Exact(5)
It may come as a relief that most birds that got extra food survived winter better, bred earlier, and had more offspring, the authors report online 25 February in Frontiers in Ecology and the Environment.
Also, old males arrived and bred earlier than yearlings.
Others suggested that the shift reflected an evolutionary adaptation: Cod that bred earlier were more likely to pass on their genes before ending up on someone's dinner plate.
On the other hand, a high yielding cow might be looked upon by the farmer as hard to get pregnant and therefore started to be bred earlier i.e. a shorter VWP, which is supported by a high number of A.I in late conceiving cows (Table 1).
First, age was a strong predictor of male fertilization success, as older males bred earlier in the season, were more likely to have a second brood, were better at securing paternity, and gained more extrapair paternity throughout the breeding season than yearlings.
Similar(55)
The impeccably bred 2000 Derby winner, Fusaichi Pegasus, was sold to stud for more than $60 million.
She will be bred next year to another former Horse of the Year, Curlin.
Common cranes were also extinct in Britain for four centuries, but a record-breaking 48 pairs bred this year.
Bill Pabst, a chemist from Baltimore, and his 13-year-old son, Brandon, proudly showed off the corn snakes they bred last year.
Since they bred 25 years ago, the eagles have flourished on Rum, Skye and Mull, delighting tourists and upsetting some local crofters who blame them for taking lambs.
Ninety-four percent of animals were bred (15/16; AI, n = 7; natural mating, n = 8), and 80% (12/15) became pregnant.
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