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Fig. 1. Changes in
O2
and associated fH (filled symbols) and
fV (open symbols) measured simultaneously for 10 min three
times daily in 12 N. angustata (mean ± s.e.m., n=12,
N=36 observations), subjected to the following sequential
measurements. Circles, recordings made for 120 h following initial anesthesia,
surgery and placement in the respirometry chamber; squares, recordings taken
for the subsequent 120 h after ingestion of a 5%b.m. food ration; triangles,
daily recordings made in the same fish after it had returned to pre-fed values
and had then undergone anaesthesia, bilateral section of the vagal nerve and
placement back in the respirometry chamber.