I was delighted to see that a younger man didn't want to adopt children ["Proud to Be a
Nonbreeder," September].
A possible hypothesis to explain the origin of the outbreaks was that
nonbreeder kelp gulls carried P multocida gallicida to Hope Bay, and avian cholera was transmitted through water to skuas and penguins.
She reflects amusingly on bartering for sex in long term relationships, and on the--literally--explosive miracle of childbirth despite the fact she's a staunch
nonbreeder ("I ovulate sand").
Farm A is one of six turkey breeder farms in county A owned by a company that also operates
nonbreeder farms and a turkey meat processing plant in county A.
Just one
nonbreeder can cost up to 500ドル to buy and maintain--not to mention the lost potential of lambs not born.
He was, so to speak, a
nonbreeder in more ways than one.
Key words: avian demography, Forpus passerinus; Green-rumped Parrotlet; mark-recapture; multistate models;
nonbreeder; site fidelity; social systems; survival; tropical vs.
For one thing, although group dynamics might make a wolf a
nonbreeder one year, the animal might breed at another time under different circumstances, unlike ants or termites.
In most cases, it was easy to determine whether a bird was a breeder or a
nonbreeder. However, the distinction between
nonbreeders that began to build a nest but did not lay and birds that lost their clutch because of early predation raised problems.
Thus each adult is randomly classified as a breeder or
nonbreeder, based on the probability of breeding (b), a sex-dependent parameter of the model.
If reproductive effort or a suitable surrogate (e.g., status as a breeder or a
nonbreeder) could be identified or measured on captured individuals, then it should be possible to extend the multistate modeling approach of Nichols et al.