Skip to ContentSkip to Navigation
About us Latest news News News articles

Staging ecology of black-tailed godwits in Portuguese rice fields and correlations with breeding season events

14 June 2010

PhD ceremony: Mr. P.M.G. Lourenço, 16.15 uur, Academiegebouw, Broerstraat 5, Groningen

Thesis: Staging ecology of black-tailed godwits in Portuguese rice fields and correlations with breeding season events

Promotor(s): prof. T. Piersma

Faculty: Mathematics and Natural Sciences


Continental black-tailed godwits Limosa limosa limosa stage in the rice fields of Iberia during migration between West Africa and Northern Europe. Pedro Lourenço proposes some management guidelines to ensure the conservation of this critical staging area for black-tailed godwits, as well as favour the local bird community: keeping part of the rice fields flooded in winter, phasing ploughing activities along the winter and including the most important rice field areas for godwits in the local protected areas. A total of 53000-59000 birds use each year the rice fields around the estuaries of the Tejo and Sado rivers, Portugal (representing roughly 40% of the flyway population now estimated to count 135000-140000 birds). Individuals stay in the area for an average 22-25 days. These birds forage on rice seeds; preferring rice fields that are flooded and that have already been ploughed, which have the highest rice abundances. Godwit flocks deplete the rice fields during their staging period, but move to new fields, made available by farmers ploughing the fields, as soon as the intake rates fall below the necessary levels for body maintenance. The timing of the staging period is not correlated to the timing of breeding season events, nor to breeding success correlates. This fact, and the good feeding conditions found by godwits in Portugal suggest this step of the migration is not contributing to the ongoing decline of this globally near-threatened species. Still, changes in farming practices and a reduction in the rice farmed area may pose threats in the long-term.


Last modified:13 March 2020 01.15 a.m.
View this page in: Nederlands

More news

  • 29 November 2023

    Three FSE researchers receive NWO XS grant

    Three researchers of the Faculty of Science and Engineering have been awarded an ENW-XS grant by the Dutch Research Council (Nederlandse Organisatie voor Wetenschappelijke Onderzoek, NWO): Prof. A.I. Guskov the Groningen Biomolecular Sciences and...

  • 29 November 2023

    UG professor Jayawardhana appointed scientific director DISC

    Bayu Jayawardhana has been appointed scientific director of DISC, the interuniversity research institute and graduate school that unites all university groups in the Netherlands that are active in systems and control theory and engineering. The...

  • 23 November 2023

    Two Major European grants for Groningen researchers

    Researchers Clemens Mayer and Danny Incarnato of the University of Groningen have been awarded an ERC Consolidator Grant.