Vol 32 (18) ◽  
pp. 5795-5805
Author(s):  
李捷 LI Jie ◽  
李新辉 LI Xinhui ◽  
贾晓平 JIA Xiaoping ◽  
谭细畅 TAN Xichang ◽  
王超 WANG Chao ◽  
...  
Keyword(s):  
Environmental Factors ◽  
Fish Community ◽  
Community Diversity

scholarly journals Fish community assessment with eDNA metabarcoding: effects of sampling design and bioinformatic filtering

2017 ◽  
Vol 74 (9) ◽  
pp. 1362-1374 ◽  
Author(s):  
Nathan T. Evans ◽  
Yiyuan Li ◽  
Mark A. Renshaw ◽  
Brett P. Olds ◽  
Kristy Deiner ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Species Richness ◽  
Spatial Resolution ◽  
Spatial Patterns ◽  
Water Body ◽  
Fish Community ◽  
Sampling Design ◽  
Environmental Dna ◽  
Body Type ◽  
Multiple Samples

Species richness is a metric of biodiversity that represents the number of species present in a community. Traditional fisheries assessments that rely on capture of organisms often underestimate true species richness. Environmental DNA (eDNA) metabarcoding is an alternative tool that infers species richness by collecting and sequencing DNA present in the ecosystem. Our objective was to determine how spatial distribution of samples and “bioinformatic stringency” affected eDNA-metabarcoding estimates of species richness compared with capture-based estimates in a 2.2 ha reservoir. When bioinformatic criteria required species to be detected only in a single sample, eDNA metabarcoding detected all species captured with traditional methods plus an additional 11 noncaptured species. However, when we required species to be detected with multiple markers and in multiple samples, eDNA metabarcoding detected only seven of the captured species. Our analysis of the spatial patterns of species detection indicated that eDNA was distributed relatively homogeneously throughout the reservoir, except near the inflowing stream. We suggest that interpretation of eDNA metabarcoding data must consider the potential effects of water body type, spatial resolution, and bioinformatic stringency.

scholarly journals Using eDNA Metabarcoding to Monitor Changes in Fish Community Composition After Barrier Removal

2021 ◽  
Vol 9 ◽  
Author(s):  
Teja P. Muha ◽  
Deiene Rodriguez-Barreto ◽  
Richard O'Rorke ◽  
Carlos Garcia de Leaniz ◽  
Sofia Consuegra
Keyword(s):  
Community Composition ◽  
Fish Community ◽  
Anguilla Anguilla ◽  
Environmental Dna ◽  
Life Cycles ◽  
Population Connectivity ◽  
Community Diversity ◽  
Additional Species ◽  
Fish Community Composition ◽  
Barrier Removal

Artificial instream barriers are a major cause of habitat fragmentation that reduce population connectivity and gene flow by limiting fish movements. To mitigate their impacts, obsolete barriers are increasingly been removed worldwide, but few barrier removal projects are monitored. We employed a powerful Before-After-Downstream-Upstream (BADU) approach using environmental DNA (eDNA) metabarcoding to examine the effects on fish community composition of removing a weir in the river Lugg (England) that had been suggested to have a detrimental effect on salmonid migration. We found no change in fish community diversity or relative abundance after the removal above or below the weir, but detected an important effect of sampling season, likely related to the species' life cycles. eDNA detected nine fish species that were also identified by electrofishing sampling and one additional species (Anguilla anguilla) that was missed by traditional surveys. Our results suggest that monitoring of barrier removal projects should be carried out to ensure that any ecological benefits are properly documented and that eDNA metabarcoding is a sensitive technique to monitor the effects of barrier removal.

scholarly journals Multidecadal shifts in fish community diversity across a dynamic biogeographic transition zone

2019 ◽  
Vol 26 (1) ◽  
pp. 93-107 ◽  
Author(s):  
Brittany Troast ◽  
Richard Paperno ◽  
Geoffrey S. Cook
Keyword(s):  
Transition Zone ◽  
Fish Community ◽  
Community Diversity

CORRELATION OF MEASURES OF AMBIENT TOXICITY AND FISH COMMUNITY DIVERSITY IN CHESAPEAKE BAY, USA, TRIBUTARIES—URBANIZING WATERSHEDS

1997 ◽  
Vol 16 (12) ◽  
pp. 2556 ◽  
Author(s):  
S. Ian Hartwell ◽  
Celia E. Dawson ◽  
Eric Q. Durell ◽  
Ray W. Alden ◽  
Peter C. Adolphson ◽  
...  
Keyword(s):  
Chesapeake Bay ◽  
Fish Community ◽  
Community Diversity

Fish community ecology in an Altered River delta: Spatial patterns in species composition, life history strategies, and biomass

Estuaries ◽  
2005 ◽  
Vol 28 (5) ◽  
pp. 776-785 ◽  
Author(s):  
Matthew L. Nobriga ◽  
Frederick Feyrer ◽  
Randall D. Baxter ◽  
Michael Chotkowski
Keyword(s):  
Life History ◽  
Species Composition ◽  
Community Ecology ◽  
Spatial Patterns ◽  
Fish Community ◽  
River Delta ◽  
Life History Strategies
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