martes, 13 de septiembre de 2016

WORKSHOP ON CAPTURE-RECAPTURE AND -RECOVERY ANALYSIS, 21-25 November, Mallorca, Spain

UPCOMING WORKSHOP : WORKSHOP ON CAPTURE-RECAPTURE AND -RECOVERY ANALYSIS

21-25 November 2016, Mallorca, SPAIN

Photo: F. Sergio
The course aims to introduce students, researchers and environmental managers to the theory and practical aspects of the analysis of capture-mark-recapture and –recovery data to estimate survival, recruitment and dispersal probabilities. The course is based on theoretical classes as well as practical sessions with real and simulated data.



Information here  or contact directly  g.tavecchia-at-uib.es
 
 Dead line for registration: October 2016
Places: 20

martes, 6 de septiembre de 2016

G.E.P. at the Simon Fraser University

Artwork by G. Smith, 1965
G. Tavecchia, from the GEP, is visiting the Simon Fraser University at Burnaby Mountain (Canada) with a fellowship from the Spanish Ministry of Education.  
During the 3-months at SFU he will work with Prof. C. Schwarz on an application of site-occupancy models.

domingo, 28 de agosto de 2016

Summering in Eastern Spain

The three Yellow Legged Gulls equipped with GPS-GSM in Mallorca at the beginning of this summer decided to spend the summer in different places. As many tourists, however, they chose to spend the summer in North-Eastern Spain. One (green cyrcle) moved up to Zaragoza, a second one stayed in Mallorca (blue cyrcle) and a third spent the summer near Barcelona (red cyrcle). 


Soon will be time to decide where to spend the winter ..?! 

miércoles, 6 de julio de 2016

New Publication on the role of dispersal in animal populations

Tavecchia, G., Tenan, S., Pradel, R., Igual, J.-M., Genovart, M. and Oro, D. 2016 : Climatic-driven vital rates do not always mean climate-driven population. Global Change Biology. doi10.1111/gcb.13330

Abstract: Current climatic changes have increased the need to forecast population responses to climate variability. A common approach to address this question is through models that project current population state using the functional relationship between demographic rates and climatic variables. We argue that this approach can lead to erroneous conclusions when interpopulation dispersal is not considered. We found that immigration can release the population from climate-driven trajectories even when local vital rates are climate dependent. We illustrated this using individual-based data on a trans-equatorial migratory seabird, the Scopoli's shearwater Calonectris diomedea, in which the variation of vital rates has been associated with large-scale climatic indices. We compared the population annual growth rate λi, estimated using local climate-driven parameters with ρi, a population growth rate directly estimated from individual information and that accounts for immigration. While λi varied as a function of climatic variables, reflecting the climate-dependent parameters, ρi did not, indicating that dispersal decouples the relationship between population growth and climate variables from that between climatic variables and vital rates. Our results suggest caution when assessing demographic effects of climatic variability especially in open populations for very mobile organisms such as fish, marine mammals, bats, or birds. When a population model cannot be validated or it is not detailed enough, ignoring immigration might lead to misleading climate-driven projections.

lunes, 13 de junio de 2016

Scopoli's Shearwaters: new press release and radio interview !

Photo Ana Sanz-Aguilar
A new press release on the two last work on Scopoli Shearwaer by the G.E.P. appeared this week at "B@leòpolis" the scientific suplement of "El Mundo" (Balearic version). You can read the full note here (in Spanish).

J.-M. Igual (GEP) and M. McMinn on Shearwater management actions at "Balears Fa Ciència" is here (from 10').

martes, 31 de mayo de 2016

Spring 2016 campaign on Lilford's lizard ended!

The 2016 spring campaign on Lilford's lizard ended last week. It has been a difficult one, with many days of bad weather and several unexpected problems with boat and logisitc....but hey, this is job. Populations reached a very low level, but it seems there will be many new recruits in October. Thank to the many people from the GEP who gave their help.

domingo, 29 de mayo de 2016

First long tracks from Dragonera

The GSM/GPS devices are sending interesting information on birds' movements. Marked gulls seem to have moved their core area northward, between the Delte of the river Llobregat and the landfill north of Barcelona city.