If you want a pond select a medium area.
Relatively deep ponds were selected for monitoring; many ponds dry out entirely during winter.
The two most heavily used ponds were selected if more than two existed.
The pond was selected because it had been used for sluicing gold ore, and village livestock were observed using this water source.
This acted as a pseudo positive control because the ten fish ponds that were selected and stocked with fingerlings of Tilapia (4 fish/m) were not regularly cleared off of emergent vegetation as would be desired when using fish as a mosquito larval control agent [ 3].
The professional survey comprised 495 randomly selected pond, lake, river, stream and ditch sites.
Areas with extreme conditions (e.g. of soil moisture or soil fertility) and parts of fields adjacent to biotopes (wood edges, pond edges) are selected for conversion into nature conservation spots.
We expected that the higher biotic and abiotic variability of marine and lake environments as compared to pond environments have selected for relatively large brains.
Six randomly selected 200-m2 ponds were partitioned by 1.0-cm mesh plastic net into two compartments: 1/3 of pond area (67 m2) for hybrid catfish and 2/3 (133 m2) for Nile tilapia.
E. crassipes (Water hyacinth) a free floating plant present in aquatic ecosystems, such as ditches, ponds and lakes, was selected for this study.
