all of the major aquatic habitats present in the Pine Hills 
Swamp: shallow heavily vegetated swamps, open stretches of 
water, spring margins, and a beaver pond. Sampling at each 
location was done by minnow seine and/or funnel traps. For 
quantification of data (average number fish per square meter 
and other statistics), the size of the area sampled by minnow 
seine was estimated. Initially sunfishes more than 2 inches 
long were fin-clipped in an attempt to use the "mark-recapture" 
method of estimating population size. After several trips to 
the swamp, it was apparent that too few fish large enough to 
be marked had been encountered, and the marking procedure was 
abandoned. After being identified, measured, and recorded, 
all fish were returned to the water. Ecological notes were 
made at each station on each visit. In addition, oxygen and 
temperature readings were recorded. These measurements were 
taken both in the evening and morning to ascertain differences 
that time of day might make. Temperatures were rather constant 
and influenced by season and proximity of springs but not 
appreciably by sunlight and air temperature during a 24-hour 
period. Dissolved oxygen readings, however, differed sharply, 
except those stations moderated by spring flow and those in 
Open-water stretches subject to wind action. Despite the 
extremely low, morning oxygen levels during the warm months 
for many of the typical swamp stations, no correlation between 
number of fish and amount of dissolved oxygen could be found. 
From February to June pH readings were taken; the values were 
rather consistent (5.3-8.5) throughout the swamp and the season 
and are therefore not discussed. 
Twenty-seven fish species (Table 1) were collected at the eight 
Stations. Lepomis macrochirzus, Pomoxtss annularis, and 
Notemigonus crysolLeucas were especially abundant in the open- 
water habitats seined, and Umbra Limi, Fundulus notti, Gambusia 
absinis, ELassoma zonatum were characteristic of the shallow, 
highly vegetated shoreline habitats throughout the swamp. 
Trapping results were poor and biased. Only 30 individuals of 
five species were collected by trap, and over 90 percent of 
these were Umbra Limi and Aphredoderus sayanus (Table 2). 
Stations 
Following are descriptions of sampling stations (Fig. 1), 
including oxygen and temperature readings, notes on plant 
life, and discussions of the fishes collected. Oxygen readings 
were lumped into two groups: November through March, and April 
through October. During the former time period, biological 
activity (respiration, decomposition, photosynthesis, etc.) 
was at its lowest; in the latter time period activity was at 
its highest. Tables 3 and 4 summarize the oxygen and 
