挪威龙虾（Nephrops norvegicus (L.)）卵中锰的变化

Variations of manganese in the eggs of the Norway lobster, Nephrops norvegicus (L.).

作者信息

Eriksson SP

机构信息

Göteborg University, Department of Marine Ecology, Kristineberg Marine Research Station, S-450 34, Fiskebäckskil, Sweden

出版信息

Aquat Toxicol. 2000 Mar 1;48(2-3):291-295. doi: 10.1016/s0166-445x(99)00034-x.

DOI:10.1016/s0166-445x(99)00034-x

PMID:10686333

Abstract

The Norway lobster, Nephrops norvegicus, lives on sediments rich in manganese (Mn). Temporal fluctuations of Mn in the eggs of N. norvegicus was investigated, both in the field and in laboratory experiments. Female gonads and external eggs of different developmental stages were measured for Mn. The Mn concentration during oocyte maturation and throughout most of the embryogenesis (after fertilisation) remained stable around 5 µg Mn g(-1) dry wt. egg. At the end of the embryonic development (about 6 months after fertilisation) the Mn concentration of the egg started to increase and had at the time of hatching reached concentrations of 120 µg Mn g(-1) dry wt. egg. The egg shell was at this stage highly permeable and Mn was taken up by the embryo and egg shell in equal amounts.

摘要

挪威龙虾（Nephrops norvegicus）生活在富含锰（Mn）的沉积物中。在野外和实验室实验中，研究了挪威龙虾卵中锰的时间波动情况。对不同发育阶段的雌性性腺和外部卵进行了锰含量测定。在卵母细胞成熟期间以及整个胚胎发育的大部分时间（受精后），锰浓度在每克干重卵约5微克锰的水平保持稳定。在胚胎发育末期（受精后约6个月），卵中的锰浓度开始增加，到孵化时达到每克干重卵120微克锰的浓度。此时卵壳具有高度渗透性，锰被胚胎和卵壳等量吸收。