PubAg

Main content area

Search

8  Search Results

1 - 8 of 8
Number of results to display per page

Search Results

1. Ticks (Acari: Ixodida) on birds (Aves) migrating through the Polish Baltic coast

Author:
Ciebiera, Olaf; Jerzak, Leszek; Nowak-Chmura, Magdalena; Bocheński, Marcin
Source:
Experimental & applied acarology 2019 v.77 no.2 pp. 241-251
ISSN:
0168-8162
Subject:
Dermacentor reticulatus; Haemaphysalis punctata; Ixodes ricinus; Regulus; Turdus; acarology; autumn; beak; bird banding; birds; breeding; coasts; ears; eyes; females; hosts; larvae; males; neck; nymphs; parasitism; pathogens; spring; tick-borne diseases; ticks; wintering grounds; Poland
Abstract:
... Seasonal bird (Aves) migration between breeding and wintering areas, often located on different continents, can facilitate the spreading of tick species (Acari: Ixodida) and of tick-borne pathogens. The aim of the study was to analyse the occurrence of ticks dispersed by birds migrating along the Polish Baltic coast during spring and autumn migration. Field research was conducted at the bird ringi ...
DOI:
10.1007/s10493-019-00341-z

2. Multiple modalities in insect warning displays have additive effects against wild avian predators

Author:
Rojas, Bibiana; Mappes, Johanna; Burdfield-Steel, Emily
Source:
Behavioral ecology and sociobiology 2019 v.73 no.3 pp. 37
ISSN:
0340-5443
Subject:
Arctia plantaginis; Cladrastis lutea; Cyanistes caeruleus; additive effect; beak; birds; chemical defenses; color; death; mimicry (behavior); models; morphs; moths; odors; paper; predation; predators; wings
Abstract:
... Allocation to different components of defence has been suggested as an explanation for the existence of multiple aposematic morphs in a single population. We tested whether there are trade-offs between warning colouration and chemical defence or whether these have an additive effect when combined, using blue tits (Cyanistes caeruleus) as predators and the polymorphic wood tiger moth (Arctia planta ...
DOI:
10.1007/s00265-019-2643-6

3. Evolution of Beak Size and Song Constraints in Neotropical Seedeaters (Thraupidae: Sporophila)

Author:
Porzio, Natália S.; Repenning, Márcio; Fontana, Carla S.
Source:
Acta ornithologica 2019 v.53 no.2 pp. 173-180
ISSN:
0001-6454
Subject:
Neotropics; Thraupidae; acoustics; animal communication; beak; birds; body size; models; phylogeny; prediction
Abstract:
... Many traits influence birdsong diversity. Patterns observed in the acoustic parameters can be a result of morphological constraint and can also be explained by phylogenetic relationships. Understanding morphologic mechanisms that can act on song structure might account how they can catalyze speciation and how they evolve in lineages sort. We analyzed the evolution of beak volume and song constrain ...
DOI:
10.3161/00016454AO2018.53.2.007

4. Infraorbital Keratin Cyst in an Umbrella Cockatoo (Cacatua alba)

Author:
Turner, Rachel C.; Graham, Jennifer E.; Hahn, Shelley; Mariano, Abigail; McCarthy, Robert
Source:
Journal of avian medicine and surgery 2019 v.33 no.2 pp. 150-154
ISSN:
1082-6742
Subject:
Cacatua; beak; birds; computed tomography; cysts (pathology); females; histopathology; keratin
Abstract:
... A 10-year-old, female umbrella cockatoo (Cacatua alba) was presented for evaluation of a mass at the right commissure of the beak, with associated right periorbital swelling. A feather cyst was suspected, based on history and the results of a computed tomography scan and fine-needle aspirate. The cyst was surgically debrided and removed. Histopathologic results confirmed an infraorbital keratin cy ...
DOI:
10.1647/2018-342

5. Prevalence of Aves Polyomavirus 1 and Beak and Feather Disease Virus From Exotic Captive Psittacine Birds in Chile

Author:
González-Hein, Gisela; Gil, Isabel Aguirre; Sanchez, Rodolfo; Huaracan, Bernardo
Source:
Journal of avian medicine and surgery 2019 v.33 no.2 pp. 141-149
ISSN:
1082-6742
Subject:
Aves polyomavirus 1; Beak and feather disease virus; beak; bird diseases; birds; feathers; genes; genetic variation; hosts; polymerase chain reaction; Chile
Abstract:
... Avian polyomavirus disease and psittacine beak and feather disease (PBFD) are both contagious viral diseases in psittacine birds with similar clinical manifestations and characterized by abnormal feathers. To determine the prevalence of Aves polyomavirus 1 (APyV) and beak and feather disease virus (BFDV) in captive, exotic psittacine birds in Chile, feathers from 250 psittacine birds, representing ...
DOI:
10.1647/2018-349

6. Adaptive management assists reintroduction as higher tides threaten an endangered salt marsh plant

Author:
Noe, Gregory B.; Fellows, Meghan Q.N.; Parsons, Lorraine; West, Janelle; Callaway, John; Trnka, Sally; Wegener, Mark; Zedler, Joy
Source:
Restoration ecology 2019 v.27 no.4 pp. 750-757
ISSN:
1061-2971
Subject:
Chloropyron maritimum subsp. maritimum; adaptive management; annuals; beak; bees; birds; canopy; case studies; conservation areas; desalination; germination; global warming; grasses; indigenous species; introduced plants; littoral zone; monitoring; parasitism; perennials; pollinators; rain; regression analysis; reproduction; roots; salt marsh plants; salt marshes; temperature; tides; upland soils; California
Abstract:
... In theory, extirpated plant species can be reintroduced and managed to restore sustainable populations. However, few reintroduced plants are known to persist for more than a few years. Our adaptive‐management case study illustrates how we restored the endangered hemiparasitic annual plant, Chloropyron maritimum subsp. maritimum (salt marsh bird's beak), to Sweetwater Marsh, San Diego Bay National ...
DOI:
10.1111/rec.12934

7. Narrow entrance of short-tubed Aloe flowers facilitates pollen transfer on long sunbird bills

Author:
Hargreaves, A.L.; Langston, G.T.; Johnson, S.D.
Source:
South African journal of botany 2019 v.124 pp. 23-28
ISSN:
0254-6299
Subject:
Aloe; Nectarinia famosa; aviaries; beak; bee pollination; bees; bird pollination; birds; corolla; evolution; field experimentation; flower morphology; nectar; outcrossing; pollen; pollinators
Abstract:
... Trade-offs are considered a major factor in the evolution of ecological specialization, as organisms can rarely specialize on more than one niche. Here we ask whether flowers can be specialized for more than one pollinator group. We studied an outcrossing plant, Aloe kraussii (Asphodelaceae), whose floral morphology is intermediate between that of exclusively bird- and exclusively insect-pollinate ...
DOI:
10.1016/j.sajb.2019.04.013

8. On the Preservation of the Beak in <i>Confuciusornis</i> (Aves: Pygostylia)

Author:
Falk, Amanda; O’Connor, Jingmai; Wang, Min; Zhou, Zhonghe
Source:
Diversity 2019 v.11 no.11
ISSN:
1424-2818
Subject:
Aves; beak; birds; fluorescence; fossils; holotypes; phalanges
Abstract:
... The Confuciusornithiformes represent the most stem-ward avian occurrence of an edentulous rostrum. Although a keratinous beak is widely considered to have covered the rostrum in confuciusornithiforms, this feature is almost never preserved, having been previously reported only in the holotype of Confuciusornis dui and the holotype of Eoconfuciusornis zhengi. This strongly contrasts with the widesp ...
DOI:
10.3390/d11110212