Diurnal variation in acoustic densities: why do we see less in the dark? Publication details Journal: Canadian Journal of Fisheries and Aquatic Sciences, vol. 61, p. 2237–2254, 2004 International Standard Numbers: Printed: 0706-652X Electronic: 1205-7533 You are here: Home Publications Scientific article Diurnal variation in acoustic densities: why do we see less in the dark?