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Table 3 Mean age, in years, of the females and the males used to estimate the sex difference in whole-fish PCB concentrations

From: Sex differences in contaminant concentrations of fish: a synthesis

Species Population Mean age of females Mean age of males Reference
Walleye South Manistique Lake 5.7 (0.3) 5.1 (0.3) 7
Lake trout Lake Ontario 5.5 (0.1) 5.8 (0.1) 8
Coho salmon Lake Michigan 2.0 (0.0) 2.0 (0.0) 3
Burbot Lake Erie 9.8 (0.9) 9.5 (1.0) 22
Burbot Great Slave Lake 11.0 (0.7) 11.5 (0.7) 24
Sea lamprey Lake Huron 1.0 (0.0) 1.0 (0.0) 23
Cisco Lake Superior 7.0 (0.0) 7.0 (0.0) 25
Lake whitefish Lake Huron 10.4 (0.4) 10.9 (0.4) 26
Summer flounder New Jersey coast 3.7 (0.2) 4.2 (0.2) 27
  1. Standard error of the mean enclosed within parentheses
  2. For sea lamprey, age refers to the presumed number of years that the sea lamprey lived in the lake feeding on the blood of other fish before ascending the river to spawn