Assessment of artificial substrates for collection of hatchery-reared silver-lip pearl oyster (Pinctada maxima, Jameson) spat

Taylor, Joseph J., Southgate, Paul C., and Rose, Robert A. (1998) Assessment of artificial substrates for collection of hatchery-reared silver-lip pearl oyster (Pinctada maxima, Jameson) spat. Aquaculture, 162 (3-4). pp. 219-230.

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Abstract

This paper reports on three experiments in which artificial substrates were assessed for the collection of hatchery-reared silver-lip (or gold-lip) pearl oyster, Pinctada maxima (Jameson), spat. In the first experiment, pediveliger larvae were settled onto collectors made from a variety of materials: curved PVC slats; polypropylene rope; a combination of PVC slats and polypropylene rope; and monofilament nylon. After 37 days, the rope and the combined PVC slat and rope collectors had significantly higher numbers of spat (P<0.05) than either nylon or PVC slat collectors. In a second experiment, PVC slat collectors were placed in a larval settlement tank in either a horizontal or vertical orientation. Significantly greater numbers of spat (P<0.001) were observed on horizontally positioned PVC slat collectors than on collectors positioned vertically. Regardless of orientation, the concave surface of PVC slats had significantly higher (P<0.001) numbers of spat than the convex surface. In the third experiment, collection of P. maxima spat was compared between PVC slats with or without an epifloral biofilm. Significantly more (P<0.001) spat attached to PVC slats with a biofilm than clean PVC slats. These results indicate that the choice of collector material, the surface orientation of collectors and method of collector preparation can optimise the collection of hatchery-reared P. maxima spat.

Item ID: 26990
Item Type: Article (Research - C1)
ISSN: 1873-5622
Keywords: pearl oyster; pinctada maxima; spat collector; settlement; spat
Date Deposited: 10 Jun 2013 23:09
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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