...
首页> 外文期刊>Archives of Environmental Contamination and Toxicology >DDT and the Decline of Free-Tailed Bats (Tadarida brasiliensis) at Carlsbad Cavern, New Mexico
【24h】

DDT and the Decline of Free-Tailed Bats (Tadarida brasiliensis) at Carlsbad Cavern, New Mexico

机译:DDT和新墨西哥州卡尔斯巴德洞穴的无尾蝙蝠(Tadarida brasiliensis)下降

获取原文
获取原文并翻译 | 示例
           

摘要

DDT is believed to have caused the population of Brazilian free-tailed bats (Tadarida brasiliensis mexicana) at Carlsbad Cavern to decline severely after 1936. Nevertheless, previous data supporting this hypothesis are limited to a single study from 1974, which indicated that 20% of young free-tails from the cavern may have died of DDE poisoning during their first southward migration. In this study I compared organochlorine residues among samples of free-tails collected in Carlsbad Cavern in 1930, 1956, 1965, 1973, and 1988. Samples of skin cut from dry museum specimens were chemically analyzed, except for the 1973 data, which were derived from analyses of whole bats minus gastrointestinal tracts. Accumulated residue levels of DDT compounds in bats from 1965 and 1956 exceeded those in 1973 bats by ≈ 4.8 times and ≈ 2.7 times, respectively. This suggests that lethal effects of DDT compounds were substantially greater in the 1950s and 1960s than in the 1970s. Residues in 1988 bats resembled those for 1973 bats. It is concluded that DDT played a major role in this severe population decline. These results can be applied by management personnel in evaluating the present and future status of this population regarding persisting organochlorine insecticides as well as other agricultural chemicals now in use. The case of the Carlsbad colony is discussed relative to the general issue of other bat population declines.
机译:据信,滴滴涕已导致1936年后卡尔斯巴德洞穴内的巴西无尾蝙蝠(Tadarida brasiliensis mexicana)数量急剧下降。尽管如此,以前支持这一假说的数据仅限于1974年的一项研究,该研究表明,DDT仅限于1974年的一项研究。洞穴中的幼小尾巴在第一次向南迁移时可能死于DDE中毒。在这项研究中,我比较了1930年,1956年,1965年,1973年和1988年在卡尔斯巴德卡弗恩(Carlsbad Cavern)采集的无尾鱼样本中的有机氯残留量。对从干燥博物馆样本中切下的皮肤样本进行了化学分析,但1973年的数据除外从整个蝙蝠减去胃肠道的分析得出。 1965年和1956年蝙蝠中DDT化合物的累积残留量分别比1973年蝙蝠的≈4.8倍和≈2.7倍。这表明,滴滴涕化合物的致死作用在1950和1960年代比在1970年代要大得多。 1988年蝙蝠的残id与1973年蝙蝠的残embl相似。结论是,滴滴涕在人口严重减少中发挥了重要作用。管理人员可以将这些结果用于评估该人群有关持久性有机氯杀虫剂以及目前正在使用的其他农药的现状和未来状况。关于卡尔斯巴德(Carlsbad)殖民地的案例,是与其他蝙蝠种群减少的一般性问题相关的。

著录项

  • 来源
  • 作者

    D. R. Clark Jr.;

  • 作者单位

    Columbia Environmental Research Center U.S. Geological Survey Biological Resources Division Department of Wildlife and Fisheries Sciences Texas AM University College Station Texas 77843 USA;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号