caa a22 4500 469074531 CHVBK 20180323132931.0 cr unu---uuuuu 170328e19920201xx s 000 0 eng 10.1007/BF00130032 doi (NATIONALLICENCE)springer-10.1007/BF00130032 Do harlequin Mediterranean environments function as source sink for Blue Tits ( Parus caeruleus L.)? [Elektronische Daten] [Jacques Blondel, Philippe Perret, Marie Maistre, Paula Cristina Dias] We investigate whether a mosaic of habitats of different quality functions as a source-sink system for the Blue Tit Parus caeruleus L. Breeding parameters, especially laying date, clutch size and breeding success have been studied in relation to the food supply in three habitats: two habitats, one rich and one poor, next to each other on the mainland (southern France) and one poor habitat on the island of Corsica. Food resources are more abundant and are available earlier in the season in the rich habitat than in both the mainland and the island poor habitats. The timing of breeding is nicely timed on the food peak of abundance in the rich mainland habitat and in the poor insular one but tits are mistimed in the poor mainland habitat because they start to breed too early in relation to food availability. Such patterns strongly suggest that the rich mainland habitat where birds produce many fledglings functions as a source from which birds emigrate in the poor habitat which functions as a sink. These birds which are genetically programmed to breed in the source habitat become mistimed in the sink. Tits on Corsica which are isolated from any mainland population have adjusted their breeding traits on the local patterns of food availability and abundance. This hypothesis is supported by the existence of a strong genetic component of laying date which has been experimentally proved. SPB Academic Publishing bv, 1992 Parus caeruleus nationallicence source-sink nationallicence food resources nationallicence nestboxes nationallicence Quercus pubescens nationallicence Q. ilex nationallicence clutch size nationallicence laying date nationallicence caterpillars nationallicence habitat quality nationallicence genetics nationallicence Blondel Jacques Centre National de la Recherche Scientifique, B. P. 5051, 34033, Montpellier, France aut Perret Philippe Centre National de la Recherche Scientifique, B. P. 5051, 34033, Montpellier, France aut Maistre Marie Centre National de la Recherche Scientifique, B. P. 5051, 34033, Montpellier, France aut Cristina Dias Paula Centre National de la Recherche Scientifique, B. P. 5051, 34033, Montpellier, France aut Landscape Ecology Kluwer Academic Publishers 6/3(1992-02-01), 213-219 0921-2973 6:3<213 1992 6 10980 https://doi.org/10.1007/BF00130032 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00130032 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Blondel Jacques Centre National de la Recherche Scientifique, B. P. 5051, 34033, Montpellier, France aut NATIONALLICENCE 700 1- Perret Philippe Centre National de la Recherche Scientifique, B. P. 5051, 34033, Montpellier, France aut NATIONALLICENCE 700 1- Maistre Marie Centre National de la Recherche Scientifique, B. P. 5051, 34033, Montpellier, France aut NATIONALLICENCE 700 1- Cristina Dias Paula Centre National de la Recherche Scientifique, B. P. 5051, 34033, Montpellier, France aut NATIONALLICENCE 773 0- Landscape Ecology Kluwer Academic Publishers 6/3(1992-02-01), 213-219 0921-2973 6:3<213 1992 6 10980 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer