While only a very small quantity of this down is produced per animal, it can be worthwhile for farmers or traders to comb or fellmonger (removing fibre from the surface of the skin using hair-removing chemical agents) the down from skins, especially when prices are high.
Hence, in the presence of (anticipated) long-term trend changes, we think that it can be worthwhile for a model to (be able to potentially) assume that the trend of a COI will increasingly approach the trend of RCs (that belong to the same group as the COI) during forecast years.
It can be worthwhile, instead, (a) for the investigation of disease mechanisms, (b) to shed light on potential therapies, or (c) to suggest clues for unidentified etiological agents in the case of diseases whose etiology is still unknown.
Given that the carotenoid biosynthesis pathway is most likely conditioned by a number of genes and regulatory elements, and that all of the variation in provitamin A levels are not accounted for, it can be worthwhile to consider genomic selection approaches for enhanced provitamin A carotenoid levels.
Recent works by, for example, Li and Lee (2005), Cairns et al. (2011), and Russolillo et al. (2011), show that it can be worthwhile to jointly forecast mortality for two or more populations, especially when they exhibit similar characteristics concerning health and mortality. .
Due to the availability of efficient small scale renewable energy generating plant, it can be worthwhile to consider on-site electricity generation for own use, especially where there are exploitable local resources (biomass or waste fuel, and/or a local wind or solar resource).
For these reasons, it can be worthwhile to investigate eating disorders during the perinatal period [ 1, 5, 8– 10].
