add section about gaping pace and sampling rate, with added citations

1 files changed, 24 insertions, 0 deletions

diff --git a/report.qmd b/report.qmd
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@@ -42,6 +42,30 @@ an alarm is triggered and further laboratory tests are done
 
 This project will implement mechanisms like the polish system.
 
+## Detecting stressful mussel behavior
+
+The use of a mussel as biodetector requires distinction
+between slow-paced valve gaping change (normal),
+paused valve gaping at the closed position (resting or starved)
+and rapid valve gaping change (stressed)
+[@Miller2022 p. 1097; @Robson2006 p. 1200].
+
+Detecting behavioural change to a rapid gaping pace,
+measurements are needed at a much higher sampling rate
+than that of the normal gaping pace.
+E.g. one mussel with normal gaping pace of about 1 minute
+required a sample rate of 5 seconds to detect its normal pace,
+and another mussel with normal gaping pace of 3-4 minutes
+required a sample rate of 0.5 seconds to detect more rapid cycles
+[@Robson2009 p. 195].
+Another measurement of both normal and stressed behaviour,
+assuming that x-axis is in seconds (not hours as indicated),
+similarly shows a need for fast sampling rate
+to detect a normal pace of about 1.2 minutes
+and a stressed pace faster than the visualized resolution
+of about 1 second
+[@FerreiraRodriguez2023 fig. 2].
+
 ## Copyright and licensing
 
 To encourage collaboration and stimulate a circular gift economy