Competition for Nesting Space among Peruvian Guano Birds

The Auk ◽  
1983 ◽  
Vol 100 (3) ◽  
pp. 680-688 ◽  
Author(s):  
David Cameron Duffy

Abstract In the mid-1940's, Peruvian managers greatly increased the nesting space available to the three principal surface-nesting species of the Peruvian Coastal Current: the Guanay Cormorant (Phalacrocorax bougainvillii), the Peruvian Booby (Sula variegata), and the Peruvian Brown Pelican (Pelecanus occidentalis thagus). The combined populations of these three species increased from 8 to 20 million birds. The annual rate of increase of the population rose from 8 to 18%. The three species appear to have evolved in the face of a shortage of nesting space. They have not diverged in their respective breeding seasons. Each species has habitat preferences for nesting, but the overlap is great. The booby and cormorant compete through a "scramble" to occupy space before it is settled by the other species. Neither can displace the other from nest sites. The pelican is dominant over the other two in aggressive interactions and frequently usurps their nests. Pelicans are apparently confined to nesting in level areas, whereas the other two species can nest on a greater range of gradients. Despite the facts that nesting space is limited and that its scarcity has a demonstrated effect upon the combined populations, interspecific competition for nesting space was difficult to document. Interspecific aggressive interactions were few and involved only a small percentage of the three populations. The individuals most affected by competition, those denied nesting space, were displaced from the area of competition and were thus less accessible for study.

The Auk ◽  
1983 ◽  
Vol 100 (4) ◽  
pp. 800-810 ◽  
Author(s):  
David Cameron Duffy

Abstract Most feeding by seabirds in the Peruvian Coastal Current, an upwelling of high productivity off the west coast of South America, takes place in groups. The major prey is an anchovy (Engraulis ringens), which occurs in large shoals and is exploited mainly by three species: the Peruvian Booby (Sula variegata), Peruvian Brown Pelican (Pelecanus occidentalis thagus), and Guanay Cormorant (Phalacrocorax bougainvillii). Other foraging situations have different species' compositions, and these appear to be related to the size, depth, and duration of availability of prey. Dominance interactions between species may be important in structuring flocks that are scavenging or feeding on plankton swarms. Interspecific piracy seems unimportant in flocks foraging on fish shoals. Certain species usually arrive first at new feeding situations. These species may be used as guides by other species or merely may be faster and thus reach food sources first. Studies of foraging of seabirds should be a valuable addition to the study of the distribution of birds at sea.


2010 ◽  
Vol 4 (1) ◽  
pp. 85-93
Author(s):  
Timothy Beal

This article reads between two recent explorations of the relationship between religion, chaos, and the monstrous: Catherine Keller’s Face of the Deep and Author's Religion and Its Monsters. Both are oriented toward the edge of chaos and order; both see the primordial and chaotic as generative; both pursue monstrous mythological figures as divine personifications of primordial chaos; both find a deep theological ambivalences in Christian and Jewish tradition with regard to the monstrous, chaotic divine; both are critical of theological and cultural tendencies to demonize chaos and the monstrous; and finally, both read the divine speech from the whirlwind in the book of Job as a revelation of divine chaos. But whereas one sees it as a call for laughter, a chaotic life-affirming laughter with Leviathan in the face of the deep, the other sees it as an incarnation of theological horror, leaving Job and the reader overwhelmed and out-monstered by God. Must it be one way or the other? Can laughter and horror coincide in the face of the deep?


2011 ◽  
Vol 5 (3) ◽  
pp. 265-291
Author(s):  
Manuel A. Vasquez ◽  
Anna L. Peterson

In this article, we explore the debates surrounding the proposed canonization of Archbishop Oscar Romero, an outspoken defender of human rights and the poor during the civil war in El Salvador, who was assassinated in March 1980 by paramilitary death squads while saying Mass. More specifically, we examine the tension between, on the one hand, local and popular understandings of Romero’s life and legacy and, on the other hand, transnational and institutional interpretations. We argue that the reluctance of the Vatican to advance Romero’s canonization process has to do with the need to domesticate and “privatize” his image. This depoliticization of Romero’s work and teachings is a part of a larger agenda of neo-Romanization, an attempt by the Holy See to redeploy a post-colonial and transnational Catholic regime in the face of the crisis of modernity and the advent of postmodern relativism. This redeployment is based on the control of local religious expressions, particularly those that advocate for a more participatory church, which have proliferated with contemporary globalization


2019 ◽  
Vol 54 ◽  
pp. 412-431
Author(s):  
Svetlana I. Skorokhodova

This article is devoted to the insufficiently known topic of the disease and death of Y. F. Samarin, a great Russian philosopher, ascetic and warrior, politician and scientist. On the basis of the extensive archival materials the author of the article presents the events panorama that allows to reconstruct certain fragments of Samarin’s life. According to the author, the strongest aspects of Samarin’s personality, supported by his belief in bodily resurrection, were revealed in the face of bodily affliction and death. His love for congenial people, relatives, and Russia dominated all the other feelings of the philosopher both during his life and at the time of his departure. The article shows that something mysterious and undisclosed still remains in Samarin s death.


Trictrac ◽  
2018 ◽  
Vol 10 ◽  
Author(s):  
Petru Adrian Danciu

Starting from the cry of the seraphim in Isaiahʹ s prophecy, this article aims to follow the rhythm of the sacred harmony, transcending the symbols of the angelic world and of the divine names, to get to the face to face meeting between man and God, just as the seraphim, reflecting their existence, stand face to face. The finality of the sacred harmony is that, during the search for God inside the human being, He reveals Himself, which is the reason for the affirmation of “I Am that I Am.” Through its hypnotic cyclicality, the profane temporality has its own musicality. Its purpose is to incubate the unsuspected potencies of the beings “caught” in the material world. Due to the fact that it belongs to the aeonic time, the divine music will exceed in harmony the mechanical musicality of profane time, dilating and temporarily cancelling it. Isaiah is witness to such revelation offering access to the heavenly concert. He is witness to divine harmonies produced by two divine singers, whose musical history is presented in our article. The seraphim accompanied the chosen people after their exodus from Egypt. The cultic use of the trumpet is related to the characteristics and behaviour of the seraphim. The seraphic music does not belong to the Creator, but its lyrics speak about the presence of the Creator in two realities, a spiritual and a material one. Only the transcendence of the divine names that are sung/cried affirms a unique reality: God. The chant-cry is a divine invocation with a double aim. On the one hand, the angels and the people affirm God’s presence and call His name and, on the other, the Creator affirms His presence through the angels or in man, the one who is His image and His likeness. The divine music does not only create, it is also a means of communion, implementing the relation of man to God and, thus, God’s connection with man. It is a relation in which both filiation and paternity disappear inside the harmony of the mutual recognition produced by music, a reality much older than Adam’s language.


Imbizo ◽  
2020 ◽  
Vol 11 (2) ◽  
Author(s):  
Naomi Epongse Nkealah ◽  
Olutoba Gboyega Oluwasuji

Ideas of nationalisms as masculine projects dominate literary texts by African male writers. The texts mirror the ways in which gender differentiation sanctions nationalist discourses and in turn how nationalist discourses reinforce gender hierarchies. This article draws on theoretical insights from the work of Anne McClintock and Elleke Boehmer to analyse two plays: Zintgraff and the Battle of Mankon by Bole Butake and Gilbert Doho and Hard Choice by Sunnie Ododo. The article argues that women are represented in these two plays as having an ambiguous relationship to nationalism. On the one hand, women are seen actively changing the face of politics in their societies, but on the other hand, the means by which they do so reduces them to stereotypes of their gender.


2020 ◽  
Author(s):  
Abimael Francisco do Nascimento

The general objective of this study is to analyze the postulate of the ethics of otherness as the first philosophy, presented by Emmanuel Levinas. It is a proposal that runs through Levinas' thinking from his theoretical foundations, to his philosophical criticism. Levinas' thought presents itself as a new thought, as a critique of ontology and transcendental philosophy. For him, the concern with knowledge and with being made the other to be forgotten, placing the other in totality. Levinas proposes the ethics of otherness as sensitivity to the other. The subject says here I am, making myself responsible for the other in an infinite way, in a transcendence without return to myself, becoming hostage to the other, as an irrefutable responsibility. The idea of the infinite, present in the face of the other, points to a responsibility whoever more assumes himself, the more one is responsible, until the substitution by other.


2018 ◽  
Vol 8 (4) ◽  
pp. 65-69
Author(s):  
Mao Nguyen Van ◽  
Dong Tran Nam

Background: Pigmented tumour of the skin is one of the common tumour in human including the benign pigmented tumours (more common) called Nevi tumours and the malignant one called melanoma which was less frequent but the most poor in prognosis. In addition, the others not belonging to these group had the same clinical appearance, so the application of histopathology and immunohistochemistry for the definitive diagnosis was indespensible. Objectives: 1. To describe the macroscopic features of the pigmented tumoral-like lesions; 2. To classify the histopathologic types of the pigmented cell tumours and the other pigmented tumours of the skin. Materials and Method: Cross-sectional research on 55 patients diagnosed as pigmented tumoral lesions by clinician, then all definitively diagnosed by histopathology combining the immunohistochemistry in difficult cases. Results: There was no difference in gender, the disease was discovered most common in adult, especially with the age over 51 years old (58.1%). the most region located was in the face accounting for 60%, following the trunk and limbs (14.6%, 12.8% respectively). All 3 malignant melanomas happened in foot. The most common color of the lesions was black (65.4%), the other ones were rose, grey and blue. Histopathology and immunohisthochemistry showed that the true pigmented cell tumours were 52.6% encompassing benign ones (Nevi tumour) (41.8%), melanoma (5.4%) and lentigo (5.4%). 47.4% was not the true pigmented cell tumour including pigmented basocellular carcinoma (36.4%) and the others less common as histiofibromas, acanthoma and papilloma. Conclusion: the pigmented tumoral-like lesions of the skin could be the true pigmented cell tumours and the others, so the application of the histopathology and the immunohistochemistry after the clinical discovery helps to determine and classify the disease definitely and for the best orientation of treatment as well. Key words: skin tumour, benign pigmented tumour (Nevi), malignant pigmented tumour (melanoma), pigmented basocellular carcinoma


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