Herbivore Diet Selectivity and Its Influence over Ecosystem Recycling in Wrangel Island

Шереметьев, И. С.; Rosenfeld, Sebastián; Baranyuk, Vasily V.

doi:10.1134/s1995425521020104

Cited by 4 publications

(1 citation statement)

References 31 publications

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“…Many studies estimate selectivity without investigating preference switching, for example, Agrela et al (2002), Cohen and Beckley (2021), Lee et al (2018), Popp et al (2018), and Sheremetev et al (2021). In the case of two prey (forage, or host) items, this is equivalent to fitting the general preference model (with

b = 1

), and calculating Chesson's

α

from the estimated preference parameter,

c

\overset{α}{true} = \overset{c}{true} / ((), \overset{c}{true} + 1)

(Chesson, 1978).…”

Section: Discussionmentioning

confidence: 99%

Addressing a potential weakness in indices of predation, herbivory, and parasitism

Adams

2023

Population Ecology

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Quantification of predation, herbivory, and parasitism is critical to understanding the dynamics and trophic interactions of populations in an ecosystem. Such quantification can be challenging if the availability or consumption of the taxa are difficult to assess. Sometimes the consumption of a single prey, forage, or host is used as an overall index of the predation, herbivory, or parasitism for a population of interest. Occasionally, human‐manipulated baits are used to derive similar indices. However, all such indices are susceptible to influence by variation in the abundance of the preferred taxon relative to other taxa as the result of preference switching. In this article, I describe a test for preference switching (and an adjustment, if detected) that does not require availability and consumption of the prey (forage, or host) to be measured on the same scale. The ability to detect and adjust for preference switching in such situations may advance the understanding of biological preference in taxa not previously studied in this respect.

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