Feminization of Longnose Dace (Rhinichthys cataractae) in the Oldman River, Alberta, (Canada) Provides Evidence of Widespread Endocrine Disruption in an Agricultural Basin
المؤلفون المشاركون
Evans, Joyce S.
Ikonomou, Michael G.
Jackson, Leland J.
Habibi, Hamid R.
المصدر
العدد
المجلد 2012، العدد 2012 (31 ديسمبر/كانون الأول 2012)، ص ص. 1-11، 11ص.
الناشر
Hindawi Publishing Corporation
تاريخ النشر
2012-09-13
دولة النشر
مصر
عدد الصفحات
11
التخصصات الرئيسية
العلوم الطبيعية والحياتية (متداخلة التخصصات)
الأمراض
الملخص EN
We sampled an abundant, native minnow (Longnose dace—Rhinichthys cataractae) throughout the Oldman River, Alberta, to determine physiological responses and possible population level consequences from exposure to compounds with hormone-like activity.
Sex ratios varied between sites, were female-biased, and ranged from just over 50% to almost 90%.
Histological examination of gonads revealed that at the sites with >60% females in the adult population, there was up to 38% occurrence of intersex gonads in fish identified through visual examination of the gonads as male.
In the majority of intersex gonad cases, there was a large proportion (approx., 50%) of oocytes within the testicular tissue.
In male dace, vitellogenin mRNA expression generally increased with distance downstream.
We analyzed river water for 28 endocrine disrupting compounds from eight functional classes, most with confirmed estrogen-like activity, including synthetic estrogens and hormone therapy drugs characteristic of municipal wastewater effluent, plus natural hormones and veterinary pharmaceuticals characteristic of livestock production.
The spatial correlation between detected chemical residues and effects to dace physiology indicate that multiple land uses have a cumulative impact on dace in the Oldman River and effects range from altered gene regulation to severely female-biased sex ratios.
نمط استشهاد جمعية علماء النفس الأمريكية (APA)
Evans, Joyce S.& Jackson, Leland J.& Habibi, Hamid R.& Ikonomou, Michael G.. 2012. Feminization of Longnose Dace (Rhinichthys cataractae) in the Oldman River, Alberta, (Canada) Provides Evidence of Widespread Endocrine Disruption in an Agricultural Basin. Scientifica،Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-478390
نمط استشهاد الجمعية الأمريكية للغات الحديثة (MLA)
Evans, Joyce S.…[et al.]. Feminization of Longnose Dace (Rhinichthys cataractae) in the Oldman River, Alberta, (Canada) Provides Evidence of Widespread Endocrine Disruption in an Agricultural Basin. Scientifica No. 2012 (2012), pp.1-11.
https://search.emarefa.net/detail/BIM-478390
نمط استشهاد الجمعية الطبية الأمريكية (AMA)
Evans, Joyce S.& Jackson, Leland J.& Habibi, Hamid R.& Ikonomou, Michael G.. Feminization of Longnose Dace (Rhinichthys cataractae) in the Oldman River, Alberta, (Canada) Provides Evidence of Widespread Endocrine Disruption in an Agricultural Basin. Scientifica. 2012. Vol. 2012, no. 2012, pp.1-11.
https://search.emarefa.net/detail/BIM-478390
نوع البيانات
مقالات
لغة النص
الإنجليزية
الملاحظات
Includes bibliographical references
رقم السجل
BIM-478390
قاعدة معامل التأثير والاستشهادات المرجعية العربي "ارسيف Arcif"
أضخم قاعدة بيانات عربية للاستشهادات المرجعية للمجلات العلمية المحكمة الصادرة في العالم العربي
تقوم هذه الخدمة بالتحقق من التشابه أو الانتحال في الأبحاث والمقالات العلمية والأطروحات الجامعية والكتب والأبحاث باللغة العربية، وتحديد درجة التشابه أو أصالة الأعمال البحثية وحماية ملكيتها الفكرية. تعرف اكثر