Implications of an invasive fish barrier for the long‐term recovery of native fish assemblages in a previously degraded northeastern Illinois River system

Biomonitoring is a common method to monitor environmental change in river ecosystems, a key advantage of biomonitoring over snap-shot physicochemical monitoring is that it provides a more stable, long-term. insight into change that is also effects-based. In New Zealand, the main biomonitoring method is a macroinvertebrate sensitivity scoring index, with little established methods available for biomonitoring of fish. This study models the contemporary distribution of common freshwater fish and then uses those models to predict freshwater fish assemblages for each river reach under reference conditions. Comparison of current fish assemblages with those predicted in reference conditions (as observed/expected ratios) may provide a suitable option for freshwater fish biomonitoring. Most of the fish communities throughout the central North Island and lower reaches show substantial deviation from the modelled reference community. Most of this deviation is explained by nutrient enrichment, followed by downstream barriers (i.e., dams) and loss of riparian vegetation. The presence of modelled introduced species had relatively little on the presence of the modelled native fish. The maps of observed/expected fish assemblage may provide a rapid way to identify potential restoration sites.

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Long-term study of reservoir cascade in south-eastern Brazil reveals spatio-temporal gradient in fish assemblages

Marine and Freshwater Research ◽

10.1071/mf18109 ◽

2018 ◽

Vol 69 (12) ◽

pp. 1983 ◽

Cited By ~ 8

Author(s):

Raquel Coelho Loures ◽

Paulo Santos Pompeu

Keyword(s):

River Basin ◽

Fish Species ◽

Fish Assemblage ◽

Native Species ◽

Fish Assemblages ◽

Native Fish ◽

Fish Diversity ◽

Fish Assemblage Structure ◽

Long Term Study

In reservoir cascades, effects on fish assemblages are expected to strengthen over time and transfer from one reservoir to an adjacent one. To test this, fish-assemblage data from 23 years of monitoring in the Araguari reservoir cascade system, upper Paraná River basin, were analysed. The results showed a clear reduction in richness of native and migratory fish species and an increase of non-native species, following reservoir formation. Migratory species richness was higher in reservoirs that presented habitats similar to lotic stretches or tributaries upstream of the impounded area. There was a clear tendency for native species to decline and non-native fish species to increase, in a downstream direction. Fish assemblages became increasingly dissimilar as reservoirs became more distant from each other (longitudinal gradient) and were dominated by small and medium-sized species. Alongside longitudinal position, reservoir area, age and the presence of herbivorous non-native fish were found to be important predictors of variation in fish-assemblage structure. Results from the present study help clarify the potential accumulated impacts of reservoir cascades on fish diversity, which must be carefully considered in river-basin inventories for hydropower plants, and reinforce the importance of long-term monitoring, considering longitudinal and lateral dimensions of the basin.

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Predicting New Zealand riverine fish reference assemblages

PeerJ ◽

10.7717/peerj.4890 ◽

2018 ◽

Vol 6 ◽

pp. e4890 ◽

Cited By ~ 4

Author(s):

Adam D. Canning

Keyword(s):

New Zealand ◽

Freshwater Fish ◽

Riparian Vegetation ◽

Fish Assemblages ◽

Reference Conditions ◽

Native Fish ◽

River Reach ◽

Riverine Fish ◽

Insight Into

Biomonitoring is a common method to monitor environmental change in river ecosystems, a key advantage of biomonitoring over snap-shot physicochemical monitoring is that it provides a more stable, long-term insight into change that is also effects-based. In New Zealand, the main biomonitoring method is a macroinvertebrate sensitivity scoring index, with little established methods available for biomonitoring of fish. This study models the contemporary distribution of common freshwater fish and then uses those models to predict freshwater fish assemblages for each river reach under reference conditions. Comparison of current fish assemblages with those predicted in reference conditions (as observed/expected (O/E) ratios) may provide a suitable option for freshwater fish biomonitoring. Most of the fish communities throughout the central North Island and lower reaches show substantial deviation from the modelled reference community. Most of this deviation is explained by nutrient enrichment, followed by downstream barriers (i.e. dams) and loss of riparian vegetation. The presence of modelled introduced species had relatively little impact on the presence of the modelled native fish. The maps of O/E fish assemblage may provide a rapid way to identify potential restoration sites.

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Over 50 years of fish community monitoring in Illinois’ large rivers: The evolution of methods used by the Illinois Natural History Survey’s Long-term Survey and Assessment of Large-River Fishes in Illinois

Illinois Natural History Survey Bulletin ◽

10.21900/j.inhs.v41.80 ◽

2019 ◽

Vol 41 (1) ◽

Cited By ~ 2

Author(s):

Mark W. Fritts ◽

Jason A. DeBoer ◽

Daniel K. Gibson-Reinemer ◽

Benjamin J. Lubinski ◽

Michael A. McClelland ◽

...

Keyword(s):

Fish Assemblages ◽

Monitoring Program ◽

Population Monitoring ◽

Fish Population ◽

Large River ◽

Large Rivers ◽

Illinois River ◽

Pulsed Dc ◽

Community Monitoring

This document describes the methodological evolution of the Long-Term Illinois Rivers Fish Population Monitoring Program since its inception. The principal changes include a shift from fixed-site sampling to stratified random sampling at the reach scale to benefit statistical robustness and a concurrent shift from AC electrofishing to pulsed-DC electrofishing to increase the breadth of the diversity and size classes of fishes encountered. These changes in methodology were implemented during the 2016 field season and are based on quantitative assessments of program data and other results from recent peer-reviewed publications. These refinements will likely improve the program’s ability to detect and describe patterns and trends in the fish assemblages of the Illinois River and other large rivers of Illinois and the Midwest.

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Predicting New Zealand riverine fish reference assemblages

10.7287/peerj.preprints.26479 ◽

2018 ◽

Author(s):

Adam D Canning

Keyword(s):

New Zealand ◽

Freshwater Fish ◽

Riparian Vegetation ◽

Fish Assemblages ◽

Reference Conditions ◽

Native Fish ◽

River Reach ◽

Riverine Fish ◽

Insight Into

Biomonitoring is a common method to monitor environmental change in river ecosystems, a key advantage of biomonitoring over snap-shot physicochemical monitoring is that it provides a more stable, long-term. insight into change that is also effects-based. In New Zealand, the main biomonitoring method is a macroinvertebrate sensitivity scoring index, with little established methods available for biomonitoring of fish. This study models the contemporary distribution of common freshwater fish and then uses those models to predict freshwater fish assemblages for each river reach under reference conditions. Comparison of current fish assemblages with those predicted in reference conditions (as observed/expected ratios) may provide a suitable option for freshwater fish biomonitoring. Most of the fish communities throughout the central North Island and lower reaches show substantial deviation from the modelled reference community. Most of this deviation is explained by nutrient enrichment, followed by downstream barriers (i.e., dams) and loss of riparian vegetation. The presence of modelled introduced species had relatively little on the presence of the modelled native fish. The maps of observed/expected fish assemblage may provide a rapid way to identify potential restoration sites.

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Basic principles for assessing the safety of fish products from the ponds exposed to the influence of nuclear fuel cycle enterprises

Medico-Biological and Socio-Psychological Problems of Safety in Emergency Situations ◽

10.25016/2541-7487-2019-0-1-106-114 ◽

2019 ◽

pp. 106-114

Author(s):

A. V. Trapeznikov ◽

V. N. Trapeznikova ◽

A. V. Korzhavin ◽

V. N. Nikolkin ◽

A. P. Plataev

Keyword(s):

Fuel Cycle ◽

Specific Activity ◽

River System ◽

Food Product ◽

Human Consumption ◽

Basic Principles ◽

Fish Products ◽

Permissible Levels ◽

Irtysh River

Relevance. In connection with the development of nuclear energy, many aquatic ecosystems have been exposed to radioactive substances. Fish, as an element of biota, is capable to accumulate radionuclides. However, fish is a traditional food. The control of the technogenic radionuclides accumulation level in the ichthyofauna is an important link in ensuring human security.Intention. To analyze the long-term data on the content of long-lived technogenic radionuclides 90Sr and 137Cs in the ichthyofauna of the Ob-Irtysh river system for the period from 2004 to 2016 and Beloyarsky pond for the period from 1977 to 2018.Methodology. Fish as a food product was assessed according to two criteria: a) permissible levels of specific activity of radionuclides (SanPiN 2.3.2.1078-01); b) using the indicator of conformity B and the uncertainty of its definition В (GOST 32161-2013 and GOST 32163-2013).Results and Discussion. Fish of all species that live in the river Tetcha, is not suitable for food use according to the criteria of SanPiN 2.3.2.1078-01, GOST 32161-2013 and GOST 32163-2013. The fish of the Ob-Irtysh river system, the habitat of which is located outside the Tetcha, meets the requirements for fish products. In the period from 1977 to 1989 in the Beloyarsk pond the accumulations of technogenic radionuclides in fish in quantities exceeding sanitary and hygienic standards were possible. Currently, the fish of the Beloyarsky pond fully complies with the sanitary and hygienic requirements for the radiation factor and is safe for human consumption.Conclusion. In the ponds exposed to the atomic energy enterprises, it is necessary to continuously monitor the content of long-lived technogenic radionuclides in fish and assess their amount in accordance with the requirements of SanPiN 2.3.2.1078-01 and using the conformity indicator В and the uncertainty of its determination В.

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River Quality Models for Consent Setting in England and Wales

Water Science & Technology ◽

10.2166/wst.1989.0303 ◽

1989 ◽

Vol 21 (8-9) ◽

pp. 1015-1024 ◽

Cited By ~ 4

Author(s):

C. P. Crockett ◽

R. W. Crabtree ◽

I. D. Cluckie

Keyword(s):

River System ◽

Quality Model ◽

Catchment Scale ◽

Quality Models ◽

England And Wales ◽

Future Developments ◽

Statistical Framework ◽

River Quality ◽

National Approach

In England and Wales the placing of effluent discharge consents within a statistical framework has led to the development of a new hybrid type of river quality model. Such catchment scale consent models have a stochastic component for the generation of model inputs and a deterministic component to route them through the river system. This paper reviews and compares the existing approaches for consent modelling used by various Water Authorities. A number of possible future developments are suggested including the potential need for a national approach to the review and setting of long term consents.

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Temporal variation of larval fish assemblages of the Murray Mouth in prolonged drought conditions

Marine and Freshwater Research ◽

10.1071/mf12278 ◽

2013 ◽

Vol 64 (10) ◽

pp. 932 ◽

Cited By ~ 6

Author(s):

L. B. Bucater ◽

J. P. Livore ◽

C. J. Noell ◽

Q. Ye

Keyword(s):

Fish Assemblages ◽

Larval Fish ◽

River System ◽

Sampling Period ◽

Marine Species ◽

Flow Regulation ◽

Nursery Areas ◽

Transition Zones ◽

Murray Darling Basin ◽

Drought Conditions

Estuaries are transition zones that link freshwater and marine ecosystems and are often used as nursery areas by fish. The Murray–Darling Basin, which is heavily affected by flow regulation and water extraction, is the largest river system in Australia and terminates at the Murray Mouth estuary. Protracted drought conditions resulted in extremely low flows to the Murray Mouth that affected water condition, fish abundance, community structure and fish use of the estuary (e.g. nursery areas). The aims of the present study were to examine temporal changes in larval fish assemblages in this estuary. The assemblages were dominated by two gobiid species, Arenigobius bifrenatus and Tasmanogobius lasti. There was a noticeable absence or low abundance of freshwater, diadramous and large-bodied marine species that use this estuary for reproductive functions. Monthly differences in larval fish assemblages, between August–September and October–November, were attributed to increases in the abundances of A. bifrenatus in October and November and oscillation in T. lasti during the entire sampling period. The outcomes of the present study suggested that larval fish assemblages in drought conditions are limited to small-bodied species tolerant of high salinities and that freshwater flows are needed for the estuary to function as a nursery for other species.

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Interannual variability of larval fish assemblages associated with water masses in winter in the Taiwan Strait during 2007–2013

Fisheries Science ◽

10.1007/s12562-020-01489-z ◽

2021 ◽

Author(s):

Yu-Kai Chen ◽

Chia-Yi Pan ◽

Yi-Chen Wang ◽

Hsiu-Ju Tseng ◽

Bo-Kun Su ◽

...

Keyword(s):

Fish Assemblages ◽

Larval Fish ◽

Taiwan Strait ◽

Assemblage Structure ◽

Sea Surface ◽

Coastal Current ◽

Annual Variations ◽

Frontal Zones ◽

The Taiwan Strait

AbstractIn this study, the interannual variations of ichthyoplankton assemblages in the Taiwan Strait (TS) during the winters of 2007–2013 were determined. The cold China Coastal Current (CCC) and Mixed China Coastal Water (MCCW) intruded into the TS and impinged with the warm Kuroshio Branch Current (KBC) with annual variations. Consequently, the ichthyoplankton community in the TS was mainly structured into two assemblages characterized by differing environmental conditions. The composition of the warm KBC assemblage was relatively stable and was characterized by Diaphus B and Bregmaceros spp. By contrast, the cold MCCW assemblage demonstrated considerable variations over the years, with demersal Gobiidae and Scorpaenidae families considered the most representative. In addition, Benthosema pterotum and Trichiurus spp. were common in both KBC and MCCW assemblages. The distribution of the KBC assemblage demonstrated sharp boundaries in the frontal zones, whereas changes in the assemblage structure between the frontal zones were gradual for the MCCW assemblage, particularly when demersal taxa were dominant. Sea surface temperature and salinity were most strongly associated with variability in the assemblage structure during the study period. Thus, this paper provides a better understanding of long-term larval fish dynamics during winter in the TS.

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