Experimentally elevated plasma levels of testosterone do not increase male reproductive success in blue tits

2004 ◽  
Vol 56 (5) ◽  
Author(s):  
Katharina Foerster ◽  
Bart Kempenaers
Keyword(s):  
Reproductive Success ◽  
Plasma Levels ◽  
Male Reproductive Success ◽  
Elevated Plasma ◽  
Blue Tits

scholarly journals Postweaning maternal care increases male chimpanzee reproductive success

2020 ◽  
Vol 6 (38) ◽  
pp. eaaz5746
Author(s):  
Catherine Crockford ◽  
Liran Samuni ◽  
Linda Vigilant ◽  
Roman M. Wittig
Keyword(s):  
Reproductive Success ◽  
Parental Investment ◽  
Maternal Care ◽  
Parental Loss ◽  
Male Reproductive Success ◽  
Complex Societies ◽  
Successful Reproduction ◽  
Using Data

Humans are unusual among animals for continuing to provision and care for their offspring until adulthood. This “prolonged dependency” is considered key for the evolution of other notable human traits, such as large brains, complex societies, and extended postreproductive lifespans. Prolonged dependency must therefore have evolved under conditions in which reproductive success is gained with parental investment and diminished with early parental loss. We tested this idea using data from wild chimpanzees, which have similarly extended immature years as humans and prolonged mother-offspring associations. Males who lost their mothers after weaning but before maturity began reproducing later and had lower average reproductive success. Thus, persistent mother-immature son associations seem vital for enhancing male reproductive success, although mothers barely provision sons after weaning. We posit that these associations lead to social gains, crucial for successful reproduction in complex social societies, and offer insights into the evolution of prolonged dependency.

scholarly journals Elevated plasma levels of transforming growth factor (TGF)-β1 and TGF-β2 in patients with disseminated malignant melanoma

1998 ◽  
Vol 77 (9) ◽  
pp. 1492-1494 ◽  
Author(s):  
K Krasagakis ◽  
D Thölke ◽  
B Farthmann ◽  
J Eberle ◽  
U Mansmann ◽  
...  
Keyword(s):  
Growth Factor ◽  
Malignant Melanoma ◽  
Plasma Levels ◽  
Transforming Growth Factor ◽  
Elevated Plasma ◽  
Tgf Β1

Elevated plasma levels of the long pentraxin, pentraxin 3, in severe dengue virus infections

2005 ◽  
Vol 76 (4) ◽  
pp. 547-552 ◽  
Author(s):  
Albert T.A. Mairuhu ◽  
Giuseppe Peri ◽  
Tatty E. Setiati ◽  
C. Erik Hack ◽  
Penelopie Koraka ◽  
...  
Keyword(s):  
Dengue Virus ◽  
Plasma Levels ◽  
Severe Dengue ◽  
Pentraxin 3 ◽  
Virus Infections ◽  
Elevated Plasma

Elevated Plasma Levels of Betatrophin in Women with Gestational Diabetes Mellitus

2015 ◽  
Vol 123 (06) ◽  
pp. 376-381 ◽  
Author(s):  
H. Yilmaz ◽  
M. Cakmak ◽  
T. Darcin ◽  
C. Demir ◽  
O. Inan ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Gestational Diabetes ◽  
Gestational Diabetes Mellitus ◽  
Plasma Levels ◽  
Elevated Plasma

POLYGYNY, REPRODUCTIVE SUCCESS AND CHILD HEALTH IN RURAL ETHIOPIA: WHY MARRY A MARRIED MAN?

2006 ◽  
Vol 39 (2) ◽  
pp. 287-300 ◽  
Author(s):  
MHAIRI A. GIBSON ◽  
RUTH MACE
Keyword(s):  
Reproductive Success ◽  
Male Reproductive Success ◽  
Family Status ◽  
Rural Ethiopia ◽  
Younger Age ◽  
Married Individuals ◽  
Males And Females ◽  
Child Nutritional Status ◽  
And Child Health ◽  
Better Than

Summary.This study examines the reproductive success of men and women in rural Ethiopia as a function of their marital status, specifically by comparing polygamously and monogamously married individuals. In line with predictions from evolutionary theory, polygamy is beneficial to male reproductive success (i.e. producing larger numbers of surviving offspring). The success of polygamously married females depends on wife rank: the first wives of polygamous husbands do better than monogamously married women and much better than second or third wives. These effects are mirrored in child nutritional status: the children of second and third wives have lower weight for height. Due to potential, largely unmeasurable differences in marriageability (quality) between individuals, it was not possible to support a model of either resource-holding polygyny combined with female choice or female coercion into unwanted marriages. First wives of polygamously married men marry at a younger age and attract a higher brideprice, suggesting that both the males and females in the marriage are likely to be of higher quality (due to wealth, family status or some other factor such as beauty). Unions that end up monogamous are likely to be between slightly lower quality individuals; and second and third wives, who marry at the oldest ages and attract the lowest brideprice, may be ‘making the best of a bad job’. The relatively long gap between first and second marriages may mean that first wives of highly marriageable males can enjoy considerable reproductive success before their husbands marry again.

Abstract: 66 ELEVATED PLASMA LEVELS OF MATRIX MATAROPROTEINASE (MMP)-2, MMP-9 AND TIMP-1 IN PATIENTS WITH PSEUDOXANTHOMA ELASTICUM (PXE)

2009 ◽  
Vol 10 (2) ◽  
pp. e214
Author(s):  
Y Noji ◽  
A Inazu ◽  
M-a Kawashiri ◽  
A Nohara ◽  
J Kobayashi ◽  
...  
Keyword(s):  
Plasma Levels ◽  
Pseudoxanthoma Elasticum ◽  
Elevated Plasma

Carotenoid-based plumage colouration in red bishops (Euplectes orix) — signalling presence rather than quality?

Behaviour ◽  
2011 ◽  
Vol 148 (11-13) ◽  
pp. 1372-1392 ◽  
Author(s):  
Alice U. Edler ◽  
Thomas W.P. Friedl
Keyword(s):  
Reproductive Success ◽  
Parasite Load ◽  
Blood Parasite ◽  
Male Reproductive Success ◽  
Sexually Dimorphic ◽  
Male Quality ◽  
Plumage Colouration ◽  
Selection For ◽  
Breeding Plumage

AbstractThe role of bright plumage colouration for female choice has been the focus of research in sexual selection for many years, with several studies showing that females prefer the most elaborately ornamented males, which are often also the highest quality individuals. Here, we analysed the associations between reproductive performance and plumage, body condition and blood parasite load in the red bishop (Euplectes orix), a sexually dimorphic and polygynous weaverbird species, where males in a carotenoid-based orange-to-red breeding plumage defend territories and build many nests to which they try to attract females. Male reproductive success in terms of number of nests accepted was mainly determined by the number of nests built, but was also positively related to blood parasite load, while we found no influence of plumage characteristics. Together with previously obtained data, our results indicate that plumage characteristics in the red bishop do not affect male reproductive success and are generally not suitable to reliably indicate male quality. We suggest that the primary function of the brilliant orange-scarlet breeding plumage might be presence signalling in terms of increasing conspicuousness of breeding males to females searching for mates.

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