Structure of the study stream (inset photograph shows stream habitat) and its associated ponds. The pond 1 is separated from other ponds by a road. Numerator value shows perimeter m and depth m during pre-breeding season while denominator, in bold, show same measurements for breeding-post-breeding season. The distances (m) between ponds (measured from the center of each pond) are given on the right side. Pre-measured ropes of different lengths (10–30 m) were used to mark distances on either side of the stream.