Effects of larval set density on subsequent growth and survival of the silver-lip pearl oyster Pinctada maxima (Jameson)

Taylor, Joseph J., Southgate, Paul C., Rose, Robert A., and Keegan, Anthony J. (1998) Effects of larval set density on subsequent growth and survival of the silver-lip pearl oyster Pinctada maxima (Jameson). Journal of Shellfish Research, 17 (1). pp. 281-283.

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Pediveligers of the silver-lip (or gold-lip) pearl oyster, Pinctada maxima, were placed in 15 settlement vessels at densities of 0.5, 1.0, 1.5, or 2.0 larvae/mL 16 days after fertilization. The number of settled spat per 100 cm² was estimated on Day 23 and again on Day 44. The number of spat/100 cm² in the 1.0 larva/mL treatment was over double, and significantly greater (p < 0.05) than that in the 0.5 larva/mL treatment. Increases in the number of spat per 100 cm² were not significant (p > 0.05) between larval densities of 1.0 and 1.5 larvae/mL and 1.5 and 2.0 larvae/mL. Highest mean survival was observed in the 0.5 larva/mL treatment; however, this was not significantly greater (p >0.05) than that in other treatments. By day 44, spat from the 0.5 larva/mL treatment had a mean antero-posterior shell length (SL) of 1.87 ± 0.08 mm and were significantly larger (p < 0.05) than spat in all other treatments. Spat in the 1.0 larva/mL treatment were significantly larger (p < 0.05) than those in the 1.5 or 2.0 larvae/mL treatments. Differences in Si between the 1.5 and 2.0 larva/mL treatments were not significantly different. Differences in size were most likely attributable to competition for space and food. Based on the results of thisstudy, a setting density of no more than 1.0 larva/mL is recommended for P, maxima. To maximize survival and growth of P. maxima spat, a density approximating 70 spat/100 cm² is recommended.

Item ID: 26992
Item Type: Article (Research - C1)
ISSN: 0730-8000
Keywords: pearl oyster, Pinctada maxima, larvae, settlement, density
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Date Deposited: 10 Jul 2013 02:05
FoR Codes: 09 ENGINEERING > 0907 Environmental Engineering > 090702 Environmental Engineering Modelling @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8301 Fisheries - Aquaculture > 830104 Aquaculture Oysters @ 100%
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