tulipa spat on under-horizontal surfaces, mean (S.E.) 9.88 В± 0.5 mm, compared to upper-horizontal surfaces, mean (S.E.) 5.99 В± 0.5 mm, of the collectors suggest earlier settlement on the undersides.

tulipa spat on the collectors, suggesting that under-horizontal surfaces were more attractive to C. In a separate experiment, a change of orientation from вЂњFace downвЂќ/0В° to вЂњFace upвЂќ/180В° did not change the observed profuse under-horizontal settlement of C. tulipa spatfall than upper-horizontal surfaces in the main experiment (P < 0.01). The under-horizontal surfaces of collectors, had significantly more C.

Spat collection with 2 mm nylon mesh was not successful. Coconut shell consistently had the least C. This settlement was not significantly different from settlement on PVC slats (P > 0.05) with the highest settlement in Densu Delta (2880 В± 294 spat mв€’2).

Ceramic tile had the highest mean monthly spat settlement in the Narkwa Lagoon (3451 В± 206 spat mв€’2), Benya Lagoon (1769 В± 145 spat mв€’2) and Whin Estuary (373.1 В± 52.4 spat mв€’2). tulipa spat from the Densu Delta, Narkwa Lagoon, Benya Lagoon and Whin Estuary, along the coast of Ghana from November 2017 to October 2018. We assessed the effectiveness of five substrates (coconut shell, oyster shell, nylon mesh, PVC, and ceramic tile) for harvesting C. The current background information to support this venture is, however, inadequate. The West African mangrove oyster, Crassostrea tulipa (Lamarck, 1819), has the potential to improve global shellfish food production and is being considered for commercial farming in many countries in West Africa. prismatica for its cultivation in the sea or in estuarine areas. Therefore, our study shows that the strategy of artificially fixing the spat is a necessary activity to ensure the good performance of S. ANOVA did not show significant differences between the sites (blocks) for survival, shell and tissue increases, despite the different environmental conditions characteristic of both areas. After 12 months, artificially fixed animals (regardless of substrate) had significantly higher lengths (в‰€80 mm) and dry tissue masses (в‰€3 g) compared to non-substrate animals (в‰€46 mm and в‰€0.90 g, respectively). In the two culture sites and for all treatments, the animals were confined in black polypropylene culture systems. The performance of these spat in suspended culture at sea and estuarine area, together with the environmental variables of each growing site were registered. In addition, individual non substrate animals from de same cohort were also grown and used as a control. Spat (initially metamorphosed on pieces of shell of 0.5 mmВІ) with a size of 14.00 В± 1.85 mm in dorso-ventral length were artificially fixed on substrates: shells, stones, and plastics. For aquacultural research purposes, we seek to simulate those natural conditions through artificial fixation of spat with an epoxy adhesive. The species lives attached to large rocks, which offer firmness and stability in their high-energy environment.

In this region, the rock oyster Striostrea prismatica is being extracted and consumed massively. The interest in developing a more diverse mollusk aquaculture in the tropical eastern Pacific has increased in recent years.

Barra prismatica