Faculteit Biologie: Voorbeeld: Personeel: Personal pages: gerdiendejong

<body> <a name="_Top"> </a> <table id="main" width="750" border="0" cellspacing="0" cellpadding="0" summary="Content"> <tr> <td valign="top" height="250"></td> <td valign="top" id="content"><h2>dr Gerdien de Jong</h2> <table border="0" cellpadding="4" cellspacing="0" style="border-collapse: collapse" bordercolor="#111111"> <tr> <td valign="top">Padualaan 8<br> 3584 CH Utrecht <br> The Netherlands </td> <td valign="top">  </td> <td valign="top">tel + 31 30 253 2246<br> fax + 31 30 251 3655<br> email: <a href="mailto:g.dejong@bio.uu.nl">g.dejong@bio.uu.nl</a></td> </tr> </table> <ul> <li><strong>Evangelische Omroep / Evangelical Broadcasting</strong></li> <li><a href="#resint" target="_self"><strong>Research Interests</strong></a><ul> <li><a href="#droso" target="_self"><i>Drosophila research</i></a></li> <li><a href="#theoretical" target="_self"><i>Theoretical work</i></a></li> </ul> </li> <li><a href="#teaching" target="_self"><strong>Teaching</strong></a></li> <li><strong><a target="_self" href="#publications">Publications from 1990</a></strong></li> <li><a target="_blank" href="ouderdag_lengte.ppt"><strong>Presentatie ouderdag 2003 - lengte</strong></a></li> <li><a target="_blank" href="ouderdag_zoogdieren%20.ppt"><strong>Presentatie ouderdag 2003 - zoogdieren</strong></a></li> <li><strong><a href="budapest_Adaptive_Dynamics.ppt">Presentatie workshop "Adaptive Dynamics", Budapest, June 2004</a></strong></li> </ul> <hr> <p><strong>Evangelische Omroep /Evangelical Broadcasting</strong></p> <p style="margin-top: 0; margin-bottom: 0"><strong>English / Engels</strong></p> <p style="margin-top: 0; margin-bottom: 0"><a href="BBC%20and%20EO%20episode%201%20English.pdf"> pdf</a> documenting editing in episode 1</p> <p style="margin-top: 0; margin-bottom: 0"><a href="BBC%20and%20EO%20episode%202%20Eng.pdf"> pdf</a> documenting editing in episode 2</p> <p style="margin-top: 0; margin-bottom: 0"> </p> <p style="margin-top: 0; margin-bottom: 0"><b>Nederlands / Dutch</b></p> <p style="margin-top: 0; margin-bottom: 0"><a href="BBC%20en%20EO%20episode%201%20Ned.pdf"> pdf</a> documenteert veranderingen in episode 1</p> <p style="margin-top: 0; margin-bottom: 0"><a href="BBC%20en%20EO%20episode%202%20Ned.pdf"> pdf </a>documenteert veranderingen in episode 2</p> <p style="margin-top: 0; margin-bottom: 0"> </p> <p style="margin-top: 0; margin-bottom: 0"> </p> <p style="text-indent: 1px; margin-top: 0; margin-bottom: 0"> <strong style="font-weight: 400">YouTube videos <a href="http://www.youtube.com/profile?user=Obdurodon">Obdurodon</a>:</strong></p> <p style="text-indent: 1px; margin-top: 0; margin-bottom: 0">  </p> <p class="MsoNormal" style="text-indent: 1px; margin-top: 0; margin-bottom: 0"> <span lang="NL" style="letter-spacing: 0pt; layout-grid-mode: both">Nederlands / Dutch</span></p> <p class="MsoNormal" style="text-indent: 1px; margin-top: 0; margin-bottom: 0"> <span lang="NL" style="letter-spacing: 0pt; layout-grid-mode: both"> </span><span style="letter-spacing: 0pt; layout-grid-mode: both"><a href="http://nl.youtube.com/watch?v=snr2TCbVR7s">EO Censuur 1</a>              Episode 10 ontbreekt</span></p> <p class="MsoNormal" style="text-indent: 1px; margin-top: 0; margin-bottom: 0"> <span style="letter-spacing: 0pt; layout-grid-mode: both"> <a href="http://www.youtube.com/watch?v=z39JcGz1U40"> EO Censuur 2 </a>             knippen in episode 1</span></p> <p class="MsoNormal" style="text-indent: 1px; margin-top: 0; margin-bottom: 0">  <a href="http://www.youtube.com/watch?v=B8DcLFygzWA">EO Censuur 3</a>              knippen in episode 2</p> <p class="MsoNormal" style="margin-top: 0; margin-bottom: 0"><span lang="EN-GB"> <font color="#000000"><span lang="EN-US"> </span></font></span></p> <p class="MsoNormal" style="margin-top: 0; margin-bottom: 0"><span lang="EN-GB">  </span></p> <p class="MsoNormal" style="text-indent: 1px; margin-top: 0; margin-bottom: 0"> <span lang="EN-GB">Englisch / Engels </span></p> <p class="MsoNormal" style="text-indent: 1px; margin-top: 0; margin-bottom: 0"> <span lang="EN-GB"><a href="http://www.youtube.com/watch?v=L3qoXqHNmq0"> Life of Mammals creationist version 1 </a>               cuts in episode 1</span></p> <p class="MsoNormal" style="text-indent: 1px; margin-top: 0; margin-bottom: 0"> <a href="http://www.youtube.com/watch?v=A9b1bQSb_nI">Life of Mammals creationist version 2 </a>               cuts in episode 2</p> <p class="MsoNormal" style="text-indent: 1px; margin-top: 0; margin-bottom: 0"> <a href="http://www.youtube.com/watch?v=AZ5xnK4cDwc">Life of Mammals creationist version 3</a><a href="http://www.youtube.com/watch?v=nEQiPccZVdw"> </a>               episode 10 missing; BBC</p> <p>Commentaar       http://evolutie.blog.com/2007/7/</p> <hr> <p> </p> <p><a name="resint"><strong>Research Interests</strong></a></p> <p>My research interests are a combination of experimental and theoretical work, on a number of subjects.</p> <ol> <li><a href="#droso" target="_self"><i>Drosophila research</i></a><i> </i></li> <li><a href="#theoretical" target="_self"><i>Theoretical work</i></a></li> </ol> <p><b><a name="droso"><i>1 Drosophila research</i></a></b></p> <p>Body size in <i>Drosophila</i> differs between species, between geographical populations within a species and between different environmental conditions given the same genotype. A sufficient explanation is lacking in all three cases. Body size itself might be selected, but an alternative explanation is that the physiology leading to body size is under selection.</p> <p>Body size in <i>Drosophila melanogaster</i> differs if larvae are raised under different temperatures. Body dimensions as wing length and thorax length have a maximum at an intermediate temperature. My interest is whether larval temperature conditions differences in physiology that lead to different body sizes</p> <p>Body size differs between natural populations of <i>Drosophila melanogaster</i>, larger body size being associated with more temperature latitudes. A preliminary hypothesis is that at more temperate latitudes, food availability is less predictable, and starvation resistance under stronger selection. Selection for starvation resistance would select for high larval food storage and large body size. Large body size would come about by high larval efficiency in physiology. My interest is in physiological differences between geographic populations, and the genetics underlying physiological differences. Part of the question is whether many physiological traits are correlated with body size, and under the control of simultaneously regulated genes.</p> <p>Drosophila species share a very comparable genome, but differ highly in size. The genomics of (quantitative) differences between species is one of the major challenges of biological research.</p> <p><b><a name="model"><i>2 </i></a><a name="theoretical"><i>Theoretical work</i></a></b></p> <p>My theoretical interests are in combining ecological and genetic modeling in order to obtain theories of the influence of ecological processes as density dependent number regulation on the evolution of phenotypically plastic traits and life histories. The challenge for the future is to extend the existing theory, and to use experimental ecology and evolution to test the theoretical predictions. </p> <p>I'm continuing my research on the quantitative genetics of reaction norms. Density dependent number regulation exerts a large influence on the evolved optimized reaction norm. As a consequence, discrete regions with food show different patterns of evolved reaction norms, The reaction norms can differ to the extend that speciation is indicated.</p> <p>Life history theory lacks explicit density dependent number regulation. I've developed a model for ESS clutch size in birds under density dependent number regulation. The model leads to the lowest possible optimum clutch size at the lowest maximum fitness that is consistent with population existence, and to the maximum number of individuals in the population. The model shows that age low fecundity in log live birds, together with high age of maturity, is not a consequence of inherent genetic trade-offs but of demographic constraints as stable population size.</p> <hr> <p><strong><a name="teaching">Teaching</a></strong></p> <p>At present(2006), my main teaching is a level-3 course for 2nd year biology students on <a target="_top" href="../../onderwijs">Evolutionary Ecology</a>. The second teaching commitment is a level-2 course at the start of the second year on <a href="../../onderwijs">Behavioral Ecology</a>. </p> <hr> <p><a name="publications"><b>Publications from 1990</b></a></p> <ul> <li><a href="2005">2005</a></li> <li><a href="2004">2004</a></li> <li><a href="2003">2003</a></li> <li><a href="2002">2002</a></li> <li><a href="2001">2001</a></li> <li><a href="2000">2000</a></li> <li><a href="1999">1999</a></li> <li><a href="1998">1998</a></li> <li><a href="1997">1997</a></li> <li><a href="1996">1996</a></li> <li><a href="1995">1995</a></li> <li><a href="1994">1994</a></li> <li><a href="1993">1993</a></li> <li><a href="1992">1992</a></li> <li><a href="1991">1991</a></li> <li><a href="1990">1990</a></li> </ul> <p></p> <b> <p> </b></td> </tr> <tr> <td height="50"></td> <td align="left" valign="bottom"> <div class="teklein"><a target="_self" href="#_Top"> <img border="0" src="../../images/solis/pijl-up.gif" align="right" width="25" height="28"></a> Last update: 26-Oct-2007<br /> <a href="mailto:webmaster@bio.uu.nl">webmaster@bio.uu.nl</a></div> </td> </tr> <tr> <td><img src="../../images/tpix.gif" width="36" height="1" alt="" /></td> <td><img src="../../images/tpix.gif" width="714" height="1" alt="" /></td> </tr> </table> </body>