1. Spatial and seasonal variation in abundance within an insular grey parrot population

   Valle, S., Collar, N. J., Harris, W. E. & Marsden, S. J., Rhag 2017, Yn: African Journal of Ecology. 55, 4, t. 433-442

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

2. Status and trends of the seabirds breeding at Tinhosa Grande Island, São Tomé e Príncipe

   Valle, S., Barros, N. & Wanless, R., 2014, BirdLife International, Cambridge, UK. 27 t.

   Allbwn ymchwil: Llyfr/Adroddiad › Adroddiad Comisiwn

3. Cyhoeddwyd

   Trapping method and quota observance are pivotal to population stability in a harvested parrot

   Valle, S., Collar, N., W. Edwin, H. & Marsden, S., Ion 2018, Yn: Biological Conservation. 217, t. 428-436

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

4. Using encounter rates as surrogates for density estimates makes monitoring of heavily-traded grey parrots achievable across Africa

   Marsden, S. J., Loqueh, E., Takuo, J. M., Hart, J. A., Abani, R., Ahon, D. B., Annorbah, N. N. D., Johnson, R. & Valle, S., 2015, Yn: Oryx. 50, 4, t. 617-625

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid

5. Cyhoeddwyd

   What can the abundance of Grey Parrots on Príncipe Island tell us about large parrot conservation?

   Valle, S., Collar, N. J., Melo, M. & Marsden, S. J., 2021, Yn: Journal of Tropical Ecology. 36, 6, t. 293- 297

   Allbwn ymchwil: Cyfraniad at gyfnodolyn › Erthygl › adolygiad gan gymheiriaid