Animal Science Lab Exam 2 Review

Animal Science Lab Exam 2 Review - Animal Science Lab Exam...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon
Animal Science Lab Exam 2 Swine The US ranks third in terms of swine production China is the top swine producing country The top six swine producing states in the US are Iowa, North Carolina, Minnesota, Illinois, Indiana, and Nebraska Vertically integrated farms- where the owner may own the feedmill, all production units, and the packaging plant Pork production is growing rapidly in the Texas Panhandle due to the presence of the Seaboard Packing Plant in Guymon, Oklahoma, and vertically integrated farms Major reasons the Panhandle is a good location for large scale hog production- 1) environmental soundness, 2) water availability, 3) feedstuffs, 4) remote locations, 5) trainable workforce Artificial Insemination has gained industry-wide acceptance in the past 2 decades. It is estimated that over 80% of all sows are artificially inseminated. This simple procedure can reduce the cost of superior genetics by reducing the number of boars needed, and increasing the availability of these superior genetics. All-in All-out is a common management practice that has been embraces in all swine production systems. This system completely empties a barn between groups of hogs and allows for cleaning, disinfection, and better disease control. This practice requires a higher level of management, as hogs must be coordinated in groups such that enough hogs to fill a barn are ready to enter at the same time, and they then must be managed such that all can leave the barn at the same time. Partially filled barns are efficient and cost producers extra money. Crossbreeding is important in commercial swine production as approximately 95% of the hogs marketed annually in the US are crossbred. Hybrid vigor (heterosis) represents the primary advantage associated with crossbreeding, occurs when the offspring are better than the average of their parents for a particular trait, traits predominantly influenced by this are maternal- oriented traits Crossbreeding systems take advantage of the complementarity between breeds, incorporating the strengths of two divergently selected breeds into the crossbred
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Swine spend the majority of their life in the finisher stage of production at 5-6 months Rotational systems generally use either three breeds rotated in order or two breeds rotated in a criss-cross manner, market hogs are produced as well as replacement gilts, one disadvantage is lower heterosis than the normal terminal system Terminal crossbreeding differs from rotational in that all offspring from the terminal mating are marketed and no replacement gilts are kept Rotaterminal system features replacement gilt production with 20% of herd using
Background image of page 2
Image of page 3
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 6

Animal Science Lab Exam 2 Review - Animal Science Lab Exam...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online