By Robert J. Taylor (auth.)
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Wolfe and Allen (1973), Peterson (1976, 1979), Peterson and Allen (1974), Peterson and Page (in press). 2. These and many other examples of successful regulation of pests by predators and parasites can be found either in the encyclopedic volume by Clausen et al. (1977) or in a less-detailed but more accessible article by Caltagirone (1981). 3. There are several older studies which for various reasons yield ambiguous 46 Predation results and will not be discussed. See Edminster (1939), Robeson et ai.
I review here only two, the first by Connell (1970) and the second by Virnstein (1977). Connell studied populations of the barnacle, Balanus glandula, on the coast of Washington. Recruitment oflarval barnacles to the rocky shore varied little from year to year, but the only young barnacles to survive were those that settled high in the intertidal zone. To test the hypothesis that mortality in the lower intertidal came primarily from predation by drilling whelks of the genus Thais, Connell fastened stainless steel wire cages over small areas on a pier piling (Fig.
III pursuit of prey, 32 Predation approximately 600 (Fig. 2). Either the original estimate was too low, in which case Mech's estimate of the production of moose should have exceeded the rate of killing, or the original estimate was good and the wolves had failed to stop population growth. The latter is more likely (Mech and Jordan, personal communication). Subsequent studies by Wolfe and by Peterson have documented a surprisingly complex relationship between this predator and its prey.! Moose numbers peaked in 1967 at about 1500, only to collapse shortly thereafter to low densities throughout the 1970s.
Predation by Robert J. Taylor (auth.)