scholarly journals Age-dependent trajectories differ between within-pair and extra-pair paternity success

2017 ◽  
Vol 30 (5) ◽  
pp. 951-959 ◽  
Author(s):  
Y.-H. Hsu ◽  
M. J. P. Simons ◽  
J. Schroeder ◽  
A. Girndt ◽  
I. S. Winney ◽  
...  
Keyword(s):  
Extra Pair Paternity ◽  
Age Dependent ◽  
Paternity Success

scholarly journals Sperm Morphology and Male Age in Black-Throated Blue Warblers, an Ecological Model System

Animals ◽  
2020 ◽  
Vol 10 (7) ◽  
pp. 1175
Author(s):  
Emily Cramer ◽  
Nicole Krauss ◽  
Tricia Rowlison ◽  
Pierre Comizzoli
Keyword(s):  
Sperm Morphology ◽  
Ecological Model ◽  
Model Species ◽  
Male Age ◽  
Extra Pair Paternity ◽  
Male Phenotype ◽  
Status Signal ◽  
Paternity Success ◽  
Ecological Model System ◽  
Older Males

Extra-pair paternity may drive selection on spermatozoa and ejaculate characteristics through sperm competition and cryptic female choice. Here, we examine sperm morphology in the black-throated blue warbler (Setophaga caerulescens), an ecological model species where extra-pair paternity is frequent and is linked with male age. We test whether sperm morphology relates to several aspects of male phenotype known or suspected to affect extra-pair paternity success. Sperm morphology did not correlate with the size of the white wing spot, a social status signal, nor with the volume of the cloacal protuberance. However, older males tended to have longer sperm cells. Although the sample size was limited, this pattern is intriguing, as longer cells may be advantageous in post-copulatory sexual selection and older males have larger testes and higher extra-pair paternity success in this species. Changes in sperm morphology with age are not observed in other birds, though they have been observed in insects and fishes. More research on sperm morphology is needed to clarify its role in extra-pair fertilizations in this well-studied species.

Effects of Hyperoxia on Lung Utrastructure

1970 ◽  
Vol 28 ◽  
pp. 26-27
Author(s):  
Gladys Harrison
Keyword(s):  
Central Nervous System ◽  
Nervous System ◽  
Light Microscopy ◽  
Oxygen Effects ◽  
Age Dependent ◽  
The Central Nervous System ◽  
The Subject ◽  
Space Age ◽  
Alveolar Septa ◽  
Extensive Damage

With the advent of the space age and the need to determine the requirements for a space cabin atmosphere, oxygen effects came into increased importance, even though these effects have been the subject of continuous research for many years. In fact, Priestly initiated oxygen research when in 1775 he published his results of isolating oxygen and described the effects of breathing it on himself and two mice, the only creatures to have had the “privilege” of breathing this “pure air”.Early studies had demonstrated the central nervous system effects at pressures above one atmosphere. Light microscopy revealed extensive damage to the lungs at one atmosphere. These changes which included perivascular and peribronchial edema, focal hemorrhage, rupture of the alveolar septa, and widespread edema, resulted in death of the animal in less than one week. The severity of the symptoms differed between species and was age dependent, with young animals being more resistant.

1248: Impact of Surgical Treatment of Renal Carcinoma on Renal Function and Blood Pressure: A Race- and Age-Dependent Association

2007 ◽  
Vol 177 (4S) ◽  
pp. 411-412
Author(s):  
Javier Miller ◽  
Angela Smith ◽  
Kris Gunn ◽  
Erik Kouba ◽  
Eric M. Wallen ◽  
...  
Keyword(s):  
Blood Pressure ◽  
Renal Function ◽  
Surgical Treatment ◽  
Renal Carcinoma ◽  
Age Dependent

Age-dependent differences in postoperative HLA-DR expression in cardiac surgery patients

2011 ◽  
Vol 59 (S 01) ◽  
Author(s):  
K Lazouski ◽  
A Zittermann ◽  
M Schmidt ◽  
J Gummert ◽  
J Börgermann
Keyword(s):  
Cardiac Surgery ◽  
Hla Dr ◽  
Age Dependent

Age dependent de-differentiation across functional domains

2012 ◽  
Vol 43 (01) ◽  
Author(s):  
C Roski ◽  
S Caspers ◽  
S Lux ◽  
S Eickhoff ◽  
K Zilles
Keyword(s):  
Functional Domains ◽  
Age Dependent
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