Niedrige Ei- und Körpertemperatur („Hypothermie“) bei brütenden Gelbschnabelsturmtauchern (Calonectris diomedea)

Scharlau, W.; Ristow, Dietrich

doi:10.1007/bf01640304

Cited by 4 publications

(2 citation statements)

References 2 publications

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“…Their mean warm-side egg temperatures (30.7-31.1°C) are lower than those of most tubenoses (Warham 1996). Lower central egg temperatures have been reported for incubated eggs of Fork-tailed Storm Petrels (Oceanodroma furcata) (30.2 ± 2.6°C, Boersma 1982), and for Scopoli's Shearwaters (Calonectris diomedea) using dummy eggs (29.6 ± 0.6°C; Wink et al 1987). Low Table 1.…”

Section: Discussionmentioning

confidence: 89%

Surface temperatures of albatross eggs and nests

Boersch‐Supan

Johnson

Phillips

et al. 2017

Emu - Austral Ornithology

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Knowledge of thermal traits is essential for understanding and modelling physiological responses to environmental change. Egg temperatures are poorly studied in most tubenose species. We employed a contactless infrared thermometer to measure egg and nest surface temperatures throughout the incubation period for four albatross species at Bird Island, South Georgia. The observed mean warm-side temperature of 33.4°C for Wandering Albatross (Diomedea exulans) was similar to measurements obtained from this species using dummy eggs elsewhere. Observed mean warm-side temperatures for Black-browed Albatross (Thalassarche melanophris), Greyheaded Albatross (Thalassarche chrysostoma), and Light-mantled Albatross (Phoebetria palpebrata), reported here for the first time, were 30.7-31.5°C, which is lower than the egg temperatures reported for most Procellariiformes. Temperature gradients across viable eggs declined by up to 9°C during incubation, reflecting increased embryonic circulation and metabolic heat production. This suggests that bioenergetic models should not assume constant egg temperatures during embryo development. Non-viable (addled) eggs could be identified by large temperature gradients in late incubation, indicating that infrared thermometry can be used to determine whether the embryo has died or the egg is infertile in monitoring and managed breeding (e.g. translocation) programmes. Egg temperatures were correlated with ground temperatures, indicating that incubated eggs are vulnerable to environmental variability.

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Section: Discussionmentioning

confidence: 89%

Surface temperatures of albatross eggs and nests

Boersch‐Supan

Johnson

Phillips

et al. 2017

Emu - Austral Ornithology

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“…When comparing only polar procellariiforms (N = 4 species), mean egg temperatures vary by 1.6 °C. Including additional measurements for other procellariiforms, regardless of environment, mean egg temperatures range between 29.6 °C for Cory's shearwater (Calonectris diomedea; [54]) and 37.5 °C for Laysan albatross (Phoebastria immutabilis; [26]) and the overall mean egg temperature is 33.4 °C (N = 19 species; calculated from published data [14,20,26,[55][56][57][58][59][60][61]).…”

Section: Egg Temperatures Of Petrels and Other Seabirdsmentioning

confidence: 99%

Comparative egg attendance patterns of incubating polar petrels

et al. 2021

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Background The internal environment of eggs in most birds is regulated by transferring heat energy through contact incubation, maintaining nest microclimate, and frequent egg turning by the incubating parent on its nest. However, we lack information about egg attendance patterns in birds that breed in polar environments where variations in life history are expected to influence incubation behavior. Moreover, crevice/burrow nesting petrels in high-latitude regions are known for periodically leaving their egg unattended (hereafter ‘egg neglect’), but there is little reporting on the internal condition of unattended eggs. At Dumont d’Urville Station, Antarctica, we studied the incubation behavior of 24 snow (Pagodroma nivea) and 15 Cape (Daption capense) petrel pairs using egg loggers that recorded egg turning rates, orientation changes, and temperatures at 1 Hz for durations of 3–6 days. Results Egg turning frequency (1.31 ± 0.33 vs. 1.38 ± 0.39 turns h−1), angle change per turn (43.1 ± 43.2 vs. 48.6 ± 43.7° turn−1), and egg temperature (34.1 ± 2.3 vs. 34.1 ± 2.0 °C) were nearly identical for snow and Cape petrels, respectively. However, egg neglect was only observed in snow petrel nests (based on egg temperature changes) where loggers recorded mean durations of 1.34 ± 1.15 days (maximum duration of 3.63 days). During periods of neglect, eggs cooled to 5.5 ± 1.8 °C over an average of 91 min, but were rewarmed by parents in only 76 min at a rate of 0.33 °C min−1. Conclusions Egg temperatures of both species during regular incubation were within 1–2 °C of other high-latitude petrel species, but neglected snow petrel eggs remained several degrees above freezing, which was likely attributed to crevice nesting where neglected eggs are buffered by environmental conditions. Using egg rewarming rates, thermal capacity of eggs, and published metabolic rates, we estimate egg rewarming costs in snow petrels to be 1.5 to 1.9 × BMR. Excluding egg neglect periods, turning rates for both petrel species were lower than other seabirds studied using biologging devices, which may be associated with the prolonged incubation periods that are characteristic of procellariiform seabirds.

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