“…Sampling was done along transects crossing from shore to shore (see Linløkken et al [ 8 , 30 ]), and the degree of coverage S (=Pooled recorded distance/(Lake area) 0.5 ) was larger than 3, as recommended by Aglen [ 61 ], except in three lakes, Lake Hemnessjøen (S = 2.55), Lake Gopollen (S = 2.0), and Lake Furusjøen (S = 0.6), where less than 30% of the surface covered depth >10 m. Fish biomass was calculated by means of the relationship between fish length ( L ) and weight ( W ), expressed as W = a • L b [ 62 ] with species specific parameters a and b. Depending on the species present in the lake, parameters of smelt (a = 1.7 × 10 −6 , b = 3.19, from Storsjøen in Rendalen, unpublished ) were used for fish smaller than 15 cm, parameters of vendace (a = 24.0 × 10 −6 , b = 2.26, from Lake Osensjøen [ 8 ]) were used for fish smaller than 25 cm, and otherwise parameters of whitefish (a = 15.2 × 10 −6 , b = 2.89, from Lake Osensjøen [ 8 ]) or of Arctic charr (a = 6.25 × 10 −6 , b = 3.05, from Lake Sølensjøen [ 54 ]) were used.…”