caa a22 4500 445856963 CHVBK 20180317145431.0 cr unu---uuuuu 170323e20110201xx s 000 0 eng 10.1007/s10592-009-9984-z doi (NATIONALLICENCE)springer-10.1007/s10592-009-9984-z Induced dispersal in wildlife management: experimental evaluation of the risk of hybrid breakdown and the benefit of hybrid vigor in the F1 generation [Elektronische Daten] [Clare Holleley, Richard Nichols, Michael Whitehead, Melissa Gunn, Jyoutsna Gupta, William Sherwin] Management practices often aim to increase the level of gene flow by either: introducing animals from captive breeding programs, translocating animals from abundant areas, or increasing the chance of animals dispersing between populations by creating habitat corridors. These practices provide opportunity for the hybrid offspring of introduced and resident animals to experience either increased fitness (hybrid vigor) or decreased fitness (hybrid breakdown). There is very little quantitative data available to adequately assess whether hybridization is likely to be beneficial or detrimental to populations managed in these ways. Using Drosophila melanogaster populations, we conducted two experiments that simulate the common management practices of translocation and wildlife habitat corridors. We monitored the frequency and magnitude of hybrid vigor and hybrid breakdown in F1 hybrids to assess the relative risks and benefits to populations and also monitored net productivity (number of adults produced from controlled crosses) to assess whether the populations were stable or in decline. In the translocation experiment, we observed instances of both significant hybrid vigor and hybrid breakdown, both occurring at a frequency of 9%. In the habitat corridor experiments, populations with moderate to high dispersal (1-4% per generation) did not develop significant hybrid vigor or hybrid breakdown. However, of the populations experiencing low dispersal (0.25% per generation) for 34 generations, 6% displayed significant hybrid vigor and 6% displayed significant hybrid breakdown. These results suggest that in first generation hybrids there may be limited opportunity to utilize hybrid vigor as a tool to increase the short-term viability of populations because there is an equal likelihood of encountering hybrid breakdown that may drive the population into further decline. However, our results apply only to populations of moderate size (N=50; N e=14.3) in the absence of deliberate consanguineous mating. Lastly, we observed that net productivity was positively correlated with dispersal rate, suggesting that initial F1 declines in fitness may be temporary and that it is preferable to maintain high levels of selectable variation via induced dispersal to assist the long-term survival of vulnerable populations. Springer Science+Business Media B.V., 2009 Hybrid vigor nationallicence Hybrid breakdown nationallicence Inbreeding depression nationallicence Drosophila melanogaster nationallicence Conservation nationallicence Management nationallicence Genetic drift nationallicence Holleley Clare Evolution & Ecology Research Centre and School of Biological, Earth & Environmental Sciences, University of New South Wales, 2052, Sydney, NSW, Australia aut Nichols Richard School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, E1 4NS, London, UK aut Whitehead Michael Evolution & Ecology Research Centre and School of Biological, Earth & Environmental Sciences, University of New South Wales, 2052, Sydney, NSW, Australia aut Gunn Melissa Evolution & Ecology Research Centre and School of Biological, Earth & Environmental Sciences, University of New South Wales, 2052, Sydney, NSW, Australia aut Gupta Jyoutsna Evolution & Ecology Research Centre and School of Biological, Earth & Environmental Sciences, University of New South Wales, 2052, Sydney, NSW, Australia aut Sherwin William Evolution & Ecology Research Centre and School of Biological, Earth & Environmental Sciences, University of New South Wales, 2052, Sydney, NSW, Australia aut Conservation Genetics Springer Netherlands 12/1(2011-02-01), 31-40 1566-0621 12:1<31 2011 12 10592 https://doi.org/10.1007/s10592-009-9984-z text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s10592-009-9984-z text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Holleley Clare Evolution & Ecology Research Centre and School of Biological, Earth & Environmental Sciences, University of New South Wales, 2052, Sydney, NSW, Australia aut NATIONALLICENCE 700 1- Nichols Richard School of Biological and Chemical Sciences, Queen Mary University of London, Mile End Road, E1 4NS, London, UK aut NATIONALLICENCE 700 1- Whitehead Michael Evolution & Ecology Research Centre and School of Biological, Earth & Environmental Sciences, University of New South Wales, 2052, Sydney, NSW, Australia aut NATIONALLICENCE 700 1- Gunn Melissa Evolution & Ecology Research Centre and School of Biological, Earth & Environmental Sciences, University of New South Wales, 2052, Sydney, NSW, Australia aut NATIONALLICENCE 700 1- Gupta Jyoutsna Evolution & Ecology Research Centre and School of Biological, Earth & Environmental Sciences, University of New South Wales, 2052, Sydney, NSW, Australia aut NATIONALLICENCE 700 1- Sherwin William Evolution & Ecology Research Centre and School of Biological, Earth & Environmental Sciences, University of New South Wales, 2052, Sydney, NSW, Australia aut NATIONALLICENCE 773 0- Conservation Genetics Springer Netherlands 12/1(2011-02-01), 31-40 1566-0621 12:1<31 2011 12 10592 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer