Summary
The regression of egg mass of Passeriformes against female body mass (n=1244) and basal metabolic rate of Passeriformes against body mass (n=159) have similar slopes, indicating that for this group egg mass is directly proportional to basal metabolic rate and that the relative egg mass (% of body mass) is directly proportional to the weight-specific metabolism. This relationship and the average caloric density of passerine eggs (n=38) provides an estimate of the cost of egg production, which for single eggs is 41 % of the basal metabolic rate.
Zusammenfassung
Die Regressionsgeraden von Eigewichten der Passeriformes und weiblicher Körpergewichte (N=1244) einerseits sowie von Ruheumsatz und Körpergewichten (N=159) andererseits haben vergleichbare Steigungen. Das bedeutet, (1) daß für diese Vogelordnung das Eigewicht proportional zum Ruheumsatz und (2) daß das relative Eigewicht (% des Körpergewichtes) proportional zum gewichtspezifischen Stoffwechsel ist. Dieses Verhältnis und der durchschnittliche kalorische Wert der Eier (N=38) erlauben die Kosten der Eiproduktion zu schätzen: sie betragen für das einzelne Ei 41 % des Ruheumsatzes.
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Rahn, H., Sotherland, P.R. & Paganelli, C.V. Interrelationships between egg mass and adult body mass and metabolism among passerine birds. J Ornithol 126, 263–271 (1985). https://doi.org/10.1007/BF01640368
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DOI: https://doi.org/10.1007/BF01640368