Recent evolution of Zosterops lateralis on Norfolk Island, Australia

1978 ◽  
Vol 56 (7) ◽  
pp. 1624-1626 ◽  
Author(s):  
P. R. Grant

Zosterops lateralis invaded Norfolk Island in 1904. In the next 9 years it hybridized with Zosterops tenuirostris to a small extent. Evolutionary change in lateralis is indicated by a comparison of bill measurements in samples collected in different years. Specimens collected in 1926 had narrower bills than did those collected in 1912–1913 and in 1968–1969. These changes were not produced by hybridization. They may have been caused by selection whose direction was reversed after 1926, but the reasons are obscure.

Author(s):  
J. Richtsmeier ◽  
K.M. Lesciotto

Traditionally, anthropologists study evolutionary change throughmorphological analysis of fossils and comparative primate data. For the analysis of the genotypephenotype continuum, the current emphasis on genes is misplaced because genes don’t make structure. Developmental processes make structure through the activity of cells that use instructions specified by genes. A critical mechanism underlying any phenotypic trait is the genetically guided change in developmental events that produce the trait. But even when a developmental mechanism is identified, the links between genetically guided instructions and phenotypic outcome are lengthy, complicated, flexible, and sensitive to physical forces of functioning organs. We use the study of craniofacial phenotypes of craniosynostosis (premature closure of sutures) to demonstrate how patterns produced by the covariation of cranial traits cannot always reveal mechanism. Next we turn to encephalization, a critical feature of human evolution that covaries with cranial phenotypes, and show how experimental approaches can be used to analyze mechanism underlying this well-documented pattern in human evolution. With the realization that no single line of evidence can explain the dramatic changes in cranial morphology that characterize human evolution come fundamental changes in the way we conduct anthropological inquiry - collaborative efforts from scientists with diverse expertise will continue to push the field forward.


2020 ◽  
Author(s):  
Phil Gregory ◽  
Chris Sharpe
Keyword(s):  

2020 ◽  
Author(s):  
Bas van Balen ◽  
David Christie
Keyword(s):  

Author(s):  
Van T. Cao ◽  
Rodney A. Lea ◽  
Heidi G. Sutherland ◽  
Miles C. Benton ◽  
Reza S. Pishva ◽  
...  
Keyword(s):  
Body Fat ◽  
A Genome ◽  

1924 ◽  
Vol 17 (4) ◽  
pp. 307-373 ◽  
Author(s):  
George Foot Moore

The centuries which we designate politically by the names of the dominant powers of the age successively as the Persian, Greek, and Roman periods of Jewish history constitute as a whole an epoch in the religious history of Judaism. In these centuries, past the middle of which the Christian era falls, Judaism brought to complete development its characteristic institutions, the school and the synagogue, in which it possessed, not only a unique instrument for the education and edification of all classes of the people in religion and morality, but the centre of its religious life, and to no small extent also of its intellectual and social life. Through the study of the Scriptures and the discussions of generations of scholars it defined its religious conceptions, its moral principles, its forms of worship, and its distinctive type of piety, as well as the rules of law and observance which became authoritative for all succeeding time. In the light of subsequent history the great achievement of these centuries was the creation of a normative type of Judaism and its establishment in undisputed supremacy throughout the wide Jewish world.


2008 ◽  
Vol 5 (1) ◽  
pp. 44-46 ◽  
Author(s):  
John F.Y Brookfield

The concept of ‘evolvability’ is increasingly coming to dominate considerations of evolutionary change. There are, however, a number of different interpretations that have been put on the idea of evolvability, differing in the time scales over which the concept is applied. For some, evolvability characterizes the potential for future adaptive mutation and evolution. Others use evolvability to capture the nature of genetic variation as it exists in populations, particularly in terms of the genetic covariances between traits. In the latter use of the term, the applicability of the idea of evolvability as a measure of population's capacity to respond to natural selection rests on one, but not the only, view of the way in which we should envisage the process of natural selection. Perhaps the most potentially confusing aspects of the concept of evolvability are seen in the relationship between evolvability and robustness.


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