Native and Exotic Birds in a Suburban Habitat

1984 ◽  
Vol 11 (1) ◽  
pp. 181 ◽  
Author(s):  
RJ Green
Keyword(s):  
Negative Correlation ◽  
Exotic Plants ◽  
Influential Factor ◽  
Native Vegetation ◽  
Artificial Structures ◽  
Exotic Birds ◽  
Foraging Site ◽  
Native Birds ◽  
Factor Governing ◽  
Native Habitats

The exotic and native birds in the eastern suburbs of Melbourne, including the campus of Monash University, were studied during 1974-77. The proportion of exotic to native birds was far greater in suburban than native habitats. 'Total native vegetation' was found to be the most influential factor governing the number of both native and exotic birds, showing a positive and a negative correlation respectively. 'Total exotic plants' and various vegetation heights were also correlated, but were less important. The ground was the major foraging site for birds as a whole, followed by Eucalyptus spp. Native birds foraged proportionately more than did exotic birds on native rather than exotic plants, and in trees or shrubs rather than on the ground. When not foraging, they were seen proportionately more often than the exotics on native rather than exotic plants, and the exotics were seen proportionately far more often than the natives on artificial structures.

Checklist of the parasitic nasal mites of birds in Brazil

2018 ◽  
Vol 23 (8) ◽  
pp. 1672 ◽  
Author(s):  
Carolina Silveira Mascarenhas ◽  
Fabiana Fedatto Bernardon ◽  
Silvia Gastal ◽  
Gertrud Müller
Keyword(s):  
South America ◽  
Introduced Species ◽  
Bird Species ◽  
The Family ◽  
Exotic Birds ◽  
New Research ◽  
Native Birds

The diversity of avian nasal mites has been incompletely studied in South America and most reports have been made on the fauna of Brazil, especially from the 1940s to 1970s. Recently, the development of new research has contributed records of species not previously reported in the country. As a result, a compilation of records of nasal mites (Astigmata: Cytoditidae, Turbinoptidae; Prostigmata: Ereynetidae; Mesostigmata: Rhinonyssidae) of birds in Brazil is presented. One hundred and twenty-four species of nasal mites were recorded parasitizing 168 bird species. The Rhinonyssidae was the family with the highest number of mites reported (108 species). Most nasal mite hosts in Brazil are native birds, however, mites have also been reported parasitizing captive exotic birds, as well as introduced species and domesticated birds.

scholarly journals Effects of exotic plants in native vegetation on species richness and abundance of birds and mammals

Pest or Guest ◽  
2007 ◽  
pp. 216-221 ◽  
Author(s):  
Brad R. Murray ◽  
Chris R. Dickman ◽  
Tessa Robson ◽  
Adele Haythornthwaite ◽  
Andrew J. Cantlay ◽  
...  
Keyword(s):  
Species Richness ◽  
Exotic Plants ◽  
Native Vegetation ◽  
Species Richness And Abundance

A study of the ecological history, vegetation and conservation management of Ile aux Aigrettes, Mauritius

1989 ◽  
Vol 5 (4) ◽  
pp. 355-374 ◽  
Author(s):  
John A. N. Parnell ◽  
Q. Cronk ◽  
P. Wyse Jackson ◽  
W. Strahm
Keyword(s):  
Exotic Species ◽  
Human Disturbance ◽  
Conservation Management ◽  
Exotic Plants ◽  
Native Vegetation ◽  
Vegetation Types ◽  
Lowland Forest ◽  
Ecological History ◽  
Extreme Type ◽  
Tabebuia Pallida

ABSTRACTMuch of the unique native vegetation of Mauritius has been destroyed. Coastal ebony (Diospyros egrettarum I.B.K. Richardson) forest forms an extreme type of Mauritian lowland forest which no longer exists on mainland Mauritius and only survives on one offshore islet, Ile aux Aigrettes. Undisturbed D. egrettarum forest is resistant to invasion by exotic plants, which have now invaded most relict patches of native lowland vegetation in Mauritius. Human disturbance however, has allowed many exotics (particularly Flacourtia indica (Burm. fil.) Merrill) to invade and form new vegetation types. Much of the disturbance was caused by illegal woodcutting up to 1985, prompted by an acute fuelwood shortage in Mauritius. On the basis of 132 4 X 4 m quadrats, we recognize 10 types of natural, semi-natural and exotic vegeta-tion. The conservation of the remaining natural ebony woodland vegetation requires the total cessation of woodcutting and the eradication of Tabebuia pallida (Lindl.) Miers (potentially the most damaging exotic species).

scholarly journals Aves exóticas en el AICA “Humedales de Alvarado”, Veracruz, México/ Exotic birds in the IBA “Humedales de Alvarado”, Veracruz, Mexico

2015 ◽  
Vol 31 (3) ◽  
Author(s):  
Patricia Ramírez-Bastida ◽  
Amira Ruiz-Rodríguez ◽  
Adolfo G. Navarro Sigüenza ◽  
Mishael Vargas-Gómez ◽  
Uriel Daniel García-Valencia
Keyword(s):  
Urban Areas ◽  
Monk Parakeet ◽  
Myiopsitta Monachus ◽  
Exotic Birds ◽  
Native Birds ◽  
Important Bird Area

We report records of Eurasian Collared-Dove (Streptopelia decaocto), Monk Parakeet (Myiopsitta monachus), and Orange-fronted Parakeet (Eupsittula canicularis), in the estuaries and floodplains of the Important Bird Area ‘Humedales de Alvarado’, Veracruz, from 2011 to 2014. Both exotic Parakeets were observed in mixed flocks with native Olive-throated Parakeet (Eupsittula nana). These species can out compete for resources with native birds andneed to be monitored. Both S. decaocto and M. monachus are successfulinvaders in many urban areas of Mexico.

scholarly journals Things that white men have in great quantity: Chickens and other exotic birds among Karitiana (Rondônia, Brazilian Amazon)

2019 ◽  
pp. 13-34
Author(s):  
Felipe Vander Velder
Keyword(s):  
Food Production ◽  
Amazon Basin ◽  
Indigenous Population ◽  
Bird Species ◽  
White Men ◽  
Brazilian Amazon ◽  
Gallus Domesticus ◽  
Gallus Gallus Domesticus ◽  
Exotic Birds ◽  
Native Birds

This article discusses the inclusion of domestic chicken (Gallus gallus domesticus, Linnaeus 1758) and other exotic bird species as part of the knowledge and practices related to birds (an ethnoornithology) among the Karitiana, a Tupi-Arikém-speaking indigenous people in the northern part of the state of Rondônia, in the southwestern Brazilian Amazon . Chickens are believed to have been introduced to the Amazon basin after contact with non-indigenous population, although this claim is controversial . They were initially associated with certain native birds . However, certain remarkable characteristics of these birds soon sparked reflection through which the species was gradually distinguished from the birds of the forest . These reflections influence how the Karitiana currently relate to chickens, which includes raising them in the villages, a practice encouraged by public policies related to food production, security, and sovereignty .

Testing the Assumption of Uncorrelated Errors for Short Scales by Means of Structural Equation Modeling

2014 ◽  
Vol 35 (4) ◽  
pp. 201-211 ◽  
Author(s):  
André Beauducel ◽  
Anja Leue
Keyword(s):  
Structural Equation Modeling ◽  
Negative Correlation ◽  
Structural Equation ◽  
Error Score ◽  
Classical Test Theory ◽  
Test Theory ◽  
Equation Modeling ◽  
Eysenck Personality Questionnaire ◽  
Personality Questionnaire ◽  
True Score

It is shown that a minimal assumption should be added to the assumptions of Classical Test Theory (CTT) in order to have positive inter-item correlations, which are regarded as a basis for the aggregation of items. Moreover, it is shown that the assumption of zero correlations between the error score estimates is substantially violated in the population of individuals when the number of items is small. Instead, a negative correlation between error score estimates occurs. The reason for the negative correlation is that the error score estimates for different items of a scale are based on insufficient true score estimates when the number of items is small. A test of the assumption of uncorrelated error score estimates by means of structural equation modeling (SEM) is proposed that takes this effect into account. The SEM-based procedure is demonstrated by means of empirical examples based on the Edinburgh Handedness Inventory and the Eysenck Personality Questionnaire-Revised.

Looks like a bad sign: Illusory negative correlation between the outcomes of choice options

2014 ◽  
Author(s):  
Deborah Marciano-Romm ◽  
Assaf Romm ◽  
Sacha Bourgeois-Gironde ◽  
Leon Y. Deouell
Keyword(s):  
Negative Correlation

Thrombin generation in paediatric patients with congenital heart disease

2008 ◽  
Vol 28 (S 01) ◽  
pp. S61-S66 ◽  
Author(s):  
G. Cvirn ◽  
A. Rosenkranz ◽  
B. Leschnik ◽  
W. Raith ◽  
W. Muntean ◽  
...  
Keyword(s):  
Congenital Heart Disease ◽  
Heart Disease ◽  
Negative Correlation ◽  
Congenital Heart ◽  
Thrombin Generation ◽  
Significant Negative Correlation ◽  
Peak Height ◽  
Global Test ◽  
Paediatric Patients ◽  
Age Range

SummaryThrombin generation was studied in paediatric patients with congenital heart disease (CHD) undergoing cardiac surgery using the calibrated automated thrombography (CAT) in terms of the lag time until the onset of thrombin formation, time to thrombin peak maximum (TTP), endogenous thrombin potential (ETP), and thrombin peak height. The suitability to determine the coagulation status of these patients was investigated. Patients, material, methods: CAT data of 40 patients with CHD (age range from newborn to 18 years) were compared to data using standard coagulation parameters such as prothrombin (FII), antithrombin (AT), tissue factor pathway inhibitor (TFPI), prothrombin fragment 1.2 (F 1.2), thrombin-antithrombin (TAT), activated partial thromboplastin time (aPTT), and prothrombin time (PT). Results: A significant positive correlation was seen between ETP and FII (p < 0.01; r = 0.369), as well as between peak height and F II (p < 0.01; r = 0.483). A significant negative correlation was seen between ETP and TFPI values (p < 0.05; r = –0.225) while no significant correlation was seen between peak height and TFPI. A significant negative correlation was seen between F 1.2 generation and ETP (p < 0.05; r = –0.254) and between F 1.2 generation and peak height (p < 0.05; r = –0.236). No correlation was seen between AT and ETP or peak. Conclusions: CAT is a good global test reflecting procoagulatory and inhibitory factors of the haemostatic system in paediatric patients with CHD.

Platelet Function in Surgical Stress

1985 ◽  
Vol 54 (04) ◽  
pp. 849-852 ◽  
Author(s):  
O Naesh ◽  
J T Friis ◽  
I Hindberg ◽  
K Winther
Keyword(s):  
Stress Response ◽  
Negative Correlation ◽  
Surgical Stress ◽  
Plasma Concentrations ◽  
Serum Cortisol ◽  
Cortisol Concentration ◽  
Pulmonary Dysfunction ◽  
Arterial Po2 ◽  
Elective Cholecystectomy ◽  
Serum Cortisol Concentration

SummaryTen patients for elective cholecystectomy were studied pre-, per- and postoperatively. All had neurolept anesthesia. Plasma concentrations of β-TG, TXB2 and 5-HT and intraplatelet 5-HT were measured. Aggregation to ADP was recorded.Serum cortisol concentration was used as index of the stress response, showing peroperative increase and postoperative decrease. Closely related to this we observed a significant increase in P-β-TG and P-TXB2 with postoperative normalization in 6 patients without complications. P-5-HT had a peak peropera-tively and remained elevated postoperatively. A negative correlation between P--5-HT and decreasing intraplatelet 5-HT postoperatively was observed.High postoperative levels of P--5-HT seem to be related to low arterial Po2 and pulmonary dysfunction. In 3 patients with complications a second increase in P-β-TG, P-TXB2 and partly in P--5-HT was found. Platelets were temporarily refractory to ADP immediately following surgery and showed increased aggregabil-ity postoperatively. We conclude that platelets are activated in surgical stress.

The Contact Phase of Blood Coagulation in Diabetes Mellitus and in Patients with Vasculopathy

1984 ◽  
Vol 52 (03) ◽  
pp. 221-223 ◽  
Author(s):  
M Christe ◽  
P Gattlen ◽  
J Fritschi ◽  
B Lämmle ◽  
W Berger ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Molecular Weight ◽  
Blood Coagulation ◽  
High Molecular Weight ◽  
Negative Correlation ◽  
Factor Xii ◽  
C1 Inhibitor ◽  
High Molecular Weight Kininogen ◽  
Contact Phase ◽  
Α2 Macroglobulin

SummaryThe contact phase has been studied in diabetics and patients with macroangiopathy. Factor XII and high molecular weight kininogen (HMWK) are normal. C1-inhibitor and also α2-macroglobulin are significantly elevated in diabetics with complications, for α1-macroglobulin especially in patients with nephropathy, 137.5% ± 36.0 (p <0.001). C1-inhibitor is also increased in vasculopathy without diabetes 113.2 ± 22.1 (p <0.01).Prekallikrein (PK) is increased in all patients’ groups (Table 2) as compared to normals. PK is particularly high (134% ± 32) in 5 diabetics without macroangiopathy but with sensomotor neuropathy. This difference is remarkable because of the older age of diabetics and the negative correlation of PK with age in normals.

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