12. Thus, both natural and artificial selection are involved in breed diversification and give rise to the livestock’s genetic diversity. Each breed has been adapting for many years to the specific environmental conditions of the geographical region ...
Ecklonia maxima is an economically important kelp in South Africa. The harvested kelp is used mainly as feed for cultured Haliotis midae (abalone) on farms all along the South African South and West Coast. The effects that different harvesting methods have on the growth of sub-canopy kelps, ...
Thus, shea trees are both well-adapted and highly valued in this area, which underlines the importance of conserving this indige- nous tree species in the agroforestry systems of north- ern Ghana. Keywords Vitellaria paradoxa · Shea tree · Agroforestry · Tree population structures ...
Here, we also observed similar levels of selfing despite different population densities. The stability of this mixed mating system is puzzling. It has been proposed that the evolutionary stability of mixed mating systems is determined by the timing and relative amount of self- and outcross-...
France, fiber optic guided missile systems, development of high speed UV curable coatings [...] ul.com 他的研究项目包括开发第一个横跨大西洋的海底光波系统,从美国新泽西州到英国和法国的海底光缆系统 TAT-8,开发光纤制导导弹系统,以 及开发高速紫外光固化光纤涂料,甚至是用于保护户外电信系统的控释杀虫...
Incentive structure of tax systems in Africa 来自 ResearchGate 喜欢 0 阅读量: 54 作者: JF Ruhashyankiko,R Stern 摘要: The views expressed in this paper are those of the author(s) only, and the presence of them, or of links to them, on the IMF website does not imply that the ...
The Basic Tasks of Organization ORGANIZATIONAL CHALLENGE: design structure & systems that: • Permit specialization • Facilitate coordination by grouping individuals & link groups with systems of communication, decision making, & control • Deploy incentives to align individual & firm goals ...
This chapter explores the issue of vaccine delivery through a focus on the political economic logics of the vaccine delivery structure COVAX and its relationship to South Africa as well as the South African states challenge and confrontation of its inequitable structures. Through an examination of ...
We suggest that a series of subduction zones, together called Telkhinia, may have defined two separate palaeo-oceanic plate systems—the Pontus and Thalassa oceans. Our reconstruction provides constraints on the palaeolongitude and tectonic evolution of the Telkhinia subduction zones and Panthalassa ...
Whenever a subplot (50 m South, 50 m Northeast, 50 m Northwest away from the centre subplot) would fall outside the indigenous forest, we shifted to the opposite cardinal subplot falling inside the indigenous forest Full size imageVisual count of arthropods overlapped with the first vegetation ...