Publication Type: | Journal Article |
Year of Publication: | 2002 |
Authors: | Nuechterlein, GL, Buitron, D |
Journal: | Waterbirds |
Volume: | 25 |
Issue: | 4 |
Date Published: | 2002 |
ISBN Number: | 1524-4695 |
Keywords: | Podiceps, Podiceps grisegena, Podicipedidae |
Abstract: | Abstract Miniaturized temperature loggers placed in Red-necked Grebe (Podiceps grisegina) nests revealed that 16 of the 32 monitored pairs abandoned their nests for extended periods lasting 3-9 h during at least two of the three nights that they were monitored. When incubating pairs left their nests unattended, temperatures of the thermistored egg usually dropped precipitously to below 30°C within 15-25 min. Duration of a pair?s incubation period was positively associated with the number of minutes that the thermistored egg was below 30°C in our 3-day samples, yet nesting success remained high. Embryos appeared to be tolerant of this cooling; 26 of the 32 monitored nests hatched young, and there was no detectable increase in the failure of eggs to hatch for pairs neglecting their clutches more than 3 h per night. We suggest Red-necked Grebes preemptively leave their nests at night to avoid predation on their eggs or themselves.Abstract Miniaturized temperature loggers placed in Red-necked Grebe (Podiceps grisegina) nests revealed that 16 of the 32 monitored pairs abandoned their nests for extended periods lasting 3-9 h during at least two of the three nights that they were monitored. When incubating pairs left their nests unattended, temperatures of the thermistored egg usually dropped precipitously to below 30°C within 15-25 min. Duration of a pair?s incubation period was positively associated with the number of minutes that the thermistored egg was below 30°C in our 3-day samples, yet nesting success remained high. Embryos appeared to be tolerant of this cooling; 26 of the 32 monitored nests hatched young, and there was no detectable increase in the failure of eggs to hatch for pairs neglecting their clutches more than 3 h per night. We suggest Red-necked Grebes preemptively leave their nests at night to avoid predation on their eggs or themselves. |
URL: | http://dx.doi.org/10.1675/1524-4695(2002)025[0485:NENAPI]2.0.CO;2 |
Short Title: | Waterbirds |
Taxonomic name: