42 research outputs found
Concentrations of organochlorine compounds (pesticides and PCBs), trace elements (Pb, Cd, Cu, and Hg), Cs-134, and Cs-137 in the livers of the European otter (Lutra lutra), great cormorant (Phalacrocorax carbo), and European catfish (Silurus glanis), collected from the Loire River (France)
In this study, liver samples of the European otter (Lutra lutra), great cormorant (Phalacrocorax carbo), and European catfish (Silurus glanis) from along the Loire River (France) were analyzed for organochlorine pesticides, polychlorinated biphenyls (PCBs), trace elements (lead, cadmium, copper, and mercury), Cs-134, and Cs-137. Organochlorine compounds were found in 100 % of the samples. Residue level of PCBs in these predators was the highest followed by DDTs and endosulfan, and maximal PCB values reached 1.61, 1.96, and 0.28 mg/kg wet weight for cormorants, otters, and catfish, respectively. DDTs, endosulfan, and lindane were the abundant pesticides in the livers of these predators. Concentrations of copper, lead, and cadmium in the livers of top predators were generally low; a potentially toxic level of lead was found in only one cormorant (34.9 mg/kg dry weight). Mean mercury concentrations in cormorant, otter, and catfish livers were 5.47, 4.68, and 2.71 mg/kg dry weight, respectively, and exceeded toxic thresholds for more than 40 % of the cormorants. Levels of organochlorine compounds and trace elements in these predators are generally below known toxic thresholds, but potential combined effects are not studied and warrant more investigations
Recommended from our members
Aux sources de la crise des Grands Lacs. Observatoire de l'Afrique centrale, 14 août 2000
Document collected by the University of Texas Libraries from the web-site of the Reseau Documentaire International Sur La Region Des Grands Lacs Africains (International Documentation Network on the Great African Lakes Region). The Reseau distributes "gray literature", non-published or limited distribution government or NGO documents regarding the Great Lakes area of central Africa including Rwanda, Burundi, and the Democratic Republic of Congo.UT Librarie
Enforcing Against Human Rights Violations in Internal Conflict
Moderator:
Scott L. Silliman, Executive Director, Center on Law, Ethics and National Security, Duke University School of Law
Overview:
Barbara Harff, Professor of Political Science, U.S. Naval Academy
Cambodia:
Rudy J. Rummel, Professor of Political Science, University of Hawaii and President, Haiku Institute of Peace Research
Rwanda & Burundi:
René Lemarchand, Regional Consultant on Issues of Governance and Democracy, USAID/REDSO
Liberia:
Honorable Edward Brynn, Principal Deputy Assistant Secretary, Bureau of African Affairs, Department of Stat