demersal [di:'mə:sl]

demersal的基本解释

adj.

居于水底的

与demersal相关的网络例句 [注：此内容来源于网络，仅供参考]

Under light microscope, the egg is an oblated and agglutinated demersal with a narrow perivitelline space; eggs ranged in diameter from 1.95 to 2.38 mm with a mean of 2.18 ± 0.03 mm; their membrane are smooth and they have 5 to 7 cannular keratose egg-filaments; the oil globules are multiple, ranged in diameter from 0.05 to 0.50 mm and in number from 7 to 145 with a mean of 28±2, the position of them migrate during embryonic development; the yolks are ivory-white with no segments, ranged in diameter from 1.00 to 2.30 mm with a mean of 1.90 ± 0.03 mm; the development phases of the embryo are variable. So they were identified as the eggs of one Beloniformes.

在光学显微镜下：卵呈微扁圆形，卵径1.95~2.38mm，粘着沉性；卵黄间隙较窄，卵黄囊呈乳白色，无龟裂；卵膜平滑，在其表面有5~7根细长角质管状卵膜丝；多油球数不定（4~145），油球径0.05~0.50mm，油球在卵黄囊中的位置随不同的发育时期而不断发生变化；胚体处在不同的发育阶段，其特征符合颌针鱼目鱼卵的特征。

Based on otter trawl catch rates of five surveys conducted by South China Sea Fisheries Research Institute from 1961 to 1999, changes in demersal trawling fishery resources in the northern South China Sea were analyzed.

摘 要：利用1961~1999年期间南海水产研究所5次渔业资源调查的底拖网渔获率数据，分析了南海北部底拖网渔业资源的数量变动。

This finding emphasizes the wealth of discoveries to be made in pelagic and deep demersal habitats.

有4个物种生活在靠近海底的地方，它们当中有3种生活在水柱的更高处。

Euphausiids supplied most of the food intake for the pelagic fish communities, followed by copepods, amphipods and sagitta, while the most important food resources for the demersal fishes were shrimps and fishes as well as euphausiids.

磷虾类是中上层鱼类最主要的食物来源，其次是桡足类、端足类和毛颚类；虾类和鱼类是底层鱼类最主要的食物来源，其次是磷虾类。

The eggs, measuring 1.5-1.8 mm in diameter, were demersal strongly sticky, almost spherical in shape, transparent and unpigmented, with a pale yellow yolk and no oil globule and 2.3 - 2.5 mm after absorbing water.

另外采用组织学、组织化学对其原始器官分化，在显微水平上进行了研究，结果表明：成熟卵圆形，卵径1.5～1.8mm，淡黄色、透明、沉性、具强粘性。

与demersal相关的网络解释 [注：此内容来源于网络，仅供参考]

demersal：居于水底的

demerit 缺点 | demersal 居于水底的 | demesmerize 脱离催眠

demersal：水底的

demersalpopulation底栖种群 | demersal水底的 | demesticuser国内用户

demersal：沉于水底的

demerit 记过过失 | demersal 沉于水底的 | demi column 嵌墙柱

demersal：底栖动物

底栖的 benthic | 底栖动物 demersal | 底栖生物 benthos

demersal fish：底栖鱼

deleterious gas 有害气体 | demersal fish 底栖鱼 | Demonstration projects in the field of the environment 环境领域的示范项目