Ecological Implications of Resource Depression

An Introduction to the Biocomplexity of Sanak Island, Western Gulf of Alaska

“…First, it appears that humans were not overexploiting sea lions in the past, at least on Sanak Island. If they were, declines in otariids should be associated with an increase in the number of predators (humans), the hallmark of a classic exploitation depression (Charnov et al 1976). The exact opposite is evident here.…”

“…In fact, the graph suggests that during times of warmer and less-productive climatic regimes, otariids experienced a form of resource depression, likely a classic ecological depression (e.g., Charnov et al 1976). In general the two AIs correspond well, although the otariid-sea otter AI appears to correspond more favorably with the climatic model (Table 1), especially after the post-Neoglacial period ca.…”

Optimality Analyses of Operant Behavior and Their Relation to Optimal Foraging

“…T'hird, lor a given searclt tinre, r, the optirnal choice depends orr the relative, ratlrer than tlre absolute, abundattce of tlre rnore abunclant prey type. as slrr<lents of predator "switching" I)ave proposed (e.g., Murdoch & Oaten, 1975 (charnov, 1976;parker & Stuart, 1976). 'Ihe condition unclcr whiclr tlre two are the same is illustrated in Figure 4.…”

Wolf Use of Summer Territory in Northeastern Minnesota

“…Jedrzejewski et al (2001) concluded that rotational use is related to territory maintenance but may also help wolves to avoid prey behavioral depression. Charnov et al (1976) termed behavioral depression of prey availability to describe a heightened awareness of prey in response to presence of predators, which is thought to lower hunting success of predators.…”