A5004490326- Fish Ecology and Management Studies
- Fish Biology and Ecology Studies
- Aquatic Ecosystems and Biodiversity
- Marine and fisheries research
- Aquatic Invertebrate Ecology and Behavior
- Fish biology, ecology, and behavior
- Coral and Marine Ecosystems Studies
- Hydrology and Sediment Transport Processes
- Marine Bivalve and Aquaculture Studies
- Aquatic Ecosystems and Phytoplankton Dynamics
- Hydropower, Displacement, Environmental Impact
- Ichthyology and Marine Biology
- Ecology and biodiversity studies
- Coastal and Marine Management
- Aquatic and Environmental Studies
- Aquaculture Nutrition and Growth
- Isotope Analysis in Ecology
- Environmental Conservation and Management
- Transboundary Water Resource Management
- Marine and environmental studies
- Aquaculture disease management and microbiota
- Identification and Quantification in Food
- Fisheries and Aquaculture Studies
- Marine and coastal ecosystems
- Reproductive biology and impacts on aquatic species
Wageningen University & Research
2015-2025
Delft University of Technology
2023
Institute of Animal Sciences
2016
Netherlands Institute of Ecology
2003
Graduate School Experimental Plant Sciences
1994-1996
University of Aberdeen
1990
Abstract The EU Nature Restoration Law represents an important opportunity for freshwater habitat restoration and, consequently, biodiversity protection. However, a number of challenges must be anticipated in its implementation, which may compromise success. Some aspects, particularly those relating to ecosystems, require more clarification. We use riverine ecosystems illustrate existing ambiguities the proposed legislation and potential consequences leaving these aspects open interpretation...
With a sixth mass extinction looming and freshwater biodiversity declining at unprecedented rates, evaluating ecological efficacy of river restoration efforts is critical in combatting global loss. Here, we present comprehensive study the functioning for fishes 46 projects Rhine, one world's most heavily engineered lowland rivers. Floodplains with permanent, either one- or two-sided lateral connectivity to main channel, favour total fish abundance, are essential as nursery areas riverine...
Downing, A. S., E. Van Nes, J. Balirwa, Beuving, P. Bwathondi, L. Chapman, I. M. Cornelissen, G. Cowx, K. Goudswaard, R. Hecky, H. Janse, Janssen, Kaufman, Kishe-Machumu, Kolding, W. Ligtvoet, D. Mbabazi, Medard, O. C. Mkumbo, Mlaponi, T. Munyaho, Nagelkerke, Ogutu-Ohwayo, Ojwang, Peter, Schindler, Seehausen, Sharpe, Silsbe, Sitoki, Tumwebaze, Tweddle, de Wolfshaar, Dijk, Donk, Rijssel, Zwieten, Wanink, F. Witte, and Mooij. 2014. Coupled human natural system dynamics as key to the...
Abstract Large‐scale anthropogenic river modifications have caused the loss of critical floodplain nursery habitats for riverine fish, leading to population declines. Restoration efforts been implemented recover these habitats, but with varying success. Understanding how larval and juvenile fish use in dynamic environments is essential improving restoration strategies. We assessed ontogenetic shifts habitat by young‐of‐the‐year fishes lower Rhine, analyzing 2167 samples across 18 restored...
1. Large river floodplains are considered key nursery habitats for many species of riverine fish. The lower Volga River (Russian Federation) still relatively undisturbed, serving as a suitable model studying the influence flooding and temperature on fish recruitment in floodplain rivers. 2. We examined interannual variability success young-of-the-year (YOY) relation to flood pulse characteristics rising water temperatures spring. sampled four areas with different regimes, three consecutive...
The ecological efficacy of river restoration projects may change over time, resulting in the loss their function for targeted species. goal this study was to evaluate rheophilic nursery restored floodplain channels by analysing 30 years monitoring data from 12 lower Rhine. We hypothesised that would caused combined effects decreasing flow conditions and succession processes affecting habitat heterogeneity. found area suitability fish almost 4 times higher two-sided connected than one-sided...
Recently the complex of 'large', hexaploid barbs (genus Barbus) Lake Tana, Ethiopia, was revised as 14 species (NAGELKERKE & SIBBING, 1997), seven which were new. This paper describes another new species, Barbus osseensis and summarises major features former (B. crassibarbis, B. megastoma, longissimus, tsanensis, brevicephalus, truttiformis, platydorsus). Figures all fifteen large barb Tana are presented, an identification key for specimens larger than 15 cm standard length is provided. The...
The effects of introducing common carp (CC) and adding artificial feed to fertilized rohu ponds on water quality nutrient accumulation efficiency were studied. All stocked with 15 000 ha−1. Treatments included alone, plus 5000 ha−1 10 CC A comparison was also made between supplementally fed non-fed ponds. overall highest nitrogen (N) phosphorus (P) concentrations observed in ha−1, followed by 0 largest fractions N P inputs accumulating fish, phytoplankton zooplankton subsequently without CC....
Summary 1. Floodplains are a key habitat for foraging, spawning and as nursery many riverine fish species. The lower Volga floodplains (Russian Federation) still relatively undisturbed, while in Europe North America, about 90% of have effectively been lost. 2. We examined relationships between the extent timing spring flood, lateral movements species duration floodplain by sampling during 2006 2007. 3. Only rheophilic species, that released their eggs floodplain, coincided with flood. In...
ABSTRACT Periodic flooding plays a key role in the ecology of floodplain rivers. Damming such rivers can disturb patterns and have negative impact on commercial fish yield. The Volga River, largest river Europe, has regulated flow regime after completion cascade dams. Here, we study effects damming long‐term discharge variability flood pulse characteristics. In addition, evaluate altered ecosystem functioning yields. Our results indicate that both populations Volga–Akhtuba varied...
Alternative reproductive tactics are characterized by the occurrence of discrete alternative morphs that differ in behavioural, morphological and physiological traits within same sex. Although much effort has been made to describe behaviour, morphology physiology such morphs, less invested investigating how overlap there is characteristics natural populations. We studied random population samples invasive Round Goby Neogobius melanostomus from five different localities river Rhine system...
Reproductive segregation among the large barbs Barbus intermedius complex, Cyprinidae , of Lake Tana, Ethiopia, was investigated in mouths and upstream reaches rivers tributary to lake, during spawning seasons 1993 1994. The percentage running fish four morphotypes [Acute (Ac), Bigmouth big‐eye (Be), Intermedius (In), Shorthead (Sh)] peaks with highest water level lake. Large differences are apparent minimum fork length [c. 12 cm for male Sh 28 small‐eye (Se)]. Significant occur temporal,...
Fish populations of nine Ethiopian freshwater lakes were quantitatively sampled with a standardized protocol, using multi-mesh gill nets. In total, 27 species identified, but only 14 common. Based on the common species, fish communities showed large differences in their composition, except for Lake Abaya and Chamo which similar. Most observed one or two lakes. Compared information reported literature present study generally underestimated richness. The empirical model Amarasinghe Welcomme...
Invasions of Ponto-Caspian fish species into north-western European river basins accelerated since the opening Rhine–Main–Danube Canal in 1992. Since 2002, at least five alien have arrived The Netherlands. Four belong to Gobiidae family (Neogobius fluviatilis, Neogobius melanostomus, Ponticola kessleri, and Proterorhinus semilunaris) one Cyprinidae (Romanogobio belingi). These are expected be potentially deleterious for populations four native benthic species: Gobio gobio (Cyprinidae),...
River-floodplain systems are amongst the most productive—but often severely impacted—aquatic worldwide. We explored ecological response of fish to flow regime in a large river-floodplain system by studying relationships between (1) discharge and inundated floodplain area, with focus on spatial temporal patterns lake connectivity, (2) flood volume fisheries catch. Our results demonstrate non-linear relationship inundation considerable hysteresis due differences drainage rate. Inundation...