- About
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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 1 to 10 of 52 (0.047 seconds)| 1 |
The importance of socially transmitted information in the acquisition of novel foraging skills by pigeons and canariesPalameta, Boris January 1989 (has links)
No description available.
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Diets, energetics and ecology of the sea urchin Psammechinus miliarisOtero Villanueva, Maria del Mar January 2002 (has links)
No description available.
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Effects of variation in environmental calcium availibility on wild rodent populationsShore, Richard Francis January 1988 (has links)
No description available.
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Experimental studies in optimal foraging theoryCuthill, I. C. January 1985 (has links)
No description available.
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A model of resource renewal and depletionPossingham, Hugh Philip January 1987 (has links)
No description available.
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Age and sex differences in the foraging behaviour of lapwings (Vanellus vanellus) in mixed species flocksFutter, Keith January 1989 (has links)
No description available.
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Oviposition preference and larval performance in hoverfliesNamaghi, Hussein Sadeghi January 2000 (has links)
No description available.
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Age-related foraging behaviour in the black-headed gull (Larus ridibundus)Hesp, Lee January 1990 (has links)
No description available.
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Foraging behaviour and space use in the European badger (Meles meles L.)Shepherdson, D. J. January 1986 (has links)
No description available.
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Group size and foraging in stoneloach, Noemacheilus barbatulusStreet, Nigel E. January 1985 (has links)
The effects of group size on aspects of stoneloach foraging behaviour were examined in laboratory experiments. Fish were observed under dark conditions, using infra red illumination and video equipment. Experiments were timed to coincide with the stoneloach's natural time of maximum activity, immediately after a period of artificially simulated dusk. Individual stoneloach located a concealed food source more rapidly when group size was increased from one to five fish. Large quantitative differences were observed between fish, and those which were slow to locate food when alone remained poor when conspecifics were present. Over a 900 sec period, individuals in groups of five fish spent a greater proportion of available time searching, and appeared to sample the environment more, when compared with individuals in groups of only two. An increase in sampling may have counteracted the observed reduction in the number of feeding attempts by the fish in the larger groups, which resulted from the increased emphasis on searching. Groups of both six and twelve fish, foraging in tanks comprising two feeding areas each containing a patch, and a central area where no food was available, distributed themselves roughly in accordance with the predictions of an ideal free distribution when patches were equally profitable. When the patches differed in profitability in a ratio of either 2:1 or 5:1, the number of fish found in the low profitability area was as predicted. However, the number found in the high profitability area fell below that predicted, due to the presence of some individuals in the central area of the tanks. It is suggested that the latter individuals were found in the central area as a result of non-aggressive interference between individuals in the high profitability area. Finally, the marginal value theorem was used to predict the optimal patch residence time. The prediction was met in experimental tests at a group size of one, but at group sizes of two or five fish the observed time was significantly lower than that predicted.
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