Development of eggs of Antarctic krillEuphausia superba in relation to pressure
Development of eggs of Antarctic krillEuphausia superba in relation to pressure
复制标题
南极磷虾卵的发育与压力的关系
DOI：
10.1007/bf00263875
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发表时间：
1985
期刊：
影响因子：
1.7
通讯作者：
J. Strömberg
中科院分区：
文献类型：
--
作者：
R. George;J. Strömberg
本文主要研究了在2°C条件下增加静水压力对磷虾卵发育的影响。本研究是1982-1983年南极夏季在南极帕尔默站进行的超级白蛉胚胎学实验研究。怀孕的雌性是在布兰斯菲尔德海峡的英雄号上捕获的。对早期卵裂期、囊胚期、原肠期和肢芽幼体等胚胎发育阶段进行了定义和描述。这些不同发育阶段的持续时间也在+2°C下建立，并与负温度下该事件的时间进行比较。磷虾胚胎发育在4℃时受到抑制。测定了不同压力下卵和胚的下沉速率。数据表明，压力对下沉速度没有显著影响。在同一窝中，卵的下沉率似乎有很大的差异。在模拟沉降速率模型的基础上，研究了增大压力条件下卵的发育。5-20 atm的压力加速了卵裂速率，因此在5-8 h内达到32细胞阶段，而在1 atm的压力下需要13 h才能达到相同的阶段。因此，压力似乎对磷虾胚胎不同发育阶段的发育持续时间有一定的影响。
This paper focuses upon the influence of increasing hydrostatic pressure on the development of krill eggs at 2°C. This experimental study on the embryology ofEuphausia superbawas conducted at the Palmer Station, Antarctica during the 1982–1983 austral summer. The gravid females were captured from Bransfield Strait aboard theR/V Hero. The various embryological stages such as early cleavage, blastula, gastrula and limb-bud nauplius larva were defined and described. The duration for these various developmental stages at 1 atm was also established at +2°C and compared with the timing of this event at negative temperature. Krill embryonic development is inhibited at 4°C. The sinking rate of eggs and embryos was also measured at various pressure. The data suggest that pressure does not significantly influence the sinking rate. There appears to be a wide variation of sinking rates of eggs within the same brood. based on a simulated model of sinking rate, egg development was studied at increasing pressure. Pressure of 5–20 atm accelerates the rate of cleavage and therefore the 32-celled stage is attained within 5–8 h, while at 1 atm it took 13 h to reach the same stage. Pressure thus seems to have some influence on the duration of the development of different developmental stages of krill embryos.