scholarly journals Effect of recreational‐fisheries management on fish biodiversity in gravel pit lakes, with contrasts to unmanaged lakes

2019 ◽  
Author(s):  
S. MATERN ◽  
M. EMMRICH ◽  
T. KLEFOTH ◽  
C. WOLTER ◽  
R. NIKOLAUS ◽  
...  
Keyword(s):  
Fisheries Management ◽  
Recreational Fisheries ◽  
Fish Biodiversity ◽  
Gravel Pit ◽  
Pit Lakes

scholarly journals Status of aquatic and riparian biodiversity in artificial lake ecosystems with and without management for recreational fisheries: implications for conservation

2019 ◽  
Author(s):  
Robert Nikolaus ◽  
Malwina Schafft ◽  
Andreas Maday ◽  
Thomas Klefoth ◽  
Christian Wolter ◽  
...  
Keyword(s):  
Species Richness ◽  
Fisheries Management ◽  
Diversity Index ◽  
List Type ◽  
Recreational Fisheries ◽  
Artificial Lake ◽  
Study Region ◽  
Gravel Pit ◽  
Lake Morphology ◽  
Pit Lakes

AbstractHumanity is facing a biodiversity crisis, with freshwater-associated biodiversity in a particularly dire state. Novel ecosystems created through human use of mineral resources, such as gravel pit lakes, can provide substitute habitats for conservation of freshwater and riparian biodiversity. However, many of these artificial ecosystems may exhibit high recreational use intensity, which may limit their biodiversity potential.The species richness of several taxa (plants, amphibians, dragonflies, damselflies, waterfowl, songbirds) was assessed and a range of taxonomic biodiversity metrics were compared between gravel pit lakes managed for recreational fisheries (N = 16) and unmanaged reference lakes (N = 10), while controlling for non-fishing related environmental variation.The average species richness of all examined taxa was similar among both lake types and no substantial differences in species composition were revealed when examining the pooled species inventory. Similarly, there were no differences among lake types in the presence of rare species and in the Simpson diversity index across all the taxa that were assessed.Variation in species richness among lakes was correlated with woody habitat, lake morphology (surface area and steepness) and land use, but not correlated with the presence of recreational fisheries. Thus, non-fishing related environmental variables had stronger effects on local species presence than recreational-fisheries management or the presence of recreational anglers.Collectively, no evidence was found that anglers and recreational-fisheries management constrain the development of aquatic and riparian biodiversity in gravel pit lakes in the study region. Conservation of species diversity at gravel pit lakes could benefit from an increasing reliance on habitat enhancement activities.

scholarly journals Impact of recreational fisheries management on fish biodiversity in gravel pit lakes with contrasts to unmanaged lakes

2018 ◽  
Author(s):  
S. Matern ◽  
M. Emmrich ◽  
T. Klefoth ◽  
C. Wolter ◽  
N. Wegener ◽  
...  
Keyword(s):  
Fisheries Management ◽  
Fish Community ◽  
Fish Communities ◽  
Recreational Fisheries ◽  
Gravel Pit ◽  
Α Diversity ◽  
Pit Lakes ◽  
Western Germany ◽  
Gravel Pits ◽  
North Western

AbstractGravel pit lakes constitute novel ecosystems that can be colonized by fishes through natural or anthropogenic pathways. Many of these man-made lakes are used by recreational anglers and experience regular fish stocking. Recreationally unmanaged gravel pits may also be affected by fish introductions, e.g., through illegal fish releases, thereby contributing to the formation of site-specific communities. Our objective was to compare the fish biodiversity in gravel pit lakes with and without the recent influence of recreational fisheries management. We sampled 23 small (< 20 ha) gravel pit lakes (16 managed and 7 unmanaged) in north-western Germany and compared fish community and diversity metrics obtained using littoral electrofishing and multimesh gillnet catch per unit effort data. Given the size of the lakes we sampled we expected species poor communities and elevated fish diversity in the managed systems due to stocking. The two lake types were primarily mesotrophic and did not differ in key abiotic and biotic environmental characteristics. Both lakes types hosted similar fish abundance and biomass, but were substantially different in terms of the fish community structure and species richness. Fish were present in all lakes with at least three species. We discovered a higher α-diversity and a lower β-diversity in managed gravel pit lakes compared to unmanaged lakes. Thus, recreational fisheries management appeared to foster homogenization of fish communities, likely because fisheries managers stock these lakes with desired fish species (e.g., piscivorous fishes and large bodied cyprinids). However, we also detected anthropogenic pathways in the colonization of unmanaged gravel pit lakes, presumably from illegal releases by private people. Importantly, hardly any non-native species were detected in the gravel pits we studied, suggesting that recreational fisheries management not necessarily promotes the spread of exotic species.Significance StatementLittle is known about fish communities in artificially created gravel pit lakes. We compared those managed by recreational fishers with those lacking fisheries management in north-western Germany. We found fishes in all gravel pit lakes and demonstrated a higher α-diversity but more homogenized fish communities in managed gravel pit lakes compared to unmanaged lakes. We did not detect the establishment of relevant abundances of non-natives fishes despite intensive fisheries management.

scholarly journals The Effect of Artificial Recharge on Hydrochemistry: A Comparison of Two Fluvial Gravel Pit Lakes with Different Post-Excavation Uses in The Netherlands

Water ◽  
2016 ◽  
Vol 8 (9) ◽  
pp. 409 ◽  
Author(s):  
Pauline Mollema ◽  
Marco Antonellini ◽  
Alwin Hubeek ◽  
Peter Van Diepenbeek
Keyword(s):  
The Netherlands ◽  
Artificial Recharge ◽  
Gravel Pit ◽  
Pit Lakes

Biodiversity-friendly designs for gravel pit lakes along the Drina River floodplain (the Middle Danube Basin, Serbia)

2018 ◽  
Vol 27 (1) ◽  
pp. 1-22 ◽  
Author(s):  
Bojan Damnjanović ◽  
Maja Novković ◽  
Aleksandra Vesić ◽  
Milica Živković ◽  
Snežana Radulović ◽  
...  
Keyword(s):  
Danube Basin ◽  
River Floodplain ◽  
Gravel Pit ◽  
Pit Lakes

scholarly journals The influence of flow‐through saline gravel pit lakes on the hydrologic budget and hydrochemistry of a M editerranean drainage basin

2015 ◽  
Vol 60 (6) ◽  
pp. 2009-2025 ◽  
Author(s):  
Pauline N. Mollema ◽  
Marco Antonellini ◽  
Enrico Dinelli ◽  
Nicolas Greggio ◽  
Pieter J. Stuyfzand
Keyword(s):  
Drainage Basin ◽  
Gravel Pit ◽  
Pit Lakes ◽  
Hydrologic Budget ◽  
Flow Through

scholarly journals Wintering waterfowl community structure and the characteristics of gravel pit lakes

1997 ◽  
Vol 3 (1) ◽  
pp. 65-78 ◽  
Author(s):  
Michael C. Bell ◽  
Simon N. Delany ◽  
Matthew C. Millett ◽  
Mark S. Pollitt
Keyword(s):  
Community Structure ◽  
Gravel Pit ◽  
Wintering Waterfowl ◽  
Pit Lakes

The effects of environmental factors and fisheries management on recreational catches of perch Perca fluviatilis in the Czech Republic

2019 ◽  
Vol 32 ◽  
pp. 15 ◽  
Author(s):  
Roman Lyach ◽  
Jiri Remr
Keyword(s):  
Environmental Factors ◽  
Central Europe ◽  
Fisheries Management ◽  
Perca Fluviatilis ◽  
Fishing Pressure ◽  
Recreational Fisheries ◽  
The Czech Republic ◽  
Perch Perca Fluviatilis ◽  
Average Body ◽  
Average Body Weight

The Eurasian perch Perca fluviatilis is an important fish species in both commercial and recreational fisheries. However, there is concern that perch populations in Central Europe are decreasing. This study aimed to assess the effects of environmental factors and management on recreational perch catches. Data from individual angling logbooks collected by the Czech Fishing Union on 229 fishing grounds during the period 2005–2016 were used in this study. In total, almost 60 000 perch weighing 17 500 kg were recorded. During the study period, total perch catches decreased by 60%, catch per fishing visit decreased by 70%, average body weight of caught perch increased by 18%, and percentage of fishing grounds with perch catches decreased by 13%. The results indicated that the decreasing catches were due to increasing fishing pressure. Further, fishing grounds with higher fishing visit rates had higher catches in general but lower catch per fishing visit. Larger and more productive rivers also showed higher catches. In contrast, the intensity of fish stocking did not affect catches. In conclusion, perch populations in Central Europe are likely under high fishing pressure, and the pressure is further increasing.

Diversity of cyanobacteria and algae of urban gravel pit lakes in Bratislava, Slovakia: a survey

Hydrobiologia ◽  
2003 ◽  
Vol 506-509 (1-3) ◽  
pp. 155-162 ◽  
Author(s):  
Franti\\checksek Hindák ◽  
Alica Hindáková
Keyword(s):  
Gravel Pit ◽  
Pit Lakes ◽  
Cyanobacteria And Algae
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