

FOLLOWUS
1.Marine Biological Research Centre, University of Southern Denmark, Hindsholmvej 11, DK-5300 Kerteminde, Denmark
2.East China Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Shanghai 200090, China
TANG Baojun, bjtang@yeah.net
收稿:2016-10-14,
录用:2016-12-8,
网络首发:2017-02-07,
纸质出版:2018-03
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唐保军. Relationship between oxygen concentration, respiration and filtration rate in blue mussel
Baojun TANG, RIISGÅRD Hans Ulrik. Relationship between oxygen concentration, respiration and filtration rate in blue mussel
唐保军. Relationship between oxygen concentration, respiration and filtration rate in blue mussel
Baojun TANG, RIISGÅRD Hans Ulrik. Relationship between oxygen concentration, respiration and filtration rate in blue mussel
The large water-pumping and particle-capturing gills of the filter-feeding blue mussel
Mytilus edulis
are oversized for respiratory purposes. Consequently
the oxygen uptake rate of the mussel has been suggested to be rather insensitive to decreasing oxygen concentrations in the ambient water
since the diffusion rate of oxygen from water flowing through the mussel determines oxygen uptake. We tested this hypothesis by measuring the oxygen uptake in mussels exposed to various oxygen concentrations. These concentrations were established via N
2
-bubbling of the water in a respiration chamber with mussels fed algal cells to stimulate fully opening of the valves. It was found that mussels exposed to oxygen concentrations decreasing from 9 to 2 mg O
2
/L resulted in a slow but significant reduction in the respiration rate
while the filtration rate remained high and constant. Thus
a decrease of oxygen concentration by 78% only resulted in a 25% decrease in respiration rate. However
at oxygen concentrations below 2 mg O
2
/L
M. edulis
responded by gradually closing its valves
resulting in a rapid decrease of filtration rate
concurrent with a rapid reduction of respiration rate. These observations indicated that
M. edulis
is no longer able to maintain its normal aerobic metabolism at oxygen concentration below 2 mg O
2
/L
and there seems to be an energy-saving mechanism in bivalve molluscs to strongly reduce their activity when exposed to low oxygen conditions.
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