Derek is our consulting statistician with a teaching background and a keen interest in ornithology.  He brings a wealth of experience to the team in terms of statistical analysis of data and modelling design and implementation.  Derek provides input into statistical analysis of water quality, freshwater biota and fauna survey data.  Most notably, as a Kessels & Associates team member, Derek has developed and implemented significant refinements of collision risk models associated with assessing the potential impacts of wind farms on birds and bats.

info@kessels-ecology.co.nz

Relevant Publications (excluding Consultancy Reports)

P Scofield and D Christie (2002)  Beach patrol records indicate a substantial decline in sooty shearwater (Puffinus griseus) numbers.  Notornis (2002) 49(3).

D Christie (2003) Resampling with Excel.  Teaching Statistics  Vol 26. (1)   Royal Statistical Society, UK.

D Christie (2005)  A simple method of estimating forest density.  School Science Review   Vol 86.   Association for Science Education, UK.

D P.Wojcik, MEGodfrey, and D Christie (2006)  Mercury toxicity presenting as Chronic Fatigue, memory impairment and depression: Diagnosis. Neuroendocrinoly Letters Vol 27 (4), 2006.

D Christie (2008)  Extracting data off the internet. Teaching Statistics, Vol 30 (1)  Royal Statistical Society, UK.

(2004)   Kite Charts in Excel.  www.biology4all.com.  University of Central Lancaster, UK.  A specialized spreadsheet for drawing species' abundance along a transect.

(2007)   A beachcomber's guide to New Zealand seabirds.  Waikato Institute of Technology.  A key for identifying dead seabirds from partial remains.    http://www.wintec.ac.nz/index.asp?pageID=2145827978