Female hooded merganser body mass during nesting

Article Abstract:

A study was conducted to examine the body mass of female hooded mergansers that are nesting in highly distributed and newly constructed wooden nest boxes. Results found that the media body mass was 635 g. at the time of egg laying. During incubation, mass differed among years although it dropped monotonically at an identical rate annually. Body mass dropped by 5.7% to 6.0% between the onset and the end of incubation. Females with the biggest body mass were not necessarily the first to start nesting but incubated the largest clutches and hatched the most young.

Physiological aspects, Body size, Body weights and measures, Waterfowl, Nest building

---

Does male-like coloration of female hooded warblers increase nest predation?

Article Abstract:

A study tests the hypothesis that the risk of nest predation in the female hooded warbler species is increased due to the female's male-like coloration. The sexually dimorphic songbirds have different black hoods, which could be non-existent in yearlings or almost totally black in some older female warblers. The nest predation frequency did not change much with the extent of male-like plummage during the various nest stages. Results show that predators do not locate nests by relying on plumage coloration.

Predation (Biology), Dimorphism (Animals), Dimorphism (Biology), Color of birds, Bird coloration

---

Common goldeneye nest attendance patterns

Article Abstract:

A study on avian biology attempted to establish nest attendance patterns of common goldeneyes that inhabit the regions surrounding three lakes in Minnesota. The data, taken from 1982-1985, were derived from 22 nests that were monitored for 545 days. Hens were found to stay longer at the nests and stay overnight more often when incubation time was at hand. The results minimally deviated from M.L. Mallory and P.J. Weatherhead's Ontario research because a different analytical method was used.

Natural history, Minnesota

Similar abstracts:

• Abstracts: Unreduced gametes and neopolyploids in natural populations of Achillea borealis (Asteraceae). The evolving story of oral polio vaccines.
• Abstracts: Gene cloning, transcriptional analysis, purification, and characterization of phenolic acid decarboxylase from Bacillus subtilis
• Abstracts: The order of expression of transcription factors directs hierarchical specification of hematopoietic lineages
• Abstracts: Biological divergence and equality during the first millennium BC in human populations of central Italy
• Abstracts: Growth cones of dorsal root ganglion but not retina collapse and avoid oligodendrocytes in culture. Decreased expression of pro-apoptotic Bcl-2 family members during retinal development and differential sensitivity to cell death

This website is not affiliated with document authors or copyright owners. This page is provided for informational purposes only. Unintentional errors are possible.