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  • About
  • 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.
1491

The plant ecology of a limestone grassland : competition and spatio-temporal dynamics

McLellan, Andrew John January 1995 (has links)
No description available.
1492

An ecological database of the British flora

Peat, Helen Jacqueline January 1992 (has links)
No description available.
1493

The landscape ecology of hedgerows with particular reference to island biogeography

Jones, Stephen Howard January 1992 (has links)
No description available.
1494

The ecology of the Chironomidae in a Phragmites reedbed at Cop Mere (Staffordshire, England)

Bell, P. G. January 1987 (has links)
No description available.
1495

A study of factors influencing consumer preference for certain beers with particular reference to flavour

Pierson, B. J. January 1980 (has links)
No description available.
1496

A study of the re-establishment of chalk grassland vegetation following arable cultivation

Booth, Karen Dawn January 1988 (has links)
No description available.
1497

Evaluation of various biomanipulations aimed at controlling freshwater pulmonate snails

Babiker, Ismail Elsheikh January 1993 (has links)
No description available.
1498

Behavioral ecology of carnivores

Gittleman, John L. January 1984 (has links)
No description available.
1499

The terrestrial ecology of the natterjack, Bufo calamita(Laurenti), and the common toad, Bufo bufo (Linnaeus)

Denton, Jonathan Simon January 1991 (has links)
No description available.
1500

Aspects of the ecology of the black-headed gull (Larus ridibundus) with comparative data on the common gull (L. canus)

MacKinnon, Gabriela Elisabeth January 1987 (has links)
Between 1982 and 1984, 893 Black-headed and 117 Common Gulls were trapped outside the breeding season in northeast England, and individually marked with wingtags or colour-rings. About 40% of marked adult Black-headed and Common Gulls returned to the study area in subsequent years, although adult Black-headed Gulls marked at the coast in the 1982-83 season returned in considerably higher proportions. Proportionately fewer second-year and first-year birds returned than adults. These percentages are considerably lower than the estimated annual survival rate for Black-headed Gulls, showing that some of the birds probably spent subsequent winters outside the study area. Some of the birds which did not return to the study area were recovered or seen elsewhere, mainly in eastern parts of Britain: few moved to the west coast. Foreign Black-headed Gulls which overwintered in the British Isles were most numerous compared to British birds in the south and east of the British Isles. A small proportion of Continental Black-headed Gulls remained in Britain during the breeding season: the consequences of these birds joining the British breeding population are discussed. Overwintering Black-headed Gulls in the study area were observed feeding inland on fields and refuse tips, and at the coast. First-years were uncommon compared to adults at the coast, less so on tips, and were relatively most common on fields. Females made up similar proportions of flocks at the coast and on inland fields, but were excluded to some extent from tips. Neither the survival rates of adult and ■ first-year British Black-headed Gulls, nor the weights of adult Black-headed Gulls caught in northeast England, were usually affected by the severity of weather in winter. The migrations and movements of Black-headed Gulls are discussed and compared to those of other species.

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