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Average summer sheep population densities in ewe units/ha at 56 sites in Snowdonia in 1957-68 were 4.99-10.65 on herb-rich Agrostis tenuis/Festuca ovi...

Studies were carried out in Ghana on the population dynamics of larvae of Characoma stictigrapta Hmps., a pest of the pods and leaves of cacao. Larvae...

In recent decades, many of the common and widespread butterflies in Britain which do not already occupy the whole of the country have expanded in rang...

Stochastic analogues that included variation in spatial heterogeneity of population densities and of parameter values in Globodera were produced using...

A field experiment on lucerne in British Columbia in which populations of Acyrthosiphon pisum (Harris) were harvested at various rates is described an...

In investigations on Merodon equestris (F.) infesting daffodils in southern England in 1968-71, daily estimates of adult populations were made using a...

See also W.A. 20, 2439 and 2892. Experimental simulation of the theoretical effects of ploughing, both to different depths, and at different times of ...

A simulation model is described which demonstrates the role of parasitic Hymenoptera in influencing the numbers of the aphid Sitobion avenae on cereal...

Experiments were conducted (1) to determine whether resistance to MCPA would subside in a population of Ranunculus acris subsp. acris after ending a 3...

Habitat connectivity is a crucial determinant of population dynamics in fragmented landscapes. The corollary of the emphasis on maintaining connectivi...