Egg spottiness reflects female condition, physiological stress, and ornament expression in a common rallid species

The Auk ◽  
2020 ◽  
Vol 137 (4) ◽  
Author(s):  
Piotr Minias ◽  
Jesús Gómez ◽  
Radosław Włodarczyk
Keyword(s):  
Physiological Stress ◽  
Genetic Traits ◽  
Negatively Associated ◽  
Female Condition ◽  
Avian Order ◽  
Eggshell Pigmentation ◽  
Egg Coloration ◽  
Maternal Quality ◽  
Evolutionary Lineages ◽  
Order Passeriformes

Lay Summary • There is equivocal support for direct associations between maternal quality and deposition of protoporphyrin pigmentation (dark spots and blotches) in avian eggshells. • Research on protoporphyrin eggshell pigmentation has primarily focused on a single avian order (Passeriformes). • We examined associations of protoporphyrin-based eggshell pigmentation with female phenotypic and genetic traits in a non-passerine species, the Eurasian Coot. • Deposition of protoporphyrin in eggshells (total number per area of egg spots) positively correlated with female condition and expression of a putative bare-part ornament (frontal shield), while it was negatively associated with the level of physiological stress. • Protoporphyrin-based eggshell pigmentation acts as a reliable signal of female phenotypic (but not genetic) traits in the Eurasian Coot. • Signaling properties of protoporphyrin-based egg coloration are likely to largely differ between different evolutionary lineages of birds.

Egg coloration is correlated with female condition in eastern bluebirds (Sialia sialis)

2005 ◽  
Vol 59 (5) ◽  
pp. 651-656 ◽  
Author(s):  
Lynn Siefferman ◽  
Kristen J. Navara ◽  
Geoffrey E. Hill
Keyword(s):  
Sialia Sialis ◽  
Female Condition ◽  
Eastern Bluebirds ◽  
Egg Coloration

Emotions and health: The impact of emotions, emotions regulation, music, and acculturation on health

2008 ◽  
Vol 16 (3) ◽  
pp. 112-115 ◽  
Author(s):  
Stephan Bongard ◽  
Volker Hodapp ◽  
Sonja Rohrmann
Keyword(s):  
Stress Responses ◽  
Physiological Stress ◽  
Anger Expression ◽  
Domain Specific ◽  
Cardiovascular Stress ◽  
Expression Behavior ◽  
Cardio Vascular ◽  
And Coping ◽  
Relationship Of ◽  
The Impact

Abstract. Our unit investigates the relationship of emotional processes (experience, expression, and coping), their physiological correlates and possible health outcomes. We study domain specific anger expression behavior and associated cardio-vascular loads and found e.g. that particularly an open anger expression at work is associated with greater blood pressure. Furthermore, we demonstrated that women may be predisposed for the development of certain mental disorders because of their higher disgust sensitivity. We also pointed out that the suppression of negative emotions leads to increased physiological stress responses which results in a higher risk for cardiovascular diseases. We could show that relaxation as well as music activity like singing in a choir causes increases in the local immune parameter immunoglobuline A. Finally, we are investigating connections between migrants’ strategy of acculturation and health and found e.g. elevated cardiovascular stress responses in migrants when they where highly adapted to the German culture.

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