Histopathological changes in selenium-exposed fish

Redear sunfish (Lepomis microlophus) were collected from Martin Lake in east Texas. For at least 8 months, 1 year earlier, aqueous selenium-laden effluent from man-made sources was released into this 5,000-acre reservoir (unpublished data). Redear sunfish from a reference lake, 8 km upstream, were collected for comparison to Martin Lake fish. The hepatopancreas (i.e., liver and associated, disseminated exocrine pancrease), mesonephros (i.e., kidney), gonads, heart, spleen, stomach, and gill arches were preserved for histopathological examination using optical and/or transmission electron microscopy. Livers from Martin Lake redear sunfish (which had accumulated approximately 20 ppm selenium in the liver) showed central necrosis, reduced quantities of rough endoplasmic reticulum and glycogen particles, and increased numbers of lysosome-like structures. Kidneys showed proliferative glomerulonephritis, and exocrine pancreas showed marked hypertrophy at the optical level. Ultrastructurally, architectural disorganization, reduced rough endoplasmic reticulum, increased cisternal space, and proliferation of smooth endoplasmic reticulum were evident. The stomach, spleen, gill, heart, and gonads showed no abnormalities.     

The Future Is Uncentralized

In July 1995, ASPA's Endowment Board established the Donald C. Stone Fund to honor the memory of this public administration legend. Income from this fund is used to sponsor a lecture or symposium at ASPA's national conference which reflects Stone's varied interests and contributions to the field. This year marked the fifth Donald C. Stone Lecture. On April 4, Harlan Cleveland, former ASPA National President, was ASPA's Visions 2000 Stone Lecturer and gave the following speech.     

Fatal big cat attacks

Two cases of fatal attacks by large cats are presented. In the first case, a 30-year-old female zoo worker was attacked by a jaguar that had escaped its cage. In the second case, a 2-year-old girl was fatally injured by her father's pet leopard. The pattern of injuries in these cases is nearly identical to those of these cats' prey in the wild.     

New corporate Uyghur entrepreneurs in Urumqi,China

Although China's Uyghurs have progressively engaged in informal trade following economic reforms, in recent years a small group of corporate Uyghur entrepreneurs have positioned themselves in more formal industries where they hold a cultural advantage. However, we argue that the clustering of firms and a lack of experience and capital limits entrepreneurs' ability to compete with established Han businesses. This restricts Uyghur economic participation more generally, contributing to labour-market inequalities and ethnic tension in cities like Urumqi. The authors conclude that government support for Uyghur entrepreneurs is a crucial step to strengthen economic development and reduce ethnic tension in the region.