Gastric evacuation rate in mackerel (Scomber scombrus L.)
Original version
This report is not to be quoted without prior consultation with the General Secretary.Abstract
About 1500 mackerel, 25-45 cm in Length, were kept in a net
for l0 days. In two experiments the fish were £ed frozen
euphausiids -ad. libiturn, and the wet weight of the stomach
content determined every second hour for 20-30 hours. The
l' stomachs were then almost empty. Independent of fish size,
the rate of digestion was related to the water temperature
(14.5 - 17.0~~: )f (T)= 0.005 Oexp (0.2-T). The niaximum
l
stomach capacity (wet weight, grams) was a function of fish l
size (total length, cm): w = 0.0087eL 2,21
i
Series
ICES CM documents1983/H:33