Suchergebnisse

1 Predators and predation -- 2 Predation theory -- 3 Clearing the decks -- 4 Field studies -- 5 Self-limitation of prey and predator populations -- 6 Age and size structure in predator and prey populations -- 7 Prey refugia -- 8 The functional response: the influence of predatory behavior upon dynamics -- 9 Spatial structure in prey populations -- 10 Predation and population cycles -- 11 The evolution of predator-prey systems -- 12 Predation and the ecological community 140 -- Appendix of scientific names.

U.S. criminal justice policies have created the uniquely American style of mass incarceration. Since 1973, America has seen a sustained and substantial rise in its incarcerated population and the formation of a carceral state. Currently, the United States imprisons 2.23 million people, which amounts to 23% of the world's total incarcerated population. The most important takeaway is that the carceral state is an institution of predation, and predatory institutions create, maintain, and reproduce difference through the use of violence. I argue that the racial state is the predatory state, but the predatory state is not necessarily always the racial state. The predatory state is different from the racial state in that is applies violence toward various intersections of marginalization. This article contributes to the theoretical development of the concept of predation by its machinations through the institution of criminal justice. I discuss the predatory state, violence, and race. Next, I examine some of the ideas surrounding the collective knowledge, memory, and guilt, as well as the epistemologies, of race. Additionally, I discuss racial ignorance and selective knowing. Lastly, I offer Ferguson and Baltimore as case studies in the relationship between predation, identity, and violence as they affect criminal justice.

Still in early stages of development, conflict theory presents a growing interest in understanding the economic costs and benefits of conflicts. In this book, Mehrdad Vahabi analyses one type of conflict in particular: manhunting, or predation, in which a dominant power hunts down its prey and the goal of the prey is to escape and thus survive. This contrasts with traditional warfare, in which two (or more) powers enter into a conflict and the goal is to fight to win domination. The economics of escape casts light on costs and benefits of predatory activities, and explores the impact of violence as an impediment to developing countries with respect to assets structure. This book is unprecedented in its research and thought and develops a new theory of predation in economics that makes a significant contribution to the field

We analyze a game between citizens and governments, whose type (benevolent or predatory) is unknown to the public. Opportunistic governments mix between predation and restraint. As long as restraint is observed, political expectations improve, people enter the modern sector, and the economy grows. Once there is predation, the reputation of the government is ruined and the economy collapses. If citizens are unable to overthrow this government, the collapse is durable. Otherwise, a new government is drawn and the economy can rebound. Consistent with stylized facts, equilibrium political and economic histories are random, unstable, and exhibit long‐term divergence.

We propose a simple theory of predatory pricing, based on scale economies and sequential buyers (or markets). The entrant (or prey) needs to reach a critical scale to be successful. The incumbent (or predator) is ready to make losses on earlier buyers so as to deprive the prey of the scale it needs, thus making monopoly profits on later buyers. Several extensions are considered, including markets where scale economies exist because of demand externalities or two-sided market effects, and where markets are characterised by common costs. Conditions under which predation may take place in actual cases are also discussed.

The article analyzes the war against Mobutu (1996-97) and the more recent war (1998-) in the Democratic Republic of the Congo with particular attention to greed and grievance as motivating factors in these two wars. Whereas the authors' usage of the term 'greed' simply reflects the desire to gain control of natural resource rents, they model 'grievance' as deliberate institutional differences, implemented by the ruler, between the formal and informal sectors. On the basis of quantitative and qualitative evidence, the authors outline a model of a predatory conflict between a kleptocratic ruler and a group of potential predators within a given region. The potential predators choose between peaceful production and predation on the ruling elite, who control the country's natural resource rents. It is shown that institutional grievance between the formal and informal sectors, along with the relative strength of the ruler's defense, play a key role for the initiation of a war. This observation is used to explain the timing of the two wars analyzed in this article. The model also shows that once a war has commenced, the abundance of natural resources and the ruler's kleptocratic tendencies determine conflict intensity. This result is also well in line with experience from the most recent Congolese war.

Guira cuckoo (Guira guira) is a communal breeder bird species displaying a diversified diet. In this study, we report the first published predation event of a rodent by Guira cuckoo in Brazil. We searched for vertebrate predation by this bird species in Brazilian domains in the following databases: Google Scholar, SciELO, Scopus and Web of Science. We recorded the rodent predation event in a landscape composed of pasture and gallery forest in Campo Grande municipality, Mato Grosso do Sul, central-west Brazil. The predated rodent is a vesper mouse, Calomys sp. We found 19 vertebrate species predated by the Guira cuckoo, distributed in all Brazilian domains, within the orders: Anura (5 species), Passeriformes (1), Squamata (12), and Rodentia (1 - present study). Our result contributes to the natural history of the Guira cuckoo, and highlights that this cuckoo bird displays a generalist diet, feeding on a diversity of vertebrate species.