caa a22 4500 47709130X CHVBK 20180405111515.0 cr unu---uuuuu 170330e19960901xx s 000 0 eng 10.1007/BF01237879 doi (NATIONALLICENCE)springer-10.1007/BF01237879 Density-dependent natural selection in Drosophila [Elektronische Daten] Trade-offs between larval food acquisition and utilization [Amitabh Joshi, Laurence Mueller] Summary: Natural selection at high densities has often been postulated to favour the evolution of greater efficiency of food use. Contrary to this expectation, a previous study suggested the existence of a trade-off between larval feeding rate and efficiency at using food to complete larval development in populations ofDrosophila melanogaster subjected to crowding for many generations. In this paper, we confirm the generality of such a density-dependent trade-off between food acquisition and utilization by demonstrating its occurrence in a new set ofDrosophila populations subjected to extreme larval crowding. We suggest that such trade-offs between food acquisition and food use may represent a general phenomenon in organisms exhibiting scramble competition. We test and reject the possible mechanistic explanation that decreased efficiency of food use in faster-feeding larvae may merely be a consequence of a faster passage of food through the gut, leading to incomplete assimilation of nutrients and energy. Chapman & Hall, 1996 Drosophila melanogaster nationallicence food acquisition nationallicence food utilization nationallicence efficiency nationallicence trade-offs nationallicence density-dependent selection nationallicence Joshi Amitabh Department of Ecology and Evolutionary Biology, University of California, 92717, Irvine, CA, USA aut Mueller Laurence Department of Ecology and Evolutionary Biology, University of California, 92717, Irvine, CA, USA aut Evolutionary Ecology Kluwer Academic Publishers 10/5(1996-09-01), 463-474 0269-7653 10:5<463 1996 10 10682 https://doi.org/10.1007/BF01237879 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF01237879 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Joshi Amitabh Department of Ecology and Evolutionary Biology, University of California, 92717, Irvine, CA, USA aut NATIONALLICENCE 700 1- Mueller Laurence Department of Ecology and Evolutionary Biology, University of California, 92717, Irvine, CA, USA aut NATIONALLICENCE 773 0- Evolutionary Ecology Kluwer Academic Publishers 10/5(1996-09-01), 463-474 0269-7653 10:5<463 1996 10 10682 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer