幼体

The daily feeding rate of Scylla serrata zoea 1(Z1 ), and the effect of feeding and starvation on growth and respiration of larvae were studied . The results showed that: the daily feeding rate of Z1 is increasing with the rise of the density of rotifer, but it has no obvious relation to the development phase.

本文采用实验室和现场测定相结合的方法，研究了锯缘青蟹溞状幼体摄食率、摄食和饥饿对幼体生长发育蜕皮以及呼吸的影响。

The results showed that LC50 were 0.0095 and 0.0082 mg/L at 24 h and 48 h with safe concentration of 0.0018 mg/L for Zoea Ⅰ. For Zoea Ⅱ, LC50 were 0.019 and 0.010 mg/L at 24 h and 48 h with safe concentration of 0.0038 mg/L.

三疣梭子蟹Ⅰ期溞状幼体24 h LC50和48h LC50分别为0.0095 mg/L和0.0082 mg/L，安全质量浓度为0.0018 mg/L；三疣梭子蟹Ⅱ期溞状幼体24 h LC50和48h LC50。

The results show that the effect of promoting growth of Olaquindox is the best one, moreover, this promoter has the effect of prompting growth in different growth periods of Penaeus Orientalis, including zoea larvas, mysis larvas, postlar-vas and juveniles in various growing stages.

结果表明，喹乙醇的促生长效果最佳，且表明喹乙醇在对虾的不同生长期(包括溞状幼体、糠虾幼体、仔虾)及不同生长阶段的幼虾均有促生长作用，因此在人工配饵中添加快育灵是值得推广的。

During the raising fry period,466 000 tails of Zoea were bred up to 101 100 megalopa and 51 400 crab larvas, the survival rate 21.7% and 11.6% respectively.

整个育苗共投放蚤状幼体46.6万尾，培育出大眼幼体10.11万只，成活率为21.7%，培育成仔蟹苗5.14万只，育苗成活率为11.6%。

The safety concentration of ammonia nitrogen on the zoea larvae, mysis larvae and postlarvae was 0.295mg/L, 0.724mg/L, 1.072 mg/L respectively, and that of sulfurated hydrogen was 0.0430mg/L, 0.0553mg/L, 0.0705mg/L.

氨氮和硫化氢对日本对虾蚤状幼体、糠虾幼体和仔虾的安全浓度分别为：0.295，0.0430；0.724，0.0553；1.072，0.0705mg/L。

U 2+, Co 2+ and Mn 2+ whose concentrations were 40, 40, 20μg·L -1 respectively could increase the AKP activity significantly in mysis, but higher con...

o2 +在 2 0μg·L-1时明显提高两种酶的活性。而Ni2 +只使两种酶活性降低。鉴于碱性磷酸酶和ATPase与生长发育直接相关，金属离子对对虾幼体生长的影响与对两种酶活性的影响基本一致，因此体内这两种酶活性的高低可作为判别环境因素是否适合对虾幼体生存的指标。

The influences of some metal ions in seawater treated by Cephlex 100 on metamorphosis, growth and activities of alkaline phosphatase and ATPase in mysis and postlarvae of Chinese prawn Penaeus chinensis were studied.

向经过螯合剂Cephlex 10 0处理的海水中添加金属离子，进行培养中国对虾糠虾幼体和仔虾幼体，观察金属离子对变态发育及其体内碱性磷酸酶和ATPase活性的影响。

Neurogenesis and development of the central nervous system in the embryo stage of swimming crabs, Portunus trituberculatus, were studied by the histological method.

应用组织学方法研究三疣梭子蟹胚胎期中枢神经系统的发生和发育，光学显微镜下镜检切片，在第二期卵内无节幼体阶段开始观察到脑；第二期卵内状幼体阶段，前脑由视神经层、侧原脑和中央原脑组成，与位于食道两侧的中脑和后脑形成完整的脑。

Nauplii metamorphosed into protozoea I at salinities of 25 ppt and 30 ppt earlier than at 20 ppt and 35 ppt at temperatures of 25°C and 30°C, whereas no regularity in time length existed among salinities at 20°C.

在温 度25及30℃的情况下，无节幼体变态成蚤状幼体第一期所需时间，在盐度25及30ppt较盐度20及35ppt短；但在温度20℃的情况下，盐度对变态时间没有影响。

The multivescicular bodies, lamellar bodies and mitochondrias were more than those were at light adaptation. The pigment granules located only in distal and proximal region of the retinular cell.

三。红螯螯虾幼体复眼的形态和超微结构应用电镜技术对红螯螯虾幼体复眼的形态和超微结构进行了研究。

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