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Territorial animals often respond less aggressively to neighbours than strangers. This ‘dear enemy’ effect is hypothesized to be adaptive by reducing unnecessary aggressive interactions with non-threatening individuals. A key prediction of this hypothesis, that individual fitness will be affected by variation in the speed and the extent to which individuals reduce their aggression towards neighbours relative to strangers, has never been tested. We used a series of song playbacks to measure the change in response of male great tits to a simulated establishment of a neighbour on an adjacent territory during early stages of breeding, as an assay of individuals’ tendencies to form dear enemy relationships. Males reduced their approach to the speaker and sang fewer songs on later playback repetitions. However, only some males exhibited dear enemy behaviour by responding more strongly to a subsequent stranger playback, and when the playback procedure was repeated on a subset of males, there was some indication for consistent differences among individuals in the expression of dear enemy behaviour. We monitored nests and analysed offspring paternity to determine male reproductive success. Individuals that exhibited dear enemy behaviour towards the simulated neighbour did not suffer any costs associated with loss of paternity, but there was also no evidence of reproductive benefits, and no net effect on reproductive fitness. The general ability to discriminate between neighbours and strangers is likely adaptive, but benefits are probably difficult to detect because of the indirect link between individual variation in dear enemy behaviour and reproductive fitness and because of the complex range of mechanisms affecting relations with territorial neighbours.Significance statementThe dear enemy effect, in which animals respond less aggressively to familiar neighbours compared to strangers, is probably beneficial because it reduces aggressive interactions with non-threatening individuals. However, no study has ever tested whether there actually are fitness benefits for individuals with a greater tendency to form dear enemy relationships. Our study used experimental playbacks to simulate neighbours and strangers, and we found no relationship between dear enemy behaviour and reproductive success in a songbird. However, our approach to test adaptive hypotheses of this widespread territorial behaviour and our longitudinal playback design to examine the development of familiarity towards a neighbour and discrimination of neighbours and strangers are likely to be important tools to advance our understanding of territorial behaviour and individual recognition.

Tourism impacts spatial changes in the urban neighbourhood, including Prawirotaman, which is experiencing a loss of social space. The community continues to strive for its social spaces in its private transitional space, namely the house yard and terrace. Hence, this study aims to explore the territorial behaviour of kampung residents amid the neighbourhood transformation. The study focuses on the formation and distribution of interaction spaces within kampung and the residents’ perception of the transitional space territoriality. This study was conducted qualitatively. The observations were conducted after afternoon prayer (Asr) and evening prayer (Maghrib). The data was collected from snapshots and using Global Positioning Systems (GPS), then imported into ArcGIS, and interviews were presented on emotion maps and narratives. The data were analysed with content and behaviour mapping approaches. This research found that territorial invasion can be defined as a local’s territorial behaviour for sustaining social space amid the kampung’s spatial transformation due to tourism. Hence, territoriality is not only related to the spatial modification to control a space. This research contributes to understanding architecture behaviour and policy making, especially in an urban village with tourism activities.

Herbivorous damselfish that cultivate algal farms frequently exhibit aggressive territorial behaviour to defend their investment from intruders, particularly against other herbivorous fish and invertebrates. On a coastal coral reef in New Caledonia, the response of the damselfish Hemiglyphidodon plagiometopon to intruders of varying type and level of threat to their algal farm was tested. Responses to live and dead coral fragments, carnivorous whelks, shells, and rocks varied from no response to biting and extrusion from farms. Damselfish elicited the strongest defensive response to the herbivorous sea urchin Echinometra mathaei, rapidly attacking the urchin by biting and lifting it from farms, before extruding it up to 3.5 m away. H. plagiometopon responded in a similar manner to dead urchins (no threat of herbivory) as to live urchins, but typically did not extrude them as far. Ultimately, damselfish responded to intruders in a manner largely consistent with the level of threat posed to their algal farm, with the similar response between live and dead urchins suggesting such strong defensive behaviours may be combination of ‘hard-wired’ and learned behaviours in reaction to the level of realised threat.

Multidimensionality, diversity, and multiplicity of changes occurring today at the level of territorial locations of various scales significantly actualise the resource component of the processes of life in the territories, since the positive dynamics of development of any socio-economic system is based on the provision of each stage with the necessary resources for development. It is even more significant for the territories with unbalanced development, since the lack of balance in the development of territories is often a consequence of violations in the resource provision of this process. All the above determines the relevance of the study of the capital of the territory with unbalanced development with the designation as the subject of the study of the need to form an appropriate interdisciplinary approach based on the optimal combination of theoretical and methodological components of the sciences that study the capital of the territory. The aim of the study is to summarize the components of the theoretical and methodological foundations of the interdisciplinary approach to the study of different types of territorial capital; to identify specific features of the theoretical and methodological components of the sciences that study different types of territorial capital; to identify common intersections and prospects of interdisciplinary tools, methods, formats in the study of territorial capital with imbalanced development. The methodological basis of the study will be a set of general and private scientific methods, the use of which allows to achieve the goal of the study. The expected results of the study are a conceptual framework that will in the future form a unified interdisciplinary theoretical and methodological approach to the study of capital of a territory with unbalanced development.

Love is one of our most powerful emotions, inspiring some of the greatest art, literature and conquests of human history. Although aspects of love are surely unique to our species, human romantic relationships are displays of a mating system characterized by pair bonding, likely built on ancient foundational neural mechanisms governing individual recognition, social reward, territorial behaviour and maternal nurturing. Studies in monogamous prairie voles and mice have revealed precise neural mechanisms regulating processes essential for the pair bond. Here, we discuss current viewpoints on the biology underlying pair bond formation, its maintenance and associated behaviours from neural and evolutionary perspectives.

An organism’s ability to disperse influences many fundamental processes, from speciation and geographical range expansion to community assembly. However, the patterns and underlying drivers of variation in dispersal across species remain unclear, partly because standardised estimates of dispersal ability are rarely available. Here we present a global dataset of avian hand-wing index (HWI), an estimate of wing shape widely adopted as a proxy for dispersal ability in birds. We show that HWI is correlated with geography and ecology across 10,338 (>99%) species, increasing at higher latitudes and with migration, and decreasing with territoriality. After controlling for these effects, the strongest predictor of HWI is temperature variability (seasonality), with secondary effects of diet and habitat type. Finally, we also show that HWI is a strong predictor of geographical range size. Our analyses reveal a prominent latitudinal gradient in HWI shaped by a combination of environmental and behavioural factors, and also provide a global index of avian dispersal ability for use in community ecology, macroecology, and macroevolution. In birds, the hand-wing index is a morphological trait that can be used as a proxy for flight efficiency. Here the authors examine variation of hand-wing index in over 10,000 bird species, finding that it is higher in migratory and non-territorial species, and lower in the tropics.

Sound production in fishes is vital to an array of behaviors including territorial defense, reproduction, and competitive feeding. Unfortunately, recent passive acoustic monitoring efforts are revealing the extent to which anthropogenic forces are altering aquatic soundscapes. Despite the importance of fish sounds, extensive endeavors to document them, and the anthropogenic threats they face, the field of fish bioacoustics has been historically constrained by the lack of an easily accessible and comprehensive inventory of known soniferous fishes, as is available for other taxa. To create such an inventory while simultaneously assessing the geographic and taxonomic prevalence of soniferous fish diversity, we extracted information from 834 references from the years 1874–2020 to determine that 989 fish species from 133 families and 33 orders have been shown to produce active (i.e., intentional) sounds. Active fish sound production is geographically and taxonomically widespread—though not homogenous—among fishes, contributing a cacophony of biological sounds to the prevailing soundscape globally. Our inventory supports previous findings on the prevalence of actively soniferous fishes, while allowing novel species-level assessments of their distribution among regions and taxa. Furthermore, we evaluate commercial and management applications with passive acoustic monitoring, highlight the underrepresentation of research on passive (i.e., incidental) fish sounds in the literature, and quantify the limitations of current methodologies employed to examine fishes for sound production. Collectively, our review expands on previous studies while providing the foundation needed to examine the 96% of fish species that still lack published examinations of sound production.

Olfactory signalling is widespread among mammal inter- and intra-specific communication systems. Social mammals use latrines (faecal accumulations) as a communication system, which address the needs of individuals both inside and outside the social group. Latrines are commonly used as olfactory and visual signals for the delimitation of territories, and the location of these signals may thus provide useful clues for the study of the marking animals’ behaviour and the delimitation of a spatial framework for these studies. In this work, we have tested the application of indigestible faecal markers in order to define territorial boundaries marked by latrines in wild rabbit social groups. Different combinations of baits and markers were first tested on wild rabbits kept in captive conditions, and the best combinations were then applied to rabbits in semi-natural conditions in order to test their feasibility for use with wild populations. As one possible application of the method, Minimum Convex Polygons and Kernel density estimators were used to analyse the distribution of the latrines of three wild rabbit social groups in semi-natural conditions. The results of this showed that the marked bait method is a useful tool for exploring the territorial behaviour of social mammals that use latrines for communication. It can also provide useful information for the definition of spatial frameworks based on social structures, and is fast, straightforward, easy, cheap, and does not require specialised training.

The odonates are insects that have a wide range of reproductive, ritualized territorial, and aggressive behaviors. Changes in behavior are the first response of most odonate species to environmental alterations. In this context, the primary objective of the present study was to assess the effects of environmental alterations resulting from shifts in land use on different aspects of the behavioral diversity of adult odonates. Fieldwork was conducted at 92 low-order streams in two different regions of the Brazilian Amazon. To address our main objective, we measured 29 abiotic variables at each stream, together with five morphological and five behavioral traits of the resident odonates. The results indicate a loss of behaviors at sites impacted by anthropogenic changes, as well as variation in some morphological/behavioral traits under specific environmental conditions. We highlight the importance of considering behavioral traits in the development of conservation strategies, given that species with a unique behavioral repertoire may suffer specific types of extinction pressure.

This article analyzes the influence of input data on the process of implementation of integrated territorial development in the Arctic conditions. The study is based on the analysis of data obtained from various sources such as statistical reports, geographical maps, sociological surveys and others. This study examines the factors affecting the construction processes of complex territorial development, in particular, the application of work organization project in the Arctic conditions. The implementation of the project and factors affecting the project implementation are also analyzed. The results of the study make it possible to identify the key factors affecting the success of territory development programs in the Arctic conditions and offer recommendations to improve the quality of input data used in the planning and implementation of integrated territory development projects. Based on the results obtained, the interrelationships of technological processes by various parameters are revealed, which in turn will allow us to determine the presence and levels of influence of the assumed factors on the changes in the implementation of the processes of integrated territorial development in the Arctic conditions.