Horn Growth and Population Quality in Dall Sheep

1978 ◽  
Vol 42 (4) ◽  
pp. 764 ◽  
Author(s):  
Fred L. Bunnell
Keyword(s):  
Horn Growth ◽  
Population Quality

Effect of Panicle Nitrogen Fertilizer Management on Yield and Population Quality in Mechanical Transplanted Super Rice Ningjing 1 with Different Seedling Ages

2013 ◽  
Vol 38 (8) ◽  
pp. 1460-1470 ◽  
Author(s):  
Zhong-Yang HUO ◽  
Hai-Yan WEI ◽  
Hong-Cheng ZHANG ◽  
Zhen-Kai GONG ◽  
Qi-Gen DAI ◽  
...  
Keyword(s):  
Nitrogen Fertilizer ◽  
Fertilizer Management ◽  
Population Quality

Effects of soil amendments on soil properties and population quality of rice in cold waterlogged paddy field

2013 ◽  
Vol 21 (7) ◽  
pp. 810-816
Author(s):  
Wen-Jun DONG ◽  
Pei-Zhi XU ◽  
Ren-Zhi ZHANG ◽  
Xu HUANG ◽  
Hua-Ping ZHENG ◽  
...  
Keyword(s):  
Soil Properties ◽  
Paddy Field ◽  
Soil Amendments ◽  
Population Quality

Horn growth patterns of Nubian ibex from the Sinai, Egypt

Mammalia ◽  
2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Omar Attum ◽  
Alaaeldin Soultan ◽  
Louis C. Bender
Keyword(s):  
Natural History ◽  
Arid Environment ◽  
Growth Patterns ◽  
Non Invasive ◽  
Significant Relationships ◽  
Horn Growth ◽  
Younger Age ◽  
Invasive Method ◽  
Viable Method ◽  
Horn Development

Abstract Documenting patterns of horn growth and horn-age relationships of Nubian ibex (Capra nubiana) can contribute to a more comprehensive understanding of their natural history, horn development in ibex in general, and future conservation of the species. Our specific objectives included (1) documenting age-horn growth patterns; (2) contrasting horn growth patterns of Nubian ibex with other ibex species; and (3) determining whether horn development accurately reflects age of Nubian ibex in Sinai, Egypt. As expected, all male and female horn measurements had significant relationships with age. Horn growth in males started plateauing at ca. age 7–8, whereas female horn growth started plateauing at ca. age 4–6. The extremely arid environment of Nubian ibex in the Sinai may account for the slowing of horn growth at a younger age than seen in populations of some other ibex species. We found a significant relationship between the number of horn ridges and age, indicating that counting horn ridges provides a viable method of aging males to within ±1 y. Thus counting horn ridges may be a useful and non-invasive method to determine age or age class, which can further our understanding of age structure, the natural history, and management of Nubian ibex populations.

The Birth of Assisted Reproductive Technology in China

Good Quality ◽  
2018 ◽  
Author(s):  
Ayo Wahlberg
Keyword(s):  
Family Planning ◽  
Assisted Reproductive Technology ◽  
Birth Control ◽  
Assisted Reproductive Technologies ◽  
Reproductive Technologies ◽  
Reproductive Technology ◽  
The Core ◽  
Sperm Banks ◽  
Population Quality

This chapter chronicles the difficult birth of assisted reproductive technologies (ARTs) in China through the 1980s and 1990s, showing how ideas of improving population quality acted as a persuasive alibi for those pioneers working to develop fertility technologies under crude conditions and at a time when contraception rather than conception was at the core of family planning. From difficult beginnings in the 1980s and following legalization in 2003, ARTs have now settled firmly within China’s restrictive reproductive complex as technologies of birth control—which, in turn, has allowed it to grow into a thriving, sector as China is now home to some of the world’s largest fertility clinics and sperm banks.

Israeli urban settlement — an attempt at scaling and ranking according to population quality index

Geoforum ◽  
1973 ◽  
Vol 4 (1) ◽  
pp. 63-69
Author(s):  
D. Soen ◽  
J. Bleger† ◽  
M. Hönig ◽  
M. Tamir ◽  
M. Run
Keyword(s):  
Quality Index ◽  
Urban Settlement ◽  
Population Quality
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