The Physiology of Life History Trade-Offs in Animals

Zera, Anthony J.; Harshman, Lawrence G.

doi:10.1146/annurev.ecolsys.32.081501.114006

Cited by 1,296 publications

(1,305 citation statements)

References 213 publications

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“…Finally, testosterone may suppress immune function (Greives et al, 2006;Martin et al, 2008), either directly or indirectly by influencing the secretion of other hormones (Owen-Ashley et al, 2004;Poiani et al, 2000). This immunosuppressive effect, albeit not universal (Wingfield et al, 2001;Roberts et al, 2004), has led many to regard testosterone as a key mechanism underlying the trade-off between reproductive effort and survival (Folstad and Karter, 1992;Sheldon and Verhulst, 1996;Zera and Harshman, 2001;Hau, 2007).…”

Section: Introductionmentioning

confidence: 99%

Seasonal and population variation in male testosterone levels in breeding orange-crowned warblers (Vermivora celata)

Horton

Yoon

Ghalambor

et al. 2010

General and Comparative Endocrinology

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Section: Introductionmentioning

confidence: 99%

Seasonal and population variation in male testosterone levels in breeding orange-crowned warblers (Vermivora celata)

Horton

Yoon

Ghalambor

et al. 2010

General and Comparative Endocrinology

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“…During the last decade, physiological measurements have been increasingly used to provide insights into evolutionary and ecological questions (Zera and Harshman 2001;Ricklefs and Wikelski 2002;Wingfield et al 2008;Angelier and Chastel 2009). These interdisciplinary approaches usually require the collection of tissues from wild organisms in order to obtain physiological measures.…”

Section: Introductionmentioning

confidence: 99%

Capture and blood sampling do not affect foraging behaviour, breeding success and return rate of a large seabird: the black-browed albatross

2010

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During the last decades, eco-physiological studies have usually relied on the collection of blood from wild organisms in order to obtain relevant physiological measures. However, accurate estimates of the impact of capture and blood collection on performances of Polar seabird species have rarely been conducted. We investigated for the first time the effects of a blood sampling process on subsequent foraging behaviour, reproductive performance and return rate of black-browed albatrosses (Thalassarche melanophris) at Kerguelen Islands. We did not find any evidence that the blood sampling process as conducted in our study had detrimental effects on the breeding or foraging strategies or performance of blackbrowed albatrosses. Because blood collection can be performed in several different ways, we recommend that eco-physiologists conduct pilot studies to test whether their blood sampling process affects the performances of their study species.

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“…An important component of life-history study has been focused on understanding the physiological mechanisms that underlie trade-offs (Zera and Harshman, 2001;Ricklefs and Wikelski, 2002). Within this context, endocrine systems are of special interest because of the importance of hormones in orchestrating behavioral and physiological shifts between life-history stages and in structuring individual variation in investment (e.g., survival versus reproduction) within stages (Ketterson and Nolan, 1992;Finch and Rose, 1995).…”

Section: Introductionmentioning

confidence: 99%

Individual variation in baseline and stress-induced corticosterone and prolactin levels predicts parental effort by nesting mourning doves

Miller

Vleck

Otis

2009

Hormones and Behavior

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Endocrine systems have an important mechanistic role in structuring life-history trade-offs. During breeding, individual variation in prolactin (PRL) and corticosterone (CORT) levels affects behavioral and physiological processes that drive trade-offs between reproduction and self-maintenance. We examined patterns in baseline (BL) and stress induced (SI; level following a standard capture-restraint protocol) levels of PRL and CORT for breeding mourning doves (Zenaida macroura). We determined whether the relationship of adult condition and parental effort to hormone levels in wild birds was consistent with life-history predictions. Both BL PRL and BL CORT level in adults were positively related to nestling weight at early nestling ages, consistent with the prediction of a positive relationship of hormone levels to current parental effort of adults and associated increased energy demand. Results are consistent with the two hormones acting together at baseline levels to limit negative effects of CORT on reproduction while maintaining beneficial effects such as increased foraging for nestling feeding. Our data did not support predictions that SI responses would vary in response to nestling or adult condition. The magnitude of CORT response in the parents to our capture-restraint protocol was negatively correlated with subsequent parental effort. Average nestling weights for adults with the highest SI CORT response were on average 10-15% lighter than expected for their age in follow-up visits after the stress event. Our results demonstrated a relationship between individual hormone levels and within population variation in parental effort and suggested that hormonal control plays an important role in structuring reproductive decisions for mourning doves. RightsWorks produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted. Endocrine systems have an important mechanistic role in structuring life-history trade-offs. During breeding, individual variation in prolactin (PRL) and corticosterone (CORT) levels affects behavioral and physiological processes that drive trade-offs between reproduction and self-maintenance. We examined patterns in baseline (BL) and stress induced (SI; level following a standard capture-restraint protocol) levels of PRL and CORT for breeding mourning doves (Zenaida macroura). We determined whether the relationship of adult condition and parental effort to hormone levels in wild birds was consistent with life-history predictions. Both BL PRL and BL CORT level in adults were positively related to nestling weight at early nestling ages, consistent with the prediction of a positive relationship of hormone levels to current parental effort of adults and associated increased energy demand. Results are consistent with the two hormones acting together at baseline levels to limit negative effects of CORT on reproduction while maintaining beneficial effects such as increased foraging for nestli...

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The Physiology of Life History Trade-Offs in Animals

Cited by 1,296 publications

References 213 publications

Seasonal and population variation in male testosterone levels in breeding orange-crowned warblers (Vermivora celata)

Seasonal and population variation in male testosterone levels in breeding orange-crowned warblers (Vermivora celata)

Capture and blood sampling do not affect foraging behaviour, breeding success and return rate of a large seabird: the black-browed albatross

Individual variation in baseline and stress-induced corticosterone and prolactin levels predicts parental effort by nesting mourning doves

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