scholarly journals Very high MHC Class IIB diversity without spatial differentiation in the mediterranean population of greater Flamingos

2017 ◽  
Vol 17 (1) ◽  
Author(s):  
Mark A. F. Gillingham ◽  
Arnaud Béchet ◽  
Alexandre Courtiol ◽  
Manuel Rendón-Martos ◽  
Juan A. Amat ◽  
...  
2006 ◽  
Vol 273 (1592) ◽  
pp. 1407-1414 ◽  
Author(s):  
Joachim Kurtz ◽  
K. Mathias Wegner ◽  
Martin Kalbe ◽  
Thorsten B.H Reusch ◽  
Helmut Schaschl ◽  
...  

Individual variation in the susceptibility to infection may result from the varying ability of hosts to specifically recognize different parasite strains. Alternatively, there could be individual host differences in fitness costs of immune defence. Although, these two explanations are not mutually exclusive, they have so far been treated in separate experimental approaches. To analyse potential relationships, we studied body condition and oxidative stress, which may reflect costs of immunity, in three-spined sticklebacks that had been experimentally exposed to three species of naturally occurring parasite. These sticklebacks differed in a trait, which is crucial to specific parasite defence, i.e. individual genetic diversity at major histocompatibility complex (MHC) class IIB loci. Oxidative stress was quantified as tissue acrolein, a technique that has been applied to questions of immuno-ecology for the first time. We measured gene expression at the MHC and other estimates of immune activation. We found that fish with high levels of MHC expression had poor condition and elevated oxidative stress. These results indicate that MHC-based specific immunity is connected with oxidative stress. They could, thus, also be relevant in the broader context of the evolution of sexually selected signals that are based on carotenoids and are, thus supposed to reflect oxidative stress resistance.


2001 ◽  
Vol 58 (3) ◽  
pp. 887-890 ◽  
Author(s):  
T. Binz ◽  
T. B. H. Reusch ◽  
C. Wedekind ◽  
M. Milinski

Author(s):  
Ross Shepard Kraemer

The alliance of the Roman Empire with the emerging orthodox Christian church in the early fourth century had profound consequences for the large population of Greek- (and Latin-)speaking Jews living across the Mediterranean diaspora. No known writings survive from diaspora Jews. Their experiences must be gleaned from unreliable accounts of Christian bishops and historiographers, surviving laws, and limited material evidence—synagogue sites, inscriptions, a few papyrus documents. Long neglected by historians, the diaspora population, together with its distinctive cultural forms, appears in decline by the early seventh century. This book explores why. In part, diaspora Jews suffered from disasters that affected the whole late antique Mediterranean population—continuing warfare, earthquakes, and plague. But, like all other non-orthodox Christians, Jews were subject to extensive pressures to become orthodox Christian, which increased over time. Late Roman laws, sometimes drafted by Christian lobbyists, imposed legal disabilities on Jews that were relieved if they became Christians. Fueled by malicious sermons of Christian bishops, Christian mobs attacked synagogues and sometimes Jews themselves. Significantly, Jews retained many of their earlier legal rights while other non-orthodox Christians lost theirs. In response, some Jews became Christians, voluntarily or under duress. Some probably emigrated to escape orthodox Christian pressures. Some leveraged political and social networks to their advantage. Some violently resisted their Christian antagonists. Jews may occasionally have entertained the possibility of divine messianic intervention or embraced forms of Jewish practice that constructed tighter social boundaries around them—an increased use of Hebrew, and heightened interest, perhaps, in rabbinic practices.


Heredity ◽  
2009 ◽  
Vol 104 (2) ◽  
pp. 155-167 ◽  
Author(s):  
B A Fraser ◽  
I W Ramnarine ◽  
B D Neff

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