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Daily Increments in Otoliths and Growth Equation of Black Porgy, Acanthopagrus schlegeli, larvae

Wen‐Bin Huang, Tai‐Sheng Chiu

Open publisher page 7 citations

Abstract

The regression of the number of increments in otoliths (Y) on age in days after hatching (X) of reared larvae of the black porgy, Acanthopagrus schlegeli, was Y = 1.061 + 0.987 X (X = 0, the day the larva hatches). Both the slope and intercept of the regression were not significantly different from 1 (p ＞ 0.05), indicating that otolith growth increments were deposited on a daily schedule after the day of hatching. Growth of larvae was expressed by SL = 2.35 + 0.145 D + 0.0017 D^2 for the first 38 d, where SL is the standard length and D is the age in days. The relationship between maximal otolith radius (OR) and standard length of larvae was fitted by the exponential equation, OR = 1.680 SL^(2.101).

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What this paper is about

The regression of the number of increments in otoliths (Y) on age in days after hatching (X) of reared larvae of the black porgy, Acanthopagrus schlegeli, was Y = 1.061 + 0.987 X (X = 0, the day the larva hatches). Both the slope and intercept of the regression were not significantly different from 1 (p ＞ 0.05), indicating that otolith growth increments were deposited on a daily schedule after the day of hatching. Growth of larvae was expressed by SL = 2.35 + 0.145 D + 0.0017 D^2 for the first 38 d, where SL is the standard length and D is the age in days. The relationship between maximal otolith radius (OR) and standard length of larvae was fitted by the exponential equation, OR = 1.680 SL^(2.101).

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Available abstract

The regression of the number of increments in otoliths (Y) on age in days after hatching (X) of reared larvae of the black porgy, Acanthopagrus schlegeli, was Y = 1.061 + 0.987 X (X = 0, the day the larva hatches). Both the slope and intercept of the regression were not significantly different from 1 (p ＞ 0.05), indicating that otolith growth increments were deposited on a daily schedule after the day of hatching. Growth of larvae was expressed by SL = 2.35 + 0.145 D + 0.0017 D^2 for the first 38 d, where SL is the standard length and D is the age in days. The relationship between maximal otolith radius (OR) and standard length of larvae was fitted by the exponential equation, OR = 1.680 SL^(2.101).

Key concepts: Otolith, Hatching, Larva, Biology, Fishery, Animal science, Ecology, Fish <Actinopterygii>

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