Answer to Question 1
The reasons why artificial insemination has become more popular include:
1 . Improved breeding facilities and management skills have made AI possible for all producers.
2 . Long-life semen extenders and low-cost, rapid delivery methods have made it possible to obtain and store semen for 5-7 days before it is used.
3 . Modern methods of genetic evaluation have made it easier to identify superior genetics, and AI has made it possible to maximize use of better quality boars on more females.
4 . Production systems that require large groups of pigs with minimum age spread are possible because larger groups of females can be bred in a shorter time period than would be possible with hand mating.
5 . Use of AI lowers disease risk and improves health of swine herds by eliminating the need for continuous introduction of new animals into the herd.
Answer to Question 2
The advantages that wean-to-finish production have over traditional nursery-finishing production include:
1 . Reduced transportation costs through fewer moves and less labor to move pigs
2 . Reduced labor for power washing and disinfecting between groups
3 . Reduced stress of moving and commingling of pigs, resulting in improved average daily gain and feed efficiency
4 . Increased flexibility in facilities because finishing buildings are easier to modify than nurseries
5 . Reduced downtime between groups
Cranial capacity has increased approximately fourfold over the last 3.5 million years of hominin evo
Two areas of reduced cortical volume and one area of increased cortical volume observed in people ...
By how many times will the population of bacteria have increased after 6 h?
A Corner of the General Massage Section of an Army Hospital. A Practice of Physiotherapy by Sampson, ...
Foundations of evidence-based practice.
Artificial cross-fertilization of pea plants