Loggerhead sea turtle policies of the Barack Obama Administration (2009-2017) Loggerhead sea turtle policies of the Barack Obama Administration (2009-2017) The loggerhead sea turtle, is protected under the Endangered Species Act (ESA) of 1973. It was originally listed as a threatened species on July 28, 1978. The loggerhead turtle is the most prolific species of sea turtle in U.S. coastal waters. The loggerhead sea turtle ("Caretta caretta") is geographically distributed into nine distinct population segments(DPS). The National Marine Fisheries Service (NMFS), National Oceanic and Atmospheric Administration (NOAA), the U.S. Fish and Wildlife Services (USFWS), and the Department of the Interior ruled four DPSs as threatened and five DPSs as endangered
History of manifolds and varieties spaces with a differentiable or topological structure, while "variety" refers to spaces with an algebraic structure, as in algebraic varieties. In Romance languages, manifold is translated as "variety" – such spaces with a differentiable structure are literally translated as "analytic varieties", while spaces with an algebraic structure are called "algebraic varieties". Thus for example, the french word "" means topological manifold. In the same vein, the Japanese word "" (tayōtai) also encompasses both manifold and variety. ("" (tayō) means various.) Ancestral to the modern concept of a manifold were several important results of 18th and 19th century mathematics. The oldest