Mechanics of feeding in the Mallard (Anas platyrhynchos L.; Aves, Anseriformes).--G. A. Zweers, A. F. C. Gerritsen, and P. J. van Kranenburg-Voogd. 1977. Contributions to Vertebrate Evolution, vol. $. vii + 109 pp., 20 figures. Paper $19.75.--For many years, primarily since the 1920's and 1950's, arian morphology has progressively become less descriptive and more functional in its approach. Emp...

The karyotype of the mallard duck, Anas platyrhynchos, was characterised on the basis of R and C bands. Chromosomal preparations obtained from in vitro blood lymphocyte cultures were RBG- and CBG-stained. The structures of nine and 14 pairs of chromosomes were analysed by the RBG and CBG chromosome banding techniques, respectively. The location of R bands, as well as the size and arrangement of...

Recently developed methods for analyzing mark–recapture data allow simultaneous modeling of information from a variety of animal encounters. Incorporating this extra information in an analysis requires use of a more complicated model but can lead to improved precision of estimates. An important aspect of such joint models is that movement of animals to and from the banding site can be incorpora...

A genetic linkage map for the duck (Anas platyrhynchos) was developed within a cross between two extreme Peking duck lines by linkage analysis of 155 polymorphic microsatellite markers, including 84 novel markers reported in this study. A total of 115 microsatellite markers were placed into 19 linkage groups. The sex-averaged map spans 1353.3 cM, with an average interval distance of 15.04 cM. T...