Fertilization and early development of coregonines were affected by sulfate in toxicity tests. The sulfate tolerance of brackish water forms of vendace and whitefish was higher than freshwater forms. The lethal concentrations of sulfate toxicity determined in this study provide valuable information for the construction of species sensitivity distributions, and further formulation the water quality guidelines for both brackish and freshwater environments.

There was no association between water level variables and the density of newly hatched whitefish larvae or egg survival. Neither was the average larval density in the regulated lakes generally lower than that in the non-regulated lake. Thus, moderate water level regulation does not drive whitefish population dynamics directly by negatively affecting the life stage from spawning to hatching.

This study assessed the effectiveness of a 3D floating structure (FLOLIZ) mimicking a littoral zone to support northern pike population in a French hydropower reservoir. Visual surveys carried out over 2019-2023 highlighted an annual recurrence of juvenile pike in FLOLIZ and a higher abundance than in the littoral control stations. The results highlighted the potential of FLOLIZ to provide refuge and nursery habitats for juvenile pike in reservoirs.

In this study, we tried to highlight the controlling factors of litter breakdown in African streams using 13 sites in the natural rainforest of South Cameroon. The goals of this study were to highlight the biological and physico-chemical determinants of leaf litter breakdown in streams and to compare those factors to other factors found in temperate and other tropical streams.

The established population of Quistadrilusmultisetosus (Smith, 1900) inhabits a sidearm of the Danube River in Slovakia. This discovery marks a new species for the Slovak fauna and is the first documented record of this species in the Danube River and its floodplain system.

Perialpine lakes face climate warming, impacting coregonine fish populations. The exposition of European whitefish embryos from perialpine populations to actual/cold and future/warm temperatures in the lab reveals strong impact on survival and incubation duration and contrasted ability of populations to cope with warming waters.

The present study evaluated the seasonal variations in hydrographic parameters and trophic status of two selected freshwater ecosystems of southwest India, highlighting their eutrophic to hypereutrophic state. Understanding the trophic status of freshwater ecosystems provides valuable insights into the necessity of mitigation and management practices to safeguard the aquatic ecosystem from deterioration caused by nutrient loading leading to harmful algal blooms.

Our paper developed and evaluated temperature-dependent embryo development modelsfor a group of cold, stenothermic fishes (Salmonidae Coregoninae) to assess the potential impacts of climate-induced changes in water temperature on cisco (Coregonus artedi) from two populations in Lake Superior (Apostle Islands [USA] and Thunder Bay [Canada]) and one in Lake Ontario (USA), vendace (C. albula) in Lake Southern Konnevesi (Finland), and European whitefish (C. lavaretus) in lakes Southern Konnevesi, Constance (Germany), Geneva (France), and Annecy (France). Water temperatures for each study group were simulated and changes in reproductive phenology across historic (1900-2006) and three future climatic-warming scenarios (2007-2099) were investigated. Models predicted that increases in water temperatures are likely to cause delayed spawning, shorter embryo incubation durations, and earlier larval hatching. Relative changes increased as warming scenarios increased in severity and were higher for littoral as compared to pelagic populations. Our simulations demonstrated that slower cooling in the autumn and (or) more rapid warming in spring can translate into substantial changes in the reproductive phenology of coregonines among our study groups. We expect that the changes in reproductive phenology predicted by our models, in the absence of thermal or behavioral adaptation, will have negative implications for population sustainability.

The long-term decline of the whitefish (Coregonus lavaretus) population in the boreal lake Pyhäjärvi, southwest Finland is described. Whitefish decline was associated with decreases in fecundity, winter survival of embryos, and larval density. The spawning stock was kept small by intensive fishery.

Our study introduces the first Bayesian Delay-Difference model adapted to whitefish fisheries in peri-alpine lakes. By analyzing various data, the model accurately estimates annual biomass, recruitment, stage structure of landings, and fishing mortality. These insights are invaluable for comprehending the historical trends and impacts of fishing activities on these stocks.