A firm’s announcement that it intends to restructure based on tracking stock is usually associated with a significantly positive stock price reaction, at least in the short-run. Typically, this reaction has been attributed to expected reductions in a diversification discount, via reduced agency costs and/or reduced informational asymmetries. The existing literature has investigated this latter ...

Fisheries-induced evolution (FIE) has been reported for several intensively exploited fish stocks worldwide. Most studies focused on marine populations of high commercial interest , but FlE may also occur in intensively harvested fTesh water fish stocks. An example is the whitefish (Coregonus lavaretus) stock of Lake Constance. Previous evidence for FlE in this stock, tllrough tile analysis of ...

Heterotrophic picoplankton, including Bacteria and Archaea, form a major, often dominant component of the euphotic zone biomass throughout much of the world ocean. In Antarctic waters however, the bacterial biomass is a much smaller fraction of the total plankton stock, at least during the Austral summer. In the Ross Sea during the 1996-1997 growing season, bacterial abundance reached a peak of...

Grazing by phagotrophic flagellates and ciliates is a major source of mortality for bacterioplankton in both marine and freshwater systems. Recent studies have demonstrated a positive relationship between clearance rate and prey size for bacterivorous protists. We tested the idea that, by selectively grazing the larger (more actively growing or dividing) cells in a bacterial assemblage, protist...