The Crested Penguins

Warham, John

doi:10.1007/978-1-349-02270-0_10

Cited by 102 publications

(63 citation statements)

References 31 publications

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“…Over their annual cycle, penguin mates seem to spend only limited time together. During the breeding period, colonybased observations ( [6]; authors' personal observations from the 2006-2013 breeding seasons) indicate that partners reunite for approximately 20-30 days (day and night) from courtship to egg laying periods, approximately 2-3 days during the incubation, and at night only during chick-rearing (over approx. 70 days).…”

Section: Discussionmentioning

confidence: 99%

Mates but not sexes differ in migratory niche in a monogamous penguin species

et al. 2015

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allée du 6 août, 4000 Liège, Belgium Strong pair bonds generally increase fitness in monogamous organisms, but may also underlie the risk of hampering it when re-pairing fails after the winter season. We investigated whether partners would either maintain contact or offset this risk by exploiting sex-specific favourable niches during winter in a migratory monogamous seabird, the southern rockhopper penguin Eudyptes chrysocome. Using light-based geolocation, we show that although the spatial distribution of both sexes largely overlapped, pair-wise mates were located on average 595 + 260 km (and up to 2500 km) apart during winter. Stable isotope data also indicated a marked overlap between sex-specific isotopic niches (d C values) within pairs. Importantly, the tracked females remained longer (12 days) at sea than males, but all re-mated with their previous partners after winter. Our study provides multiple evidence that migratory species may well demonstrate pair-wise segregation even in the absence of sex-specific winter niches (spatial and isotopic). We suggest that dispersive migration patterns with sex-biased timings may be a sufficient proximal cause for generating such a situation in migratory animals.

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Section: Discussionmentioning

confidence: 99%

Mates but not sexes differ in migratory niche in a monogamous penguin species

et al. 2015

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“…They continue to incubate the small egg only if the big one fails to hatch. This is probably an adaptation to the high frequency of unfertilized eggs or other causes of loss of eggs (aggression [967]), which occurs in this species.…”

Section: Embryonic Growthmentioning

confidence: 95%

“…Crested penguins, Eudyptes, are known for egg dimorphism [967]; see Figure 3.17. They first lay a small egg and, some days later a 1.5 times bigger one.…”

Section: Embryonic Growthmentioning

confidence: 99%

Dynamic Energy and Mass Budgets in Biological Systems

Kooijman

2000

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second editionDynamic Energy Budget theory unifies the commonalities between organisms as prescribed by the implications of energetics, which link different levels of biological organization (cells, organisms and populations). The theory presents simple mechanistic rules that describe the uptake and use of energy and nutrients and the consequences for physiological organization throughout an organism's life cycle, including the relationships between energetics and aging and the effects of toxicants. In this new edition, the theory is broadened to encompass the fluxes of both energy and mass. All living organisms are now covered in a single quantitative framework, the predictions of which are tested against a wide variety of experimental results at the various levels of biological organization. The theory explains many general observations, such as the body size scaling relationships of certain physiological traits, and provides a theoretical basis for the widely used method of indirect calorimetry. In each case, the theory is developed in elementary mathematical terms, but a more detailed discussion of the methodological aspects of mathematical modelling is also included, making the book suitable for biologists and mathematicians with a broad interest in both fundamental and applied quantitative problems in biology.Bas Kooijman is Professor of Applied Theoretical Biology at the Vrije Universiteit in Amsterdam and is also head of the University's Department of Theoretical Biology. His research focuses on mathematical biology, in particular ecotoxicology which provided the framework for the original version of his Dynamic Energy Budget theory published in 1993 (Dynamic Energy Budgets in Biological Systems -Theory and Applications in Ecotoxicology). From the first edition:"This book is an excellent scientific product that informs and forces contemplation of issues relating to population and community ecology. The author has made a complex subject coherent." Thomas G. Hallam, Bulletin of Mathematical Biology "... a very useful and general tool to select more ecologically sound process equations and parameters in ecological models." Sven Erik Jørgensen, Ecological Modelling "The author has made a significant contribution to the problem of modelling the dynamics of biological populations at the level of the individual by synthesizing this very complicated subject into a relatively short list of general assumptions and putting the energetics of sub-models for vital rates on a solid basis." Jim Cushing, Mathematical Biosciences "The family of idealized models offered in this book is capable of playing a role analogous to that of Lotka-Volterra models in population dynamics ... I am confident that any model(s) capable of occupying this niche will be strongly influenced by the ideas in this book." Roger Nisbet, Ecology 9 LIVING TOGETHER Interaction between organisms: The spectrum from competition to preypredator systems. Evaluation of the consequences of the DEB model for population dynamics, food chains, and communities....

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“…Neither of the partners was measured and the body measurements collected are ambiguous. The breeding hybrid may be a male and the non-breeder a female, based on bill measurements (Warham 1975) and the two hybrids are more similar to Macaroni than Rockhopper Penguins in measurements.…”

Section: Discussionmentioning

confidence: 99%

“…That such mixed species pairs are successful in fledging a chick is surprising, since each species has a strictly defined timetable of breeding events (Warham 1975) and it could be expected that the differences between species' timetables would result in the failure of the nesting effort. Our data are insufficient to determine the cause of the nest failures observed.…”

Section: Discussionmentioning

confidence: 99%