Quantification of microscopic feather characters used in the identification of North American plovers
Article Abstract:
A study examined the variation in plumulaceous barbs' microscopic characters in six species of Charadrius with the aim of quantifying characters and testing differences among taxa. Results found substantial difference among the barbs of four regions within each vane of a single feather although barbs from opposing vanes were not that different from one another. Findings also revealed two subgroups within Charadrius. The first sector comprises semipalmatus, vociferus and montanus while the other consists of wilsonia, alexandrinus and melodus.
Publication Name: The Condor
Subject: Biological sciences
ISSN: 0010-5422
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
Reproductive anatomy of the reed bunting: a species which exhibits a high degree of sperm competition through extra-pair copulations
Article Abstract:
The reed bunting is a socially monogamous passerine which exhibits a high level of sperm competition through extra-pair copulation. The reproductive anatomy of the reed bunting is described, in relation to the high degree of sperm competition. It is shown that the female tract shows adaptations linked to high levels of sperm competition, while the volume of cloacal protuberance and the weight of the testes of the male is larger than that in other species of comparable size.
Publication Name: The Condor
Subject: Biological sciences
ISSN: 0010-5422
Year: 1997
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: PCR amplification of ribosomal DNA for species identification in the plant pathogen genus Phytophthora
- Abstracts: Mutation rate in human microsatellites: influence of the structure and length of the tandem repeat. Unraveling autism
- Abstracts: Early determination of nasal-temporal retinotopic specificity in the eye anlage of the chick embryo. Interactive cellular modulation of chondrogenic differentiation in vitro by subpopulations of chick embryonic calvarial cells
- Abstracts: Adaptation of psychrophilic and psychrotrophic sulfate-reducing bacteria to permanently cold marine environments
- Abstracts: Genealogical concordance and the specific status of Peromyscus sejugis