Oxygen consumption and oxygen debt in the common whelk (Buccinum undatum) during aerial storage.
The common whelk (Buccinum undatum; in Danish: Almindelig konk) is subject to fishery in a number of European countries (especially England, with > 19,000 tons landed in 2014). The common whelk is regarded a delicacy in many countries and especially in the Far East. My group has since 2015 been engaged in a project (terminates in 2017) funded by the European Maritime and Fisheries Fund concerning establishment of a whelk fishery in Denmark. The background is to encourage small Danish coastal fishermen to start fishing whelks, which can supply the fishermen with a new and additional source of income. When whelks are landed they are typically stored in air (covered by wet clothes) at about 1 °C. If not further processed within 2 days the whelks will start to loose quality. What the loss of quality is caused by is however not know. A recent bachelor project in my group tested several possibilities, but the results were mostly inconclusive. No significant accumulation of lactic acid or succinate was found (both are markers for anaerobic metabolism). However, re-analysis of some of the samples using a different method (HPLC) showed presence of high lactic acid concentrations. Thus, the above lack of lactic acid might be an artefact. The protein content did not change during experiments (indicating no use of protein for energy metabolism). The energy store (i.e., glycogen) was shown to decrease and to be depleted within approximately 10 days. Whelks are known to have some ability to consume oxygen when aerial exposed. Therefore, it is possible that the whelks have been at least partial aerobic.
|Anvendte metoder:||Intermittent respirometry|
|Keywords:||Common whelk, aerobic and anaerobic metabolism|