Fitting Woodcock with Argos satellite transmitters in France. Yves FERRAND & Jean-Louis CAZENAVE

Transcription

1 Fitting Woodcock with Argos satellite transmitters in France Yves FERRAND & Jean-Louis CAZENAVE

2 Project : woodcock fitted in European Russia in autumn 04 Questions : - What are the routes taken by woodcock during the prenuptial and postnuptial migrations? - What are the number, location and duration of stop-over? - What is the impact of weather conditions on the timing of departure and migration chronolgy? ONCFS/CNB Agreement signed on 7 March 04 Mission in Great-Britain from 3 to 5 March 04 to learn how to fit Woodcock with a satellite tag

3 Where are we? Satellite tags were bought at Microwave Telemetry, and tested in autumn 04. These tags weigh 9.5 g and their battery is charged by a solar panel. Because of difficulties with Russian administration, woodccok were fitted in France. Three sites were chosen by mutual agreement. Forest of La Corbière (35) Ringers Franck Drouyet David Tannoux Eric Bocquier Frédéric Delamarre Sébastien Painchaud CEL (40) Ringers Jean-Marc Desbieys Jean-Michel Boinot Sébastien Daubriac Staff / fitting Yves Ferrand François Gossmann Damien Coreau Pierre Launay Domaine du Liby (07) Puechabon (34) Ringers Fabrice Etienne Luc Aurousseau Dominique Fialon

4 Woodcock were fitted following the «English» method. D. Tannoux

5 ARGOS system and specifications of transmissions The satellite tag has a duty cycle of 0 hours transmission followed by 48 hours in sleep mode Locations are distributed in 8 classes depending on transmission quality; we retain only 3 classes: - (500 m < < 500 m) - (50 m < < 500 m) - 3 (< 50 m)

6 Presentations «landaises» Aliénor «ardéchoises» Andéol «bretonnes» Argoat Female adult 7//05 Male adult 7//05 Female adult 4//05 Hada Clappas Arvor Female adult 7//05 Male juvenile 0//05 Female adult 3//05 Olympe Liby Morgane Female adult 7//05 Female juvenile 7//05 Female adult 4//05 Segosa Remeze Queffelec Female adult 7//05 Female adult //05 Female adult 3//05

7 5/0/5 5/0/5 0/0/5 0/0/5 5/0/5 5/0/5 0/03/5 0/03/5 07/03/5 07/03/5 /03/5 /03/5 7/03/5 7/03/5 /03/5 /03/5 7/03/5 7/03/5 0/04/5 0/04/5 06/04/5 06/04/5 Migration departure According to the region Bretagne Ardèche Aquitaine 0 According to sex and age femelles mâles juveniles 0

8 Routes Average distance: 900 km «English» woodcock,5 600 km km 0,

9 Breeding sites and estimated arrival dates ardéchoises landaises bretonnes 7 April 4 May 0 April April 9 April 9 April st April 6 April April April April 6 April

10 First results about the effects of weather conditions on Woodcock prenuptial migration and especially on: - date of departure/movements - stop-over 3- date of arrival on breeding sites F. Etienne B. Bellon

11 - Effect on date of departure/movements Departures start in the nd decade of March till end of March March ALIENOR 700 km 800 km STOP SW POLOGNE HADA 00 km 670 km Arrivée POLOGNE OLYMPE Départ??? 50 km STOP PREALPES 50 km SEGOSA Départ??? 400 km 550 km STOP SE POLOGNE ARGOAT 500 km??? ARVOR 7 AU MORGANE 600 km 50 km A QUEFFELEC 60 km 00 km km Arrivée RUSSIE CLAPPAS Départ??? 00 km 730 km quand?? A LIBY 00 km STOP SL 540 REMEZE 550km 860 km STOP RUSS ANDEOL 470 km + 850km+ 000 STOP NE UKRAINE April Period with a maximum of birds in flight

12 - Effect on date of departure/movements N Low pressure High pressure Favourable conditions for prenuptial migration in Europe

13

14

15 - Effect on date of departure/movements Usually, we observe: An example: Remeze at Orange (SE France) from 7 to 30 March increase of temperature decrease of barometric pressure weak wind speed at night

16 - Effect on stop-over April ALIENOR 3490km / 3j 70 km 80 km Stop SW Pologne 350 km 60 km ESTONIE HADA 830km / 0j 400 km 430 km POLOGNE OLYMPE 860km / 35j? 60k Stop Suisse 600km BIELORUSSIE SEGOSA 4340km / 45j? 40km (départ?) 560km Stop Nord Carpates SE Pol 730km 80km Stop Russie ARGOAT 875 km + 80 (/04) RUSSIE 3055km / 9j ARVOR 3050km / j 860 km 40 km 90 km 760 km 3 5 RUS MORGANE 600km NE 50km LETTONIE 0km / 0j Pol. QUEFFELEC 60k 840km 3 650km SW 680k RUSSIE 330km / 0j 5 0 Russie CLAPPAS 970km : j?? 970 km POLOGNE LIBY 0km Stop 540k 3 330km 340k OURAL 4060km / 8j 9 4 Slov 0 0 REMEZE 400km Stop W Russie 470km RUSSIE 870km / 7j BRIANSK ANDEOL 60km / 40j 460 km km Stop W Russie BRIANSK 0 km km 380 A

17 - Effect on stop-over

18

19 - Effect on stop-over Minimum temperature April 3 April 4 April

20 - Effect on stop-over Snowfall

21 - Effect on stop-over Ground temperature

22 - Effect on stop-over Usually we observe: decrease of temperature increase of barometric pressure An example: Weather conditions from st to 0 April at Briansk region where Remeze and Andeol stopped

23 - Effect on date of arrival on breeding sites In the last part of migration bad weather conditions do not lead to long stop-over, they just delay arrival on breeding site. Woodccok migrate even in case of head wind, low temperature and snowfall.

24 Summary of observations in spring 05 Temperature is one of the main meteorological factors which has an effect on Woodcock spring migration. It is associated with an inverse evolution of barometric pressure. Effect of wind is usually occasional. Till 0/5 knots, there is usually no effect. At a higher speed, it has an influence on migration and can be the cause of drifts observed on some birds. Frozen and/or snowy soils seem to stop migration in spring. Sky condition (cloudy or not) can facilitate or slow down migration but they stop movements only in extreme cases of bad weather except in the last part of migration. Except temperature, no factor has an effect determining to it alone.

25 Conclusions - Fitting held in check - Satellites tags without any problem - No lost bird (predation, death after fitting,.) A total success to be renewed First exploitation of results in 06 in a common scientific paper with English biologists (A. Hoodless, Game & Wildlife Conservation Trust) Visit the website