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  • About
  • The Global ETD Search service is a free service for researchers to find electronic theses and dissertations. This service is provided by the Networked Digital Library of Theses and Dissertations.
    Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
1

Ecology and conservation of the swift parrot : an endangered austral migrant /

Saunders, Debra L. January 2008 (has links)
Thesis (Ph.D.) -- Australian National University, 2008.
2

Insights on Psittacine Nutrition through the Study of Free-living Chicks

Cornejo, Juan 2012 May 1900 (has links)
The Psittacidae is one of the most endangered families of birds in the world. Knowledge of its nutrition is important for understanding their survival and productivity in the wild, as well as for their adequate husbandry in captivity. Hand-rearing is a common practice for this group. However, research on their requirements is limited. Analysis of the crop content of chicks can provide new insights into psittacine nutrition, but it is limited by the small sizes of samples which can be obtained. We sampled the crops from free-living chicks of scarlet macaws and red-and-green macaws from southeastern Peru, Cuban parrots from the Bahamas, lilac-crowned parrots from northwestern Mexico, and thick-billed parrots from northern Mexico. The predicted metabolizable energy, protein, fat, minerals, profile of essential amino acids and profile of fatty acids of the crop samples, as well as from 15 commercial hand-rearing formulas, were analyzed and contrasted. Near Infrared Spectroscopy was shown to be a valid technique for the nondestructive, low cost prediction of a variety of nutritional attributes of crop samples as small as 0.5 g dry weight, expanding the possibilities of wild animal nutrition research. The diets of the five studied species presented remarkable similarities and common patterns. The predicted dietary metabolizable energy and fat concentrations were particularly similar among species, the thick-billed parrot being the one with the most unique nutrient profile. The fatty acid profile of the crop contents differed markedly among genera, with the thick-billed parrot closer to the macaws than to the parrots. In comparison with the crop samples, the hand feeding formulas presented lower fat, Mg, arginine, and valine concentrations. The wide variation in nutrients suggests that there is not yet a consensus among manufacturers concerning the correct nutrition for growing psittacines. It is suggested that a single formulation could be used to hand-rear macaws and parrots from half its nesting time to fledging, and further research should focus on their nutrition during the first half. Our results suggest that manufacturers should evaluate if increasing the concentrations of crude fat, Mg, arginine, and valine in commercial formulas enhances psittacine chick growth and health.
3

Detecção de Bornavírus, Poliomavírus e Circovírus em amostras biológicas, utilizando PCR e RT-PCR, de psitacídeos com diferentes aspectos clínicos / Detection of Avian Bornavirus, Polyomavirus and Circovirus in biological samples, using PCR and RT-PCR technique, from psittacine bird with different clinical manifestation

Azevedo, Natalia Philadelpho 11 June 2014 (has links)
Os vírus são patógenos importantes na saúde das aves, podendo levar a surtos que ameaçam de forma significante a população destas. O Bornavírus aviário (ABV), o Circovírus (BFDV) e o Poliomavírus (APV) são os agentes virais mais comuns e que mais ameaçam os psitacídeos de cativeiro. O ABV é responsável pela doença da dilatação proventricular (PDD) em psitacídeos e outras aves, uma doença neurológica letal, que foi descoberta no início da década de oitenta na Europa e América do Norte. A primeira infecção por APV descrita em aves foi em periquitos australianos (Melopsittacus undulatus) jovens, sendo depois associada com elevada mortalidade e morbidade em outros psitacídeos. O BFDV é o agente causador da doença do bico e das penas de psitacídeos, que ocorre quase exclusivamente em psitacídeos, principalmente em criatórios, aves em quarentena e lojas de animais. Foram testadas 120 amostras de psitacídeos de cativeiro no Brasil, para BFDV e APV e 112 amostras para ABV, resultando em 21 (17,5%) aves positivas para APV, 41 (34,17%) para BFDV e 32 (28,57 %) para ABV. Entre os animais positivos, quatorze apresentaram infecção concomitante, sete foram positivos para BFDV e ABV, seis positivos para BFDV e APV e uma positiva para BFDV, APV e ABV. Dentre os animais positivos para BFDV, os sinais clínicos mais comuns encontrados foram apteria e apatia/anorexia, em relação às aves positivas para APV foram a apatia/anorexia, enquanto para ABV os sinais neurológicos foram os mais representados. A detecção de APV, BFDV e ABV demostra a ocorrência destes vírus testados em psitacídeos de cativeiro no Brasil, tanto em espécies exóticas como em espécies nativas. / Viruses are important pathogens in avian health and may lead to outbreaks that threaten significantly the population of birds. The Avian Bornavírus (ABV), Circovirus (BFDV) and Avian Polyomavirus (APV) are the most common viral agents that threaten parrots in captivity. The ABV is responsible for the proventricular dilation (PDD) in parrots and other birds, a lethal neurological disease, which was discovered in the early eighties in Europe and North America the disease. The first APV infection in birds has been described in young Australian budgerigars (Melopsittacus undulatus), after being associated with high mortality and morbidity in other parrots. The BFDV is the causative agent of Beak and Feathers Disease, which occurs almost exclusively in psittacines, especially in aviary, quarantine birds and pet stores. A total of 120 captivity parrots were tested in Brazil for BFDV and APV and 112 samples for ABV, resulting in 21 (17.5%) positives for APV, 41 (34.17%) for BFDV and 32 (28.57%) for ABV. Among the positive animals, fourteen had concomitant infection, six were positive for both APV and BFDV, seven for BFDV and ABV, and one sample was positive for BFDV, APV and ABV. Among BFDV positive animals, most common clinical signs were apteria and apathy/anorexia, for APV positive birds were apathy/anorexia, while for ABV were neurological signs were the most represented. The detection of APV, BFDV and ABV demostrate the occurrence of all tested viruses in captive parrots in Brazil, including exotic and native species.
4

Detecção de Bornavírus, Poliomavírus e Circovírus em amostras biológicas, utilizando PCR e RT-PCR, de psitacídeos com diferentes aspectos clínicos / Detection of Avian Bornavirus, Polyomavirus and Circovirus in biological samples, using PCR and RT-PCR technique, from psittacine bird with different clinical manifestation

Natalia Philadelpho Azevedo 11 June 2014 (has links)
Os vírus são patógenos importantes na saúde das aves, podendo levar a surtos que ameaçam de forma significante a população destas. O Bornavírus aviário (ABV), o Circovírus (BFDV) e o Poliomavírus (APV) são os agentes virais mais comuns e que mais ameaçam os psitacídeos de cativeiro. O ABV é responsável pela doença da dilatação proventricular (PDD) em psitacídeos e outras aves, uma doença neurológica letal, que foi descoberta no início da década de oitenta na Europa e América do Norte. A primeira infecção por APV descrita em aves foi em periquitos australianos (Melopsittacus undulatus) jovens, sendo depois associada com elevada mortalidade e morbidade em outros psitacídeos. O BFDV é o agente causador da doença do bico e das penas de psitacídeos, que ocorre quase exclusivamente em psitacídeos, principalmente em criatórios, aves em quarentena e lojas de animais. Foram testadas 120 amostras de psitacídeos de cativeiro no Brasil, para BFDV e APV e 112 amostras para ABV, resultando em 21 (17,5%) aves positivas para APV, 41 (34,17%) para BFDV e 32 (28,57 %) para ABV. Entre os animais positivos, quatorze apresentaram infecção concomitante, sete foram positivos para BFDV e ABV, seis positivos para BFDV e APV e uma positiva para BFDV, APV e ABV. Dentre os animais positivos para BFDV, os sinais clínicos mais comuns encontrados foram apteria e apatia/anorexia, em relação às aves positivas para APV foram a apatia/anorexia, enquanto para ABV os sinais neurológicos foram os mais representados. A detecção de APV, BFDV e ABV demostra a ocorrência destes vírus testados em psitacídeos de cativeiro no Brasil, tanto em espécies exóticas como em espécies nativas. / Viruses are important pathogens in avian health and may lead to outbreaks that threaten significantly the population of birds. The Avian Bornavírus (ABV), Circovirus (BFDV) and Avian Polyomavirus (APV) are the most common viral agents that threaten parrots in captivity. The ABV is responsible for the proventricular dilation (PDD) in parrots and other birds, a lethal neurological disease, which was discovered in the early eighties in Europe and North America the disease. The first APV infection in birds has been described in young Australian budgerigars (Melopsittacus undulatus), after being associated with high mortality and morbidity in other parrots. The BFDV is the causative agent of Beak and Feathers Disease, which occurs almost exclusively in psittacines, especially in aviary, quarantine birds and pet stores. A total of 120 captivity parrots were tested in Brazil for BFDV and APV and 112 samples for ABV, resulting in 21 (17.5%) positives for APV, 41 (34.17%) for BFDV and 32 (28.57%) for ABV. Among the positive animals, fourteen had concomitant infection, six were positive for both APV and BFDV, seven for BFDV and ABV, and one sample was positive for BFDV, APV and ABV. Among BFDV positive animals, most common clinical signs were apteria and apathy/anorexia, for APV positive birds were apathy/anorexia, while for ABV were neurological signs were the most represented. The detection of APV, BFDV and ABV demostrate the occurrence of all tested viruses in captive parrots in Brazil, including exotic and native species.
5

Population viability analysis of Puerto Rican parrots an assessment of its current status and prognosis for recovery /

Muiznieks, Britta Dace, January 2003 (has links) (PDF)
Thesis (M.S.)--North Carolina State University, 2003. / Title from PDF t.p. (viewed on May 16, 2004). Includes vita. Includes bibliographical references (p. 58-63).
6

Repertoár a specifika vokalizace papouška šedého (Psittacus erithacus) / Repertoire and specificity of vocalization in Grey parrot (Psittacus erithacus)

Kůrková, Petra January 2011 (has links)
The aim of the study was to map the repertoire of vocalization of four wild-caught grey parrots (Psittacus erithacus), two males and two females. Data were collected during nine days from June to November 2008 by recording of vocalization in standardized conditions. Recorded sounds (3 052) were categorized according to their characteristics using both visual inspection of spectrograms and listening. We found 70 different call types, which were combined into 18 bigger groups. We found no subject to use the whole repertoire. Important differences were found both between individuals and between males and females. almost all call types were used throuthout the whole period of recording. Model spectrograms of all call types are shown. Key words: grey parrot, Psittacus erithacus, repertoire, vocalization
7

Interactive Parrot Playgrounds

van Hoppe, Inge January 2014 (has links)
It is a challenging interaction design task to design for and with animals, especially when it comes to parrots as users. Not only because working with parrots requires a lot of patience, but also because there is very few related work. Parrots are highly intelligent and that is often the problem when they are kept as companion animal. Parrots need a lot of stimuli to trigger their intelligence and to keep them busy, to avoid serious problems such as unwanted behaviour or self-mutilation.The body language and the needs of my parrot were the main input and formed the basis for the project. Through an iterative process of testing a variety of existing applications, small experiments and prototypes, a couple of interactive playgrounds have been developed for my parrot.
8

A nutritional and financial evaluation of breeding African Grey parrots (Psittacus erithacus)

Dennison, D. T. 12 1900 (has links)
Thesis (MPhil (Animal Sciences))--University of Stellenbosch, 2004. / African Grey Parrots are now being bred on a commercial scale in South Africa, mainly for the export market. In order to produce the best breeding results it is necessary to formulate balanced diets but no research has been done on the feeding value for African Grey parrots of ingredients used in formulating diets. Once the apparent metabolisable energy (AME) of extruded maize for African Greys has been established it will be possible to calculate the AME of other ingredients such as full fat soya, soya oil cake or sunflower oil cake. By feeding an extruded mix containing a known amount of maize mixed with a known amount of soya oil cake and establishing experimentally the AME of the mix, the AME of soya oil cake for African Greys can be calculated by difference. This information will make it possible to decide whether AME results obtained for poultry can be used in formulating diets for African Grey parrots. The study consisted of two parts where the determination of the apparent metabolisable energy (AME) of extruded maize and the practical application thereof in formulating parrot diets, and the economic viability of a commercial African Grey parrot breeding operation was investigated. A reference procedure adopted by several European laboratories for the in vivo determination of metabolisable energy (ME) was used to determine the apparent metabolisable energy (AME) of extruded whole maize for African Grey parrots. The long term goal is to make a well balanced, extruded diet for these birds. Extruded maize is the form in which maize is generally included in commercial parrot diets and was therefore chosen as the experimental feed. Maize can be conveniently extruded with other single ingredients such as full fat soyabean meal, soyabean oil cake meal or sunflower oil cake meal to determine, by difference, the AME of those ingredients. For the first part of the study, ten, 3-year-old African Grey parrots were individually housed and fed in cages designed to facilitate collection of the faeces. Cage design varied between a tall type (n=6) and a low type (n=4). The parrots were acclimatized to their new environment before the trial commenced to ensure normal feeding behaviour. The average AME value established for the ten African Grey Parrots was 16.8 MJ/kg. In the trial it became apparent that it is very difficult to get consistent results with the cages used and a modified cage design is proposed for the future. The second part of the study investigated the economic viability of breeding African Grey parrots commercially, with extruded maize as part of their diet. It was generally concluded that the breeding of African Grey parrots for the pet market can be considered as an economical venture.
9

Dimensões do desenvolvimento rural : uma análise dos PROINFs no Território Bico do Papagaio do Tocantins

Beraldo, Keile Aparecida January 2016 (has links)
Esta tese é resultado de pesquisa que teve o objetivo de compreender o processo de desenvolvimento do Território Bico do Papagaio, no estado do Tocantins (TBP-TO), com base na implantação de projetos PROINFs, vinculados aos Programas PRONAT e PTC, visando explicitar efeitos, avanços e limites das políticas públicas territoriais em regiões com baixos índices de desenvolvimento. Nesta pesquisa utilizou-se de múltiplas estratégias para a coleta e análise de dados, seguindo os princípios e técnicas da triangulação, que constitui uma das formas de combinar métodos qualitativos entre si e de articular métodos quantitativos e qualitativos. Foi realizada, por meio de estudo de caso, em sete projetos implantados no TBP-TO. Uma questão importante, do ponto de vista metodológico, foi a oportunidade de fazer uma imersão no contexto investigado, observando e participando diretamente com os atores envolvidos na implantação e execução dos projetos PROINFs no referido território. Lançou-se mão de informações obtidas por observações, entrevistas, participação em reuniões, seminários, conversa com diferentes atores territoriais, moradores e membros do colegiado, gestores e beneficiários destes projetos. Os resultados levaram a uma compreensão das diferentes dimensões do desenvolvimento territorial e seus efeitos na vida dos beneficiários e na região. Os indicadores de desenvolvimento territorial, do ponto de vista econômico, foram avaliados entre ruins e críticos, dando a entender que a operacionalização da política territorial no TBP-TO reflete a própria história das relações de poder e dominação já existentes. Por outro lado, do ponto de vista social, foi observado o empoderamento da sociedade civil, especialmente nos casos das duas Escolas Família Agrícola (EFAs). Nesse sentido, esta tese contribuiu, não só para entender as dimensões do desenvolvimento territorial, seus desafios e possibilidades, mas para demonstrar que se não houver maior diálogo entre poder público (nas esferas municipal, estadual e federal), sociedade civil e os beneficiários dos projetos, o desenvolvimento territorial pode ficar comprometido. Diante dos resultados da pesquisa conclui-se que, nesse momento de retrocesso da política de desenvolvimento territorial, é necessário repensá-la, especialmente em relação ao exercício do poder e à autonomia dos Colegiados Territoriais. A organização dos colegiados territoriais e a união de seus membros em torno de objetivos comuns podem ser consideradas o motor propulsor da consolidação das EFAs, possibilitando a educação profissional de seus jovens. Esta organização é o maior indicador de desenvolvimento, na dimensão social, observado na pesquisa. / This thesis is the result of research that aims to understand the development process of the Parrot´s Beak Territory in the State of Tocantins (PBT-TO), based on the implantation of PROINFs projects, linked to PRONAT and PTC programs with the goal of clarifying effects, advances and limits of territorial public policies in regions with low levels of development. In this research, it was used multiple strategies for data collection and analysis, following the principles and techniques of triangulation, which is one of the ways to combine qualitative methods among themselves and to articulate quantitative and qualitative methods. The research was done through the case study in seven projects implanted in PBT-TO. An important thing, from the methodological point of view, was the opportunity to do an immersion in the context investigated by observing and participating directly with the actors involved in the implementation and execution of the projects PROINFs, in that territory. It was used the information obtained by observations, interviews, participation in meetings, seminars, talking with different territorial actors, residents and members of the board, managers and beneficiaries of these projects. The results led to an understanding of the different dimensions of territorial development and its effects on the lives of beneficiaries and in the region. The indicators of territorial development, from an economic point of view, were evaluated between bad and critical, implying that the operationalization of territorial policy in the PBT-TO reflect the history of the relationships of power and domination that exists. On the other hand, from the social point of view, it was observed the empowerment of civil society, especially in the cases of the Escolas Família Agrícola (EFAs). In this sense, this thesis has contributed not only to understand the dimensions of territorial development, its challenges and opportunities, but to demonstrate that if there is no greater dialogue between public authorities (in all spheres: Municipal, State and Federal), civil society and the beneficiaries of the projects, the territorial development may be compromised. On the research results it is concluded that, in this moment of backsliding of territorial development policy, it is necessary to rethink it, especially in relation to the exercise of power and the autonomy of Territorial governance bodies. The Organization of territorial governance bodies and the Union of its members around common goals, can be considered the impeller motor on consolidation of EFAs enabling professional education of their young. This organization is the greatest indicator of development in the social dimension, observed in the survey.
10

Ecological Associations of the Hooded Parrot (Psephotus dissimilis)

Cooney, Stuart John Norman, stuart.cooney@anu.edu.au January 2009 (has links)
Interactions between nesting birds and invertebrates are a common, yet poorly understood ecological phenomenon. Many of these types of interactions are close and prolonged, and therefore potentially critical to one or both of the species involved in the interaction. However it is unusual for the nature of the interaction to be evaluated in a manner that reveals the impact of the relationship on both parties to the interaction. This study examines two relationships between nesting birds and invertebrates, both of which involve the hooded parrot (Psephotus dissimilis), a small grass parrot that inhabits the tropical savannas of northern Australia. ¶ The field-work for this project was conducted over two parrot breeding seasons in 2006 and 2007 near Katherine, Northern Territory, in the Australian dry tropics. In chapter II, I present data on the breeding biology of the hooded parrot as background for the study that follows. Nest building commenced in January, with peak activity in February and the last chicks fledged in April. Fifty three active nests were located. The mean number of eggs laid per nest was 4.5 (s.d. ± 0.9), of which 3.0 (± 1.79) hatched and 2.0 (± 2.0) fledged. Clutches were laid asynchronously over a period of a week and chicks remained in eggs for 18.6 (± 1.95 days). Chicks were 29.2 (± 2.9) days old when they fledged from the nest. These data are typical for Australian parrots. ¶ In chapter III, the unusual nature of the parrot’s nest site is examined. Many species of bird nest in natural cavities or those they excavate. Whilst cavity nesters as a whole experience increased nesting success, the greatest success is experienced by species that can excavate their own nests. Certain arboreal cavity nesters, such as woodpeckers, require extensive morphological adaptation for this behaviour, but this has not occurred in Australia, despite competition among birds and a suite of arboreal mammals for naturally occurring cavities. Some species, however, have adapted their behaviour to make use of substrates that are not as hard as wood. Hooded parrots excavate nests in terrestrial termitaria, releasing them from competition for limited arboreal cavities. However, I show that only termitaria with a high level of termite activity, and which are more than two metres tall, are suitable, and that the parrots exhibit a strong preference for the cathedral mounds of Nasutitermes triodiae. Nests placed in highly active mounds had a significantly higher success rate than those in mounds where activity was somewhat lower, suggesting that the behaviour is adaptive. ¶ The thesis then shifts focus from the parrot to its nest symbiont, first describing the species involved in the interaction in chapter IV, and then its behaviour in the nests of hooded parrots in chapter V. Trisyntopa neossophila sp. n. (Lepidoptera: Oecophoridae) was reared from the nest of the hooded parrot and described using morphological characters. Aspects of its biology are reported and similarities to the biology of Trisyntopa scatophaga found in the nests of the golden-shouldered parrot (Psephotus chrysopterygius) are discussed. The possibility that a moth was associated with the extinct paradise parrot (Psephotus pulcherrimus) is considered in the light of the phylogenetic relationships between the parrots. ¶ Trisyntopa neossophila is an unusual moth whose breeding cycle is shown to be closely synchronised with the hooded parrot. T. neossophila is one of three coprophagous, nest dwelling moths in the genus Trisyntopa. True coprophagy is rare in the Lepidoptera, although some species occasionally consume faeces to gain rare nutrients. T. neossophila lays its eggs in the nest of hooded parrots so that larvae hatch in synchrony with the hatching of the parrot’s eggs. The larvae spend their larval period in the nest and exclusively consume the excrement of the nestling parrots. When the parrot chicks fledge, the larvae move to the walls of the nest cavity to pupate, emerging the following wet season to repeat the process during the next parrot breeding season. ¶ With a description of the ecology of both species involved in the nesting symbiosis, chapter VI reviews the literature surrounding other interactions between nesting birds and invertebrates. A large number of birds are shown to nest in, or in close proximity to, structures made by invertebrates and avian nesting material provides a reliable shelter for many invertebrate species. However, the nature of such relationships has rarely been experimentally demonstrated. I propose that in order to understand the nature of these relationships they need to be explored within the theoretical framework of community ecology. Putative commensal and parasitic relationships have all been documented in the bird/invertebrate nesting literature, yet researchers, with few exceptions, repeatedly overlook the impact that these relationships are having on the invertebrate, at best assuming the nature of its impact, but more often ignoring its impact entirely. Here I present a framework for formulating hypotheses to ensure that the nature of the relationship can be identified. Only by explicitly stating the level of organisation at which the experiment is to occur (individual or population), identifying the net cost or benefit of the interaction, the range of conditions under which such costs or benefits would apply and the spatial and temporal context in which they apply, can an investigator expect to recognise and describe the often complex nature of these relationships. ¶ While parasitic and commensal relationships between nesting birds and invertebrates are commonly reported, mutualisms between birds and invertebrates have not been reported. Despite this, candidates for this type of relationship exist. Chapter VII uses the framework outlined in the literature review (chapter VI) to experimentally examine the relationship between the hooded parrot and Trisyntopa neossophila. By manipulating the populations of moth larvae in a sample of hooded parrot nests, we sought to establish the impact of the relationship on each species. The moth depends on the parrot for provision of shelter and a reliable food source. The parrot however, was neither benefited nor harmed by the interaction in terms of short term reproductive output or chick growth, although differences between the experimental and control nests were noted. The relationship between the hooded parrot and T. neossophila, at least during the study period, is therefore concluded to be commensal. ¶ Collectively, the chapters of this thesis explore the complicated interactions between species. The dependence of the moth on the parrot and the parrot on the termite, demonstrate the importance of understanding interactions between species in a manner that reveals the impacts of the interactions, the range of conditions under which they would apply and the level of organisation at which they apply, as outlined in chapter VI. The dependence of the animals in this study on each other makes them more vulnerable to extinction than previously thought. Whilst this may not be immediately significant for the hooded parrot/T. neossophila system, which is thought to be secure, the ecologically similar system on the Cape York Peninsula, involving the golden-shouldered parrot and its nest attendant moth Trysintopa scatophaga, is vulnerable to extinction and subject to intensive management to ensure its persistence. This study brings new information to the management of the golden-shouldered parrots and urgently recommends increased protection for Trysintopa scatophaga.

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