Demonstration of a toxicological risk ranking method to correlate measures of ambient toxicity and fish community diversity

1997 ◽  
Vol 16 (2) ◽  
pp. 361-371 ◽  
Author(s):  
S. Ian Hartwell
Keyword(s):  
Fish Community ◽  
Ranking Method ◽  
Community Diversity ◽  
Risk Ranking ◽  
Toxicological Risk

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 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

Priority setting for existing chemicals: European Union risk ranking method

1999 ◽  
Vol 18 (4) ◽  
pp. 772-779 ◽  
Author(s):  
Bjorn G. Hansen ◽  
Anniek G. van Haelst ◽  
Kees van Leeuwen ◽  
Peter van der Zandt
Keyword(s):  
European Union ◽  
Priority Setting ◽  
Ranking Method ◽  
Risk Ranking ◽  
Existing Chemicals
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