U the morning of February 26, 2010, the name Eddie Roach meant nothing to me. Then a desperate e-mail brought the 32-year-old self-described “global health missionary” into my life. Weeks earlier, Roach had been distributing handheld water purifiers in rural Uganda; now, according to his friend’s SOS, he was in a Nevada intensive care unit awaiting dialysis and exchange transfusion. Diagnosis? ...

Recruitment success of roach varied dramatically between 1979 and 1982 in Alderfen Broad, a small lake in eastern England. When fry were abundant (in 1979 and 198 1, but not in 1980 or 1982) the summer zooplankton became sparse and was dominated by copepods and rotifers. In years of good recruitment, as each of the preferred cladoceran prey species entered the diet of underyearling roach, its d...

Disruption in gonadal development of wild roach living in U.K. rivers receiving large volumes of treated sewage effluent is manifest in a variety of ways, ranging from malformation of the germ cells and/or reproductive ducts to altered gamete production. Intersex fish were also found to have an altered endocrine status and an elevated concentration of plasma vitellogenin. Gonadal growth was inh...

905. [5] Chapman M. G. and Tanaka K. L. (2002) JGR, 106, 10,087-10,100. Abstract #1402. [6] Rossi A. P. et al. (2008) JGR, 113. [7] Sowe M. et al. (2008) EPSC III, Abstract #510. [8] Roach L. H. et al. (2008) LPSCXXXIX,510. [8] Roach L. H. et al. (2008) LPSCXXXIX, Abstract #1823. [9] Vaniman D. T. et al. (2004), Nature,1823. [9] Vaniman D. T. et al. (2004), Nature,

The intention to increase roach (Rutilus rutilus) consumption is in focus for ecological and economic reasons in Finland. However, its safety as food has not been considered comprehensively. We collected and artificially digested 85 roach halves originating from the south-eastern coast of Finland, and found trematode metacercariae in 98.8% of the samples. Based on polymerase chain reaction (PCR...

According to the immunocompetence handicap hypothesis, males with attractive sexual ornamentation are more handicapped than their less ornamented rivals because of the immunosuppressive androgens required for the production of secondary sexual characters. Here we studied the predictions of the hypothesis in a wild cyprinid fish, the roach (Rutilus rutilus). We assayed (1) sexual ornamentation (...

In this paper we study the topology of the configuration space of a device with d legs (alias ’roach’) such that at most k of them are allowed to be off the ground. We suggest control strategies providing that this roach moves stably forward starting from a ’maximal’ subset of admissible initial positions of legs. The meaning of the term ’maximal’ will be explained below. Advantages of the sugg...

Environmental change may affect predator-prey interactions in lakes through deterioration of visual conditions affecting foraging success of visually oriented predators. Environmental change in lakes includes an increase in humic matter causing browner water and reduced visibility, affecting the behavioural performance of both piscivores and prey. We studied diurnal patterns of prey selection i...