Nest location, clutch size and nest success in the Scarlet Ibis Eudocimus ruber

Breeding success and nest-site characteristics were studied during the 1996-1997 breeding season in a colony of Scarlet Ibises Eudocimus ruber in south-eastern Brazil to test the hypothesis that nest-site characteristics and clutch size affect nest success. Two nesting pulses produced young, the earlier being more successful. Predation accounted for most failures during the first pulse, wind destruction during the second. A third pulse with few nests produced no young. Adult Ibises abandoned nests when they lost sight of other incubating birds. Logistic regression analysis indicated that nest success during the first pulse was positively related to clutch size, number of nests in the nest tree and in the nearest tree, and negatively to the distance to the nearest neighbour. During the second pulse there were significant negative associations between success, nest height and distance to the fourth nearest nest, and a positive association between success and nest cover. The results agree with the 'selfish herd' hypothesis, indicating that nest aggregation may increase breeding success, but the nest-site characteristics affecting success can differ over the course of one breeding season.

Breeding biology and nest site characteristics of the scarlet ibis in southeastern Brazil

The breeding biology of the only Scarlet Ibis Eudocimus ruber colony in southeastern Brazil was studied during the 1996-97 breeding season. The ibises began to visit their colony site by mid-September. Nest building and egg laying took place in early November and was synchronous, making the first nesting pulse. Mean clutch size in this pulse was 2.45 eggs/nest, and 0.67 young/nest reached age three weeks, when they were able to walk about the nest tree and environs. Predation was the main cause of nest failures (74% of all losses), followed by nest collapses (19%). A second nesting pulse, also synchronous, started in late December, when the young from the first nests were already able to wander about the colony and make short flights. Mean clutch size of this pulse was 2.05 eggs/nest and productivity was 0.34 young/nest. Nest collapses during storms accounted for 58% of the losses, and predation for a further 27%. A third pulse, with only a few nests, started when the second pulse young were in their third week, but no nest was successful. The incubation time was 21-24 days, and the young were able to fly well when 40 days old, deserting the colony by age 75 days. Nesting early in the breeding season yielded greater success. Nests were built close to each other (a sphere with a 1.8 m radius and centered on an average nest would include the four nearest neighbors) and there was always more than one nest per tree. Most nests were built on the upper third of the nest-tree and had some cover from overhanging branches. There was a trend for the ibises building their nests in even closer proximity during the second pulse, perhaps as a strategy to lessen individual predation risks. Received 30 August 2000, accepted 4 October 2000.

Breeding season diet of Scarlet Ibises and Little Blue Herons in a Brazilian mangrove swamp

We studied the diet composition and overlap of Scarlet Ibises (Eudocimus ruber) and Little Blue Herons (Egretta caerulea in a mangrove swamp in southeast Brazil during the 1996-1997 breeding season, which occurs during the rainiest period. Crabs comprised 95% of all prey taken by the ibises and 80% of the prey of the herons, Nevertheless, diet overlap was small (similar to 30%) due to ibises feeding mostly on Uca spp. and Eurythium limosum crabs, which were taken from their burrows; the herons fed on the arboreal and semi-arboreal Aratus Pisonii and Metasesarma rubripes crabs. Divergent hunting strategies of ibises (tactile foragers) and herons visually-oriented predators) explains the diet segregation when preying on an ecologically diverse crab guild, but it is unclear why herons prey rarely on fiddler crabs. Scarlet Ibises bred successfully while feeding oil estuarine organisms living in low salinities in the mangroves, showing that mangroves may be adequate foraging habitats for chick-rearing ibises during periods of low salinity.

Modellierung und empirische Analyse von Preismechanismen im Hochfrequenzbereich : eine Analyse am Beispiel der elektronischen Aktienmärkte IBIS und XETRA

Magdeburg, Univ., Fak. für Wirtschaftswiss., Diss., 2010

Modellierung und empirische Analyse von Preismechanismen im Hochfrequenzbereich : eine Analyse am Beispiel der elektronischen Aktienmärkte IBIS und XETRA

Magdeburg, Univ., Fak. für Wirtschaftswiss., Diss., 2010

Modellierung und empirische Analyse von Preismechanismen im Hochfrequenzbereich : eine Analyse am Beispiel der elektronischen Aktienmärkte IBIS und XETRA

Magdeburg, Univ., Fak. für Wirtschaftswiss., Diss., 2010

Tetrameres (Tetrameres) spirospiculum n. sp. (Nematoda, Tetrameridae) from the Buff-necked Ibis, Theristicus caudatus caudatus (Boddaert) (Aves, Threskiornithidae)

Tetrameres (T.) spirospiculum n. sp. is proposed, taking into account the very unusual aspect of the longer spicule, which is slender and progressively spiralled from its middle, towards the distal end, that promptly distinguishes it from all the species of the genus.

[Voyage en Italie : 1824-1830]. , [Détails de peintures décoratives] : [neuf motifs dont terme, antilope, ibis, architectures feintes] : [dessin] / [Henri Labrouste]

Référence bibliographique : Weigert, 427

Brock Scarlet

The 'Brock Scarlet' Windbreaker with big blue Brock 'B' was awarded to male athletes representing Brock who were either a part of intercollegiate competition for two years or had won a championship in their first year. This particular jacket dates back to 1968.

Entre a cidade e a floresta: dissidência e anuência em The Scarlet Letter

Este artigo propõe uma leitura do romance The Scarlet Letter, de Nathaniel Hawthorne, enquanto viagem pelo espaço físico e ideológico norte-americano, através de uma análise dos diferentes momentos do percurso da letra A bordada por Hester Prynne. Movendo-se entre a cidade e a floresta, a personagem assume a sua individualidade e o desejo de afastamento da América puritana, mas, simultaneamente, ao longo da narrativa, percebe-se que a sua rebeldia é diluída num espírito comunitário e ideológico e que a letra A acaba por assumir aquele que provavelmente será o seu maior significado – a América. Esta leitura será feita juntamente com a análise dos artigos: “How the Puritans won the American Revolution” e “The Rites of Assent: Rhetoric, Ritual and the Ideology of American Consensus”, de Sacvan Bercovitch.