Hatching asynchrony and survival of insurance offspring in an obligate brood reducing species, the American white pelican

1996 ◽  
Vol 39 (3) ◽  
pp. 203-209 ◽  
Author(s):  
Roger M. Evans
Keyword(s):  
Hatching Asynchrony ◽  
American White Pelican

scholarly journals Introduction: Biology and Conservation of the American White Pelican

Waterbirds ◽  
2005 ◽  
Vol 28 (sp1) ◽  
pp. 1-8 ◽  
Author(s):  
Daniel W. Anderson ◽  
D. Tommy King
Keyword(s):  
American White Pelican

scholarly journals Minutes matter: brief hatching asynchrony adversely affects late-hatched hihi nestlings, but not life beyond the nest

2016 ◽  
Vol 119 ◽  
pp. 111-118 ◽  
Author(s):  
Kirsty J. MacLeod ◽  
Patricia Brekke ◽  
John G. Ewen ◽  
Rose Thorogood
Keyword(s):  
Hatching Asynchrony

Hatching asynchrony and maternal androgens in egg yolks of House Wrens

2001 ◽  
Vol 32 (1) ◽  
pp. 26-30 ◽  
Author(s):  
Lisa A. Ellis ◽  
David W. Borst ◽  
Charles F. Thompson
Keyword(s):  
Hatching Asynchrony ◽  
House Wrens ◽  
Egg Yolks

scholarly journals Hatching Asynchrony in Oviraptorid Dinosaurs Sheds Light on Their Unique Nesting Biology

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
T -R Yang ◽  
T Engler ◽  
J N Lallensack ◽  
A Samathi ◽  
M Makowska ◽  
...  
Keyword(s):  
Reproductive Biology ◽  
Late Cretaceous ◽  
Fossil Record ◽  
Research Topic ◽  
Hatching Asynchrony ◽  
Jiangxi Province ◽  
Nesting Biology ◽  
Tomographic Images ◽  
Communal Nesting ◽  
Nesting Behaviors

Synopsis Dinosaur nesting biology has been an intriguing research topic, though dinosaur behaviors were relatively less illuminated because of the constraints of the fossil record. For instance, hatching asynchrony, where eggs in a single clutch hatch at different times, is unique to modern neoavian birds but was also suggested to be present in oviraptorid dinosaurs based on a possible partial clutch of four embryo-containing eggs from Mongolia. Unfortunately, unequivocal evidence for the origination of these eggs from a single clutch is lacking. Here we report a new, better preserved partial oviraptorid clutch with three embryo-containing eggs—a single egg (Egg I) and a pair (Egg II/III)—from the Late Cretaceous Nanxiong Group of Jiangxi Province, China. Geopetal features indicate that the pair of eggs was laid prior to the single egg. Neutron tomographic images in combination with osteological features indicate that the embryo of the single egg is less developed than those of the paired eggs. Eggshell histology suggests that the embryo-induced erosion in the paired eggs is markedly more pronounced than in the single egg, providing a new line of evidence for hatching asynchrony. The inferred hatching asynchrony in combination with previously surmised thermoregulatory incubation and communal nesting behaviors very likely suggests that oviraptorid dinosaurs presented a unique reproductive biology lacking modern analogs, which is contrary to the predominant view that their reproductive biology was intermediate between that of modern crocodiles and birds.

HATCHING ASYNCHRONY IN ALTRICIAL BIRDS

1990 ◽  
Vol 65 (4) ◽  
pp. 587-622 ◽  
Author(s):  
ROBERT D. MAGRATH
Keyword(s):  
Hatching Asynchrony ◽  
Altricial Birds
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