Effects of Sibling Competition on Growth, Oxidative Stress, and Humoral Immunity: A Two-Year Brood-Size Manipulation

2011 ◽  
Vol 84 (4) ◽  
pp. 429-437 ◽  
Author(s):  
Sophie Bourgeon ◽  
Sarah Guindre-Parker ◽  
Tony D. Williams
Keyword(s):  
Oxidative Stress ◽  
Humoral Immunity ◽  
Brood Size ◽  
Sibling Competition ◽  
Brood Size Manipulation

scholarly journals Twofold cost of reproduction: an increase in parental effort leads to higher malarial parasitaemia and to a decrease in resistance to oxidative stress

2011 ◽  
Vol 279 (1731) ◽  
pp. 1142-1149 ◽  
Author(s):  
Philippe Christe ◽  
Olivier Glaizot ◽  
Nicole Strepparava ◽  
Godefroy Devevey ◽  
Luca Fumagalli
Keyword(s):  
Oxidative Stress ◽  
Blood Cell ◽  
Red Blood Cell ◽  
Brood Size ◽  
Parus Major ◽  
Cost Of Reproduction ◽  
Cell Resistance ◽  
Parental Effort ◽  
Brood Size Manipulation ◽  
Measured Resistance

Parental effort is usually associated with high metabolism that could lead to an increase in the production of reactive oxidative species giving rise to oxidative stress. Since many antioxidants involved in the resistance to oxidative stress can also enhance immune function, an increase in parental effort may diminish the level of antioxidants otherwise involved in parasite resistance. In the present study, we performed brood size manipulation in a population of great tits ( Parus major ) to create different levels of parental effort. We measured resistance to oxidative stress and used a newly developed quantitative PCR assay to quantify malarial parasitaemia. We found that males with an enlarged brood had significantly higher level of malarial parasites and lower red blood cell resistance to free radicals than males rearing control and reduced broods. Brood size manipulation did not affect female parasitaemia, although females with an enlarged brood had lower red blood cell resistance than females with control and reduced broods. However, for both sexes, there was no relationship between the level of parasitaemia and resistance to oxidative stress, suggesting a twofold cost of reproduction. Our results thus suggest the presence of two proximate and independent mechanisms for the well-documented trade-off between current reproductive effort and parental survival.

scholarly journals Parental genetic similarity and offspring performance in blue tits in relation to brood size manipulation

2019 ◽  
Vol 9 (18) ◽  
pp. 10085-10091
Author(s):  
Aneta Arct ◽  
Szymon M. Drobniak ◽  
Samantha Mellinger ◽  
Lars Gustafsson ◽  
Mariusz Cichoń
Keyword(s):  
Genetic Similarity ◽  
Brood Size ◽  
Offspring Performance ◽  
Brood Size Manipulation ◽  
Blue Tits

Stress, immunocompetence and leukocyte profiles of pied flycatchers in relation to brood size manipulation

Oecologia ◽  
2003 ◽  
Vol 136 (1) ◽  
pp. 148-154 ◽  
Author(s):  
Petteri Ilmonen ◽  
Dennis Hasselquist ◽  
�sa Langefors ◽  
J�rgen Wiehn
Keyword(s):  
Brood Size ◽  
Brood Size Manipulation ◽  
Leukocyte Profiles

Experimentally altered plumage brightness of female tree swallows: a test of the differential allocation hypothesis

Behaviour ◽  
2016 ◽  
Vol 153 (5) ◽  
pp. 525-550 ◽  
Author(s):  
Lisha L. Berzins ◽  
Russell D. Dawson
Keyword(s):  
Parental Care ◽  
Brood Size ◽  
Tachycineta Bicolor ◽  
Differential Allocation ◽  
Tree Swallows ◽  
Agonistic Interactions ◽  
Brood Size Manipulation ◽  
Fledging Success ◽  
Female Attractiveness ◽  
Female Tree

The differential allocation hypothesis posits that individuals should invest in the current reproductive attempt according to the attractiveness of their mate, but studies of allocation by males when female traits are manipulated to be more attractive are lacking. In the current study, we experimentally enhanced and reduced the plumage brightness of female tree swallows (Tachycineta bicolor) relative to controls to examine whether males adjust investment in parental care according to female attractiveness, while simultaneously performing a brood size manipulation. Contrary to our predictions, we found no evidence that males provisioned nestlings according to the plumage brightness of females. However, we found that nestling quality and fledging success were lowest when female plumage brightness was reduced and brood size was enlarged. This may be due to the plumage brightness treatment influencing agonistic interactions with other females, and may suggest that plumage brightness is a signal assessed by females.

scholarly journals Effect of sibling competition and male carotenoid supply on offspring condition and oxidative stress

2010 ◽  
Vol 21 (6) ◽  
pp. 1271-1277 ◽  
Author(s):  
Sylvain Losdat ◽  
Fabrice Helfenstein ◽  
Benoît Gaude ◽  
Heinz Richner
Keyword(s):  
Oxidative Stress ◽  
Sibling Competition ◽  
And Oxidative Stress

scholarly journals Impact of different rearing systems on growth, carcass traits, oxidative stress biomarkers, and humoral immunity of broilers exposed to heat stress

2020 ◽  
Vol 99 (6) ◽  
pp. 3070-3078 ◽  
Author(s):  
Mahmoud M. Abo Ghanima ◽  
Mohamed E. Abd El-Hack ◽  
Sarah I. Othman ◽  
Ayman E. Taha ◽  
Ahmed A. Allam ◽  
...  
Keyword(s):  
Oxidative Stress ◽  
Heat Stress ◽  
Humoral Immunity ◽  
Carcass Traits ◽  
Oxidative Stress Biomarkers ◽  
Stress Biomarkers
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