scholarly journals Factors influencing riverine fish assemblages in Massachusetts

2011 ◽  
Author(s):  
David S. Armstrong ◽  
Todd A. Richards ◽  
Sara B. Levin
Keyword(s):  
Fish Assemblages ◽  
Factors Influencing ◽  
Riverine Fish

Spatially based methods to assess the ecological status of riverine fish assemblages in European ecoregions

2007 ◽  
Vol 14 (6) ◽  
pp. 441-452 ◽  
Author(s):  
S. SCHMUTZ ◽  
A. MELCHER ◽  
C. FRANGEZ ◽  
G. HAIDVOGL ◽  
U. BEIER ◽  
...  
Keyword(s):  
Fish Assemblages ◽  
Ecological Status ◽  
Riverine Fish

Corrigendum to: Depth-related composition and structuring of tropical riverine fish assemblages revealed by baited video

2017 ◽  
Vol 68 (10) ◽  
pp. 1976
Author(s):  
Stephen Cousins ◽  
Mark J. Kennard ◽  
Brendan C. Ebner
Keyword(s):  
Fish Assemblages ◽  
Cost Effective ◽  
Water Clarity ◽  
Sampling Effort ◽  
Underwater Video ◽  
Video Footage ◽  
Eastern Australia ◽  
North Eastern ◽  
Lutjanus Argentimaculatus ◽  
Riverine Fish

The aim of the present study was to determine whether boat-based deployment of remote underwater video cameras is effective for surveying fish assemblages in the deepest reaches of two large tropical rivers in north-eastern Australia. In addition, we compared fish assemblages recorded on baited versus unbaited cameras, and evaluated the sampling effort (duration of recording) required to estimate fish assemblages using remote underwater videos. We found that fish assemblages differed according to the depth, with statistically significant differences largely attributable to the prevalence of small-bodied species (Ambassis sp., Melanotaenia sp. and Pseudomugil signifer recorded in shallow (0.4–2.0m) and intermediate (2.1–4.9m) depths, and larger-bodied fish species (>10cm TL), such as Lutjanus argentimaculatus, Mesopristes argenteus and Caranx sexfasciatus, in deep water (>5.0m). Estimates of fish assemblage attributes generally stabilised after 60min recording duration, suggesting that interrogation of video footage beyond this duration may not be cost-effective. We conclude that depth is an important consideration when surveying large and deep river fish assemblages and that where water clarity is favourable, underwater video provides one of the means by which an assemblage can be investigated across the entire depth profile.

Factors influencing Fish Assemblages and Species Richness in Subtropical Florida Lakes and a Comparison with Temperate Lakes

1990 ◽  
Vol 47 (11) ◽  
pp. 2137-2146 ◽  
Author(s):  
A. E. Keller ◽  
T. L. Crisman
Keyword(s):  
Species Richness ◽  
Littoral Zone ◽  
Trophic State ◽  
Fish Assemblages ◽  
Temperate Lakes ◽  
Florida Lakes ◽  
Factors Influencing ◽  
Dissolved Aluminum ◽  
The Impact ◽  
Lake Size

From detailed analyses of 36 lakes, we determined that while species assemblages and richness change with lake size, trophic state, and pH, the responses were not as dramatic in Florida as in temperate lakes. At a given pH, there were more species in Florida lakes than in comparable lakes of the temperate zone. The impact of lake size on species richness was also less obvious in Florida lakes. The greater importance of centrarchids, increased contribution of the littoral zone to primary production, and lower dissolved aluminum levels may contribute to greater species richness in Florida lakes than in temperate lakes of comparable pH or size.

scholarly journals Predicting New Zealand riverine fish reference assemblages

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.

scholarly journals Temporal changes in fish abundance in response to hydrological variability in a dryland floodplain river

2009 ◽  
Vol 60 (2) ◽  
pp. 146 ◽  
Author(s):  
Stephen R. Balcombe ◽  
Angela H. Arthington
Keyword(s):  
Fish Assemblages ◽  
Arid Zone ◽  
Fish Fauna ◽  
Abundant Species ◽  
Channel Flows ◽  
Hydrological Variability ◽  
Dryland River ◽  
Floodplain Habitats ◽  
Riverine Fish ◽  
Harsh Conditions

Riverine fish living in unpredictable flow environments tend to be ecological generalists with traits that allow them to persist under highly variable and often harsh conditions associated with hydrological variation. Cooper Creek, an Australian dryland river, is characterised by extreme flow variability, especially in the magnitude, timing and duration of channel flows and floods, which, if they occur, do so mainly in summer. The present study examined the influence of hydrological variability on fish assemblages and abundance in four waterholes in the Windorah reach of Cooper Creek over eight occasions between 2001 and 2004. Antecedent flows had marked influences on fish species richness and assemblage structure. Following high summer flows, all waterholes supported a rich and abundant fish fauna, whereas fewer species and lower numbers were recorded following periods of zero channel flow. Recruitment of three of the four most common and abundant species was enhanced when intermittent flows inundated backwater and floodplain habitats that provide a food-rich environment. Opportunistic responses to rising channel flows and occasional large floods in Cooper Creek help to explain the prominent ‘boom’ patterns of fish production in this arid-zone river, whereas low-level recruitment during periods of low or no flow maintains populations of some species through the ‘bust’.

Seasonal shift in boreal riverine fish assemblages and associated bias in bioassessment

Hydrobiologia ◽  
2016 ◽  
Vol 787 (1) ◽  
pp. 193-203 ◽  
Author(s):  
Tapio Sutela ◽  
Teppo Vehanen ◽  
Ari Huusko ◽  
Aki Mäki-Petäys
Keyword(s):  
Fish Assemblages ◽  
Seasonal Shift ◽  
Riverine Fish
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