Louis Lemmens of Kuikenbroederij Van Hulst (Veldhoven,
the Netherlands) is acknowledged for his help
with egg collection. We thank Gerard van Kesteren
(Vencomatic BV, Eersel, The Netherlands) for his technical
assistance. The Southern Agriculture and Horticulture
Organization (ZLTO, Den Bosch, the Netherlands)
is acknowledged for partially funding the project.