The hormonal and behavioral response to group formation, seasonal changes, and restraint stress in the highly social Malayan Flying Fox (Pteropus vampyrus) and the less social Little Golden-mantled Flying Fox (Pteropus pumilus) (Chiroptera: Pteropodidae)

@article{Reeder2006TheHA,
  title={The hormonal and behavioral response to group formation, seasonal changes, and restraint stress in the highly social Malayan Flying Fox (Pteropus vampyrus) and the less social Little Golden-mantled Flying Fox (Pteropus pumilus) (Chiroptera: Pteropodidae)},
  author={D. M. Reeder and Nicole S. Kosteczko and Thomas H. Kunz and Eric P. Widmaier},
  journal={Hormones and Behavior},
  year={2006},
  volume={49},
  pages={484-500}
}

Figures from this paper

Seasonal dynamics of agonistic behavior and hormones in an ex situ all-male colony of large flying foxes.

Seasonal changes in hormones and behavior in an all-male colony of 12 large flying foxes at Disney's Animal Kingdom® are assessed and it is indicated that three agonistic behaviors peaked prior to the increase in testosterone and glucocorticoid hormones measured during the breeding season.

Fit females and fat polygynous males: seasonal body mass changes in the grey-headed flying fox

This work investigated body mass changes in relation to reproductive behaviour in a large colony of grey-headed flying foxes and found that females were predicted to maximise reproductive effort during lactation and males during the breeding season, but male mass followed a pattern akin to the “fatted male phenomenon”.

Testosterone is associated with harem maintenance ability in free-ranging grey-headed flying-foxes, Pteropus poliocephalus

The role of T in harem maintenance in a major mammalian taxon with complex forms of social organization is highlighted, highlighting the need to understand how testosterone levels in reproductive contexts rise to facilitate males' competitive behaviours necessary for meeting social challenges.

Contrasting fecal corticosterone metabolite levels in captive and free-living colonial tuco-tucos (Ctenomys sociabilis).

The first evaluation of GC levels in captive and wild colonial tuco-tucos is provided, indicating that the influence of environmental conditions on stress physiology may have important implications for understanding the social behavior of this species in the laboratory and the field.

Daytime behavior of Pteropus vampyrus in a natural habitat: the driver of viral transmission

The details of the flying fox’s behavior and its interaction with other wildlife in South-East Asia that may help explain how pathogen spillover occurs in the wild are provided.

Baseline levels of faecal glucocorticoid metabolites and indications of chronic stress in the vulnerable grey-headed flying-fox, Pteropus poliocephalus

Additional droppings collected under the urban colony gave similar results to those collected from captured flying-foxes at the same location, and could be a useful non-invasive method for determining the levels of physiological stress in flying- fox colonies.

Characterization of pituitary–adrenocortical activity in the Malayan flying fox (Pteropus vampyrus)

The physiological responsiveness of the pituitary and adrenal glands, along with P. vampyrus’s documented seasonality and range of social behaviors, makes these bats an excellent model for exploring the general physiology of the hypothalamic–pituitary–adrenal and hypothalamic- Pituitary-gonadal axes, as well as social influences on these axes.

Year round plasma leptin and androgen concentrations in a tropical bat

The detailed reproductive patterns and their associated endocrine characteristics have been documented only for a few species of bats. The objective of this study was to examine seasonal changes in

References

SHOWING 1-10 OF 40 REFERENCES

Baseline and stress-induced glucocorticoids during reproduction in the variable flying fox, Pteropus hypomelanus (Chiroptera: Pteropodidae).

There was a continuum in the magnitude of the response to stress over time in females, with the greatest stress response in early pregnancy, a dampened response during late pregnancy, and no significant stress response during lactation, which suggests that being in a breeding group was chronically stressful for males.

Seasonal changes in testicular size, plasma testosterone concentration and body weight in captive flying foxes (Pteropus poliocephalus and P. scapulatus).

Adult male flying foxes Pteropus poliocephalus and P. scapulatus were captured in south-east Queensland and kept in outdoor enclosures and maintained the seasonal reproductive patterns observed in the wild.

Mating-associated peak in plasma testosterone concentration in wild male grey-headed flying foxes (Pteropus poliocephalus).

The large increase in plasma T during the mating season appears to be due to increased testicular production, and testicular T content rose as the breeding season progressed, being greatest during March, coinciding with the large rise in Plasma T concentrations.

Basal, diurnal, and stress-induced levels of glucose and glucocorticoids in captive bats.

The effects of handling and isolation caused a significant increase in both plasma cortisol and glucose levels, which remained relatively constant throughout the day-roosting period and significantly declined to their lowest level in the period following food presentation.

Behavioral and endocrine consequences of heterosexual pair formation in squirrel monkeys

Social influences on circulating levels of cortisol and prolactin in male talapoin monkeys

The "Challenge Hypothesis": Theoretical Implications for Patterns of Testosterone Secretion, Mating Systems, and Breeding Strategies

This model indicates that there may be widely different hormonal responses to male-male and male-female interactions and presumably equally plastic neural mechanisms for the transduction of these signals into endocrine secretions.

Further characterization of the pituitary-adrenocortical responses to stress in Chiroptera.

There was no significant difference in the response to handling in bats tested in the morning or evening, and there was a pronounced diurnal rhythm in glucocorticoid levels in one species (M. lucifigus), in spite of high steroid levels.