Territorial aggression influences fitness and, in monogamous pairs, the behavior of both individuals could impact reproductive success. Moreover, territorial aggression is particularly important in the context of interspecific competition. Tree swallows and eastern bluebirds are highly aggressive, secondary cavity-nesting birds that compete for limited nesting sites. We studied eastern bluebird...

Testosterone promotes aggressive behaviour in male vertebrates during the breeding season, but the importance of testosterone in female aggression remains unclear. Testosterone has both beneficial and detrimental effects on behaviour and physiology, prompting the hypothesis that selection favours an association between aggression and testosterone only in certain contexts in which intense or per...

The homologous neuropeptides vasotocin (VT) and vasopressin (VP) influence agonistic behaviours across many taxa, but peptide-behaviour relationships are complex and purportedly species-specific. Putative species-specific effects in songbirds are confounded with context, however, such that territorial species have been tested only in resident-intruder paradigms and gregarious species have been ...

The implications of insectsÕ vision for territorial defense have been relatively little studied in the Þeld. In the dragonßy Perithemis tenera Say we investigated whether either the angle at which an intruder was viewed by a territorial resident or the background against which it was viewed affected the detection of that intruder. Residents detected intruders at a greater distance if the intrud...

Patrícia Tavares Ribeiro Fundação Oswaldo Cruz. Escola Nacional de Saúde Pública. Departamento de Ciências Sociais. Rio de Janeiro, RJ, Brasil. Centro de Estudos Políticas e Informação sobre Determinantes Sociais da Saúde. Rio de Janeiro, RJ, Brasil. E-mail: [email protected] Territorial perspective, regionalization and networks: an approach to Federative Republic of Brazil’s health po...

This study examines the determination of Indonesia and Timor Leste land boundaries, especially in Noel Besi - Citrana segment. uses critical geopolitical analysis, vision according to Agnew (2013) O Tuathail (1996), explain issue boundaries – qualitative methods, which primary data is drawn from in-depth interviews with several key informants. The secondary through scientific literature news on...

The aim of this paper is to formulate a theoretical framework for the issue changes in administrative boundaries and systematize issues by selecting distinctive variants. Considering variety procedures forms boundary changes, case study conducted Poland. This analyzed provisions 271 decisions on granting city status from 2009–2022, which covered total 1887.8 km2. It was basis 31 variants eight ...

Immunization is a public health area in which the intergovernmental challenges of formulating a national policy are evident. It is also an area in which harmonization of policy across Canada is particularly critical. The National Immunization Strategy was a F/P/T initiative designed to achieve this policy goal. The combination of national guidelines and flexible federal funding via a trust has,...

BACKGROUND Besides their neuronal support functions, astrocytes are active partners in neuronal information processing. The typical territorial structure of astrocytes (the volume of neuropil occupied by a single astrocyte) is pivotal for many aspects of glia-neuron interactions. METHODS Individual astrocyte territorial volumes are measured by Golgi impregnation, and astrocyte densities are d...