The study's aim was to assess the robustness of farm-type anaerobic digestion with cattle slurry as main feedstock under change co-feedstock type and quality. Fish biomass, rainbow trout offal, potato, reindeer offal were investigated possible co-feedstocks in a 428-day semi-continuous reactor experiment. Using fish biomass or (19 % VS feed) produced an average 220 305 L CH 4 /kg compared 201 f...

The aetiological agent of infectious salmon anaemia (ISA) is an orthomyxo-like virus with a negativestranded RNA genome consisting of eight segments (Dannevig, Falk & Namork 1995; Falk, Namork, Rimstad, Mjaaland & Dannevig 1997; Mjaaland, Rimstad, Falk & Dannevig 1997). The ISA virus (ISAV) constitutes the only member of the Isavirus genus (Kawaoka, Cox, Haller, Hongo, Kaverin, Klenk, Lamb, McC...

Widespread occurrences of endocrine-disrupting chemicals (EDCs) in waterways have attracted a great attention of the scientific community. While scientific evidence associated with human health is restricted due to the long-term effects, impacts of EDCs on trout at the common concentration encountered in sewage effluent have been confirmed by both in vitro and in vivo studies. The impacts of st...

Problem: The Dutch aquaculture industry is based on fish production in recirculating aquaculture systems. Enforced by legislation the fish farmers have to reduce the waste discharge and are not allowed to discharge farm effluents on the surface waters. The government expresses waste discharge in inhabitant equivalents (I.E = average daily waste production of 1 person during 1 year, expressed in...

Serious shrimp-disease outbreaks have reduced shrimp production and slowed industry growth since 1991. This paper tests factors such as farm sitting and design, and farm-management practices for relationships with disease occurrence. Logistic regression is used to analyze farm-level data from 3951 shrimp farms in 13 Asian countries. Disease occurrence is modeled as a 0-1 variable where 1 = dise...

the gamasiab river has one of the highest discharge in the western iran receiving wastewater of trout frames. the present study investigated effects of wastewater using bioassessment of benthic organisms. the benthos were sampled over four seasons using a surber sampler on four stations, upstream, on the farm outlet, 500 and 1000 m down the farm outlet. 5454 benthic fauna were identified that w...

this study evaluates the influence of yanã½klar creek on the water quality of fethiye gulf. accordingly, this study demonstrates (i) change in the water quality of fethiye gulf from 2006 to 2007; (ii) the water quality classification of the yanã½klar creek feeding fethiye gulf; and (iii) how land-based fish farm influences yanã½klar creek water quality in a fethiye-gã¶cek specially protected ar...