caa a22 4500 465782663 CHVBK 20180323111959.0 cr unu---uuuuu 170327e19900901xx s 000 0 eng 10.1007/BF00180305 doi (NATIONALLICENCE)springer-10.1007/BF00180305 Pugesek Bruce College of Health and Human Development, The Pennsylvania State University, S-210 Henderson Building, 16802, University Park, PA, USA aut Parental effort in the California gull: tests of parent-offspring conflict theory [Elektronische Daten] [Bruce Pugesek] Summary: Parental effort was studied among knownaged California gulls (Larus californicus) with a brood size of two. Results supported three of Triver's predictions from parent-offspring conflict theory. First, the amount of time parents withheld food from offspring increased with increasing offspring age. Second, older parents were less likely than younger parents to withhold food from offspring throughout the period of parental care. Third, older parents had a longer period of parental care compared to younger parents. Adult survival to future breeding seasons was inversely related to duration of parental care. Older parents, in association with their greater levels of parental effort, had a lower survival rate compared to that of younger parents. Springer-Verlag, 1990 Behavioral Ecology and Sociobiology Springer-Verlag 27/3(1990-09-01), 211-215 0340-5443 27:3<211 1990 27 265 https://doi.org/10.1007/BF00180305 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00180305 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Pugesek Bruce College of Health and Human Development, The Pennsylvania State University, S-210 Henderson Building, 16802, University Park, PA, USA aut NATIONALLICENCE 773 0- Behavioral Ecology and Sociobiology Springer-Verlag 27/3(1990-09-01), 211-215 0340-5443 27:3<211 1990 27 265 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer