Effects of arsenic on gonadal development in freshwater crab, Somanniathelphusa pax, in Vietnam and Geothelphusa dehaani in Japan
Effects of arsenic on gonadal development in freshwater crab, Somanniathelphusa pax, in Vietnam and Geothelphusa dehaani in Japan
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DOI：
10.1007/s10646-008-0228-7
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发表时间：
2008-06
期刊：
影响因子：
2.7
通讯作者：
S. Yamaguchi;Fritzie Tuble Celino-;Aki Ito;T. Agusa;S. Tanabe;B. Tuyen;C. Miura;T. Miura
中科院分区：
文献类型：
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作者：
S. Yamaguchi;Fritzie Tuble Celino-;Aki Ito;T. Agusa;S. Tanabe;B. Tuyen;C. Miura;T. Miura
为了评估水体砷污染对越南甲壳类动物繁殖的影响，采集了越南湄公河三角洲地区的野生梭子蟹Somanniathelphusa pax，调查了其性腺发育情况，并测定了肝胰腺中的砷浓度。雌蟹卵黄发生延迟与肝胰腺中As积累量增加有关，雄蟹睾丸发育与As积累量无明显相关性。为了阐明As对甲壳类动物性腺发育的影响，我们调查了口服As对日本淡水蟹Geothelphusa dehaani性腺发育的影响。在雄蟹中，精子细胞和精子的出现主要在对照组中观察到，而精母细胞的出现增加后，10微克/蟹3个月的砷。另一方面，在雌性中，次级卵黄球阶段主要占据对照组的卵巢。然而，初级卵黄球阶段逐渐增加后，10微克/蟹砷管理。总之，这些结果表明，这是可能的，在水或食物中的砷污染引起的甲壳类动物的精子发生和卵黄发生延迟。
To estimate the influence of water contamination by arsenic (As) on reproduction of crustaceans in Vietnam, we collected wild freshwater crab Somanniathelphusa pax from the Mekong Delta area in Vietnam, investigated gonadal development, and measured As concentration in hepatopancreas. In female crab, vitellogenesis was delayed in association with the increase of As accumulation in hepatopancreas, whereas there was no significant correlation between testicular development and As accumulation in male crab. To clarify the effects of As on gonadal development of crustaceans, we investigated the effects of oral As administration on gonadal development in Japanese freshwater crab Geothelphusa dehaani. In male crab, the occurrence of spermatids and spermatozoa were predominantly observed in the control group, whereas the occurrence of spermatocytes increased after administration of 10 microg/crab As for 3 months. On the other hand, in females, secondary yolk globule stages mainly occupied ovary of the control group. However, the primary yolk globule stage gradually increased after 10 microg/crab As administration. Together these results indicate that it is possible that As contamination in water or food causes the delay of spermatogenesis and vitellogenesis in crustaceans.