Acarinose dos sacos aéreos de canários (Serinus canarius L.) e periquitos australianos (Melopsittacus undulatus, Shaw 1805) por Cytodites nudus (Vizioli, 1868)
نویسندگان
چکیده
منابع مشابه
A complete syllable dictionary for Serinus canarius
This paper is devoted to a detailed quantitative analysis of the vocal repertoire of a domestic male canary (Serinus Canarius) by multivariate statistical methods, and temporal and spectral feature extraction. In the first part of the paper, combination of various methods are employed to extract characteristic features to classify all syllables, and construct a complete seasonal syllable dictio...
متن کاملColony differences in auditory thresholds in the canary (Serinus canarius).
Adult canaries (Serinus canarius) from a closebred colony of the Belgian "Waterslager" strain were trained with operant techniques to respond to pure tones. A psychophysical tracking procedure was used to measure absolute auditory thresholds in quiet and in noise. Absolute thresholds in the middle- to high-frequency region of the audiogram were between 30 and 40 dB higher (4-5 standard deviatio...
متن کاملBrightness Discrimination in Budgerigars (Melopsittacus undulatus)
Birds have excellent spatial acuity and colour vision compared to other vertebrates while spatial contrast sensitivity is relatively poor for unknown reasons. Contrast sensitivity describes the detection of gratings of varying spatial frequency. It is unclear whether bird brightness discrimination between large uniform fields is poor as well. Here we show that budgerigars (Melopsittacus undulat...
متن کاملEdge Detection in Landing Budgerigars (Melopsittacus undulatus)
BACKGROUND While considerable scientific effort has been devoted to studying how birds navigate over long distances, relatively little is known about how targets are detected, obstacles are avoided and smooth landings are orchestrated. Here we examine how visual features in the environment, such as contrasting edges, determine where a bird will land. METHODOLOGY/PRINCIPAL FINDINGS Landing in ...
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ژورنال
عنوان ژورنال: Revista da Faculdade de Medicina Veterinária, Universidade de São Paulo
سال: 1965
ISSN: 2318-5066,0301-7273
DOI: 10.11606/issn.2318-5066.v7i2p419-428