Larval abundance, and timing of peaks in abundance for both O. These different types included Chinese hats, Vexar mesh, PVC tubes, and four types of bivalve shells. The results of four different experiments investigating larval abundance, and the use of seven different types of suspended spat collectors in seven locations in the SW Netherlands were compared. N2 - Efficient spat collection is essential to both the successful restoration and cultivation of the European flat oyster (Ostrea edulis). T1 - Optimization of off-bottom spat collectors for restoration and production of the European flat oyster (Ostrea edulis) in Dutch coastal waters edulis spat collectors intended for reef restoration purposes but may need further development for cultivation application.", Suspended sacks of bivalve shells show great promise as O. Fouling was heavy and may have prevented larval settlement on collectors deployed too early. In general, most spat were observed on collectors deployed 1–2 weeks after the peak in larval abundance was detected. The most successful spat collectors were sacks of bivalve shells. edulis and the non-indigenous Pacific oyster (Crassostrea gigas) varied between locations and years.
edulis spat collectors intended for reef restoration purposes but may need further development for cultivation application.Ībstract = "Efficient spat collection is essential to both the successful restoration and cultivation of the European flat oyster (Ostrea edulis). penguin spat were collected during the study, and a significant proportion of these settled on the outer mesh bag of the spat collector.Efficient spat collection is essential to both the successful restoration and cultivation of the European flat oyster (Ostrea edulis). penguin settled at the highest densities at 6 m in March/April 1995 (mean recruitment per collector +/- SE 46.2 +/- 6.7). No significant difference in recruitment densities between 2 m and 6 m were recorded for P. margaritifera spat were collected during the study, with the recruitment peak (mean density 7.1 +/- 1.1 spat per collector unit) recorded between May and June 1995. Some species showed brief and temporally isolated types of spawning and associated recruitment pulse of temperate species, whereas the majority displayed peaks in recruitment intensity. All species collected showed seasonal variation in recruitment intensity. However, collection of eight species of Pinctada (2,628 spat) and Five species of Pteria (approximately 1,200 spat) included species presently used in commercial pearl culture operations throughout the Indo Pacific, notably Pinctada margaritifera, Pinctada fucata, Pinctada albina, Pinctada maxima, and Pteria penguin. The majority of this total (20,378) was the non-commercial species Electroma papillionacea (Lamarck 1819). In excess of 21,600 pearl oyster spat were collected from three genera of the family Pteriidae: Pinctada, Pteria, and Electroma. Over 24,900 bivalve spat were counted during the 12 months of study (March 1995 to March 1996). The aim of this study was to identify the pearl oyster species recruiting to spat collectors (50% shade mesh in polyethylene mesh bags) and to examine temporal and depth differences in recruitment at Pioneer Bay Orpheus Island, Great Barrier Reef, Australia.
0 kommentar(er)
