Limited effects of egg size on chick growth in the chinstrap Penguin Pygoscelis antarctica

Belliure, Josabel; Carrascal, Luis M.; Mínguez, Eduardo; Ferrer, Miguel

doi:10.1007/s003000050337

Cited by 6 publications

(4 citation statements)

References 28 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In addition, offspring coming from larger eggs most likely experienced an advantage during the critical first days after hatch compared to offspring coming from smaller eggs. This is because in many species egg size may affect hatchling mass and nestling growth (Williams 1994, Belliure et al 1999, Royle et al 1999, Lipar and Ketterson 2000), and sometimes has persistent effects on nestling fitness traits (Smith and Bruun 1998, Styrsky et al 1999, Hipfner 2000, Styrsky et al 2000). Moreover, the amount and quality of nutrients (i.e.…”

Section: Discussionmentioning

confidence: 99%

Differential maternal investment counteracts for late breeding in magpiesPica pica: an experimental study

Neve¹,

Soler²,

Soler³

et al. 2004

Journal of Avian Biology

View full text Add to dashboard Cite

De Neve, L., Soler, J. J., Soler, M. and Pérez-Contreras, T. 2004. Differential maternal investment counteracts for late breeding in magpies Pica pica : an experimental study. Á/ J. Avian Biol. 35: 237 Á/245.Reproductive success in many avian populations declines throughout the breeding season. Two hypotheses have gained attention to explain such a decline: the ''timing'' hypothesis proposes that deteriorating food availability causes the decline in reproductive success (causal effect of breeding time), whereas the ''quality'' hypothesis proposes that individuals of lower phenotypic quality reproduce at the end of the breeding season, causing the correlation between breeding time and breeding success. We tested both of these hypotheses in a monogamous single breeder, the magpie Pica pica , by experimentally inducing some pairs to lay a replacement clutch, after removal of the first clutch. The first clutch was left in the nest of another magpie pair (matched by laying date and clutch size), and incubated and raised by these foster parents. In this way we obtained two clutches from the same magpie pair with full siblings raised in conditions of the first and second reproductive attempts. High quality pairs (with laying dates in the first half of the breeding season) reached similar breeding success in replacement clutches as compared to first clutches of the same female. In addition, experimental pairs reared significantly more offspring of similar quality in their replacement clutches as compared to late-season first clutches, thereby suggesting that late season first clutches were produced by pairs of lower phenotypic quality. Results indicate that high quality pairs trade-off clutch size for larger eggs in replacement clutches, which could help magpie pairs to partly compensate for poorer environmental conditions associated with a delayed breeding attempt.

show abstract

Section: Discussionmentioning

confidence: 99%

Differential maternal investment counteracts for late breeding in magpiesPica pica: an experimental study

Neve¹,

Soler²,

Soler³

et al. 2004

Journal of Avian Biology

View full text Add to dashboard Cite

show abstract

“…Visual inspection revealed a pair of points, A-and B-eggs of Pygoscelis antarctica, that deviated strongly from an otherwise exceptionally tight linear relationship (data not shown); both eggs were ∼10 g larger than expected from their linear dimensions (A-egg residual p 4.1, Bonferroni ; B-egg P p .0140 residual p 6.4, Bonferroni ). After first confirm-P p .0001 ing that the dimensions reported by Lishman (1985) were likely correct (Belliure et al 1999), we excluded P. antarctica from the regression analysis and estimated A-and B-egg mass for this species also.…”

Section: Appendix a Estimation Of Fresh Egg Mass From Linear Dimensionsmentioning

confidence: 99%

Extreme Intraclutch Egg-Size Dimorphism inEudyptesPenguins, an Evolutionary Response to Clutch-Size Maladaptation

Stein

Williams²

2013

The American Naturalist

View full text Add to dashboard Cite

Eudyptes penguins (six species) are uniquely characterized by a two-egg clutch with extreme intraclutch egg-size dimorphism (ESD): the first-laid A-egg is 17.5%-56.9% smaller than the B-egg. Although A-eggs are viable, they almost never produce fledged chicks (genus average <1%). Using classical life-history theory and phylogenetic comparative methods, we demonstrate a marked slowdown in the life history of Eudyptes: age of first reproduction is 52% later and annual fecundity 48% lower compared with other two-egg clutch penguin species. All six Eudyptes species have retained a two-egg clutch, despite this pronounced life-history slowdown; this suggests evolutionary mismatch between clutch size and chicks fledged per clutch. Consistent with this, we show that Eudyptes fledge 43% fewer chicks per clutch than other two-egg clutch penguin species. Extreme intraclutch ESD in Eudyptes is associated primarily with a uniform (5%) increase in relative B-egg size, and B-egg size has evolved in accord with life history. We further show that intraclutch ESD is positively correlated with age of first reproduction in Eudyptes but not in other two-egg clutch penguin species. We argue that Eudyptes' persistent failure to evolve a one-egg clutch constitutes a unique genus-wide evolutionary maladaptation and that extreme intraclutch ESD evolved as a correlated response to selection favoring a slower life history imposed by their extreme pelagic overwintering and migration ecology.

show abstract

“…Supporting our conclusion, 3 and 4 d asynchronies were rare in control nests. In the genus Pygoscelis , the quality advantage of asynchronous broods over synchronous broods disappears during the later crèche phase (Moreno et al ) and hatching asynchrony was only related to the within‐brood asymmetry at 15 d but not at 45 d of age (Belliure et al ). But, in the Jackass penguin, a congener of our study species, brood asymmetry remains until fledging (Seddon and Van Heezik ).…”

Section: Discussionmentioning

confidence: 99%

“…Level of support 1) In control nests, asynchrony would be larger in 'bad' years None 2) N2 died more than N1 in HA  4, but not in HA  0 Partial 3) N2 of HA  4 died more than N2 of HA  0 None 4) Average nestling mortality is higher in HA  4 than in HA  0 None 5) N2 of HA  4 died before than N2 of HA  0 Partial 6) Nestlings of HA  4 fledge heavier than nestlings of HA  0 Partial crèche phase (Moreno et al 1994) and hatching asynchrony was only related to the within-brood asymmetry at 15 d but not at 45 d of age (Belliure et al 1999). But, in the Jackass penguin, a congener of our study species, brood asymmetry remains until fledging (Seddon and Van Heezik 1991).…”

Section: Predictionmentioning

confidence: 96%

An experimental approach to the brood reduction hypothesis in Magellanic penguins

Barrionuevo

Frere

2017

Journal of Avian Biology

View full text Add to dashboard Cite

In many bird species, eggs in a brood hatch within days of each other, leading to a size asymmetry detrimental to younger siblings. Hatching asynchrony is often thought of as an adaptive strategy, and the most widely studied hypothesis in relation to this is the ‘brood reduction hypothesis’. This hypothesis states that when food resources are unpredictable, hatching asynchrony will allow the adjustment of the brood size maximizing fledging success and benefitting parents. The Magellanic penguin Spheniscus magellanicus is an appropriate species to test this hypothesis because it has a 2‐egg clutch that hatches over a 2‐d interval with a broad range of variation (–1 to 4 d), it shows facultative brood reduction, and food abundance between breeding seasons is variable. We performed a manipulative study at Isla Quiroga, Argentina, during three breeding seasons (2010–2012) by forcing broods to hatch synchronously (0 d) or asynchronously (2 or 4 d). Years were categorized based on estimated food abundance. Our study provided mixed results because in the low estimated food abundance year asynchronous broods did not have higher nestling survival than synchronous broods, and the second‐hatchling in asynchronous broods did not die more often than those in synchronous broods. On the other hand, younger siblings of 4‐d asynchronous broods starved earlier than those of synchronous broods, and 2‐d asynchronous broods fledged heavier young than synchronous broods. Asynchronous hatching would seem to benefit reproduction in this species, not with respect to survival, but in terms of the advantages it can accord to nestlings and, in terms of lower costs, for parents raising nestlings.

show abstract

Limited effects of egg size on chick growth in the chinstrap Penguin Pygoscelis antarctica

Cited by 6 publications

References 28 publications

Differential maternal investment counteracts for late breeding in magpiesPica pica: an experimental study

Differential maternal investment counteracts for late breeding in magpiesPica pica: an experimental study

Extreme Intraclutch Egg-Size Dimorphism inEudyptesPenguins, an Evolutionary Response to Clutch-Size Maladaptation

An experimental approach to the brood reduction hypothesis in Magellanic penguins

Contact Info

Product

Resources

About