Abstract
Microstructural growth in the sagittae ofSeastes schlegeli, a viviparous scorpaenid, is described from prenatal larval to early juvenile stages, and related to morphological changes. Embryos and prenatal larvae were extruded from a gravid female from 21 d prior to birth onwards, and released larvae reared and sampled up to 58 d after birth. Eggs hatched in the ovary 14 d prior to birth. At this time, otoliths consisted of a core surrounded by a prominent check, similar to the otolith structure seen in oviparous fishes. Fourteen growth increments had been deposited by birth. The parturition mark it-self comprised a prominent check and narrow growth increment Growth increments were deposited daily from hatching up to 58 d after birth, whereas accessory primordia first appeared in otoliths by ca. 32 d after birth, at a specimen total length of ca. 13 mm. This corresponded to the period during which the larvae metamorphosed into juveniles. Otoliths grew exponentially during the larval stage and linearly during the juvenile stage. when plotted against total length. Growth in total length from hatching to 58 d after birth could be represented by the Gompertz curve.
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Lee, TW., Kim, GC. Microstructural growth in otoliths of black rockfish,sebastes schlegeli, from prenatal larval to early juvenile stages. Ichthyological Research 47, 335–341 (2000). https://doi.org/10.1007/BF02674260
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DOI: https://doi.org/10.1007/BF02674260