Size dependent variation in optimum growth temperature of red abalone (Haliotis rufescens)
2003
Steinarsson, A. | Imsland, A.K.
Six size groups of red abalone Haliotis rufescens (geometric mean shell lengths: 21, 25, 33, 66, 81 and 98 mm) were reared on a macroalgal diet for 4 months at seven different temperatures between 11 and 22 °C. The results demonstrate that red abalone exhibit size dependent variation in growth potential and temperature optimum for growth. The maximum growth rate was found to have a skewed, third degree polynomial relationship with shell length, reaching a maximum of 111 micrometer day-1 at 38 mm shell length. The temperature optimum for growth was found to have a symmetrical, concave relationship with shell length from 16 mm to maturity, reaching a peak of 17.8 °C at 44 mm shell length. The minimum grow-out time from spat to market size on an optimum temperature regime was predicted less than 2 years. The results from the present study could contribute to an increase in the potential yield from landbased abalone farming.
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