Effects of mass and position of artificial fouling added to the upper valve of the mangrove oyster Crassostrea rhizophorae on its growth and survival
Effects of mass and position of artificial fouling added to the upper valve of the mangrove oyster Crassostrea rhizophorae on its growth and survival
复制标题
红树林牡蛎上瓣添加人工污垢的质量和位置对其生长和存活的影响
DOI：
10.1016/j.aquaculture.2006.10.002
复制
发表时间：
2007
期刊：
影响因子：
--
通讯作者：
J. Himmelman
中科院分区：
文献类型：
--
作者：
C. Lodeiros;L. Galindo;Esperanza Buitrago;J. Himmelman
我们对红树牡蛎进行了实验，以评估在上部阀上添加不同质量的人工污垢的效果，无论是在底部区域还是在外壳的腹侧边缘。在委内瑞拉La Restinga Lagoon悬浮培养30 d后，对其生长和存活进行量化。人工填充物为水泥，重量为上阀质量的0.5倍、1倍、2倍或3倍。对照组没有添加污垢。结垢质量对壳长生长有影响，而人工结垢位置对壳长生长无影响。然而，只有最严重的污垢（上阀质量的3倍）才有显著的影响。相反，脏污块和脏污位置对组织生长均无影响。最后，我们的数据表明，死亡率可能受到我们添加人工污垢的位置的影响（当污垢添加到外壳的腹缘时死亡率更高），但不受污垢质量的影响。我们的研究表明，在悬浮培养中牡蛎上形成的自然污染水平不太可能足以影响其生长或存活。
We ran an experiment on mangrove oysters Crassostrea rhizophorae to evaluate the effects of adding different masses of artificial fouling to the upper valve, either to the umbo region or the ventral edge of the shell. Growth and survival were quantified after a 30 d period in suspended culture in the La Restinga Lagoon, Venezuela. The artificial fouling was cement weighing 0.5, 1, 2 or 3 fold the mass of the upper valve. No fouling was added to a control group. Fouling mass, but not the position of the artificial fouling, affected growth in shell length. However, only the heaviest fouling (3 times the mass of the upper valve) had a significant effect. In contrast, there was no affect of either fouling mass or position on tissue growth. Finally, our data indicated that mortality could be affected by the position where we added artificial fouling (greater mortality when fouling was added to the ventral edge of the shell), but not by fouling mass. Our study indicates it is unlikely that the levels of natural fouling that develop on oysters in suspended culture would be sufficient to affect either growth or survival.