The application of inorganic nitrogen fertilizers on agricultural landscapes has the potential to generate concerns of environmental degradation at fine to coarse scales across the catchment and landscape. Inorganic nitrogen species (NO3*, NO2*, and NH3) are typically associated with subsurface flow processes; however, surface runoff from rainfall events in no-till agriculture with inorganic su...

Flavobacterium psychrophilum is the causative agent of Bacterial Cold Water Disease (BCWD)/ Rainbow Trout Fry Syndrome (RTFS) in rainbow trout Oncorhynchus mykiss. The disease associated with significant mortality farms and thereby responsible for severe economical losses this part aquaculture industry. Vaccination very young life cycle stages not successful due to immature development adaptive...

we investigated the environmental impact of trout farm discharge on zayandeh-rud river. three farms with different production capacities; 250, 25 and 70 tones were assigned to this study. five sampling sites were designated to each farm. benthic macroinvertebrates were collected in autumn, winter, and spring using the quantitative techniques. a total of 11 classes, 16 orders and 53 families&apo...

Herein, data on rainbow trout infections with the copepod Caligus lacustris in cage aquaculture Lake Ladoga is presented. (n = 127 ex.) were collected from a farm housing cage-reared to describe size–age and sex structure of population. Morphological features copepods evaluated according 10 characters terminology proposed by Kabata Gusev (J Linn Soc (Zool) 46(309):155–207, 1966). To determine p...

Large-scale finfish farms are increasingly located in dispersive hard-bottom environments where Laminaria hyperborea forests dominate; however, the interactions between farm effluents and kelp poorly understood. Effects of 2 levels salmonid fish-farming (high low) on L. epiphytic communities were studied by sampling canopy plants from 12 sites high-energy environments. Specifically, we assessed...

Dairy farm effluent (DFE) comprises animal feces, urine, and wash-down water collected at the milking shed. This is collected daily during the milking season and sprayed onto grazed dairy pastures. Urine patches in grazed pastures make a significant contribution to anthropogenic N(2)O emissions. The DFE could potentially mitigate N(2)O emissions by influencing the N(2)O to dinitrogen (N(2)) rat...

For removal of phosphorus (P) from swine liquid manure before land application, we developed a treatment process that produces low P effluents and a valuable P by-product with minimal chemical addition and ammonia losses. The new wastewater process included two sequential steps: (i) biological nitrification and (ii) increasing the pH of the nitrified wastewater to precipitate P. We hypothesized...

In recent years due to climate warming algal blooms have been observed in some boreal lakes during summer and autumn months, which reduces the quality of water. We studied distribution chlorophyll "a" Lake Kroshnozero (North-western Russia) 2021 2022. This lake has used for fisheries more than 50 years, currently there is a trout farm there. influence temperature, turbidity transparency water o...