Forty-two percent of the Tree swallows we sampled were known to have bred at the same site the previous year.
To maximize the probability that 87Sr/86Sr and δD values in feathers were representative of the site in which they were sampled, we analyzed the P1 from marked adults known to have bred at the same site the previous year (n = 6 sites).
Isolates of identical RFLP profiles have indeed been detected in pigs bred at the same facility [ 14, 15, 20].
Wild-type C57BL/6J mice were obtained from Charles River Laboratories and bred at the same location as Smpdl3-deficient mice.
The numbers of differentially expressed genes for each contrast (between time points within breeds or between breeds at the same time point) were tabulated and are presented in Table 1.
Some clusters, such as MP-E1 and MP-E4, a portion of MP-E6, MP-E9, and MP-E12, and a portion of MP-E13, MP-V, MP-I2, and MP-M, were composed of strains isolated from poultry hatched in the same hatchery and bred at the same or similar time on farms belonging to the same farmer (Table 2).
For the Weddell seal's population size in the region to be unchanged, the species must have had sufficiently abundant prey over this period; therefore, it is plausible that prey resources for the Adélie penguin, which breeds at the same time of year as the Weddell seal, were also sufficient prior to 14 kya.
Semen from 19 boars, of which 8 were of Finnish Landrace and 11 of Yorkshire breed, housed at the same AI station, was used in this trial.
All mice were age matched and bred with mice of the same strain at the same time.
These findings reinforce the need for the implementation of management and breeding programs based on genetic data in order to minimize inbreeding, maintain overall genetic and allelic diversities and breed identities, while at the same time taking into account the within-breed genetic structure.
