COMPARATIVE BIOLOGICAL STUDIES ON THE CONTAMINAITON AND TOXIC EFFECTS BY MAN-MADE CHEMICALS IN THE DEEP-SEA ECOSYSTEM

从日本骏河湾采集的深海和浅水生物体中检测到有机氯（OCs）和丁基锡残留物（BTs）。在有机碳中，多氯联苯（多氯联苯）在深海生物中的残留水平最高，高达2800纳克/克脂重。深海生物体内的生物技术总浓度最高可达980纳克/克（湿重）。骏河湾深海和浅水生物中有机碳的残留水平低于东京湾等工业化地区，而BTs的残留水平相当或更高。这些事实清楚地表明，生物技术对深海生态系统的污染正在扩大。同时，还测定了北太平洋西部中上层海域浮游菌足类鱼体中有机碳和三丁基锡的残留量，以了解其污染状况、积累模式和生物学特性，并对三丁基锡的残留量进行了分析。 ...更多信息 N和分布。在有机氯化合物中，多氯联苯和滴滴涕（滴滴涕及其代谢物）在真菌体内的浓度水平最高（最高浓度分别为370纳克/克和310纳克/克脂肪重量）。CHL（氯丹化合物）或HCH（六氯环己烷）是其次丰富的OCs，HCB（六氯苯）是最低的。鱼类中总生物技术毒素的最大浓度为46纳克/克（湿重）。多氯联苯，叶绿素和苯并三氮唑的浓度低于海洋真菌比日本沿海沃茨。有机碳和苯并三氮唑的残留规律与食物垂直迁移类型有关。在生活在较深沃茨的非洄游鱼类中发现了相对较高浓度的多氯联苯、滴滴涕和氯化铅，而在洄游鱼类中发现了较高浓度的六氯环己烷、六氯苯和苯并三联苯，这些鱼类在夜间为了觅食而洄游到100米以上的水域。这些模式可以影响在北太平洋西部的亚北极和过渡沃茨，在鄂霍次克海的水团入侵已建议的OCs和BT的垂直分布。这一假设可以得到支持的差异，滴滴涕成分之间的myctophids ;即高比例的p，p-滴滴涕在非洄游中层鱼类比移民。在真菌体内发现的有机碳的残留水平和组成的时间变化表明，最近进入海洋环境的滴滴涕的输入量显著减少，而六氯环己烷的下降速度较慢。少

Organochlorine (Ocs) and butyltin residues (BTs) were detected in deep-sea and shallow water organisms collected from Suruga Bay, Japan. Among Ocs, residue levels of PCBs (polychlorinated biphenyls) were the highest in deep-sea organisms with upto 2800 ng/g lipid wt. Total BTs concentrations in deep-sea organisms were found with 980 ng/g wet wt at a maximum levels. Residue levels of Ocs in both deep-sea and shallow water organisms from Suruga Bay were lower than those in industrialized areas like Tokyo Bay, whereas residue levels of BTs were comparable or higher. These facts clearly indicate the expansion of BTs pollution in deep-sea ecosystems. Interestingly, TBT (tributyltin) as a parent compound of BTs was predominant in deep-sea organisms, suggesting ,a fresh input of TBT into the deep-sea environment.Ocs and BTs residues were also determined in mesopelagic myctophid fishes collected from the western north Pacific, in order to elucidate the contamination status, accumulation patter … More ns and distribution. Among Ocs, concentration levels of PCBs and DDTs (DDT and its metabolites) were the highest in myctophids (at maximum concentrations of 370 ng/g and 310 ng/g fat wt, respectively). CHLs (chlordane compounds) or HCHs (hexachlorocyclohexanes) were the next abundant Ocs and HCB (hexachlorobenzene) was the lowest. The maximum concentration of total BTs in fish was found with 46 ng/g wet wt. Concentrations of PCBs, CHLs and BTs were lower in oceanic myctophids than those in Japanese coastal waters. The residue pattern of Ocs and BTs showed a specific trend according to diet vertical migration types of myctophids. Relatively high concentrations of PCBs, DDTs and CHLs were found in non-migratory species living in deeper waters, whereas concentrations of HCHs, HCB and BTs were high in migratory species, which migrate upto the upper 100 m at night for feeding. These patterns can influence the vertical distributions of Ocs and BTs in the subarctic and transitional waters of the western North Pacific, where intrusion of water-mass from the Okhotsk Sea has been suggested. This hypothesis can be supported by the differences in DDT composition among myctophids ; I.e. Higher proportions of p, p-DDT in non-migratory mesopelagic fish than in migrants. Temporal variation in the residue level and composition of Ocs found in myctophids indicated a significant recent decrease in the input of DDTs into the marine environment while HCHs decline at a slower rate. Less