On territorial behavior and other factors influencing habitat distribution in birds
TLDR
In this article, the Dickcissel sex ratio is employed as an indirect index of suitability and a sex ratio index was found to be correlated positively with density, consistent with the hypothesis that territorial behavior in males of this species limits their density.Abstract:
This example is provided so that non-theorists may see actual applications of the theory previously described. The Dickcissel sex ratio is employed as an indirect index of suitability. A sex ratio index was found to be correlated positively with density. This is consistent with the hypothesis that territorial behavior in the males of this species limits their density. This study provides a valid example of how the problem can be approached and offers a first step in the eventual identification of the role of territorial behavior in the habitat distribution of a common species.read more
Citations
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Incompletely Informed Shorebirds That Face a Digestive Constraint Maximize Net Energy Gain When Exploiting Patches
TL;DR: It is concluded that molluscivore red knots, in the face of a digestive constraint, are able to combine prior environmental knowledge about patch quality with patch sample information to obtain the highest possible net intake over total time.
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Habitat choice in breeding seabirds: when to cross the information barrier
TL;DR: The information barrier hypothesis is suggested: the presence of nesting birds may furnish cues about local breeding conditions that may deter dispersal to new habitat, even though good breeding sites may be available elsewhere.
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Plant responses to fertilization and exclusion of grazers on an arctic tundra heath
TL;DR: The use of functional growth forms for predicting the responses of nutrient enrichment and grazing must be questioned, as responses to fertilization as well as preferences by herbivores were shown to be species-specific rather than uniform within functional groups based on plant growth forms.
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Habitat selection and its effect on reproductive output in the herring gull in newfoundland
TL;DR: The results support the theoretical models for habitat selection and dispersion developed by Fretwell and Lucas (1970), which suggest that increasing density in a preferred habitat can create a situation whereby fitness may actually be greater in a less-preferred habitat.
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Ecological traps in isodars: effects of tallgrass prairie management on bird nest success
Eyal Shochat,Michael A. Patten,Douglas W. Morris,Dan L. Reinking,Donald H. Wolfe,Steve K. Sherrod +5 more
TL;DR: Isodar theory is a useful tool for detecting ecological traps if any component of fitness is measured in addition to animal densities and suggests that human modification of the environment may alter simultaneously food and predator abundance.
References
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Principles and Procedures of Statistics.
Book
Animal dispersion in relation to social behaviour
TL;DR: Wynne-Edwards has written this interesting and important book as a sequel to his earlier (1962) Animal Dispersion in Relation to Social Behaviour, and reviewing it has proven to be a valuable task for one who normally is only at the periphery of the group selection controversy.