Conclusions

This brief chapter has provided a glimpse of some of the global issues and new technologies that may or may not influence the future development and use of dairy protein products. It is clear that milk proteins are expensive food ingredients and will increasingly be restricted to niche applications, and that global trends such as rising energy costs, scarcity of water and effect of greenhouse gases will increase the cost of production and will restrict land areas where they can be sustainably...

A role for milk in the control of mammary function in the tammar wallaby

The expression of milk protein genes is regulated concurrently by systemic endocrine factors, by paracrine factors such as the extracellular matrix and by autocrine factors secreted in the milk. Previous studies using a tammar wallaby mammary explant culture model (Nicholas and Tyndale-Biscoe, 1985) have shown that different combinations of insulin, cortisol and prolactin are required for expression of the a- and -casein genes, and whey protein genes including a-lactalbumin and -lactoglobulin...

The Cape fur seal Arctocephalus pusillus pusillus

The Cape fur seal suckles its pup for up to 10 months (Gentry and Holt, 1986) and lactation comprises alternate periods of several days on-shore suckling the young and extended periods at sea (Figure 2.10 Bonner, 1984 Oftedal et al., 1987 Trillmich, 1996). Foraging trips are variable but can extend to 23 days (Gamel et al, 2005). Nursing periods are generally 1-3 days and depletion of the mother's body reserves necessitates a return to the ocean to forage. A study by Cane et al. (2005) showed...