查询词典 veliger

The snail was found to have an indirect developmental type in the early development. The fertilized eggs were oval-shaped and discoidal cleavage. Embryonic development stages were divided into cleavage, blastula, gastrulae, trochophore, and intra-membrane veliger. Larval development stages included veliger, late veliger and crawling larvae metamorphosed to juvenile.

结果表明：黄口荔枝螺卵囊高度平均为7.33 mm，卵粒数量平均为165粒；黄口荔枝螺的早期发育属间接发生型，受精卵呈椭圆形，卵裂为盘状卵裂；在卵囊内，胚胎发育包括卵裂期、囊胚期、原肠胚、膜内担轮幼虫、膜内面盘幼虫；幼虫发育包括面盘幼虫、后期面盘幼虫和匍匐幼虫。

Dominant species were comprised of mainly micro- and meso-zooplankton species and planktonic larvae of benthos such as Parvocalanus crassirostris, Cirripedia nauplius, Oithona attenuata, Acrocalanus gibber, Nauplius, Bivalvia veliger, Copepodite, Oithona simplex and so on.

优势种主要是中小型种类和底栖动物的幼虫，如强额孔雀哲水蚤、蔓足类无节幼虫、细长腹剑水蚤、驼背隆哲水蚤、无节幼虫、双壳类面盘幼虫、桡足幼体、简长腹剑水蚤等。

At the mixed nutrition stage larvae lived on nutriment from yolk sac and oil globules, in addition to feeding on particulate organic detritus containing Tintinnopsis spp., also on few of trochophore and veliger of bivalve and trochophore of Polychaeta in water of the earthen ponds.

混合营养期仔鱼除依靠吸收卵黄囊和油球为营养以外，还从土池水体中摄食含有拟铃虫的颗粒有机碎屑以及少量的双壳类担轮幼体、面盘幼体和多毛类担轮幼体。

In this paper, we studied M. meretrix ferritin, cathepsin B and caspase genes, which are involved in clam larval shell formation, nutrition, metabolism and apoptosis, respectively. We have cloned the three genes, investigated the temporal and spatial expression profile both at gene and protein level in trochophore (L1), D-veliger (L2), pediveliger (L3) and postlarvae (L4). The potential roles of these proteins were analyzed with specific inhibitors during larval development. Firstly, embryos were found developed into trochophore-like larvae with no shell if cultured at gastrula stage in artificial seawater without iron. Shell-like structures were formed only in the presence of iron. The larvae which had been transferred at L1 stage into ASW developed normal shell. This indicated that iron and iron associated protein are important for larval shell formation. The EST sequence which is homologous with ferritin, which is a principal iron metabolic protein, was selected from the M. meretrix cDNA library. The full-length of ferritin subunit cDNA was cloned by RACE. The results of real-time PCR revealed that the MmeFer mRNA expression changed before and after the larval shell formation.

本论文以文蛤幼虫为研究对象，分别对文蛤幼虫发育过程中贝壳形成相关的铁蛋白、营养及变态相关的组织蛋白酶B及变态过程中细胞凋亡相关的caspase三个基因进行了克隆，分析了基因及编码蛋白在担轮幼虫期(L1)、D形幼虫期(L2)、壳顶幼虫期(L3)和稚贝期(L4)的时空表达特征，解析了其可能的功能，并研究了相应酶类的特异性抑制剂作用对幼虫发育过程的影响，进行了目标蛋白的功能验证，详述如下：研究结果显示，在文蛤胚胎发育到原肠胚时放入不含铁离子的人工海水中培养，发育成无壳的畸形，随着人工海水中铁离子添加浓度的升高，幼虫长出壳状组织接近正常状态；而发育到L1期幼虫放入不含铁离子的人工海水中培养却可以发育出正常的壳，推测铁和铁代谢相关蛋白在幼虫贝壳初始形成有重要的作用。

Acute toxicity test of lead(Pb2+) and cadmium(Cd2+) to Babylonia areolata veliger larvae were studied in this research.

在水温28.4-30.4℃的条件下，分别研究了重金属铅、镉对方斑东风螺幼体的急性毒性影响。

The nutrition-egg were observed from fertilized eggs stage to intra-membrane veliger stage.

从受精卵到面盘幼虫均见营养卵的存在。

The safe concentration of lead and cadmium to B.areolata veliger larvae were also estimated to be 0.107 mg·L-1,0.020 mg·L-1 respectively.

估算得到铅、镉对方斑东风螺幼体的安全浓度分别为0.107 mg·L-1、0.020 mg·L-1。

When water temperature was 26.4±0.45℃, salinity 25.50 and pH 8.0~8.2, C. antiquata veliger with an average shell length of 196 μm, after 72 hours of cultivation, reached attachment metamorphosis at a rate of

在水温26.4±0.45℃，盐度25.50，pH 8.0~8.2的条件下，平均壳长196 μm的西施舌壳顶面盘幼虫经72 h培育，幼虫附着变态率为

Specific activities of protease,lipase,amylase and cellulase of Babylonia areolata Link were measured respectively at 6 different stages from early veliger to juvenile 15 days after metamorphosis.

将方斑东风螺Babylonia areolata的早期发育从早期面盘幼体到变态后15d的稚贝分成6个阶段，分别测定各阶段蛋白酶、脂肪酶、淀粉酶和纤维素酶活性。

The Veliger larvae of Crassostrea gigas swan regularly in the water column under the ambient pressure, either in a vertically orientated lineal or spiral pathway.

在正常大气压下，太平洋牡蛎面盘幼虫的游泳较为舒缓，压力提高时，表现为快速的直线运动或螺径小而螺距大的螺旋运动，并出现更频繁的下沉行为，表明幼虫的紧张度已提高。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失