The overall probability that a multiply mated female will be misclassified as singly mated was only 0. Monte Carlo simulations were used to estimate maximum-likelihood parameters for the distribution of female remating frequency and the proportion of offspring sired by the second or subsequent mating males. Check if you have access through your login credentials or your institution. Remating frequencies and the effects of remating on various mating parameters were studied. The sperm displacement parameter estimated from doubly mated females were 0. If one population has few alleles, or one very common allele, then many males will share this allele, and detecting multiple paternity will be difficult, creating an artificially low rate of detected multiple paternity. Fitting a Poisson distribution of number of matings, the mean number of males mated by a female was 1.
Female Genotypes Affect Sperm Displacement in Drosophila
Although carefully collected, accuracy cannot be guaranteed. This same experimental design has been used in other Drosophila species, P 2 being the commonly used statistic in studies to evaluate sperm competitive ability Females were drawn from a set of chromosome-extracted lines from Winters, California, Beltsville, Maryland and Raleigh, North Carolina. If the number of emerged adults from the initial crosses is not enough, wait for a few more days and collect individuals from vials set up at different dates. The system came to an equilibrium with only three teams remaining, and this result was robust over many, but not all, starting conditions Figure 3a ,b. Female x male interactions in Drosophila sperm competition.
Female Remating, Sperm Competition and Sexual Selection in Drosophila - Cogprints
Increased sexual activity reduces male immune function in Drosophila melanogaster. Additional experiments showed that the effect was caused by components in the seminal fluid, not the sperm itself. Fill out the form below to receive a free trial or learn more about access:. Bundgaard et al JEB
Inference of sperm competition from broods of field-caught Drosophila
Description: After the progenies in v2 and v3 are inspected twice, the vials are discarded. Of course, all else may not be equal. The incidence of sperm displacement in insects: Subsequent refinements have been achieved by generating transgenic strains that expressed green and red fluorescent tags fused to sperm-specific proteins Multiple mating in wild Drosophila melanogaster revisited by microsatellite analysis.