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Relationships between otolith microstructure, otolith growth, somatic growth and ontogenetic transitions in two cohorts of windowpane
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Otolith increments in larval and juvenile windowpane Scophthalmus aquosus can provide an estimate of daily age for spring‐spawned individuals held under summer conditions. Otolith increments for spring‐ and autumn‐spawned individuals occurred at intervals >1 day under winter conditions. A significant decrease in the slope of the linear relationship between otolith size and somatic size at 40 mm LS coincided with significant habitat, morphological and behavioural transitions. In smaller, field‐captured windowpane belonging to spring‐ and autumn‐spawned cohorts, the formation of accessory growth centres coincided with a transitional settlement period and the completion of eye migration (c. 8–20 mm LS). Back‐calculated growth rate estimates for spring‐spawned windowpane were significantly faster than those for autumn‐spawned windowpane and these differences could produce differential rates of survival for the two cohorts during the first year of life.
Title: Relationships between otolith microstructure, otolith growth, somatic growth and ontogenetic transitions in two cohorts of windowpane
Description:
Otolith increments in larval and juvenile windowpane Scophthalmus aquosus can provide an estimate of daily age for spring‐spawned individuals held under summer conditions.
Otolith increments for spring‐ and autumn‐spawned individuals occurred at intervals >1 day under winter conditions.
A significant decrease in the slope of the linear relationship between otolith size and somatic size at 40 mm LS coincided with significant habitat, morphological and behavioural transitions.
In smaller, field‐captured windowpane belonging to spring‐ and autumn‐spawned cohorts, the formation of accessory growth centres coincided with a transitional settlement period and the completion of eye migration (c.
8–20 mm LS).
Back‐calculated growth rate estimates for spring‐spawned windowpane were significantly faster than those for autumn‐spawned windowpane and these differences could produce differential rates of survival for the two cohorts during the first year of life.
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