lunes, 10 de julio de 2017

Upcoming CMRR workshop 2017. Apply now !

Workshop on Capture-Mark-Recapture and -Recovery analysis 2017 : you can subscribe now!

The introductory course aims to introduce students, researchers and environmental managers to the theory and practical aspects of the analysis of capture-mark-recapture and –recovery. 
We will focus on how to estimate survival, recruitment and dispersal probabilities in natural populations.
The course is based on theoretical classes as well as practical sessions with real and simulated data.
No previous knowledge on capture-mark-recapture or capture-mark-recovery analyses is necessary.


 

If you want to subscribe send message to : g.tavecchia-at-uib.es

For more information on the program and course payment : http://populationecologygroup.blogspot.com.es/p/workshop.html

miércoles, 5 de julio de 2017

Storm Petrel Day ended

Photo D. Revenga
Storm Petrel Day at Benidorm Island ended. It ws a good occasion to meet other research teams and set monitoring protocole and collaborative research. Press note (in Spanish) and nice pictures by D. Revenga here. All is ready for the next 25 years!
B Massa & A Sanz (Photo: D. Revenga)




martes, 27 de junio de 2017

Gull tracking on the news!

Photo: G. Tavecchia
GSM/GPS data are generating a growing interest in gulls' feeding strategy. A new article by E. Soto in the newspaper El Mundo (here) has just been published on the monitoring of Yellow-legged Gulls at Dragonera. Long-distance tracks and daily feeding strategies are on the spot. Thank also to the help of T. Muñoz from the GOB (Grup Balear d'Ornitologia I Defensa de la Naturalesa)

sábado, 24 de junio de 2017

Storm Petrel Days at Benidorm Island


The 29-30th of June the Natural Park of Sierra Gelada organizes the European Storm Petrel Day at Benidorm to mark the 25 years of populaiton monitoring. 
Special guest: Dr A. Sanz-Aguilar, who contributed to more than half of the period. 

martes, 20 de junio de 2017

New Publication on Spoonbill population dynamics!

Tenan S, Fasola M, Volponi S, Tavecchia G. Conspecific and not performance-based attraction on immigrants drivescolony growth in a waterbird. J Anim Ecol. 2017;00:1–8. https://doi.org/10.1111/1365-2656.12690

Abstract
  1. Local recruitment and immigration play an important part in the dynamics and growth of animal populations. However, their estimation and incorporation into open population models is, in most cases, problematic. We studied factors affecting the growth of a recently established colony of Eurasian spoonbill (Platalea leucorodia) and assessed the contribution of local recruits, i.e. birds born in the colony, and immigrants, i.e. birds of unknown origin, to colony growth.
  2. We applied an integrated population model that accounts for uncertainty in breeding state assignment and merges population surveys, local fecundity and individual longitudinal data of breeding and non-breeding birds, to estimate demographic rates and the relative role of recruitment and immigration in driving the local dynamics. We also used this analytical framework to assess the degree of support for the ‘performance-based’ and ‘conspecific attraction’ hypotheses as possible mechanisms of colony growth.
  3. Among the demographic rates, only immigration was positively and significantly correlated with population growth rate. In addition, the number of immigrants settling in the colony was positively correlated with colony size in the previous and current year, but was not correlated with fecundity of the previous year.
  4. Our results suggest that the variation in immigration affected colony dynamics and that conspecific attraction likely triggered the relevant role of immigration in the growth of a recently formed waterbird colony, supporting the need of including immigration in population analysis.
You can see press release (in Italian) following the links belows:
http://www.ilvelino.it/it/article/2017/06/08/oltre-500-esemplari-di-spatola-nel-delta-del-po/6a079c85-14eb-4359-9659-07fdbd153b93/

https://www.galileonet.it/2017/06/la-spatola-nel-delta-del-po-ama-la-compagnia/

http://www.quotidiano.net/benessere/animali/animali-spatola-po-1.3184337

http://www.italiaambiente.it/2017/06/08/uccello-spatola-sul-delta-del-po-due-cinquecento-28-anni/

http://www.greencity.it/ambiente/9472/oltre-500-esemplari-di-spatola-nel-delta-del-po.html

http://www.meteoweb.eu/2017/06/ambiente-ispra-uno-studio-rivela-la-singolare-diffusione-di-uccello-spatola-nel-delta-del-po/914077/

http://www.periodicodaily.com/2017/06/09/oltre-500-esemplari-di-spatola-nel-delta-del-po/

https://www.ladeadellacaccia.it/index.php/oltre-500-esemplari-di-spatola-nel-delta-del-po-45712/

miércoles, 14 de junio de 2017

The mistery of the route to the Cantabric Sea solved!

Tracking data offered a first breakthrough to solve the mystery of the route to the Cantabric Sea.   
Yellow-legged gulls from the Balearic islands have been regularly seen in the Cantabric coast, but the route to Northern Spain was a mystery. Do they fly around the Iberian peninsula or throught the Ebro valley ? Do they use the Ebro river as a landmark? Do they reach the Cantabric sea from France? 
Last year preliminary data provided a first piece of the puzzle when a gull moved North following the Ebro river to Zaragoza. However the radio failed at the end of the summer and the route to the Cantabric sea along the Ebro river was not proved. This summer tracking data deliver the solution to the mystery, showing what is likely to be the main route to the Cantabric Sea: the Ebro valley. Interestingly, the route seems to pass north of the river and through the Basque Mountains at Estella. To be continued....

martes, 30 de mayo de 2017

Yellow Legged Gulls: new tracks !

A Yellow Legged gull marked as a breeder in Dragonera Island (Balearic archipelago) moved North to Barcelona. It continued the journey to Narbonne. Will it move up the Canal Du Midi or move to Camargue ? Place your bet.

To be continued....