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Growth of sprat Sprattus sprattus larvae in the German Bight (North Sea) as inferred by otolith microstructure
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Growth of sprat larvae was studied in the German Blght of the North Sea and 2 different
statlons (stratlfled and mixed water masses) were compared. Sprat larvae were aged using dally
growth increments in sagittal otoliths. The daily nature of otolith growth increments was corroborated
using the marginal increment technique. The data presented are consistent with the deposition of one
complete increment per 24 h period, indicating that at least larvae with lengths greater than 11.0 mm
form daily growth increments in their otoliths. There was some evidence that daily growth increments
are deposited on the otoliths of sprat larvae only after the onset of exogenous feeding. Integrated
somatic growth rate was 0.406 mm d-'. This value is comparable to others obtained for similar pelaglc
clupeoid species. There were no significant differences between growth rates at the 2 stations.
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Marine Ecology Progress Series, 96, 139-145