Spatial variation in cone serotiny in Rocky Mountain lodgepole pine (Pinus contorta ssp. latifolia) across Yellowstone National Park influences initial pine recruitment after stand-replacing fire with tremendous population, community, and ecosystem consequences. A previous study showed that much of the spatial variation in serotiny results from the balance of selection arising from high frequen...

My cat is learning to catch squirrels in the back garden. It’s a painfully slow process. He seems to be trying every available technique, improving step by step. He’s tried sitting near the house and charging down the garden when a squirrel appeared, only for the squirrel to spot him and dash off. He’s tried assaulting the squirrel when it came down the tree, only to find out that squirrels cli...

1. Visual responses were recorded from neurones in the magnocellular and parvocellular layers of the lateral geniculate nucleus (LGN) of the thalamus in two species of New World monkeys - the diurnal squirrel monkey (Saimiri sciureus) and the nocturnal owl monkey (Aotus trivirgatis). Recording sites were reconstructed in postmortem tissue and comparisons were made between the response propertie...

The roles that diet and prey abundance play in habitat selection of Canada lynx (Lynx canadensis) in the contiguous United States is poorly understood. From 1998–2002, we back-tracked radiocollared lynx (6 F, 9 M) for a distance of 582 km and we located 86 kills in northwestern Montana, USA. Lynx preyed on 7 species that included blue grouse (Dendragapus obscurus), spruce grouse (Canachites can...

Unlike individually distinctive territorial calls, contact calls, or calls that aid in the recognition of young by their parents, the function or functions of individually distinctive alarm calls (vocalizations produced in response to predators) is not immediately apparent. Yellow-bellied marmots, Marmota flaviventris, grounddwelling sciurid rodents, produce individually distinctive alarm calls...

In this paper, we propose an off-the-grid compressive sensing based method to detect brokenbar fault in squirrel-cage induction motors. To validate our method, we first build a dynamic model of squirrel-cage induction motor using multi-loop equivalent circuit to simulate motor current under fault conditions. We then develop an off-the-grid compressive sensing algorithm to extract the fault char...

Alarm calls alert receivers to the presence and/or nature of a predatory threat. Studies of alarm communication in Richardson’s ground squirrels (Spermophilus richardsonii) have focused on juvenile signalers and receivers; however, adult and juvenile receivers may tailor their response to alarm calls based on different underlying signal parameters and attend differentially to alarm calls broadc...

It has been estimated that the optimal yield of red hake, Urophycis chuss (also called squirrel hake, mud hake, and ling), is 32,000 metric tons (t). This is an increase from the 1978 optimal yield estimate which was 16,000 t. The international catch of this fish from Georges Bank in 1977 was 2,879 t with the U.S. commercial catch being just 96 t. Thus, there is an abundant resource of this spe...

in German .............................................................................................29 Publications #1 and #2