Abstract
Male and female parents had similar roles during incubation, although in the first ten days females incubated more than males. In 36% of pairs one partner incubated significantly more than the other, but more equitable pairs did not have a higher hatching success. Pairs hatching more eggs spent a higher percentage of time for incubation. During chick-feeding, males and females had similar nest visit frequencies. These frequencies were constant in the first month but then declined close to fledging. Pairs raising more chicks had higher feeding rates, but each chick received the same amount of food as chicks in smaller broods. The higher the pair effort, the higher the breeding success, but more equitable pairs did not have a higher reproductive success. Data are in line with a model of optimal parental investment in biparental species, where a lower effort of a member of the pair is compensated by higher involvement of the partner. -from Authors
Lingua originale | Inglese |
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pagine (da-a) | 203-210 |
Numero di pagine | 8 |
Rivista | Vogelwarte |
Volume | 36 |
Numero di pubblicazione | 3 |
Stato di pubblicazione | Pubblicato - 1992 |
Pubblicato esternamente | Sì |