REPRODUCTIVE IMPAIRMENT IN THE FLORIDA PANTHER - NATURE OR NURTURE
REPRODUCTIVE IMPAIRMENT IN THE FLORIDA PANTHER - NATURE OR NURTURE
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DOI：
10.2307/3432416
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发表时间：
1995-05-01
影响因子：
10.4
通讯作者：
GUILLETTE, LJ
中科院分区：
文献类型：
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作者：
FACEMIRE, CF;GROSS, TS;GUILLETTE, LJ
濒临灭绝的佛罗里达黑豹 (Felis concolor coryi) 种群中的许多剩余成员患有一种或多种生理、生殖、内分泌和免疫系统缺陷，包括先天性心脏缺陷、精子异常、精子密度低、隐睾症、甲状腺功能障碍和可能的免疫抑制。 1989 年，汞污染被确定是导致一只雌性黑豹死亡的原因，也被认为是甲状腺功能障碍的可能原因。由于该物种的遗传多样性低于预期，所有其他异常都归因于近亲繁殖。然而，接触各种化合物，特别是那些已被确定为环境内分泌干扰物的化合物（包括汞、p,p'-DDE 和多氯联苯），已引起其他物种所列的所有异常。南佛罗里达州存在许多此类污染物。暴露途径已经确定，本文提出的证据，包括雄性和雌性血清雌二醇水平似乎没有显着差异的事实，表明许多交配黑豹可能由于产前或产后暴露而被去雄性化和雌性化。因此，无论近亲繁殖的影响如何，目前的证据似乎表明环境污染物可能是导致佛罗里达黑豹种群繁殖障碍的一个主要因素。
Many of the remaining members of the endangered Florida panther (Felis concolor coryi) population suffer from one or more of a variety of physiological, reproductive, endocrine, and immune system defects including congenital heart defects, abnormal sperm, low sperm density, cryp-torchidism, thyroid dysfunction, and possible immunosuppression. Mercury contamination, determined to be the cause of death of a female panther in 1989, was presented as the likely cause of thyroid dysfunction. As genetic diversity in the species was less than expected, all of the other abnormalities have been attributed to inbreeding. However, exposure to a variety of chemical compounds, especially those that have been identified as environmental endocrine disrupters (including mercury, p,p'-DDE, and polychlorinated biphenyls), has elicited all of the listed abnormalities in other species. A number of these contaminants are present in South Florida. An exposure pathway has been identified, and evidence presented in this paper, including the fact that there appears to be no significant difference between serum estradiol levels in males and females, suggests that many mate panthers may have been demasculinized and feminized as a result of either prenatal or postnatal exposure. Thus, regardless of the effects of inbreeding, current evidence seems to indicate that environmental contaminants may be a major factor contributing to reproductive impairment in the Florida panther population.