Atlantic Laboratory for Avian Research 
Machias Seal Island
Long-Term Seabird Research and Monitoring
University of New Brunswick
Results and Summary
| The productivity and growth results must first be prefaced with a discussion on data analyses. In previous years measurements of bird mass and wingchord were used for both a) estimating age of chicks with unknown hatch dates, and b) deriving growth rates for chicks within their linear growth period. The method used to conduct these calculations is now being updated to reflect more accurate values for age and growth rate. In previous years, age and growth rates were calculated by taking the regression of all measurements (mass or wingchord or culmen versus age) for all chicks. The new method involves deriving a regression line for each chick and then taking the mean of the total number of individual regression values. Where applicable, data may be presented in two forms, the first representing values calculated in the traditional method and the second showing values calculated with the new method. It is our aim to eventually convert all existing data into the new format. Until such time, please take note of the possible incomparability of 2008 and 2009 data in tables 3b and 5b. |
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