Implications of non-ideal occupancy for the measurement of territory quality

McGinn, Kate; Atuo, Fidelis A.; Jones, Gavin M.; Hobart, Brendan K.; Tempel, Douglas J.; Whitmore, Sheila A.; Berigan, William J.; Gutiérrez, R. J.; Peery, M. Zachariah

doi:10.1016/j.gecco.2022.e02097

Cited by 1 publication

(2 citation statements)

References 92 publications

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“…2a). This simple model corresponds to observations in many species, such as owls (McGinn et al 2022), gamebirds (Eason and Hannon 1994) and songbirds (Naguib et al 2004), and also agrees with the general common sense that individuals first interact with their immediate neighbors. The main reason why I expected some nontrivial effects to emerge from the above‐described simple movement heuristic is that some territories become effectively invisible to potential challengers, or at least less accessible than if there was no constraint on who can interact with whom (Fig.…”

Section: Introductionsupporting

confidence: 87%

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Reproductive skews of territorial species in heterogeneous landscapes

Péron

2022

Oikos

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The socio-spatial organization of populations of territorial species refers to the way distance, variation in social status and variation in resource availability interact to shape the way territory-bounded individuals are distributed. I investigated the resulting reproductive skew, i.e. the emergence of a few high performers amidst a majority of mediocre performers, using lifetime reproductive success data from 46 species living in contrasting landscape configurations. I applied three skew statistics that captured different aspects of the individual heterogeneity: the skewness, the Gini coefficient of inequalities and Hill's index of heavy-tailed distribution. I also used a simplistic theoretical model, in which only immediate neighbors interacted. In the comparative analysis, the distribution of lifetime reproductive success was more skewed but also more egalitarian in homogeneous than heterogeneous landscapes, after controlling for the allometric effect of the body mass. The simulations indicated that a possible explanatory mechanism for the change in egalitarian properties is that some individuals hide behind their neighbors in the socio-spatial organization. They therefore secure a better territory than if the distribution was despotic. The ideal despotic model without spatial restriction on interactions could not explain the correlations. This work emphasizes that the shape of the distribution of fitness components conveys information besides the mean and the variance, and the potential for nontrivial effects to emerge from simple movement heuristics.

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Section: Introductionsupporting

confidence: 87%

“…The main unrealistic aspect of the model is that in reality, territorial individuals are reluctant to change location once they have established precedence on a territory (Komdeur 1992, Eason and Hannon 1994, McGinn et al 2022). However, the model applicability is not seriously challenged for two reasons.…”

Section: Methodsmentioning

confidence: 99%

Reproductive skews of territorial species in heterogeneous landscapes

Péron

2022

Oikos

View full text Add to dashboard Cite

show abstract

Implications of non-ideal occupancy for the measurement of territory quality

Cited by 1 publication

References 92 publications

Reproductive skews of territorial species in heterogeneous landscapes

Reproductive skews of territorial species in heterogeneous landscapes

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