The Osprey reintroduction in Central Italy: dispersal, survival and first breeding data

Figures & data

Figure 1. Geographical location and abbreviations of the main sites along the coastal wetlands system in Tuscany: black dots from North to South of Tuscany, Massaciuccoli Lake (MAS), Orti-Bottagone Marsh (ORT), Diaccia Botrona Nature Reserve (DBR), Orbetello Lagoon (ORB) and Burano Lake (BUR). Black star: Maremma Regional Park (MRP = release site). The islands of the Tuscany Archipelago and the Scandola Reserve (black dot) in Corsica are also shown.

Figure 2. Map showing long-distance dispersal movements of three reintroduced females in Italy: A4, released in 2009 (black dots and solid lines); L5, released in 2010 (black starts and sketched lines); S5, released in 2010 (black cross and dotted lines). For each location the name of the place or its abbreviation, the date of sighting and the minimum line of sight distance from the previous location (in bold and expressed in km) are shown.

Figure 3. The number of Ospreys observed in the study area per year: juveniles banded and released (black bars), number of immature individuals (grey bars), number of territorial adults that did not reproduce (white bars with skew lines), number of breeders (grey bars with skew lines) and number of wild-born chicks (white bars).

Table 1. Furthest movements of the released Ospreys, ID, sex, date of the end of the PFDP, date and time elapsed from the PFDP (days) until the first resighting, and location (with line of sight distance in km from the release site) are reported.

ID	Sex	Date of the end of the PFDP	Date of first resighting	Time elapsed (days)	Place (km from the release site)	Re-observed in the release area
A1	M	27/08/2006	02/02/2007	159	ORT (50)	22/06/2008
I1	M	27/08/2006	04/09/2006	8	DBR (15)	22/06/2008
B2	M	22/08/2007	27/04/2008	249	ORT (50)	21/05/2009
A3	F	30/08/2008	30/09/2008	31	DBR (15)	never
H3	M	03/08/2008	01/10/2008	59	BUR (40)	never
A4	F	01/09/2009	10/05/2011	616	PDSP, COMO (420)	never
L5	F	03/09/2010	25/05/2011	264	MAS (140)	never
S5	F	08/08/2010	06/05/2012	640	BARCIS LAKE, PORD. (410)	24/05/2012
Mean		04/08 ± 0.39 days		253.2 ± 250 days	142.5 ± 172.6 km

For some birds, the date of the first return in the MRP is also reported.

Table 2. Model selection for survival and resighting rates with recovery rate as kept constant. Age consisted of four age classes: juveniles during summer, juveniles during winter, immatures and adults. Season was summer and winter periods, t means a time effect (i.e. variation between years), np is the number of identifiable parameters and QAICc is the Akaike Information Criterion corrected for sample size. Models are ranked by decreasing QAIC values.

Survival	Resighting	np	Deviance	QAIC	QAICc
age	sex	6	100.66	112.7	113.5
age	season.sex	8	97.56	113.6	115.0
age	season	6	105.13	117.1	118.0
age	i	5	107.28	117.3	117.9
age.sex	season.sex	12	95.95	119.9	123.2
age	t.sex	17	87.46	121.5	128.3
age.sex	season	10	103.21	123.2	125.5
age+t	sex	19	89.63	127.6	136.3