Yangfan Zhang and his collaborators from University of British Columbia, Canada, used a 10 L Loligo^® swim tunnel to assess the dynamic nature of ṀO_2active near U_crit in rainbow trout (Oncorhynchus mykiss). The researchers used various sampling windows and introduced an iterative algorithm which generated a 23 % higher peak ṀO_2active compared to conventional ṀO₂ sampling rates and interval regression analysis of ṀO_2active.
In the current version of AutoResp, calculating ṀO_2active near U_crit is also possible by enabling the mode “Closed respirometry” during this critical phase. This mode enables you to get MO₂ values on-the-fly for any time interval you prefer!

Full article:

Finding the peak of dynamic oxygen uptake during fatiguing exercise in fish
Yangfan Zhang, Matthew J. H. Gilbert, Anthony P. Farrell (2019)
Journal of Experimental Biology

Link to article