Station A represents the littoral zone
and B and C the limnetic zone.
The littoral zone
of lakes typically functions as a refuge from predation for juvenile fish (Werner and Hall, 1977; Werner et al., 1983; Lehtiniemi, 2005).
Often fed by one or more deep springs, sinkhole lakes are characterized by a narrow littoral zone
; water clarity ranging from clear to slightly stained; and a wealth of offshore structure in the form of bars, drops and holes, some as deep as 30 feet.
The flooded littoral zone
at this season provided an expanded ecological niche for shelter to the early life stages after fertilization (Araoye 1997).
In Michigan lakes, bass typically undergo a discrete niche shift from invertebrates to fish sometime in their 1st yr, when young-of-year (YOY) bluegill become available in the littoral zone
. (Bluegill dominate the biomass of fish communities in these lakes [M.
Movements within the activity area and activity area size.--Radio-location points generally formed clusters within the littoral zone
at depths of 2 m or less (Fig.
Most of the littoral zone
is covered by large banks of aquatic macrophytes, such as Eleocharis interstincta, Typha domingensis, Eichornia crassipes and Nynphaea sp.
A total of 36 enclosures was [TABULAR DATA FOR TABLE 2 OMITTED] used each year, 18 in each of the two habitats, littoral zone
and open water.
In the second phase, researchers will turn their attention to other lake creatures, both in the littoral zone
and open area.