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. The current background information to support this venture is, however, inadequate. We assessed the effectiveness of five substrates (coconut shell, oyster shell, nylon mesh, PVC, and ceramic tile) for harvesting C. tulipa spat from the Densu Delta, Narkwa Lagoon, Benya Lagoon and Whin Estuary, along the coast of Ghana from November 2017 to October 2018. Ceramic tile had the highest mean monthly spat settlement in the Narkwa Lagoon (3451 ± 206 spat m⁻²), Benya Lagoon (1769 ± 145 spat m⁻²) and Whin Estuary (373.1 ± 52.4 spat m⁻²). This settlement was not significantly different from settlement on PVC slats (P > 0.05) with the highest settlement in Densu Delta (2880 ± 294 spat m⁻²). Coconut shell consistently had the least C. tulipa spatfall (P < 0.01). Spat collection with 2 mm nylon mesh was not successful. The under-horizontal surfaces of collectors, [mean (S.E.); 2523.7 ± 66.9 spat m⁻²] had significantly more C. tulipa spatfall than upper-horizontal surfaces [mean (S.E.); 775.2 ± 33.4 spat m⁻²] in the main experiment (P < 0.01). In a separate experiment, a change of orientation from “Face down”/0° to “Face up”/180° did not change the observed profuse under-horizontal settlement of C. tulipa spat on the collectors, suggesting that under-horizontal surfaces were more attractive to C. tulipa spat. Larger-sized C. tulipa spat on under-horizontal surfaces, mean (S.E.) 9.88 ± 0.5 mm, compared to upper-horizontal surfaces, mean (S.E.) 5.99 ± 0.5 mm, of the collectors suggest earlier settlement on the undersides. The effectiveness of collectors correlated positively with dissolved oxygen. Ceramic tiles and PVC slats were the most effective materials for C. tulipa spat collection, hence, their use is recommended for large-scale C. tulipa farming.

西非红树林牡蛎Crassostrea tulipa（Lamarck，1819年）具有改善全球贝类食品生产的潜力，并被西非许多国家考虑用于商业化养殖。但是，目前尚不足以支持该项目。我们评估了从11月开始从加纳海岸的Densu三角洲，Narkwa泻湖，Benya泻湖和Whin河口收获C. tulipa吐露的五种基质（椰子壳，牡蛎壳，尼龙网，PVC和瓷砖）的有效性。 2017年至2018年十月瓷砖曾在Narkwa泻湖（3451±206口角米最高月平均卵附着^-2），Benya泻湖（1769±145口角米^-2）和Whin河口（373.1±52.4吐水米^-2）。该沉降与PVC板条的沉降无显着差异（P > 0.05），其中Densu三角洲的沉降最高（2880±294 spt m ^-2）。椰子壳始终具有最小的C. tulipa吐口水（P <0.01）。用2毫米尼龙筛网收集口水不成功。收集器的水平表面以下，[平均（SE）；2523.7±66.9口角米^-2 ]具有显著更C.郁金香苗附着比上水平表面[平均值（SE）; 主要实验中为775.2±33.4磅m ^-2 ]（P<0.01）。在一个单独的实验中，从“ Face down” / 0°更改为“ Face up” / 180°的方向并没有改变观察到的C. tulipa吐痰在收集器上的大量水平下沉降，表明水平下表面对C. tulipa吐口水更具吸引力。在水平面下，较大的C. tulipa吐口，平均（SE）9.88±0.5 mm，而在水平面上，平均（SE）5.99±0.5 mm，表明下侧较早沉降。收集器的有效性与溶解氧呈正相关。瓷砖和PVC板条是C. tulipa吐痰最有效的材料，因此，建议将其用于大规模的C. tulipa 农业。