Acronym NA
Category
Aquaculture
Title Distended gut syndrome (DGS) in larval Atlantic cod (Gadus morhua) - do the larvae suffer from diarrhoea? Programme National Programme
Instrument (FP6)
Contact Type (FP7)
Strand (Interreg)
NA
Theme (FP7)
Activity Area (FP6)
Regional Area (Interreg)
Action (COST)
NA
Specific Programme (FP7)
NA
Funding source National Coordinator Ivar Rønnestad Coordinator email ivar.ronnestad@bio.uib.no
Coordinator institution
UiB - University of Bergen (Norway)
Institutions involved
NA
Start year 2008 End year 2009 Funding (€) € 120,000 Website https://prosjektbanken.forskningsradet.no/en/project/FORISS/187281?Kilde=FORISS&distribution=Ar&chart=bar&calcType=funding&Sprak=no&sortBy=date&sortOrder=desc&resultCount=30&offset=0&Organisasjon.3=SAGAFJORD+SEA+FARM+AS Summary A condition in Atlantic cod larvae termed "distended gut syndrome (DGS)" which is associated with mass mortalities in the early larval stage has become a major problem in the past seasons, resulting in unpredictable production outcome and economic results . DGS occurred mainly from 2-3 weeks after hatching, characterized by low activity and reduced appetite. The gut lumen became opaque, distended and filled with fluid. Studies of dying larvae showed high bacterial activity. After SagaFjord Sea Farm has focused on hygiene and improved microbial control, however, a stable larval production becomes possible during live feeds period. On the other hand, the critical window with the similar symptoms has moved to later weaning period, 40-80 days after hatching . Despite a six-fold increase in the production volume last year, the underlying primary biological mechanisms are not fully understood. To maximize and realize the full growth and survival potential in cod fry production, further detailed biological know ledge is essential. Many studies on this problem focus on the bacterial aspect, but it is unknown if the bacterial infections are the primary or secondary cause of the symptoms. Some of the symptoms with a fluid-filled lumen are typical for "diarrheal". Therefore, in the present project, we will examine if DGS is related to diarrhea. The proposed project will focus on the functionality of the digestive system in the post larval cod with the symptoms of DGS in commercial hatchery and examine the underlying biological mechanisms comparing with well-performed larvae. The main goal is to study 1) ion and water homeostasis and 2) digestive function in the larval gut by pinpointing specific genes coding for the characteristic regulatory mechanisms. This know ledge will prospectively offer qualified suggestion for prevention and treatment of the symptoms
Keywords
Cod;
Disease;
Larval rearing;
Larval mortality;
Genetic;
Fish;
Genomic sequencing;
Marine Region
76
Not associated to marine areas
0
Marine Region Map
