Age, growth, and mortality of the myctophid fish, Benthosema glaciale (Reinhardt), from western Norway

Age and growth of Benthosema glaciale collected by midwater trawl in western Norway have been studied. Otoliths were used for age determination. The mean annual mortality in age groups I to IV was 52%. Older specimens were sparse. Growth was fastest in winter. Back calculation of growth based on otoliths was tried, but the results deviated from those obtained by direct observations of length and age. Benthosema glaciale is shown to grow faster and to have a higher maximum length in Norway than off Nova Scotia