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.

PDF (Published Version) - Published Version Restricted to Repository staff only

 

33

1

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.

Actions (Repository Staff Only)

Item Control Page