...Eric von Elert; Anja Zitt; Anke Schwarzenberger SUMMARY Daphnia has been shown to acquire tolerance to cyanobacterial toxins within an animals' lifetime and to transfer this tolerance to the next generation. Here we used a strain of the cyanobacterium Microcystis aeruginosa , which contained two...

...Peter Alpert SUMMARY Drying to equilibrium with the air kills nearly all animals and flowering plants, including livestock and crops. This makes drought a key ecological problem for terrestrial life and a major cause of human famine. However, the ability to tolerate complete desiccation...

... expression in the central nervous system, its action as a growth factor with non-haematopoietic functions and its potential clinical relevance in various brain pathologies. hypoxia ischaemia neuroprotection angiogenesis VEGF preconditioning tolerance It has been almost a century since Carnot...

.... Salinity tolerance varies during development, with 50 % lethal salinities (LS 50 ) ranging from approximately 15–17 ‰ in larvae to approximately 12 ‰ in postlarvae and 10 ‰ in adults. Larval and adult lobsters can avoid low-salinity areas using behavioural strategies. When exposed to low salinity...

... insects (such as flies or cockroaches), nanogram doses of the toxin induce a rapid paralysis within seconds. More tolerant insects respond to microgram doses by developing either a slow progressive paralysis, as in lepidopterous larvae, or a rapid but reversible paralysis, as in Trachyderma philistina...

... l -1 (as total Zn), experimental fish were resistant to challenge. However, the fish did not acquire increased survival tolerance (LT 50 ) to a lethal concentration of Zn 2+ (4 mg l -1 =61 μ mol l -1 as total Zn). 8 9 1994 © The Company of Biologists Limited 1995 fish rainbow...

... 2+ influx because K m values (38–230 µ mol l -1 ), even when elevated by Zn 2+ , remained below the water [Ca 2+ ] (1000 µ mol l -1 ). Rainbow trout exposed to Zn 2+ exhibited a slower rate of protein synthesis in the gills (measured on day 23) and an increased tolerance to Zn 2+ challenge (measured...