When helpers were present, however, mother wrens laid smaller eggs that had reduced nutritional content and produced smaller chicks.
Dufva (1996) [54], for example, showed that female great tits (Parus major) infected with Trypanosoma blood parasites laid smaller eggs than non-infected females.
HD females also laid smaller eggs in the first clutch and larger eggs in the second clutch, but they kept clutch size constant between the two successive clutches (Table 1).
This phenomenon may explain why, in our experiment, the females that had not fed on a male laid smaller egg sacs despite having large amounts of alternative prey in the enclosures (see Methods).
Data of these two groups showed that HD females laid smaller eggs than did GH females (one-way ANOVA; 1st clutch-F1, 83 = 32.39, 2nd clutch-F1, 83 = 63.63, both p<0.0001), but they did not differ from GH females of the same SVL in clutch size (one-way ANCOVA with SVL as the covariate; 1st clutch-F1, 82 = 0.02, 2nd clutch-F1, 82 = 0.25, both p>0.620), in each of the two successive clutches.
Thus, when aided by helpers, females laid smaller eggs in poor acorn years and larger eggs in good acorn years (Fig. 1).
She ended by laying small, cool silken pillows filled with fragrant flaxseed over our closed eyes.
However, documents released under freedom of information rules reveal the company privately later sought and won permission from authorities to survey those areas, which involves laying small explosive charges underground.
To start composting, the Virginia Cooperative Extension Service suggests laying small twigs or chopped corn stalks down first to aid in aeration and drainage.
