15 research outputs found
Bedrohungslage des Östlichen Hulocks (Hoolock leuconedys) und Identifikation möglicher Schutzmassnahmen im Bezirk Yingjiang in West-Yunnan, China
Full text linkA trade-off between reproductive investment and maternal cerebellum size in a precocial bird
Full text linkNatural selection favours increased investment in reproduction, yet considerable variation in parental investment is observed in natural populations. Life-history theory predicts that this variation is maintained by a trade-off between the benefits of increased reproductive investment and its associated costs for the parents. The nature of these costs of reproduction, however, remains poorly understood. The brain is an energetically highly expensive organ and increased reproductive investment may, therefore, negatively affect brain maintenance. Using artificial selection lines for high and low prenatal maternal investment in a precocial bird, the Japanese quail (Coturnix japonica), we provide experimental evidence for this hypothesis by showing that increased prenatal provisioning negatively affects the size of a particular brain region of the mother, the cerebellum. Our finding suggests that cognitive demands may constrain the evolution of parental investment, and vice versa, contributing to the maintenance of variation in reproductive behaviour in animal populations
Beurteilung von Randeffekten auf die Populationsstruktur und die Qualität der bevorzugten Futterpflanzen des Westlichen Hulocks (Hoolock hoolock) im Namdapha Nationalpark in Indien
Full text linkPopulationsbeurteilung des Weissbartgibbons (Hylobates albibarbis) in Kalimantan, Indonesien
Full text linkPopulationsbeurteilung des Weissbartgibbons (Hylobates albibarbis) in Kalimantan, Indonesien
Full text linkSchutz des Carpenter-Weisshandgibbons (Hylobates lar carpenter) durch Einbeziehen der Bevölkerung
Full text linkBeurteilung von Randeffekten auf die Populationsstruktur und die Qualität der bevorzugten Futterpflanzen des Westlichen Hulocks (Hoolock hoolock) im Namdapha Nationalpark in Indien
Full text linkBedrohungslage des Östlichen Hulocks (Hoolock leuconedys) und Identifikation möglicher Schutzmassnahmen im Bezirk Yingjiang in West-Yunnan, China
Full text linkData from: A trade-off between reproductive investment and maternal cerebellum size in a precocial bird
No full textNatural selection favours increased investment in reproduction, yet considerable variation in parental investment is observed in natural populations. Life-history theory predicts that this variation is maintained by a trade-off between the benefits of increased reproductive investment and its associated costs for the parents. The nature of these costs of reproduction, however, remains poorly understood. The brain is an energetically highly expensive organ and increased reproductive investment may, therefore, negatively affect brain maintenance. Using artificial selection lines for high and low prenatal maternal investment in a precocial bird, the Japanese quail (Coturnix japonica), we provide experimental evidence for this hypothesis by showing that increased prenatal provisioning negatively affects the size of a particular brain region of the mother, the cerebellum. Our finding suggests that cognitive demands may constrain the evolution of parental investment, and vice versa, contributing to the maintenance of variation in reproductive behaviour in animal populations
