For the one year period considered, it is calculated that 683.5 g m‐2 plant litter entered the study area site. Of the six slugs studied, Arion intermedius Normand, the smallest species, had the highest overall consumption rate on the nine test foods (29.1 ± 0.9 mg dry wt g live wt‐1 d‐1) and the highest overall mean assimilation efficiency (72.0 + 0.9%). The mean faecal production for each of the six slug species was very similar, ranging from 8.4 to 9.9 mg dry wt g live wt‐1 d‐1. Using regression equations of food consumed on faeces produced, it is estimated that the slug fauna each year consumes 8.4% of the leaf litter input and 6.5% of the total available plant litter. Of the plant material consumed, 13.8 g dry wt m‐2 are deposited annually as faeces. The role of slugs in decomposition processes is discussed and compared with that of other soil organisms.
There have been few studies on the foods of Red deer (Cervus elaphus L.) and Roe deer (Capreolus capreolus L.) in British forests. Notable exceptions are the work of Prior (1968), Henry (1978) and Hosey (1981) on Roe deer. British work on the food of Red deer seems to have been confined to studies of animals on upland swards (Charles, McCowan & East, 1977; Staines ∓ Crisp, 1978). However, a more abundant supply of data on the food and feeding of both Red and Roe deer comes from the Continent (Dragoev, 1964; Gabuzov, 1960; Kolev, 1966; Novikov & Timofeeva, 1964; Siuda, Zorowski & Suida, 1969; Dzieciolowski, 1967a, b, 1969). Even so the data available were obtained from studies made on individual species of deer. This paper reports the results of an investigation into seasonal changes in the diet of Red and Roe deer coexisting in a conifer forest in the east of England.
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