posted on Mar, 10 2011 @ 03:21 PM
reply to post by GullibleUnderlord
here it is:
Thiamine deficiency in mussels and eider in the Baltic Sea
- cause studies
Project leader: Lennart Balk, Associate professor at Stockholm University
Project duration: 10.01.2010 - 31.12.2013
Previous studies of the Baltic Sea have shown that several species of fish, and now more recently in many species of birds, is suffering from a
vitamin B1 (thiamin) deficiency. The shortage is causing behavioral and reproductive disorders and also leads to excess mortality among both fish and
birds. Overall, the impacts of thiamin deficiency cause a decrease of the affected species' populations, which in turn lead to impossible sustainable
management of the affected species in the Baltic Sea region.
The fact that many species in different animal groups and different ecological niches are affected makes it reasonable to assume that there is a
common underlying cause. It is also very likely that the cause is chemical, because the morbidity and mortality of this kind and of this scale could
never be considered natural.
Aim and working method
The projects primary objective is to determine which chemical factor causes the thiamine deficiency in birds. Suspected substances, selected through
chemical knowledge, will be examined in the laboratory by exposure of birds and fish. Received biochemical symptoms of these laboratory-exposed birds
will be compared with the symptoms of wild birds. The project group intends to focus on the eider (Somateria mollissima) because the species is one of
the most distinctive species in the Baltic Sea which is affected by thiamine deficiency.
Individuals of eider females will be treated with thiamine as a preventive measure prior to reproduction. With the help of radio transmitters, these
individuals can be followed to their reproductive location, where their reproductive outcomes will be compared with the non-treated females in the
area. The status of thiamine will be characterized both chemically and biochemically to obtain full information about the deficiency. The project will
also examine thiamine deficiency variables which are less specific for thiamine deficiency but that probably correlates stronger with the clinical
symptom of affected individuals.
Furthermore, since the blue mussel (Mytilus edulis) is a very important species for both the entire Baltic Sea as an inland sea and as well as the
main food of eider, the project group intend to use this organism as an indicator of thiamine for various local/regional areas of the Baltic Sea. To
characterize changes in the amount of thiamine during the annual cycle in different regions by examining the level of thiamine in mussels in the
entire area will be an important goal of this project. The results obtained during this project will be able to provide important information about
the chemical factors that may be the cause of thiamine deficiency. The project will be documented by photos and film clips and later reported to the
public in connection with the scientific presentation.
edit on 10-3-2011 by stavis because: (no reason given)