VMHvl-Projecting  Vglut1+ Neurons in the Posterior Amygdala Gate Territorial Aggression

2020 ◽  
Author(s):  
Xi Zha ◽  
Lei Wang ◽  
Zhuo-Lei Jiao ◽  
Rong-Rong Yang ◽  
Chun Xu ◽  
...  
Keyword(s):  
Territorial Aggression

India and Vietnam in the Indo-Pacific

2021 ◽  
pp. 097492842110049
Author(s):  
Sanjay Pulipaka ◽  
Libni Garg
Keyword(s):  
United States ◽  
Balance Of Power ◽  
The United States ◽  
International Order ◽  
Territorial Aggression ◽  
Nation States ◽  
Power Shift ◽  
Security Challenges ◽  
Common Position ◽  
Foreign Policy Strategies

The international order today is characterised by power shift and increasing multipolarity. Countries such as India and Vietnam are working to consolidate the evolving multipolarity in the Indo-Pacific. The article maps the convergences in the Indian and Vietnamese foreign policy strategies and in their approaches to the Indo-Pacific. Both countries confront similar security challenges, such as creeping territorial aggression. Further, India and Vietnam are collaborating with the United States and Japan to maintain a favourable balance of power in the Indo-Pacific. While Delhi and Hanoi agree on the need to reform the United Nations, there is still some distance to travel to find a common position on regional economic architectures. The India–Vietnam partnership demonstrates that nation-states will seek to define the structure of the international order and in this instance by increasing the intensity of multipolarity.

Vocal learning in Savannah sparrows: acoustic similarity to neighbours shapes song development and territorial aggression

2021 ◽  
Vol 176 ◽  
pp. 77-86
Author(s):  
Ian P. Thomas ◽  
Stéphanie M. Doucet ◽  
D. Ryan Norris ◽  
Amy E.M. Newman ◽  
Heather Williams ◽  
...  
Keyword(s):  
Vocal Learning ◽  
Acoustic Similarity ◽  
Territorial Aggression ◽  
Song Development ◽  
Savannah Sparrows

Charops and Roman Policy in Epirus

1945 ◽  
Vol 35 (1-2) ◽  
pp. 58-64 ◽  
Author(s):  
H. H. Scullard
Keyword(s):  
Point Of View ◽  
Territorial Aggression ◽  
The Third ◽  
Individual Point ◽  
The Difference ◽  
Of Greece

In the settlement of Greece after the Third Macedonian War Roman policy was at times moderate, at times harsh. On occasion the difference might represent only an individual point of view: thus the terms imposed upon Macedonia might seem generous to a Roman who contemplated the grant of ‘freedom’ to the Macedonians, the reduction of taxation and the absence of territorial aggression on Rome's part, while they might equally seem harsh to a Macedonian who felt that his sense of nationhood had been violated by Rome's creation of the four independent Republics. But towards Epirus Roman policy seems to have been marked by two successive stages, the first moderate, the second brutal. It is the purpose of this note to attempt to consider the causes which determined this change and to examine what influence the Epirote Charops exercised upon the measures which turned his country into a playground for Roman brutality and ultimately into an abomination of desolation.

Individual Variation in the Strength of Territory Defense in Male Song Sparrows: Correlates of Age, Territory Tenure, and Neighbor Aggressiveness

Behaviour ◽  
2004 ◽  
Vol 141 (1) ◽  
pp. 15-27 ◽  
Author(s):  
Jeremy Hyman ◽  
Melissa Hughes ◽  
Stephen Nowicki ◽  
William Searcy
Keyword(s):  
Individual Differences ◽  
Reproductive Success ◽  
Extrinsic Factors ◽  
Territory Defense ◽  
Intrinsic Factors ◽  
Territorial Aggression ◽  
Male Song ◽  
Song Sparrows ◽  
Territory Owner ◽  
Older Males

AbstractIn many species, the ability to defend a territory is essential for a male to obtain any reproductive success at all, and even among territorial individuals, variation in the strength of territory defense could have a significant impact on how much reproductive success is obtained. Previous studies have documented consistent individual differences in the vigor with which male song sparrows (Melospiza melodia) defend their territories, as measured by the strength of their reactions to territorial intrusions simulated through song playback. Variation in the strength of defense could reflect intrinsic differences among individuals in their resource holding potential (RHP), or variation in extrinsic factors. In this study, we examined whether variation in the strength of territory defense corresponds to differences in intrinsic factors such as the age or experience of the territory owner, the extrinsic factor of the level of aggression shown by neighbours, or both. Results indicate that males that previously held territories on the study site, regardless of whether they were holding the same territory as the previous year, show higher levels of territory defense than males that are new to the study site, and, assuming that returning males are older males, suggest that age is more important than experience on a specific territory in determining strength of territory defense. In addition, we found evidence that males with high levels of territorial aggression tend to be spatially clustered. The pattern observed suggests that a combination of intrinsic and extrinsic factors contribute to the expression of individual differences in territorial aggression.

scholarly journals Nesting strategy shapes territorial aggression but not testosterone: a comparative approach in female and male birds

2020 ◽  
Author(s):  
SE Lipshutz ◽  
KA Rosvall
Keyword(s):  
Tree Swallow ◽  
Comparative Approach ◽  
Female Competition ◽  
American Robin ◽  
Territorial Aggression ◽  
Physical Attack ◽  
Cavity Nesting ◽  
Comparative Framework ◽  
Underlying Mechanisms ◽  
Close Relatives

Our understanding of the proximate and ultimate mechanisms shaping competitive phenotypes primarily stems from research on male-male competition for mates, even though female-female competition is also widespread. Obligate secondary cavity-nesting has evolved repeatedly across avian lineages, providing a useful comparative context to explore how competition over limited nest cavities shapes aggression and its underlying mechanisms across species. Although evidence from one or another cavity-nesting species suggests that territorial aggression is adaptive in both females and males, this has not yet been tested in a comparative framework. We tested the hypothesis that cavity-nesting generates more robust territorial aggression, in comparison to close relatives with less restrictive nesting strategies. Our focal species were two obligate secondary cavity-nesting species and two related species with more flexible nesting strategies in the same avian family: tree swallow (Tachycineta bicolor) vs. barn swallow (Hirundo rustica); Eastern bluebird (Sialia sialis) vs. American robin (Turdus migratorius). We assayed conspecific territorial aggression, and found that cavity-nesting species physically attacked a simulated intruder more often than their close relatives. This pattern held for both females and males. Because territorial aggression is often associated with elevated testosterone, we also hypothesized that cavity-nesting species would exhibit higher testosterone levels in circulation. However, cavity-nesting species did not have higher testosterone in circulation for either sex, despite some correlative evidence that testosterone is associated with higher rates of physical attack in female tree swallows. Our focus on a competitive context that is relevant to both sexes – competition over essential breeding resources – provides a useful comparative framework for co-consideration of proximate and ultimate drivers of reproductive competition in females and males.

Market Power Politics

2021 ◽  
Author(s):  
Stephen E. Gent ◽  
Mark J.C. Crescenzi
Keyword(s):  
Natural Gas ◽  
Market Power ◽  
Global Market ◽  
Export Market ◽  
Power Politics ◽  
Territorial Aggression ◽  
Oil Export ◽  
Potential Benefits ◽  
Gas Market ◽  
Political Leverage

This book explores how market power competition between states can create disruptions in the global political economy and potentially lead to territorial aggression and war. When a state’s firms have the ability to set prices in a key commodity market like oil or natural gas, state leaders can benefit from increased revenue, stability, and political leverage. Given these potential benefits, states may be motivated to expand their territorial reach in order to gain or maintain such market power. This market power motivation can sometimes lead to war. However, when states are economically interdependent, they may be constrained from using force to achieve their market power goals. This can open up an opportunity for institutional settlements. However, in some cases, institutional rules and procedures can preclude states from reaching a settlement in line with their market power ambitions. When this happens, states may opt for strategic delay and try to gradually accumulate market power over time through salami tactics. To explore how these dynamics play out empirically, the authors examine three cases of market power competition in hard commodity markets: Iraq’s invasion and occupation of Kuwait to seize market power in the oil export market, Russia’s territorial encroachment into Georgia and Ukraine to preserve and expand its market power in the natural gas market, and China’s ongoing use of strategic delay and gray zone tactics in the South and East China Seas to maintain its dominant position in the global market for rare earth elements.

Sign in / Sign up

Export Citation Format

Share Document