13. EUPHAUSIIDS I N THE MARINE ECONOMY
377
I
approximately 13 litres of euphausiids in 36 sec, a plankton volume far
exceeding that of any of his other hauls made with the N70V net.
Foxton summarized the quantitative data, gathered on various
FIG. 133. The quantitative distribution of euphausiids in the Pacific Ocean in numbers
per 1 000 m3. (After Ponomareva, 1966.)
expeditions, on latitudinal variations in plankton biomass (Fig. 134).
The data are not all expressed in the same units but each group of data
illustrates the same trend of higher standing crops in higher latitudes
except possibly in the highest latitudes where crops may again be lower.
377
I
approximately 13 litres of euphausiids in 36 sec, a plankton volume far
exceeding that of any of his other hauls made with the N70V net.
Foxton summarized the quantitative data, gathered on various
FIG. 133. The quantitative distribution of euphausiids in the Pacific Ocean in numbers
per 1 000 m3. (After Ponomareva, 1966.)
expeditions, on latitudinal variations in plankton biomass (Fig. 134).
The data are not all expressed in the same units but each group of data
illustrates the same trend of higher standing crops in higher latitudes
except possibly in the highest latitudes where crops may again be lower.