1 / 18

Chap 6 continued Chap 7

Chap 6 continued Chap 7. Assimilation Efficiency. A = E assimilated / E total. GD Goodman-Lowe, JR Carpente, S. Atkinson (1999) Assimilation efficiency of prey in the Hawaiian monk seal ( Monachus schauinslandi ) Can. J. Zool. 77 : 653–660 .

yves
Download Presentation

Chap 6 continued Chap 7

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Chap 6 continued Chap 7

  2. Assimilation Efficiency • A = Eassimilated / Etotal

  3. GD Goodman-Lowe, JR Carpente, S. Atkinson (1999) Assimilation efficiency of prey in the Hawaiian monk seal (Monachus schauinslandi) Can. J. Zool. 77: 653–660 Variability due to differences in diet (quality) within a species

  4. Rumen e Omasum Abomasum Reticulum

  5. Rumen • Bacterial fermentation of cellulose

  6. Reticulum • Compression and regurgitation of plant material

  7. Omasum • Water re-absorption and further filtering

  8. Abomasum • Digestive fluids added to chyme

  9. Rabbits Non-cecal pellet cecal

  10. So, with all these adaptations… • Are cows any good at assimilating energy from food? • “A” for several species • Elephant – 1.5% • Cow – 11% • Pig – 13% • Grasshopper – 37% • Tent catepillar – 57%

  11. Applied Efficiencies or carn herb autotroph

  12. Land needed to feed cow / mo: range = 12.3 acres productive area = 1 Water needed for beef = 2500gal/lb No. of animal species threatened with extinction on rangelands = 90 Excrement by total US human population: 12,000 lb/sec Excrement by US livestock: 250,000 lb/sec (including 25 pounds of manure per cow per day) Big impact by eating lower on the food chain

  13. Chap 7 • Concentrate: • Introduction • Carbon • Water • Nitrogen • Microbes

  14. Figure 7.2

  15. Figure 7.4

  16. Figure 7.5

More Related