Sentence examples for nest mass from inspiring English sources
If a material constituted ≥1% of the average nest mass for a location, it was grouped in its own category; all materials with masses <1% of the average nest mass were categorized as miscellaneous material.
In addition to nest mass, we measured five aspects of nest morphology: 1) external nest diameter, 2) internal nest-cup diameter, 3) external nest depth, 4) internal nest-cup depth, and 5) nest-wall thickness.
To test the hypothesis that nest composition differed between breeding sites, we used Chi-squared tests in R (R version 2.12 [34]) using the proportion that each material contributed to the average nest mass within a location for each species.
To decide if a material should be categorized separately, we compared the average mass of each material to the average total nest mass for each species in each location.
If nest morphologies across species show similar responses to shared selective pressures across our sites (e.g., most species increase nest mass under cold conditions), then we predicted that nests in northern Manitoba would differ in similar ways from nests in southeastern Ontario.
American Robins, Yellow Warblers, and Carduelis finches in northern Manitoba achieved heavier nest masses in different ways.
Nests of American Robins, Yellow Warblers, and Carduelis finches had heavier nest masses, and tended to have thicker nest-walls, in northern Manitoba compared with conspecifics or congenerics breeding in southeastern Ontario.
Nest masses were generally heavier for nests from northern Manitoba than nests from southeastern Ontario (F1 = 11.5, P<0.01, Fig. 3).
At the time the male begins to care for the nest, a mass of vascular filaments (a system of blood vessels) develops as an outgrowth of the pelvic fins.
Coots nest in masses of water plants, laying as many as ten speckled eggs.
