99

through September 14, 1975, sampling was conducted in the

open pond and the emergent vegetation immediately

surrounding the pond. Appendix Table A-1 gives the

sampling dates, locations, and number of collections at

each location on each date.

 Collections in the marsh and the eulittoral and

littoral zones of the pond were made with a 1-m ring-framed

throw net (Wegener et al., 1973) and a dip net, both with,

1/16" nylon mesh netting. The ring net was thrown several

feet from the investigator, and the dip net was used to

remove all fish and aquatic invertebrates from the area

inside the ring. The vegetation was removed from the ring

and additional sweeps with the dip net were made until no

more organisms were recovered.

 Initial collecting in the open pond (bottom between

4.5 m and 4.9 m MSL) was made with two 16-sq m square-

framed drop nets (Snedaker and Lugo, 1973), equipped with

1/16" nylon mesh net. The two frames were erected in the

pond, and the nets attached. After 0.5 to 1 hr, the nets

were tripped from a distance of approximately 15 m. Fish

were removed from the area inside the net by seining. A

1/16" nylon mesh seine was used prior to March 21, when a

bloom of phytoplankton clogged the fine mesh and made it

unusable. Thereafter a 1/8" mesh was substituted. Because

no fish small enough to slip through the 1/8" mesh was

caught in the open pond with the 1/16" mesh, no bias in

results with the change in seine mesh size was anticipated.