Peter Waldeck

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Conspecific brood parasitism (CBP), an alternative reproductive tactic where some females lay eggs in the nests of other females of the same species, occurs in many animals with egg care. It is particularly common in waterfowl, for reasons that are debated. Many waterfowl females nest near their birthplace, making it likely that some local females are(More)
Previous attempts to manipulate oil synthesis in plants have mainly concentrated on the genes involved in the biosynthesis and use of fatty acids, neglecting the possible role of glycerol-3-phosphate supply on the rate of triacylglycerol synthesis. In this study, a yeast gene coding for cytosolic glycerol-3-phosphate dehydrogenase (gpd1) was expressed in(More)
The aim of this study was to investigate whether endogenous restrictions in oxygen supply are limiting for storage metabolism in developing oilseed rape (Brassica napus) seeds. Siliques were studied 30 d after flowering, when rapid lipid accumulation is occurring in the seeds. (a). By using microsensors, oxygen concentrations were measured within seeds and(More)
Parental defence against predators may increase offspring survival but entail other costs. Egg predation is frequent early in the laying sequence of the common eider, which differs in this and in several other ways from most other waterfowl. We test the hypothesis that permanent presence at the nest from the second or third egg is an adaptation for reducing(More)
Kin selection is a powerful tool for understanding cooperation among individuals, yet its role as the sole explanation of cooperative societies has recently been challenged on empirical grounds. These studies suggest that direct benefits of cooperation are often overlooked, and that partner choice may be a widespread mechanism of cooperation. Female eider(More)
Conspecific brood parasitism (CBP), females laying eggs in the nest of other 'host' females of the same species, is a common alternative reproductive tactic among birds. For hosts there are likely costs of incubating and rearing foreign offspring, but costs may be low in species with precocial chicks such as waterfowl, among which CBP is common. Waterfowl(More)
Finite Impulse Response (FIR) filtering and Least Mean Squares (LMSI adaptive filtering algorithms have been implemented in both hardware and sofnvare on a MicroblaEe processor configured in a Virrer II, runnirig aClinxr. These implementarions have been ewluared in terms of currenr usage (both idle and active). area usage (for hardware-assisted(More)
The new technology of reconfigurable System-on-Chip is shown to be a good match to the requirements of realtime embedded systems. In particular, the judicious use of specialised data processing peripherals can reduce the CPU load significantly and greatly ease the task of guaranteeing that real-time deadlines are met in complex multi-processing real-time(More)