. T J F M A M âi â 1 â 1 " 1 J J A S O N D Month Figure 23. Seasonal abundance of the dominant macrozooplankton in the hypolimnion (50m to the thermocline) and epilimnion (thermocline to the surface) at the Mid-Lake North station in Flathead Lake during 1988 Densities at MLD were calculated by summing up incremental 10m hauls trom 50m to the surface. Densities at MLN were calculated from 50m to surface hauls from January-June and November, and on the other dates by summing up incremental hauls from 50m to the thermocline and trom the thermocline to the surface.

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