Daily estradiol and progesterone levels relative to laying and onset of incubation in canaries.

@article{Sockman1999DailyEA,
  title={Daily estradiol and progesterone levels relative to laying and onset of incubation in canaries.},
  author={Keith W. Sockman and Hubert Schwabl},
  journal={General and comparative endocrinology},
  year={1999},
  volume={114 2},
  pages={
          257-68
        }
}
Female birds may optimize reproduction by modifying clutch size and the timing for the onset of incubation. We measured fecal estradiol-17beta (E) and progesterone (P) in laying canaries to better understand how onset of incubation might regulate clutch size. Both E and P rose sharply to maxima 1 day before the first egg was laid. Thereafter, E steadily declined, but P remained high through 2 days after the first egg was laid, after which both hormones had returned to low levels. Clutch size… 
View on PubMed
unc.edu
56 Citations
Highly Influential Citations
1
Background Citations
27
Methods Citations
4
Results Citations
2

56 Citations

Citation Type

Citation Type

The Role of Prolactin in the Regulation of Clutch Size and Onset of Incubation Behavior in the American Kestrel
TLDR
It is indicated that rising prolactin during laying enhances the expression of incubation behavior in a species that shows hatching asynchrony, consistent with studies on domesticated species that show synchronous hatching.
Individual variation in plasma estradiol-17beta and androgen levels during egg formation in the European starling Sturnus vulgaris: implications for regulation of yolk steroids.
Uncovering the Sex-Specific Endocrine Responses to Reproduction and Parental Care
TLDR
Following nest loss, it is found that both males and females responded to the external cue, and unlike males, this result suggests that reproductive processes were decreasing.
Adaptive sex differences in growth of pre-ovulation oocytes in a passerine bird
TLDR
It is suggested that sex difference in oocyte growth and egg-laying sequence is an adaptive outcome of hormonal constraints imposed by the overlap of early incubation and oogenesis in this population, and that the close integration of maternal incubation, oocytes' sex-determination and growth might be under control of the same hormonal mechanism.
Progesterone Inhibits Female Courtship Behavior in Domestic Canaries (Serinus canaria)
TLDR
It is proposed that progesterone plays a key role in mediating the transition from active female courtship behavior to sexual refractoriness in this species and is consistent with the hypothesis that the decrease in sexual behavior following plasma progester one increase represents an evolutionarily conserved mechanism in the regulation of female sexual behavior.
Patterns of maternal yolk hormones in eastern screech owl eggs (Megascops asio).
  • D. Hahn
  • Biology
    General and comparative endocrinology
  • 2011
Maternal resource variation across the laying sequence in Canada geese Branta canadensis maxima
TLDR
It was found that egg size varied non-linearly across the laying sequence such that first laid eggs were small, the largest eggs in the clutch occurred in the second and third positions, and size declined in eggs laid in subsequent positions.
Fecal sex steroids and reproductive behaviors in harpy eagles (Harpia harpyja).
TLDR
This is the first study to describe in detail endocrine and behavioral data regarding reproduction in tropical eagles, which may serve in the future as a reference to developing breeding programs.
Prenatal maternal effects appear to be insensitive to experimental or natural environmental variation
TLDR
A supplementary feeding experiment was designed, wherein females were provided with food at certain times during the laying phase, consistent with anticipatory maternal effects, and egg characteristics were found to be relatively insensitive to the environmental variation, supporting the experimental results.
Hormone Levels in the Outer Layer of Domestic Goose (Anser Anser Domesticus) Eggs Change Over the Laying Season
TLDR
There was a significant change in the concentration of all three hormones: T and P4 increased in a linear manner across the season whilst A4 increased until mid season and then steadily decreased and the increase in T is consistent with a trade-off for the seasonal decline in egg weight.
...
1
2
3
4
5
...

References

SHOWING 1-10 OF 59 REFERENCES
Plasma concentrations of prolactin during incubation and parental feeding throughout repeated breeding cycles in canaries (Serinus canarius).
TLDR
The results show that prolactin secretion is high not only during incubation but also during the parental feeding phase in an altricial passerine bird.
Environment modifies the testosterone levels of a female bird and its eggs.
  • H. Schwabl
  • Biology
    The Journal of experimental zoology
  • 1996
TLDR
It is concluded that here the authors have a mechanism which communicates environmental conditions from the mother to the offspring, and that this mechanism serves to optimize reproduction and/or modify offspring traits.
Incubation during the egg-laying period in relation to clutch-size and other aspects of reproduction in the Great Tit Parus major
TLDR
Because the mortality of the latest hatched young increases with age difference within broods, selection tends to keep the incubation time in the egg-laying period below a certain 'critical' level (about 1000 minutes).
Hormonal induction of incubation behavior in ovariectomized female turkeys (Meleagris gallopavo).
TLDR
It is suggested that incubation behavior in the female turkey is facilitated by the combined action of estradiol, P, and Prl.
Yolk is a source of maternal testosterone for developing birds.
  • H. Schwabl
  • Biology
    Proceedings of the National Academy of Sciences of the United States of America
  • 1993
TLDR
These findings indicate that female songbirds can bestow upon their eggs a dose of hormone that modifies the behavior of offspring, suggesting that variable doses of these hormones might explain some of the individual variation in offspring behavior.
Incubation Development and Asynchronous Hatching in Junglefowl
TLDR
The development of incubation behaviour, asynchrony of embryo development and of hatching of the precocial nidifugous Junglefowl corresponded to a high degree to what is known of altricial species.
The onset of incubation in birds: can females control hatching patterns?
TLDR
Investigation of intraspecific variation in incubation behaviour of wild Eurasian kestrels in Finland found that patterns of hatching asynchrony could be predicted from patterns of incubation, consistent with the idea that females have much control over hatching patterns.
Changes in plasma concentrations of luteinizing hormone, progesterone, and testosterone in turkey hens during the ovulatory cycle.
TLDR
It was concluded from this study that the patterns of secretion of LH, progesterone, and testosterone were similar in that the preovulatory surge was superimposed on a relatively stable basal level, while the temporal relationships of the ovulatory surges of these hormones were variable.
Plasma concentrations of prolactin during egg laying and incubation in the ruffed grouse (Bonasa umbellus)
TLDR
The plasma concentration of prolactin was measured following experimental photostimulation, during oviposition and during incubation in plasma from ruffed grouse by heterologous double-antibody radioimmunoassay to identify hens that failed to incubate.
The possible role of prolactin in the regulation of nesting behaviour and the secretion of luteinizing hormone in broody bantams.
TLDR
The observations suggest that, in the bantam, the onset of incubation is initiated by an increase in the secretion of prolactin which also suppresses the glandular secretion of LH.
...
1
2
3
4
5
...