The physiology/life-history nexus

Ricklefs, Robert E.; Wikelski, Martin

doi:10.1016/s0169-5347(02)02578-8

Cited by 1,338 publications

(1,287 citation statements)

References 41 publications

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“…Indeed, the life histories of these warblers vary along a gradient known as the slow-fast life history continuum (Ricklefs and Wikelski, 2002). Catalina birds have higher return rates, smaller clutch sizes, and higher nest predation rates than do Alaska birds.…”

Section: Study Speciesmentioning

confidence: 99%

“…Hormones are hypothesized to provide a mechanistic basis for life history variation in vertebrates (Sinervo and Svensson, 1998;Ricklefs and Wikelski, 2002;Ketterson and Nolan, 1999;Hau, 2007). In particular, the steroid hormone testosterone is regarded as a prime mediator of life history trade-offs between parental care and mating effort, or between reproduction and survival Wingfield et al, 2001;Hau, 2007).…”

Section: Introductionmentioning

confidence: 99%

“…The behavioral and physiological effects of testosterone in male birds have been well studied, as have avian life histories. Thus, birds provide model systems for studying testosterone's role in mediating life history differences (Ricklefs and Wikelski, 2002). During the breeding season, high plasma testosterone concentrations facilitate mating effort in male birds by promoting singing (Silverin, 1980;, courtship (Endstrom et al, 1997;Fusani, 2008), territorial aggression (Beletsky et al, 1995;Wingfield et al, 2000), mate guarding (Moore, 1984;Saino and MØller, 1995), and pursuit of extra-pair matings Chandler et al, 1994;Raouf et al, 1997).…”

Section: Introductionmentioning

confidence: 99%

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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: Study Speciesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

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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“…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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“…At the same time, analytical methods for generating demographic parameter estimates have improved and increased in sophistication (Halstead, Wylie, Coates, Valcarcel, & Casazza, 2012; White & Burnham, 1999). Consequently, demographic parameter estimates are becoming available for a widening range of taxa (Mesquita et al., 2015; Salguero‐Gómez et al., 2015, 2016), offering the possibility of improved interpretation and generalization, including evaluations of r ‐ K , slow‐fast, and pace‐of‐life syndromes (Bielby et al., 2007; Dunham, Miles, & Reznick, 1988; Gaillard et al., 1989, 2005; Gangloff et al., 2017; Hille & Cooper, 2015; Réale et al., 2010; Ricklefs & Wikelski, 2002; Wiersma, Muñoz‐Garcia, Walker, & Williams, 2007) and niche classification (Pianka, Vitt, Pelegrin, Fitzgerald, & Winemiller, 2017; Winemiller, Fitzgerald, Bower, & Pianka, 2015). …”

Section: Introductionmentioning

confidence: 99%

Sunning themselves in heaps, knots, and snarls: The extraordinary abundance and demography of island watersnakes

King

Stanford²,

Jones

2018

Ecology and Evolution

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Snakes represent a sizable fraction of vertebrate biodiversity, but until recently, data on their demography have been sparse. Consequently, generalizations regarding patterns of variation are weak and the potential for population projections is limited. We address this information gap through an analysis of spatial and temporal variation in demography (population size, annual survival, and realized population growth) of the Lake Erie Watersnake, Nerodia sipedon insularum, and a review of snake survival more generally. Our study spans a period during which the Lake Erie Watersnake was listed as threatened under the U.S. Endangered Species Act, recovered, and was delisted. We collected capture–mark–recapture data at 14 study sites over 20 years, accruing 20,000 captures of 13,800 individually marked adults. Lake Erie Watersnakes achieve extraordinary abundance, averaging 520 adults per km of shoreline (ca. 260 adult per ha) at our study sites (range = 160–1,600 adults per km; ca. 80–800 adults per ha) and surpassing population recovery and postdelisting monitoring criteria. Annual survival averages 0.68 among adult females and 0.76 among adult males, varies among sites, and is positively correlated with body size among study sites. Temporal process variance in annual survival is low, averaging 0.0011 or less than 4% of total variance; thus, stochasticity in annual survival may be of minor significance to snake extinction risk. Estimates of realized population growth indicate that population size has been stable or increasing over the course of our study. More generally, snake annual survival overlaps broadly across continents, climate zones, families, subfamilies, reproductive modes, body size categories, maturation categories, and parity categories. Differences in survival in relation to size, parity, and maturation are in the directions predicted by life history theory but are of small magnitude with much variation around median values. Overall, annual survival appears to be quite plastic, varying with food availability, habitat quality, and other ecological variables.

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The physiology/life-history nexus

Cited by 1,338 publications

References 41 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)

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

Sunning themselves in heaps, knots, and snarls: The extraordinary abundance and demography of island watersnakes

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